OSCL-LXR linux-6.0.1/​drivers/​media/​common/​v4l2-tpg/​v4l2-tpg-core.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * v4l2-tpg-core.c - Test Pattern Generator
  *
  * Note: gen_twopix and tpg_gen_text are based on code from vivi.c. See the
  * vivi.c source for the copyright information of those functions.
  *
  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
  */
 
 #include <linux/module.h>
 #include <media/tpg/v4l2-tpg.h>
 
 /* Must remain in sync with enum tpg_pattern */
 const char * const tpg_pattern_strings[] = {
     "75% Colorbar",
     "100% Colorbar",
     "CSC Colorbar",
     "Horizontal 100% Colorbar",
     "100% Color Squares",
     "100% Black",
     "100% White",
     "100% Red",
     "100% Green",
     "100% Blue",
     "16x16 Checkers",
     "2x2 Checkers",
     "1x1 Checkers",
     "2x2 Red/Green Checkers",
     "1x1 Red/Green Checkers",
     "Alternating Hor Lines",
     "Alternating Vert Lines",
     "One Pixel Wide Cross",
     "Two Pixels Wide Cross",
     "Ten Pixels Wide Cross",
     "Gray Ramp",
     "Noise",
     NULL
 };
 EXPORT_SYMBOL_GPL(tpg_pattern_strings);
 
 /* Must remain in sync with enum tpg_aspect */
 const char * const tpg_aspect_strings[] = {
     "Source Width x Height",
     "4x3",
     "14x9",
     "16x9",
     "16x9 Anamorphic",
     NULL
 };
 EXPORT_SYMBOL_GPL(tpg_aspect_strings);
 
 /*
  * Sine table: sin[0] = 127 * sin(-180 degrees)
  *             sin[128] = 127 * sin(0 degrees)
  *             sin[256] = 127 * sin(180 degrees)
  */
 static const s8 sin[257] = {
        0,   -4,   -7,  -11,  -13,  -18,  -20,  -22,  -26,  -29,  -33,  -35,  -37,  -41,  -43,  -48,
      -50,  -52,  -56,  -58,  -62,  -63,  -65,  -69,  -71,  -75,  -76,  -78,  -82,  -83,  -87,  -88,
      -90,  -93,  -94,  -97,  -99, -101, -103, -104, -107, -108, -110, -111, -112, -114, -115, -117,
     -118, -119, -120, -121, -122, -123, -123, -124, -125, -125, -126, -126, -127, -127, -127, -127,
     -127, -127, -127, -127, -126, -126, -125, -125, -124, -124, -123, -122, -121, -120, -119, -118,
     -117, -116, -114, -113, -111, -110, -109, -107, -105, -103, -101, -100,  -97,  -96,  -93,  -91,
      -90,  -87,  -85,  -82,  -80,  -76,  -75,  -73,  -69,  -67,  -63,  -62,  -60,  -56,  -54,  -50,
      -48,  -46,  -41,  -39,  -35,  -33,  -31,  -26,  -24,  -20,  -18,  -15,  -11,   -9,   -4,   -2,
        0,    2,    4,    9,   11,   15,   18,   20,   24,   26,   31,   33,   35,   39,   41,   46,
       48,   50,   54,   56,   60,   62,   64,   67,   69,   73,   75,   76,   80,   82,   85,   87,
       90,   91,   93,   96,   97,  100,  101,  103,  105,  107,  109,  110,  111,  113,  114,  116,
      117,  118,  119,  120,  121,  122,  123,  124,  124,  125,  125,  126,  126,  127,  127,  127,
      127,  127,  127,  127,  127,  126,  126,  125,  125,  124,  123,  123,  122,  121,  120,  119,
      118,  117,  115,  114,  112,  111,  110,  108,  107,  104,  103,  101,   99,   97,   94,   93,
       90,   88,   87,   83,   82,   78,   76,   75,   71,   69,   65,   64,   62,   58,   56,   52,
       50,   48,   43,   41,   37,   35,   33,   29,   26,   22,   20,   18,   13,   11,    7,    4,
        0,
 };
 
 #define cos(idx) sin[((idx) + 64) % sizeof(sin)]
 
 /* Global font descriptor */
 static const u8 *font8x16;
 
 void tpg_set_font(const u8 *f)
 {
     font8x16 = f;
 }
 EXPORT_SYMBOL_GPL(tpg_set_font);
 
 void tpg_init(struct tpg_data *tpg, unsigned w, unsigned h)
 {
     memset(tpg, 0, sizeof(*tpg));
     tpg->scaled_width = tpg->src_width = w;
     tpg->src_height = tpg->buf_height = h;
     tpg->crop.width = tpg->compose.width = w;
     tpg->crop.height = tpg->compose.height = h;
     tpg->recalc_colors = true;
     tpg->recalc_square_border = true;
     tpg->brightness = 128;
     tpg->contrast = 128;
     tpg->saturation = 128;
     tpg->hue = 0;
     tpg->mv_hor_mode = TPG_MOVE_NONE;
     tpg->mv_vert_mode = TPG_MOVE_NONE;
     tpg->field = V4L2_FIELD_NONE;
     tpg_s_fourcc(tpg, V4L2_PIX_FMT_RGB24);
     tpg->colorspace = V4L2_COLORSPACE_SRGB;
     tpg->perc_fill = 100;
     tpg->hsv_enc = V4L2_HSV_ENC_180;
 }
 EXPORT_SYMBOL_GPL(tpg_init);
 
 int tpg_alloc(struct tpg_data *tpg, unsigned max_w)
 {
     unsigned pat;
     unsigned plane;
 
     tpg->max_line_width = max_w;
     for (pat = 0; pat < TPG_MAX_PAT_LINES; pat++) {
         for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
             unsigned pixelsz = plane ? 2 : 4;
 
             tpg->lines[pat][plane] =
                 vzalloc(array3_size(max_w, 2, pixelsz));
             if (!tpg->lines[pat][plane])
                 return -ENOMEM;
             if (plane == 0)
                 continue;
             tpg->downsampled_lines[pat][plane] =
                 vzalloc(array3_size(max_w, 2, pixelsz));
             if (!tpg->downsampled_lines[pat][plane])
                 return -ENOMEM;
         }
     }
     for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
         unsigned pixelsz = plane ? 2 : 4;
 
         tpg->contrast_line[plane] =
             vzalloc(array_size(pixelsz, max_w));
         if (!tpg->contrast_line[plane])
             return -ENOMEM;
         tpg->black_line[plane] =
             vzalloc(array_size(pixelsz, max_w));
         if (!tpg->black_line[plane])
             return -ENOMEM;
         tpg->random_line[plane] =
             vzalloc(array3_size(max_w, 2, pixelsz));
         if (!tpg->random_line[plane])
             return -ENOMEM;
     }
     return 0;
 }
 EXPORT_SYMBOL_GPL(tpg_alloc);
 
 void tpg_free(struct tpg_data *tpg)
 {
     unsigned pat;
     unsigned plane;
 
     for (pat = 0; pat < TPG_MAX_PAT_LINES; pat++)
         for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
             vfree(tpg->lines[pat][plane]);
             tpg->lines[pat][plane] = NULL;
             if (plane == 0)
                 continue;
             vfree(tpg->downsampled_lines[pat][plane]);
             tpg->downsampled_lines[pat][plane] = NULL;
         }
     for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
         vfree(tpg->contrast_line[plane]);
         vfree(tpg->black_line[plane]);
         vfree(tpg->random_line[plane]);
         tpg->contrast_line[plane] = NULL;
         tpg->black_line[plane] = NULL;
         tpg->random_line[plane] = NULL;
     }
 }
 EXPORT_SYMBOL_GPL(tpg_free);
 
 bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 {
     tpg->fourcc = fourcc;
     tpg->planes = 1;
     tpg->buffers = 1;
     tpg->recalc_colors = true;
     tpg->interleaved = false;
     tpg->vdownsampling[0] = 1;
     tpg->hdownsampling[0] = 1;
     tpg->hmask[0] = ~0;
     tpg->hmask[1] = ~0;
     tpg->hmask[2] = ~0;
 
     switch (fourcc) {
     case V4L2_PIX_FMT_SBGGR8:
     case V4L2_PIX_FMT_SGBRG8:
     case V4L2_PIX_FMT_SGRBG8:
     case V4L2_PIX_FMT_SRGGB8:
     case V4L2_PIX_FMT_SBGGR10:
     case V4L2_PIX_FMT_SGBRG10:
     case V4L2_PIX_FMT_SGRBG10:
     case V4L2_PIX_FMT_SRGGB10:
     case V4L2_PIX_FMT_SBGGR12:
     case V4L2_PIX_FMT_SGBRG12:
     case V4L2_PIX_FMT_SGRBG12:
     case V4L2_PIX_FMT_SRGGB12:
     case V4L2_PIX_FMT_SBGGR16:
     case V4L2_PIX_FMT_SGBRG16:
     case V4L2_PIX_FMT_SGRBG16:
     case V4L2_PIX_FMT_SRGGB16:
         tpg->interleaved = true;
         tpg->vdownsampling[1] = 1;
         tpg->hdownsampling[1] = 1;
         tpg->planes = 2;
         fallthrough;
     case V4L2_PIX_FMT_RGB332:
     case V4L2_PIX_FMT_RGB565:
     case V4L2_PIX_FMT_RGB565X:
     case V4L2_PIX_FMT_RGB444:
     case V4L2_PIX_FMT_XRGB444:
     case V4L2_PIX_FMT_ARGB444:
     case V4L2_PIX_FMT_RGBX444:
     case V4L2_PIX_FMT_RGBA444:
     case V4L2_PIX_FMT_XBGR444:
     case V4L2_PIX_FMT_ABGR444:
     case V4L2_PIX_FMT_BGRX444:
     case V4L2_PIX_FMT_BGRA444:
     case V4L2_PIX_FMT_RGB555:
     case V4L2_PIX_FMT_XRGB555:
     case V4L2_PIX_FMT_ARGB555:
     case V4L2_PIX_FMT_RGBX555:
     case V4L2_PIX_FMT_RGBA555:
     case V4L2_PIX_FMT_XBGR555:
     case V4L2_PIX_FMT_ABGR555:
     case V4L2_PIX_FMT_BGRX555:
     case V4L2_PIX_FMT_BGRA555:
     case V4L2_PIX_FMT_RGB555X:
     case V4L2_PIX_FMT_XRGB555X:
     case V4L2_PIX_FMT_ARGB555X:
     case V4L2_PIX_FMT_BGR666:
     case V4L2_PIX_FMT_RGB24:
     case V4L2_PIX_FMT_BGR24:
     case V4L2_PIX_FMT_RGB32:
     case V4L2_PIX_FMT_BGR32:
     case V4L2_PIX_FMT_XRGB32:
     case V4L2_PIX_FMT_XBGR32:
     case V4L2_PIX_FMT_ARGB32:
     case V4L2_PIX_FMT_ABGR32:
     case V4L2_PIX_FMT_RGBX32:
     case V4L2_PIX_FMT_BGRX32:
     case V4L2_PIX_FMT_RGBA32:
     case V4L2_PIX_FMT_BGRA32:
         tpg->color_enc = TGP_COLOR_ENC_RGB;
         break;
     case V4L2_PIX_FMT_GREY:
     case V4L2_PIX_FMT_Y10:
     case V4L2_PIX_FMT_Y12:
     case V4L2_PIX_FMT_Y16:
     case V4L2_PIX_FMT_Y16_BE:
     case V4L2_PIX_FMT_Z16:
         tpg->color_enc = TGP_COLOR_ENC_LUMA;
         break;
     case V4L2_PIX_FMT_YUV444:
     case V4L2_PIX_FMT_YUV555:
     case V4L2_PIX_FMT_YUV565:
     case V4L2_PIX_FMT_YUV32:
     case V4L2_PIX_FMT_AYUV32:
     case V4L2_PIX_FMT_XYUV32:
     case V4L2_PIX_FMT_VUYA32:
     case V4L2_PIX_FMT_VUYX32:
     case V4L2_PIX_FMT_YUVA32:
     case V4L2_PIX_FMT_YUVX32:
         tpg->color_enc = TGP_COLOR_ENC_YCBCR;
         break;
     case V4L2_PIX_FMT_YUV420M:
     case V4L2_PIX_FMT_YVU420M:
         tpg->buffers = 3;
         fallthrough;
     case V4L2_PIX_FMT_YUV420:
     case V4L2_PIX_FMT_YVU420:
         tpg->vdownsampling[1] = 2;
         tpg->vdownsampling[2] = 2;
         tpg->hdownsampling[1] = 2;
         tpg->hdownsampling[2] = 2;
         tpg->planes = 3;
         tpg->color_enc = TGP_COLOR_ENC_YCBCR;
         break;
     case V4L2_PIX_FMT_YUV422M:
     case V4L2_PIX_FMT_YVU422M:
         tpg->buffers = 3;
         fallthrough;
     case V4L2_PIX_FMT_YUV422P:
         tpg->vdownsampling[1] = 1;
         tpg->vdownsampling[2] = 1;
         tpg->hdownsampling[1] = 2;
         tpg->hdownsampling[2] = 2;
         tpg->planes = 3;
         tpg->color_enc = TGP_COLOR_ENC_YCBCR;
         break;
     case V4L2_PIX_FMT_NV16M:
     case V4L2_PIX_FMT_NV61M:
         tpg->buffers = 2;
         fallthrough;
     case V4L2_PIX_FMT_NV16:
     case V4L2_PIX_FMT_NV61:
         tpg->vdownsampling[1] = 1;
         tpg->hdownsampling[1] = 1;
         tpg->hmask[1] = ~1;
         tpg->planes = 2;
         tpg->color_enc = TGP_COLOR_ENC_YCBCR;
         break;
     case V4L2_PIX_FMT_NV12M:
     case V4L2_PIX_FMT_NV21M:
         tpg->buffers = 2;
         fallthrough;
     case V4L2_PIX_FMT_NV12:
     case V4L2_PIX_FMT_NV21:
         tpg->vdownsampling[1] = 2;
         tpg->hdownsampling[1] = 1;
         tpg->hmask[1] = ~1;
         tpg->planes = 2;
         tpg->color_enc = TGP_COLOR_ENC_YCBCR;
         break;
     case V4L2_PIX_FMT_YUV444M:
     case V4L2_PIX_FMT_YVU444M:
         tpg->buffers = 3;
         tpg->planes = 3;
         tpg->vdownsampling[1] = 1;
         tpg->vdownsampling[2] = 1;
         tpg->hdownsampling[1] = 1;
         tpg->hdownsampling[2] = 1;
         tpg->color_enc = TGP_COLOR_ENC_YCBCR;
         break;
     case V4L2_PIX_FMT_NV24:
     case V4L2_PIX_FMT_NV42:
         tpg->vdownsampling[1] = 1;
         tpg->hdownsampling[1] = 1;
         tpg->planes = 2;
         tpg->color_enc = TGP_COLOR_ENC_YCBCR;
         break;
     case V4L2_PIX_FMT_YUYV:
     case V4L2_PIX_FMT_UYVY:
     case V4L2_PIX_FMT_YVYU:
     case V4L2_PIX_FMT_VYUY:
         tpg->hmask[0] = ~1;
         tpg->color_enc = TGP_COLOR_ENC_YCBCR;
         break;
     case V4L2_PIX_FMT_HSV24:
     case V4L2_PIX_FMT_HSV32:
         tpg->color_enc = TGP_COLOR_ENC_HSV;
         break;
     default:
         return false;
     }
 
     switch (fourcc) {
     case V4L2_PIX_FMT_GREY:
     case V4L2_PIX_FMT_RGB332:
         tpg->twopixelsize[0] = 2;
         break;
     case V4L2_PIX_FMT_RGB565:
     case V4L2_PIX_FMT_RGB565X:
     case V4L2_PIX_FMT_RGB444:
     case V4L2_PIX_FMT_XRGB444:
     case V4L2_PIX_FMT_ARGB444:
     case V4L2_PIX_FMT_RGBX444:
     case V4L2_PIX_FMT_RGBA444:
     case V4L2_PIX_FMT_XBGR444:
     case V4L2_PIX_FMT_ABGR444:
     case V4L2_PIX_FMT_BGRX444:
     case V4L2_PIX_FMT_BGRA444:
     case V4L2_PIX_FMT_RGB555:
     case V4L2_PIX_FMT_XRGB555:
     case V4L2_PIX_FMT_ARGB555:
     case V4L2_PIX_FMT_RGBX555:
     case V4L2_PIX_FMT_RGBA555:
     case V4L2_PIX_FMT_XBGR555:
     case V4L2_PIX_FMT_ABGR555:
     case V4L2_PIX_FMT_BGRX555:
     case V4L2_PIX_FMT_BGRA555:
     case V4L2_PIX_FMT_RGB555X:
     case V4L2_PIX_FMT_XRGB555X:
     case V4L2_PIX_FMT_ARGB555X:
     case V4L2_PIX_FMT_YUYV:
     case V4L2_PIX_FMT_UYVY:
     case V4L2_PIX_FMT_YVYU:
     case V4L2_PIX_FMT_VYUY:
     case V4L2_PIX_FMT_YUV444:
     case V4L2_PIX_FMT_YUV555:
     case V4L2_PIX_FMT_YUV565:
     case V4L2_PIX_FMT_Y10:
     case V4L2_PIX_FMT_Y12:
     case V4L2_PIX_FMT_Y16:
     case V4L2_PIX_FMT_Y16_BE:
     case V4L2_PIX_FMT_Z16:
         tpg->twopixelsize[0] = 2 * 2;
         break;
     case V4L2_PIX_FMT_RGB24:
     case V4L2_PIX_FMT_BGR24:
     case V4L2_PIX_FMT_HSV24:
         tpg->twopixelsize[0] = 2 * 3;
         break;
     case V4L2_PIX_FMT_BGR666:
     case V4L2_PIX_FMT_RGB32:
     case V4L2_PIX_FMT_BGR32:
     case V4L2_PIX_FMT_XRGB32:
     case V4L2_PIX_FMT_XBGR32:
     case V4L2_PIX_FMT_ARGB32:
     case V4L2_PIX_FMT_ABGR32:
     case V4L2_PIX_FMT_RGBX32:
     case V4L2_PIX_FMT_BGRX32:
     case V4L2_PIX_FMT_RGBA32:
     case V4L2_PIX_FMT_BGRA32:
     case V4L2_PIX_FMT_YUV32:
     case V4L2_PIX_FMT_AYUV32:
     case V4L2_PIX_FMT_XYUV32:
     case V4L2_PIX_FMT_VUYA32:
     case V4L2_PIX_FMT_VUYX32:
     case V4L2_PIX_FMT_YUVA32:
     case V4L2_PIX_FMT_YUVX32:
     case V4L2_PIX_FMT_HSV32:
         tpg->twopixelsize[0] = 2 * 4;
         break;
     case V4L2_PIX_FMT_NV12:
     case V4L2_PIX_FMT_NV21:
     case V4L2_PIX_FMT_NV12M:
     case V4L2_PIX_FMT_NV21M:
     case V4L2_PIX_FMT_NV16:
     case V4L2_PIX_FMT_NV61:
     case V4L2_PIX_FMT_NV16M:
     case V4L2_PIX_FMT_NV61M:
     case V4L2_PIX_FMT_SBGGR8:
     case V4L2_PIX_FMT_SGBRG8:
     case V4L2_PIX_FMT_SGRBG8:
     case V4L2_PIX_FMT_SRGGB8:
         tpg->twopixelsize[0] = 2;
         tpg->twopixelsize[1] = 2;
         break;
     case V4L2_PIX_FMT_SRGGB10:
     case V4L2_PIX_FMT_SGRBG10:
     case V4L2_PIX_FMT_SGBRG10:
     case V4L2_PIX_FMT_SBGGR10:
     case V4L2_PIX_FMT_SRGGB12:
     case V4L2_PIX_FMT_SGRBG12:
     case V4L2_PIX_FMT_SGBRG12:
     case V4L2_PIX_FMT_SBGGR12:
     case V4L2_PIX_FMT_SRGGB16:
     case V4L2_PIX_FMT_SGRBG16:
     case V4L2_PIX_FMT_SGBRG16:
     case V4L2_PIX_FMT_SBGGR16:
         tpg->twopixelsize[0] = 4;
         tpg->twopixelsize[1] = 4;
         break;
     case V4L2_PIX_FMT_YUV444M:
     case V4L2_PIX_FMT_YVU444M:
     case V4L2_PIX_FMT_YUV422M:
     case V4L2_PIX_FMT_YVU422M:
     case V4L2_PIX_FMT_YUV422P:
     case V4L2_PIX_FMT_YUV420:
     case V4L2_PIX_FMT_YVU420:
     case V4L2_PIX_FMT_YUV420M:
     case V4L2_PIX_FMT_YVU420M:
         tpg->twopixelsize[0] = 2;
         tpg->twopixelsize[1] = 2;
         tpg->twopixelsize[2] = 2;
         break;
     case V4L2_PIX_FMT_NV24:
     case V4L2_PIX_FMT_NV42:
         tpg->twopixelsize[0] = 2;
         tpg->twopixelsize[1] = 4;
         break;
     }
     return true;
 }
 EXPORT_SYMBOL_GPL(tpg_s_fourcc);
 
 void tpg_s_crop_compose(struct tpg_data *tpg, const struct v4l2_rect *crop,
         const struct v4l2_rect *compose)
 {
     tpg->crop = *crop;
     tpg->compose = *compose;
     tpg->scaled_width = (tpg->src_width * tpg->compose.width +
                  tpg->crop.width - 1) / tpg->crop.width;
     tpg->scaled_width &= ~1;
     if (tpg->scaled_width > tpg->max_line_width)
         tpg->scaled_width = tpg->max_line_width;
     if (tpg->scaled_width < 2)
         tpg->scaled_width = 2;
     tpg->recalc_lines = true;
 }
 EXPORT_SYMBOL_GPL(tpg_s_crop_compose);
 
 void tpg_reset_source(struct tpg_data *tpg, unsigned width, unsigned height,
                u32 field)
 {
     unsigned p;
 
     tpg->src_width = width;
     tpg->src_height = height;
     tpg->field = field;
     tpg->buf_height = height;
     if (V4L2_FIELD_HAS_T_OR_B(field))
         tpg->buf_height /= 2;
     tpg->scaled_width = width;
     tpg->crop.top = tpg->crop.left = 0;
     tpg->crop.width = width;
     tpg->crop.height = height;
     tpg->compose.top = tpg->compose.left = 0;
     tpg->compose.width = width;
     tpg->compose.height = tpg->buf_height;
     for (p = 0; p < tpg->planes; p++)
         tpg->bytesperline[p] = (width * tpg->twopixelsize[p]) /
                        (2 * tpg->hdownsampling[p]);
     tpg->recalc_square_border = true;
 }
 EXPORT_SYMBOL_GPL(tpg_reset_source);
 
 static enum tpg_color tpg_get_textbg_color(struct tpg_data *tpg)
 {
     switch (tpg->pattern) {
     case TPG_PAT_BLACK:
         return TPG_COLOR_100_WHITE;
     case TPG_PAT_CSC_COLORBAR:
         return TPG_COLOR_CSC_BLACK;
     default:
         return TPG_COLOR_100_BLACK;
     }
 }
 
 static enum tpg_color tpg_get_textfg_color(struct tpg_data *tpg)
 {
     switch (tpg->pattern) {
     case TPG_PAT_75_COLORBAR:
     case TPG_PAT_CSC_COLORBAR:
         return TPG_COLOR_CSC_WHITE;
     case TPG_PAT_BLACK:
         return TPG_COLOR_100_BLACK;
     default:
         return TPG_COLOR_100_WHITE;
     }
 }
 
 static inline int rec709_to_linear(int v)
 {
     v = clamp(v, 0, 0xff0);
     return tpg_rec709_to_linear[v];
 }
 
 static inline int linear_to_rec709(int v)
 {
     v = clamp(v, 0, 0xff0);
     return tpg_linear_to_rec709[v];
 }
 
 static void color_to_hsv(struct tpg_data *tpg, int r, int g, int b,
                int *h, int *s, int *v)
 {
     int max_rgb, min_rgb, diff_rgb;
     int aux;
     int third;
     int third_size;
 
     r >>= 4;
     g >>= 4;
     b >>= 4;
 
     /* Value */
     max_rgb = max3(r, g, b);
     *v = max_rgb;
     if (!max_rgb) {
         *h = 0;
         *s = 0;
         return;
     }
 
     /* Saturation */
     min_rgb = min3(r, g, b);
     diff_rgb = max_rgb - min_rgb;
     aux = 255 * diff_rgb;
     aux += max_rgb / 2;
     aux /= max_rgb;
     *s = aux;
     if (!aux) {
         *h = 0;
         return;
     }
 
     third_size = (tpg->real_hsv_enc == V4L2_HSV_ENC_180) ? 60 : 85;
 
     /* Hue */
     if (max_rgb == r) {
         aux =  g - b;
         third = 0;
     } else if (max_rgb == g) {
         aux =  b - r;
         third = third_size;
     } else {
         aux =  r - g;
         third = third_size * 2;
     }
 
     aux *= third_size / 2;
     aux += diff_rgb / 2;
     aux /= diff_rgb;
     aux += third;
 
     /* Clamp Hue */
     if (tpg->real_hsv_enc == V4L2_HSV_ENC_180) {
         if (aux < 0)
             aux += 180;
         else if (aux > 180)
             aux -= 180;
     } else {
         aux = aux & 0xff;
     }
 
     *h = aux;
 }
 
 static void rgb2ycbcr(const int m[3][3], int r, int g, int b,
             int y_offset, int *y, int *cb, int *cr)
 {
     *y  = ((m[0][0] * r + m[0][1] * g + m[0][2] * b) >> 16) + (y_offset << 4);
     *cb = ((m[1][0] * r + m[1][1] * g + m[1][2] * b) >> 16) + (128 << 4);
     *cr = ((m[2][0] * r + m[2][1] * g + m[2][2] * b) >> 16) + (128 << 4);
 }
 
 static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b,
                int *y, int *cb, int *cr)
 {
 #define COEFF(v, r) ((int)(0.5 + (v) * (r) * 256.0))
 
     static const int bt601[3][3] = {
         { COEFF(0.299, 219),   COEFF(0.587, 219),   COEFF(0.114, 219)   },
         { COEFF(-0.1687, 224), COEFF(-0.3313, 224), COEFF(0.5, 224)     },
         { COEFF(0.5, 224),     COEFF(-0.4187, 224), COEFF(-0.0813, 224) },
     };
     static const int bt601_full[3][3] = {
         { COEFF(0.299, 255),   COEFF(0.587, 255),   COEFF(0.114, 255)   },
         { COEFF(-0.1687, 255), COEFF(-0.3313, 255), COEFF(0.5, 255)     },
         { COEFF(0.5, 255),     COEFF(-0.4187, 255), COEFF(-0.0813, 255) },
     };
     static const int rec709[3][3] = {
         { COEFF(0.2126, 219),  COEFF(0.7152, 219),  COEFF(0.0722, 219)  },
         { COEFF(-0.1146, 224), COEFF(-0.3854, 224), COEFF(0.5, 224)     },
         { COEFF(0.5, 224),     COEFF(-0.4542, 224), COEFF(-0.0458, 224) },
     };
     static const int rec709_full[3][3] = {
         { COEFF(0.2126, 255),  COEFF(0.7152, 255),  COEFF(0.0722, 255)  },
         { COEFF(-0.1146, 255), COEFF(-0.3854, 255), COEFF(0.5, 255)     },
         { COEFF(0.5, 255),     COEFF(-0.4542, 255), COEFF(-0.0458, 255) },
     };
     static const int smpte240m[3][3] = {
         { COEFF(0.212, 219),  COEFF(0.701, 219),  COEFF(0.087, 219)  },
         { COEFF(-0.116, 224), COEFF(-0.384, 224), COEFF(0.5, 224)    },
         { COEFF(0.5, 224),    COEFF(-0.445, 224), COEFF(-0.055, 224) },
     };
     static const int smpte240m_full[3][3] = {
         { COEFF(0.212, 255),  COEFF(0.701, 255),  COEFF(0.087, 255)  },
         { COEFF(-0.116, 255), COEFF(-0.384, 255), COEFF(0.5, 255)    },
         { COEFF(0.5, 255),    COEFF(-0.445, 255), COEFF(-0.055, 255) },
     };
     static const int bt2020[3][3] = {
         { COEFF(0.2627, 219),  COEFF(0.6780, 219),  COEFF(0.0593, 219)  },
         { COEFF(-0.1396, 224), COEFF(-0.3604, 224), COEFF(0.5, 224)     },
         { COEFF(0.5, 224),     COEFF(-0.4598, 224), COEFF(-0.0402, 224) },
     };
     static const int bt2020_full[3][3] = {
         { COEFF(0.2627, 255),  COEFF(0.6780, 255),  COEFF(0.0593, 255)  },
         { COEFF(-0.1396, 255), COEFF(-0.3604, 255), COEFF(0.5, 255)     },
         { COEFF(0.5, 255),     COEFF(-0.4598, 255), COEFF(-0.0402, 255) },
     };
     static const int bt2020c[4] = {
         COEFF(1.0 / 1.9404, 224), COEFF(1.0 / 1.5816, 224),
         COEFF(1.0 / 1.7184, 224), COEFF(1.0 / 0.9936, 224),
     };
     static const int bt2020c_full[4] = {
         COEFF(1.0 / 1.9404, 255), COEFF(1.0 / 1.5816, 255),
         COEFF(1.0 / 1.7184, 255), COEFF(1.0 / 0.9936, 255),
     };
 
     bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE;
     unsigned y_offset = full ? 0 : 16;
     int lin_y, yc;
 
     switch (tpg->real_ycbcr_enc) {
     case V4L2_YCBCR_ENC_601:
         rgb2ycbcr(full ? bt601_full : bt601, r, g, b, y_offset, y, cb, cr);
         break;
     case V4L2_YCBCR_ENC_XV601:
         /* Ignore quantization range, there is only one possible
          * Y'CbCr encoding. */
         rgb2ycbcr(bt601, r, g, b, 16, y, cb, cr);
         break;
     case V4L2_YCBCR_ENC_XV709:
         /* Ignore quantization range, there is only one possible
          * Y'CbCr encoding. */
         rgb2ycbcr(rec709, r, g, b, 16, y, cb, cr);
         break;
     case V4L2_YCBCR_ENC_BT2020:
         rgb2ycbcr(full ? bt2020_full : bt2020, r, g, b, y_offset, y, cb, cr);
         break;
     case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
         lin_y = (COEFF(0.2627, 255) * rec709_to_linear(r) +
              COEFF(0.6780, 255) * rec709_to_linear(g) +
              COEFF(0.0593, 255) * rec709_to_linear(b)) >> 16;
         yc = linear_to_rec709(lin_y);
         *y = full ? yc : (yc * 219) / 255 + (16 << 4);
         if (b <= yc)
             *cb = (((b - yc) * (full ? bt2020c_full[0] : bt2020c[0])) >> 16) + (128 << 4);
         else
             *cb = (((b - yc) * (full ? bt2020c_full[1] : bt2020c[1])) >> 16) + (128 << 4);
         if (r <= yc)
             *cr = (((r - yc) * (full ? bt2020c_full[2] : bt2020c[2])) >> 16) + (128 << 4);
         else
             *cr = (((r - yc) * (full ? bt2020c_full[3] : bt2020c[3])) >> 16) + (128 << 4);
         break;
     case V4L2_YCBCR_ENC_SMPTE240M:
         rgb2ycbcr(full ? smpte240m_full : smpte240m, r, g, b, y_offset, y, cb, cr);
         break;
     case V4L2_YCBCR_ENC_709:
     default:
         rgb2ycbcr(full ? rec709_full : rec709, r, g, b, y_offset, y, cb, cr);
         break;
     }
 }
 
 static void ycbcr2rgb(const int m[3][3], int y, int cb, int cr,
             int y_offset, int *r, int *g, int *b)
 {
     y -= y_offset << 4;
     cb -= 128 << 4;
     cr -= 128 << 4;
     *r = m[0][0] * y + m[0][1] * cb + m[0][2] * cr;
     *g = m[1][0] * y + m[1][1] * cb + m[1][2] * cr;
     *b = m[2][0] * y + m[2][1] * cb + m[2][2] * cr;
     *r = clamp(*r >> 12, 0, 0xff0);
     *g = clamp(*g >> 12, 0, 0xff0);
     *b = clamp(*b >> 12, 0, 0xff0);
 }
 
 static void ycbcr_to_color(struct tpg_data *tpg, int y, int cb, int cr,
                int *r, int *g, int *b)
 {
 #undef COEFF
 #define COEFF(v, r) ((int)(0.5 + (v) * ((255.0 * 255.0 * 16.0) / (r))))
     static const int bt601[3][3] = {
         { COEFF(1, 219), COEFF(0, 224),       COEFF(1.4020, 224)  },
         { COEFF(1, 219), COEFF(-0.3441, 224), COEFF(-0.7141, 224) },
         { COEFF(1, 219), COEFF(1.7720, 224),  COEFF(0, 224)       },
     };
     static const int bt601_full[3][3] = {
         { COEFF(1, 255), COEFF(0, 255),       COEFF(1.4020, 255)  },
         { COEFF(1, 255), COEFF(-0.3441, 255), COEFF(-0.7141, 255) },
         { COEFF(1, 255), COEFF(1.7720, 255),  COEFF(0, 255)       },
     };
     static const int rec709[3][3] = {
         { COEFF(1, 219), COEFF(0, 224),       COEFF(1.5748, 224)  },
         { COEFF(1, 219), COEFF(-0.1873, 224), COEFF(-0.4681, 224) },
         { COEFF(1, 219), COEFF(1.8556, 224),  COEFF(0, 224)       },
     };
     static const int rec709_full[3][3] = {
         { COEFF(1, 255), COEFF(0, 255),       COEFF(1.5748, 255)  },
         { COEFF(1, 255), COEFF(-0.1873, 255), COEFF(-0.4681, 255) },
         { COEFF(1, 255), COEFF(1.8556, 255),  COEFF(0, 255)       },
     };
     static const int smpte240m[3][3] = {
         { COEFF(1, 219), COEFF(0, 224),       COEFF(1.5756, 224)  },
         { COEFF(1, 219), COEFF(-0.2253, 224), COEFF(-0.4767, 224) },
         { COEFF(1, 219), COEFF(1.8270, 224),  COEFF(0, 224)       },
     };
     static const int smpte240m_full[3][3] = {
         { COEFF(1, 255), COEFF(0, 255),       COEFF(1.5756, 255)  },
         { COEFF(1, 255), COEFF(-0.2253, 255), COEFF(-0.4767, 255) },
         { COEFF(1, 255), COEFF(1.8270, 255),  COEFF(0, 255)       },
     };
     static const int bt2020[3][3] = {
         { COEFF(1, 219), COEFF(0, 224),       COEFF(1.4746, 224)  },
         { COEFF(1, 219), COEFF(-0.1646, 224), COEFF(-0.5714, 224) },
         { COEFF(1, 219), COEFF(1.8814, 224),  COEFF(0, 224)       },
     };
     static const int bt2020_full[3][3] = {
         { COEFF(1, 255), COEFF(0, 255),       COEFF(1.4746, 255)  },
         { COEFF(1, 255), COEFF(-0.1646, 255), COEFF(-0.5714, 255) },
         { COEFF(1, 255), COEFF(1.8814, 255),  COEFF(0, 255)       },
     };
     static const int bt2020c[4] = {
         COEFF(1.9404, 224), COEFF(1.5816, 224),
         COEFF(1.7184, 224), COEFF(0.9936, 224),
     };
     static const int bt2020c_full[4] = {
         COEFF(1.9404, 255), COEFF(1.5816, 255),
         COEFF(1.7184, 255), COEFF(0.9936, 255),
     };
 
     bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE;
     unsigned y_offset = full ? 0 : 16;
     int y_fac = full ? COEFF(1.0, 255) : COEFF(1.0, 219);
     int lin_r, lin_g, lin_b, lin_y;
 
     switch (tpg->real_ycbcr_enc) {
     case V4L2_YCBCR_ENC_601:
         ycbcr2rgb(full ? bt601_full : bt601, y, cb, cr, y_offset, r, g, b);
         break;
     case V4L2_YCBCR_ENC_XV601:
         /* Ignore quantization range, there is only one possible
          * Y'CbCr encoding. */
         ycbcr2rgb(bt601, y, cb, cr, 16, r, g, b);
         break;
     case V4L2_YCBCR_ENC_XV709:
         /* Ignore quantization range, there is only one possible
          * Y'CbCr encoding. */
         ycbcr2rgb(rec709, y, cb, cr, 16, r, g, b);
         break;
     case V4L2_YCBCR_ENC_BT2020:
         ycbcr2rgb(full ? bt2020_full : bt2020, y, cb, cr, y_offset, r, g, b);
         break;
     case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
         y -= full ? 0 : 16 << 4;
         cb -= 128 << 4;
         cr -= 128 << 4;
 
         if (cb <= 0)
             *b = y_fac * y + (full ? bt2020c_full[0] : bt2020c[0]) * cb;
         else
             *b = y_fac * y + (full ? bt2020c_full[1] : bt2020c[1]) * cb;
         *b = *b >> 12;
         if (cr <= 0)
             *r = y_fac * y + (full ? bt2020c_full[2] : bt2020c[2]) * cr;
         else
             *r = y_fac * y + (full ? bt2020c_full[3] : bt2020c[3]) * cr;
         *r = *r >> 12;
         lin_r = rec709_to_linear(*r);
         lin_b = rec709_to_linear(*b);
         lin_y = rec709_to_linear((y * 255) / (full ? 255 : 219));
 
         lin_g = COEFF(1.0 / 0.6780, 255) * lin_y -
             COEFF(0.2627 / 0.6780, 255) * lin_r -
             COEFF(0.0593 / 0.6780, 255) * lin_b;
         *g = linear_to_rec709(lin_g >> 12);
         break;
     case V4L2_YCBCR_ENC_SMPTE240M:
         ycbcr2rgb(full ? smpte240m_full : smpte240m, y, cb, cr, y_offset, r, g, b);
         break;
     case V4L2_YCBCR_ENC_709:
     default:
         ycbcr2rgb(full ? rec709_full : rec709, y, cb, cr, y_offset, r, g, b);
         break;
     }
 }
 
 /* precalculate color bar values to speed up rendering */
 static void precalculate_color(struct tpg_data *tpg, int k)
 {
     int col = k;
     int r = tpg_colors[col].r;
     int g = tpg_colors[col].g;
     int b = tpg_colors[col].b;
     int y, cb, cr;
     bool ycbcr_valid = false;
 
     if (k == TPG_COLOR_TEXTBG) {
         col = tpg_get_textbg_color(tpg);
 
         r = tpg_colors[col].r;
         g = tpg_colors[col].g;
         b = tpg_colors[col].b;
     } else if (k == TPG_COLOR_TEXTFG) {
         col = tpg_get_textfg_color(tpg);
 
         r = tpg_colors[col].r;
         g = tpg_colors[col].g;
         b = tpg_colors[col].b;
     } else if (tpg->pattern == TPG_PAT_NOISE) {
         r = g = b = prandom_u32_max(256);
     } else if (k == TPG_COLOR_RANDOM) {
         r = g = b = tpg->qual_offset + prandom_u32_max(196);
     } else if (k >= TPG_COLOR_RAMP) {
         r = g = b = k - TPG_COLOR_RAMP;
     }
 
     if (tpg->pattern == TPG_PAT_CSC_COLORBAR && col <= TPG_COLOR_CSC_BLACK) {
         r = tpg_csc_colors[tpg->colorspace][tpg->real_xfer_func][col].r;
         g = tpg_csc_colors[tpg->colorspace][tpg->real_xfer_func][col].g;
         b = tpg_csc_colors[tpg->colorspace][tpg->real_xfer_func][col].b;
     } else {
         r <<= 4;
         g <<= 4;
         b <<= 4;
     }
 
     if (tpg->qual == TPG_QUAL_GRAY ||
         tpg->color_enc ==  TGP_COLOR_ENC_LUMA) {
         /* Rec. 709 Luma function */
         /* (0.2126, 0.7152, 0.0722) * (255 * 256) */
         r = g = b = (13879 * r + 46688 * g + 4713 * b) >> 16;
     }
 
     /*
      * The assumption is that the RGB output is always full range,
      * so only if the rgb_range overrides the 'real' rgb range do
      * we need to convert the RGB values.
      *
      * Remember that r, g and b are still in the 0 - 0xff0 range.
      */
     if (tpg->real_rgb_range == V4L2_DV_RGB_RANGE_LIMITED &&
         tpg->rgb_range == V4L2_DV_RGB_RANGE_FULL &&
         tpg->color_enc == TGP_COLOR_ENC_RGB) {
         /*
          * Convert from full range (which is what r, g and b are)
          * to limited range (which is the 'real' RGB range), which
          * is then interpreted as full range.
          */
         r = (r * 219) / 255 + (16 << 4);
         g = (g * 219) / 255 + (16 << 4);
         b = (b * 219) / 255 + (16 << 4);
     } else if (tpg->real_rgb_range != V4L2_DV_RGB_RANGE_LIMITED &&
            tpg->rgb_range == V4L2_DV_RGB_RANGE_LIMITED &&
            tpg->color_enc == TGP_COLOR_ENC_RGB) {
 
         /*
          * Clamp r, g and b to the limited range and convert to full
          * range since that's what we deliver.
          */
         r = clamp(r, 16 << 4, 235 << 4);
         g = clamp(g, 16 << 4, 235 << 4);
         b = clamp(b, 16 << 4, 235 << 4);
         r = (r - (16 << 4)) * 255 / 219;
         g = (g - (16 << 4)) * 255 / 219;
         b = (b - (16 << 4)) * 255 / 219;
     }
 
     if ((tpg->brightness != 128 || tpg->contrast != 128 ||
          tpg->saturation != 128 || tpg->hue) &&
         tpg->color_enc != TGP_COLOR_ENC_LUMA) {
         /* Implement these operations */
         int tmp_cb, tmp_cr;
 
         /* First convert to YCbCr */
 
         color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
 
         y = (16 << 4) + ((y - (16 << 4)) * tpg->contrast) / 128;
         y += (tpg->brightness << 4) - (128 << 4);
 
         cb -= 128 << 4;
         cr -= 128 << 4;
         tmp_cb = (cb * cos(128 + tpg->hue)) / 127 + (cr * sin[128 + tpg->hue]) / 127;
         tmp_cr = (cr * cos(128 + tpg->hue)) / 127 - (cb * sin[128 + tpg->hue]) / 127;
 
         cb = (128 << 4) + (tmp_cb * tpg->contrast * tpg->saturation) / (128 * 128);
         cr = (128 << 4) + (tmp_cr * tpg->contrast * tpg->saturation) / (128 * 128);
         if (tpg->color_enc == TGP_COLOR_ENC_YCBCR)
             ycbcr_valid = true;
         else
             ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
     } else if ((tpg->brightness != 128 || tpg->contrast != 128) &&
            tpg->color_enc == TGP_COLOR_ENC_LUMA) {
         r = (16 << 4) + ((r - (16 << 4)) * tpg->contrast) / 128;
         r += (tpg->brightness << 4) - (128 << 4);
     }
 
     switch (tpg->color_enc) {
     case TGP_COLOR_ENC_HSV:
     {
         int h, s, v;
 
         color_to_hsv(tpg, r, g, b, &h, &s, &v);
         tpg->colors[k][0] = h;
         tpg->colors[k][1] = s;
         tpg->colors[k][2] = v;
         break;
     }
     case TGP_COLOR_ENC_YCBCR:
     {
         /* Convert to YCbCr */
         if (!ycbcr_valid)
             color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
 
         y >>= 4;
         cb >>= 4;
         cr >>= 4;
         /*
          * XV601/709 use the header/footer margins to encode R', G'
          * and B' values outside the range [0-1]. So do not clamp
          * XV601/709 values.
          */
         if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE &&
             tpg->real_ycbcr_enc != V4L2_YCBCR_ENC_XV601 &&
             tpg->real_ycbcr_enc != V4L2_YCBCR_ENC_XV709) {
             y = clamp(y, 16, 235);
             cb = clamp(cb, 16, 240);
             cr = clamp(cr, 16, 240);
         } else {
             y = clamp(y, 1, 254);
             cb = clamp(cb, 1, 254);
             cr = clamp(cr, 1, 254);
         }
         switch (tpg->fourcc) {
         case V4L2_PIX_FMT_YUV444:
             y >>= 4;
             cb >>= 4;
             cr >>= 4;
             break;
         case V4L2_PIX_FMT_YUV555:
             y >>= 3;
             cb >>= 3;
             cr >>= 3;
             break;
         case V4L2_PIX_FMT_YUV565:
             y >>= 3;
             cb >>= 2;
             cr >>= 3;
             break;
         }
         tpg->colors[k][0] = y;
         tpg->colors[k][1] = cb;
         tpg->colors[k][2] = cr;
         break;
     }
     case TGP_COLOR_ENC_LUMA:
     {
         tpg->colors[k][0] = r >> 4;
         break;
     }
     case TGP_COLOR_ENC_RGB:
     {
         if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
             r = (r * 219) / 255 + (16 << 4);
             g = (g * 219) / 255 + (16 << 4);
             b = (b * 219) / 255 + (16 << 4);
         }
         switch (tpg->fourcc) {
         case V4L2_PIX_FMT_RGB332:
             r >>= 9;
             g >>= 9;
             b >>= 10;
             break;
         case V4L2_PIX_FMT_RGB565:
         case V4L2_PIX_FMT_RGB565X:
             r >>= 7;
             g >>= 6;
             b >>= 7;
             break;
         case V4L2_PIX_FMT_RGB444:
         case V4L2_PIX_FMT_XRGB444:
         case V4L2_PIX_FMT_ARGB444:
         case V4L2_PIX_FMT_RGBX444:
         case V4L2_PIX_FMT_RGBA444:
         case V4L2_PIX_FMT_XBGR444:
         case V4L2_PIX_FMT_ABGR444:
         case V4L2_PIX_FMT_BGRX444:
         case V4L2_PIX_FMT_BGRA444:
             r >>= 8;
             g >>= 8;
             b >>= 8;
             break;
         case V4L2_PIX_FMT_RGB555:
         case V4L2_PIX_FMT_XRGB555:
         case V4L2_PIX_FMT_ARGB555:
         case V4L2_PIX_FMT_RGBX555:
         case V4L2_PIX_FMT_RGBA555:
         case V4L2_PIX_FMT_XBGR555:
         case V4L2_PIX_FMT_ABGR555:
         case V4L2_PIX_FMT_BGRX555:
         case V4L2_PIX_FMT_BGRA555:
         case V4L2_PIX_FMT_RGB555X:
         case V4L2_PIX_FMT_XRGB555X:
         case V4L2_PIX_FMT_ARGB555X:
             r >>= 7;
             g >>= 7;
             b >>= 7;
             break;
         case V4L2_PIX_FMT_BGR666:
             r >>= 6;
             g >>= 6;
             b >>= 6;
             break;
         default:
             r >>= 4;
             g >>= 4;
             b >>= 4;
             break;
         }
 
         tpg->colors[k][0] = r;
         tpg->colors[k][1] = g;
         tpg->colors[k][2] = b;
         break;
     }
     }
 }
 
 static void tpg_precalculate_colors(struct tpg_data *tpg)
 {
     int k;
 
     for (k = 0; k < TPG_COLOR_MAX; k++)
         precalculate_color(tpg, k);
 }
 
 /* 'odd' is true for pixels 1, 3, 5, etc. and false for pixels 0, 2, 4, etc. */
 static void gen_twopix(struct tpg_data *tpg,
         u8 buf[TPG_MAX_PLANES][8], int color, bool odd)
 {
     unsigned offset = odd * tpg->twopixelsize[0] / 2;
     u8 alpha = tpg->alpha_component;
     u8 r_y_h, g_u_s, b_v;
 
     if (tpg->alpha_red_only && color != TPG_COLOR_CSC_RED &&
                    color != TPG_COLOR_100_RED &&
                    color != TPG_COLOR_75_RED)
         alpha = 0;
     if (color == TPG_COLOR_RANDOM)
         precalculate_color(tpg, color);
     r_y_h = tpg->colors[color][0]; /* R or precalculated Y, H */
     g_u_s = tpg->colors[color][1]; /* G or precalculated U, V */
     b_v = tpg->colors[color][2]; /* B or precalculated V */
 
     switch (tpg->fourcc) {
     case V4L2_PIX_FMT_GREY:
         buf[0][offset] = r_y_h;
         break;
     case V4L2_PIX_FMT_Y10:
         buf[0][offset] = (r_y_h << 2) & 0xff;
         buf[0][offset+1] = r_y_h >> 6;
         break;
     case V4L2_PIX_FMT_Y12:
         buf[0][offset] = (r_y_h << 4) & 0xff;
         buf[0][offset+1] = r_y_h >> 4;
         break;
     case V4L2_PIX_FMT_Y16:
     case V4L2_PIX_FMT_Z16:
         /*
          * Ideally both bytes should be set to r_y_h, but then you won't
          * be able to detect endian problems. So keep it 0 except for
          * the corner case where r_y_h is 0xff so white really will be
          * white (0xffff).
          */
         buf[0][offset] = r_y_h == 0xff ? r_y_h : 0;
         buf[0][offset+1] = r_y_h;
         break;
     case V4L2_PIX_FMT_Y16_BE:
         /* See comment for V4L2_PIX_FMT_Y16 above */
         buf[0][offset] = r_y_h;
         buf[0][offset+1] = r_y_h == 0xff ? r_y_h : 0;
         break;
     case V4L2_PIX_FMT_YUV422M:
     case V4L2_PIX_FMT_YUV422P:
     case V4L2_PIX_FMT_YUV420:
     case V4L2_PIX_FMT_YUV420M:
         buf[0][offset] = r_y_h;
         if (odd) {
             buf[1][0] = (buf[1][0] + g_u_s) / 2;
             buf[2][0] = (buf[2][0] + b_v) / 2;
             buf[1][1] = buf[1][0];
             buf[2][1] = buf[2][0];
             break;
         }
         buf[1][0] = g_u_s;
         buf[2][0] = b_v;
         break;
     case V4L2_PIX_FMT_YVU422M:
     case V4L2_PIX_FMT_YVU420:
     case V4L2_PIX_FMT_YVU420M:
         buf[0][offset] = r_y_h;
         if (odd) {
             buf[1][0] = (buf[1][0] + b_v) / 2;
             buf[2][0] = (buf[2][0] + g_u_s) / 2;
             buf[1][1] = buf[1][0];
             buf[2][1] = buf[2][0];
             break;
         }
         buf[1][0] = b_v;
         buf[2][0] = g_u_s;
         break;
 
     case V4L2_PIX_FMT_NV12:
     case V4L2_PIX_FMT_NV12M:
     case V4L2_PIX_FMT_NV16:
     case V4L2_PIX_FMT_NV16M:
         buf[0][offset] = r_y_h;
         if (odd) {
             buf[1][0] = (buf[1][0] + g_u_s) / 2;
             buf[1][1] = (buf[1][1] + b_v) / 2;
             break;
         }
         buf[1][0] = g_u_s;
         buf[1][1] = b_v;
         break;
     case V4L2_PIX_FMT_NV21:
     case V4L2_PIX_FMT_NV21M:
     case V4L2_PIX_FMT_NV61:
     case V4L2_PIX_FMT_NV61M:
         buf[0][offset] = r_y_h;
         if (odd) {
             buf[1][0] = (buf[1][0] + b_v) / 2;
             buf[1][1] = (buf[1][1] + g_u_s) / 2;
             break;
         }
         buf[1][0] = b_v;
         buf[1][1] = g_u_s;
         break;
 
     case V4L2_PIX_FMT_YUV444M:
         buf[0][offset] = r_y_h;
         buf[1][offset] = g_u_s;
         buf[2][offset] = b_v;
         break;
 
     case V4L2_PIX_FMT_YVU444M:
         buf[0][offset] = r_y_h;
         buf[1][offset] = b_v;
         buf[2][offset] = g_u_s;
         break;
 
     case V4L2_PIX_FMT_NV24:
         buf[0][offset] = r_y_h;
         buf[1][2 * offset] = g_u_s;
         buf[1][(2 * offset + 1) % 8] = b_v;
         break;
 
     case V4L2_PIX_FMT_NV42:
         buf[0][offset] = r_y_h;
         buf[1][2 * offset] = b_v;
         buf[1][(2 * offset + 1) % 8] = g_u_s;
         break;
 
     case V4L2_PIX_FMT_YUYV:
         buf[0][offset] = r_y_h;
         if (odd) {
             buf[0][1] = (buf[0][1] + g_u_s) / 2;
             buf[0][3] = (buf[0][3] + b_v) / 2;
             break;
         }
         buf[0][1] = g_u_s;
         buf[0][3] = b_v;
         break;
     case V4L2_PIX_FMT_UYVY:
         buf[0][offset + 1] = r_y_h;
         if (odd) {
             buf[0][0] = (buf[0][0] + g_u_s) / 2;
             buf[0][2] = (buf[0][2] + b_v) / 2;
             break;
         }
         buf[0][0] = g_u_s;
         buf[0][2] = b_v;
         break;
     case V4L2_PIX_FMT_YVYU:
         buf[0][offset] = r_y_h;
         if (odd) {
             buf[0][1] = (buf[0][1] + b_v) / 2;
             buf[0][3] = (buf[0][3] + g_u_s) / 2;
             break;
         }
         buf[0][1] = b_v;
         buf[0][3] = g_u_s;
         break;
     case V4L2_PIX_FMT_VYUY:
         buf[0][offset + 1] = r_y_h;
         if (odd) {
             buf[0][0] = (buf[0][0] + b_v) / 2;
             buf[0][2] = (buf[0][2] + g_u_s) / 2;
             break;
         }
         buf[0][0] = b_v;
         buf[0][2] = g_u_s;
         break;
     case V4L2_PIX_FMT_RGB332:
         buf[0][offset] = (r_y_h << 5) | (g_u_s << 2) | b_v;
         break;
     case V4L2_PIX_FMT_YUV565:
     case V4L2_PIX_FMT_RGB565:
         buf[0][offset] = (g_u_s << 5) | b_v;
         buf[0][offset + 1] = (r_y_h << 3) | (g_u_s >> 3);
         break;
     case V4L2_PIX_FMT_RGB565X:
         buf[0][offset] = (r_y_h << 3) | (g_u_s >> 3);
         buf[0][offset + 1] = (g_u_s << 5) | b_v;
         break;
     case V4L2_PIX_FMT_RGB444:
     case V4L2_PIX_FMT_XRGB444:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_YUV444:
     case V4L2_PIX_FMT_ARGB444:
         buf[0][offset] = (g_u_s << 4) | b_v;
         buf[0][offset + 1] = (alpha & 0xf0) | r_y_h;
         break;
     case V4L2_PIX_FMT_RGBX444:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_RGBA444:
         buf[0][offset] = (b_v << 4) | (alpha >> 4);
         buf[0][offset + 1] = (r_y_h << 4) | g_u_s;
         break;
     case V4L2_PIX_FMT_XBGR444:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_ABGR444:
         buf[0][offset] = (g_u_s << 4) | r_y_h;
         buf[0][offset + 1] = (alpha & 0xf0) | b_v;
         break;
     case V4L2_PIX_FMT_BGRX444:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_BGRA444:
         buf[0][offset] = (r_y_h << 4) | (alpha >> 4);
         buf[0][offset + 1] = (b_v << 4) | g_u_s;
         break;
     case V4L2_PIX_FMT_RGB555:
     case V4L2_PIX_FMT_XRGB555:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_YUV555:
     case V4L2_PIX_FMT_ARGB555:
         buf[0][offset] = (g_u_s << 5) | b_v;
         buf[0][offset + 1] = (alpha & 0x80) | (r_y_h << 2)
                             | (g_u_s >> 3);
         break;
     case V4L2_PIX_FMT_RGBX555:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_RGBA555:
         buf[0][offset] = (g_u_s << 6) | (b_v << 1) |
                  ((alpha & 0x80) >> 7);
         buf[0][offset + 1] = (r_y_h << 3) | (g_u_s >> 2);
         break;
     case V4L2_PIX_FMT_XBGR555:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_ABGR555:
         buf[0][offset] = (g_u_s << 5) | r_y_h;
         buf[0][offset + 1] = (alpha & 0x80) | (b_v << 2)
                             | (g_u_s >> 3);
         break;
     case V4L2_PIX_FMT_BGRX555:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_BGRA555:
         buf[0][offset] = (g_u_s << 6) | (r_y_h << 1) |
                  ((alpha & 0x80) >> 7);
         buf[0][offset + 1] = (b_v << 3) | (g_u_s >> 2);
         break;
     case V4L2_PIX_FMT_RGB555X:
     case V4L2_PIX_FMT_XRGB555X:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_ARGB555X:
         buf[0][offset] = (alpha & 0x80) | (r_y_h << 2) | (g_u_s >> 3);
         buf[0][offset + 1] = (g_u_s << 5) | b_v;
         break;
     case V4L2_PIX_FMT_RGB24:
     case V4L2_PIX_FMT_HSV24:
         buf[0][offset] = r_y_h;
         buf[0][offset + 1] = g_u_s;
         buf[0][offset + 2] = b_v;
         break;
     case V4L2_PIX_FMT_BGR24:
         buf[0][offset] = b_v;
         buf[0][offset + 1] = g_u_s;
         buf[0][offset + 2] = r_y_h;
         break;
     case V4L2_PIX_FMT_BGR666:
         buf[0][offset] = (b_v << 2) | (g_u_s >> 4);
         buf[0][offset + 1] = (g_u_s << 4) | (r_y_h >> 2);
         buf[0][offset + 2] = r_y_h << 6;
         buf[0][offset + 3] = 0;
         break;
     case V4L2_PIX_FMT_RGB32:
     case V4L2_PIX_FMT_XRGB32:
     case V4L2_PIX_FMT_HSV32:
     case V4L2_PIX_FMT_XYUV32:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_YUV32:
     case V4L2_PIX_FMT_ARGB32:
     case V4L2_PIX_FMT_AYUV32:
         buf[0][offset] = alpha;
         buf[0][offset + 1] = r_y_h;
         buf[0][offset + 2] = g_u_s;
         buf[0][offset + 3] = b_v;
         break;
     case V4L2_PIX_FMT_RGBX32:
     case V4L2_PIX_FMT_YUVX32:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_RGBA32:
     case V4L2_PIX_FMT_YUVA32:
         buf[0][offset] = r_y_h;
         buf[0][offset + 1] = g_u_s;
         buf[0][offset + 2] = b_v;
         buf[0][offset + 3] = alpha;
         break;
     case V4L2_PIX_FMT_BGR32:
     case V4L2_PIX_FMT_XBGR32:
     case V4L2_PIX_FMT_VUYX32:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_ABGR32:
     case V4L2_PIX_FMT_VUYA32:
         buf[0][offset] = b_v;
         buf[0][offset + 1] = g_u_s;
         buf[0][offset + 2] = r_y_h;
         buf[0][offset + 3] = alpha;
         break;
     case V4L2_PIX_FMT_BGRX32:
         alpha = 0;
         fallthrough;
     case V4L2_PIX_FMT_BGRA32:
         buf[0][offset] = alpha;
         buf[0][offset + 1] = b_v;
         buf[0][offset + 2] = g_u_s;
         buf[0][offset + 3] = r_y_h;
         break;
     case V4L2_PIX_FMT_SBGGR8:
         buf[0][offset] = odd ? g_u_s : b_v;
         buf[1][offset] = odd ? r_y_h : g_u_s;
         break;
     case V4L2_PIX_FMT_SGBRG8:
         buf[0][offset] = odd ? b_v : g_u_s;
         buf[1][offset] = odd ? g_u_s : r_y_h;
         break;
     case V4L2_PIX_FMT_SGRBG8:
         buf[0][offset] = odd ? r_y_h : g_u_s;
         buf[1][offset] = odd ? g_u_s : b_v;
         break;
     case V4L2_PIX_FMT_SRGGB8:
         buf[0][offset] = odd ? g_u_s : r_y_h;
         buf[1][offset] = odd ? b_v : g_u_s;
         break;
     case V4L2_PIX_FMT_SBGGR10:
         buf[0][offset] = odd ? g_u_s << 2 : b_v << 2;
         buf[0][offset + 1] = odd ? g_u_s >> 6 : b_v >> 6;
         buf[1][offset] = odd ? r_y_h << 2 : g_u_s << 2;
         buf[1][offset + 1] = odd ? r_y_h >> 6 : g_u_s >> 6;
         buf[0][offset] |= (buf[0][offset] >> 2) & 3;
         buf[1][offset] |= (buf[1][offset] >> 2) & 3;
         break;
     case V4L2_PIX_FMT_SGBRG10:
         buf[0][offset] = odd ? b_v << 2 : g_u_s << 2;
         buf[0][offset + 1] = odd ? b_v >> 6 : g_u_s >> 6;
         buf[1][offset] = odd ? g_u_s << 2 : r_y_h << 2;
         buf[1][offset + 1] = odd ? g_u_s >> 6 : r_y_h >> 6;
         buf[0][offset] |= (buf[0][offset] >> 2) & 3;
         buf[1][offset] |= (buf[1][offset] >> 2) & 3;
         break;
     case V4L2_PIX_FMT_SGRBG10:
         buf[0][offset] = odd ? r_y_h << 2 : g_u_s << 2;
         buf[0][offset + 1] = odd ? r_y_h >> 6 : g_u_s >> 6;
         buf[1][offset] = odd ? g_u_s << 2 : b_v << 2;
         buf[1][offset + 1] = odd ? g_u_s >> 6 : b_v >> 6;
         buf[0][offset] |= (buf[0][offset] >> 2) & 3;
         buf[1][offset] |= (buf[1][offset] >> 2) & 3;
         break;
     case V4L2_PIX_FMT_SRGGB10:
         buf[0][offset] = odd ? g_u_s << 2 : r_y_h << 2;
         buf[0][offset + 1] = odd ? g_u_s >> 6 : r_y_h >> 6;
         buf[1][offset] = odd ? b_v << 2 : g_u_s << 2;
         buf[1][offset + 1] = odd ? b_v >> 6 : g_u_s >> 6;
         buf[0][offset] |= (buf[0][offset] >> 2) & 3;
         buf[1][offset] |= (buf[1][offset] >> 2) & 3;
         break;
     case V4L2_PIX_FMT_SBGGR12:
         buf[0][offset] = odd ? g_u_s << 4 : b_v << 4;
         buf[0][offset + 1] = odd ? g_u_s >> 4 : b_v >> 4;
         buf[1][offset] = odd ? r_y_h << 4 : g_u_s << 4;
         buf[1][offset + 1] = odd ? r_y_h >> 4 : g_u_s >> 4;
         buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
         buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
         break;
     case V4L2_PIX_FMT_SGBRG12:
         buf[0][offset] = odd ? b_v << 4 : g_u_s << 4;
         buf[0][offset + 1] = odd ? b_v >> 4 : g_u_s >> 4;
         buf[1][offset] = odd ? g_u_s << 4 : r_y_h << 4;
         buf[1][offset + 1] = odd ? g_u_s >> 4 : r_y_h >> 4;
         buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
         buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
         break;
     case V4L2_PIX_FMT_SGRBG12:
         buf[0][offset] = odd ? r_y_h << 4 : g_u_s << 4;
         buf[0][offset + 1] = odd ? r_y_h >> 4 : g_u_s >> 4;
         buf[1][offset] = odd ? g_u_s << 4 : b_v << 4;
         buf[1][offset + 1] = odd ? g_u_s >> 4 : b_v >> 4;
         buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
         buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
         break;
     case V4L2_PIX_FMT_SRGGB12:
         buf[0][offset] = odd ? g_u_s << 4 : r_y_h << 4;
         buf[0][offset + 1] = odd ? g_u_s >> 4 : r_y_h >> 4;
         buf[1][offset] = odd ? b_v << 4 : g_u_s << 4;
         buf[1][offset + 1] = odd ? b_v >> 4 : g_u_s >> 4;
         buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
         buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
         break;
     case V4L2_PIX_FMT_SBGGR16:
         buf[0][offset] = buf[0][offset + 1] = odd ? g_u_s : b_v;
         buf[1][offset] = buf[1][offset + 1] = odd ? r_y_h : g_u_s;
         break;
     case V4L2_PIX_FMT_SGBRG16:
         buf[0][offset] = buf[0][offset + 1] = odd ? b_v : g_u_s;
         buf[1][offset] = buf[1][offset + 1] = odd ? g_u_s : r_y_h;
         break;
     case V4L2_PIX_FMT_SGRBG16:
         buf[0][offset] = buf[0][offset + 1] = odd ? r_y_h : g_u_s;
         buf[1][offset] = buf[1][offset + 1] = odd ? g_u_s : b_v;
         break;
     case V4L2_PIX_FMT_SRGGB16:
         buf[0][offset] = buf[0][offset + 1] = odd ? g_u_s : r_y_h;
         buf[1][offset] = buf[1][offset + 1] = odd ? b_v : g_u_s;
         break;
     }
 }
 
 unsigned tpg_g_interleaved_plane(const struct tpg_data *tpg, unsigned buf_line)
 {
     switch (tpg->fourcc) {
     case V4L2_PIX_FMT_SBGGR8:
     case V4L2_PIX_FMT_SGBRG8:
     case V4L2_PIX_FMT_SGRBG8:
     case V4L2_PIX_FMT_SRGGB8:
     case V4L2_PIX_FMT_SBGGR10:
     case V4L2_PIX_FMT_SGBRG10:
     case V4L2_PIX_FMT_SGRBG10:
     case V4L2_PIX_FMT_SRGGB10:
     case V4L2_PIX_FMT_SBGGR12:
     case V4L2_PIX_FMT_SGBRG12:
     case V4L2_PIX_FMT_SGRBG12:
     case V4L2_PIX_FMT_SRGGB12:
     case V4L2_PIX_FMT_SBGGR16:
     case V4L2_PIX_FMT_SGBRG16:
     case V4L2_PIX_FMT_SGRBG16:
     case V4L2_PIX_FMT_SRGGB16:
         return buf_line & 1;
     default:
         return 0;
     }
 }
 EXPORT_SYMBOL_GPL(tpg_g_interleaved_plane);
 
 /* Return how many pattern lines are used by the current pattern. */
 static unsigned tpg_get_pat_lines(const struct tpg_data *tpg)
 {
     switch (tpg->pattern) {
     case TPG_PAT_CHECKERS_16X16:
     case TPG_PAT_CHECKERS_2X2:
     case TPG_PAT_CHECKERS_1X1:
     case TPG_PAT_COLOR_CHECKERS_2X2:
     case TPG_PAT_COLOR_CHECKERS_1X1:
     case TPG_PAT_ALTERNATING_HLINES:
     case TPG_PAT_CROSS_1_PIXEL:
     case TPG_PAT_CROSS_2_PIXELS:
     case TPG_PAT_CROSS_10_PIXELS:
         return 2;
     case TPG_PAT_100_COLORSQUARES:
     case TPG_PAT_100_HCOLORBAR:
         return 8;
     default:
         return 1;
     }
 }
 
 /* Which pattern line should be used for the given frame line. */
 static unsigned tpg_get_pat_line(const struct tpg_data *tpg, unsigned line)
 {
     switch (tpg->pattern) {
     case TPG_PAT_CHECKERS_16X16:
         return (line >> 4) & 1;
     case TPG_PAT_CHECKERS_1X1:
     case TPG_PAT_COLOR_CHECKERS_1X1:
     case TPG_PAT_ALTERNATING_HLINES:
         return line & 1;
     case TPG_PAT_CHECKERS_2X2:
     case TPG_PAT_COLOR_CHECKERS_2X2:
         return (line & 2) >> 1;
     case TPG_PAT_100_COLORSQUARES:
     case TPG_PAT_100_HCOLORBAR:
         return (line * 8) / tpg->src_height;
     case TPG_PAT_CROSS_1_PIXEL:
         return line == tpg->src_height / 2;
     case TPG_PAT_CROSS_2_PIXELS:
         return (line + 1) / 2 == tpg->src_height / 4;
     case TPG_PAT_CROSS_10_PIXELS:
         return (line + 10) / 20 == tpg->src_height / 40;
     default:
         return 0;
     }
 }
 
 /*
  * Which color should be used for the given pattern line and X coordinate.
  * Note: x is in the range 0 to 2 * tpg->src_width.
  */
 static enum tpg_color tpg_get_color(const struct tpg_data *tpg,
                     unsigned pat_line, unsigned x)
 {
     /* Maximum number of bars are TPG_COLOR_MAX - otherwise, the input print code
        should be modified */
     static const enum tpg_color bars[3][8] = {
         /* Standard ITU-R 75% color bar sequence */
         { TPG_COLOR_CSC_WHITE,   TPG_COLOR_75_YELLOW,
           TPG_COLOR_75_CYAN,     TPG_COLOR_75_GREEN,
           TPG_COLOR_75_MAGENTA,  TPG_COLOR_75_RED,
           TPG_COLOR_75_BLUE,     TPG_COLOR_100_BLACK, },
         /* Standard ITU-R 100% color bar sequence */
         { TPG_COLOR_100_WHITE,   TPG_COLOR_100_YELLOW,
           TPG_COLOR_100_CYAN,    TPG_COLOR_100_GREEN,
           TPG_COLOR_100_MAGENTA, TPG_COLOR_100_RED,
           TPG_COLOR_100_BLUE,    TPG_COLOR_100_BLACK, },
         /* Color bar sequence suitable to test CSC */
         { TPG_COLOR_CSC_WHITE,   TPG_COLOR_CSC_YELLOW,
           TPG_COLOR_CSC_CYAN,    TPG_COLOR_CSC_GREEN,
           TPG_COLOR_CSC_MAGENTA, TPG_COLOR_CSC_RED,
           TPG_COLOR_CSC_BLUE,    TPG_COLOR_CSC_BLACK, },
     };
 
     switch (tpg->pattern) {
     case TPG_PAT_75_COLORBAR:
     case TPG_PAT_100_COLORBAR:
     case TPG_PAT_CSC_COLORBAR:
         return bars[tpg->pattern][((x * 8) / tpg->src_width) % 8];
     case TPG_PAT_100_COLORSQUARES:
         return bars[1][(pat_line + (x * 8) / tpg->src_width) % 8];
     case TPG_PAT_100_HCOLORBAR:
         return bars[1][pat_line];
     case TPG_PAT_BLACK:
         return TPG_COLOR_100_BLACK;
     case TPG_PAT_WHITE:
         return TPG_COLOR_100_WHITE;
     case TPG_PAT_RED:
         return TPG_COLOR_100_RED;
     case TPG_PAT_GREEN:
         return TPG_COLOR_100_GREEN;
     case TPG_PAT_BLUE:
         return TPG_COLOR_100_BLUE;
     case TPG_PAT_CHECKERS_16X16:
         return (((x >> 4) & 1) ^ (pat_line & 1)) ?
             TPG_COLOR_100_BLACK : TPG_COLOR_100_WHITE;
     case TPG_PAT_CHECKERS_1X1:
         return ((x & 1) ^ (pat_line & 1)) ?
             TPG_COLOR_100_WHITE : TPG_COLOR_100_BLACK;
     case TPG_PAT_COLOR_CHECKERS_1X1:
         return ((x & 1) ^ (pat_line & 1)) ?
             TPG_COLOR_100_RED : TPG_COLOR_100_BLUE;
     case TPG_PAT_CHECKERS_2X2:
         return (((x >> 1) & 1) ^ (pat_line & 1)) ?
             TPG_COLOR_100_WHITE : TPG_COLOR_100_BLACK;
     case TPG_PAT_COLOR_CHECKERS_2X2:
         return (((x >> 1) & 1) ^ (pat_line & 1)) ?
             TPG_COLOR_100_RED : TPG_COLOR_100_BLUE;
     case TPG_PAT_ALTERNATING_HLINES:
         return pat_line ? TPG_COLOR_100_WHITE : TPG_COLOR_100_BLACK;
     case TPG_PAT_ALTERNATING_VLINES:
         return (x & 1) ? TPG_COLOR_100_WHITE : TPG_COLOR_100_BLACK;
     case TPG_PAT_CROSS_1_PIXEL:
         if (pat_line || (x % tpg->src_width) == tpg->src_width / 2)
             return TPG_COLOR_100_BLACK;
         return TPG_COLOR_100_WHITE;
     case TPG_PAT_CROSS_2_PIXELS:
         if (pat_line || ((x % tpg->src_width) + 1) / 2 == tpg->src_width / 4)
             return TPG_COLOR_100_BLACK;
         return TPG_COLOR_100_WHITE;
     case TPG_PAT_CROSS_10_PIXELS:
         if (pat_line || ((x % tpg->src_width) + 10) / 20 == tpg->src_width / 40)
             return TPG_COLOR_100_BLACK;
         return TPG_COLOR_100_WHITE;
     case TPG_PAT_GRAY_RAMP:
         return TPG_COLOR_RAMP + ((x % tpg->src_width) * 256) / tpg->src_width;
     default:
         return TPG_COLOR_100_RED;
     }
 }
 
 /*
  * Given the pixel aspect ratio and video aspect ratio calculate the
  * coordinates of a centered square and the coordinates of the border of
  * the active video area. The coordinates are relative to the source
  * frame rectangle.
  */
 static void tpg_calculate_square_border(struct tpg_data *tpg)
 {
     unsigned w = tpg->src_width;
     unsigned h = tpg->src_height;
     unsigned sq_w, sq_h;
 
     sq_w = (w * 2 / 5) & ~1;
     if (((w - sq_w) / 2) & 1)
         sq_w += 2;
     sq_h = sq_w;
     tpg->square.width = sq_w;
     if (tpg->vid_aspect == TPG_VIDEO_ASPECT_16X9_ANAMORPHIC) {
         unsigned ana_sq_w = (sq_w / 4) * 3;
 
         if (((w - ana_sq_w) / 2) & 1)
             ana_sq_w += 2;
         tpg->square.width = ana_sq_w;
     }
     tpg->square.left = (w - tpg->square.width) / 2;
     if (tpg->pix_aspect == TPG_PIXEL_ASPECT_NTSC)
         sq_h = sq_w * 10 / 11;
     else if (tpg->pix_aspect == TPG_PIXEL_ASPECT_PAL)
         sq_h = sq_w * 59 / 54;
     tpg->square.height = sq_h;
     tpg->square.top = (h - sq_h) / 2;
     tpg->border.left = 0;
     tpg->border.width = w;
     tpg->border.top = 0;
     tpg->border.height = h;
     switch (tpg->vid_aspect) {
     case TPG_VIDEO_ASPECT_4X3:
         if (tpg->pix_aspect)
             return;
         if (3 * w >= 4 * h) {
             tpg->border.width = ((4 * h) / 3) & ~1;
             if (((w - tpg->border.width) / 2) & ~1)
                 tpg->border.width -= 2;
             tpg->border.left = (w - tpg->border.width) / 2;
             break;
         }
         tpg->border.height = ((3 * w) / 4) & ~1;
         tpg->border.top = (h - tpg->border.height) / 2;
         break;
     case TPG_VIDEO_ASPECT_14X9_CENTRE:
         if (tpg->pix_aspect) {
             tpg->border.height = tpg->pix_aspect == TPG_PIXEL_ASPECT_NTSC ? 420 : 506;
             tpg->border.top = (h - tpg->border.height) / 2;
             break;
         }
         if (9 * w >= 14 * h) {
             tpg->border.width = ((14 * h) / 9) & ~1;
             if (((w - tpg->border.width) / 2) & ~1)
                 tpg->border.width -= 2;
             tpg->border.left = (w - tpg->border.width) / 2;
             break;
         }
         tpg->border.height = ((9 * w) / 14) & ~1;
         tpg->border.top = (h - tpg->border.height) / 2;
         break;
     case TPG_VIDEO_ASPECT_16X9_CENTRE:
         if (tpg->pix_aspect) {
             tpg->border.height = tpg->pix_aspect == TPG_PIXEL_ASPECT_NTSC ? 368 : 442;
             tpg->border.top = (h - tpg->border.height) / 2;
             break;
         }
         if (9 * w >= 16 * h) {
             tpg->border.width = ((16 * h) / 9) & ~1;
             if (((w - tpg->border.width) / 2) & ~1)
                 tpg->border.width -= 2;
             tpg->border.left = (w - tpg->border.width) / 2;
             break;
         }
         tpg->border.height = ((9 * w) / 16) & ~1;
         tpg->border.top = (h - tpg->border.height) / 2;
         break;
     default:
         break;
     }
 }
 
 static void tpg_precalculate_line(struct tpg_data *tpg)
 {
     enum tpg_color contrast;
     u8 pix[TPG_MAX_PLANES][8];
     unsigned pat;
     unsigned p;
     unsigned x;
 
     switch (tpg->pattern) {
     case TPG_PAT_GREEN:
         contrast = TPG_COLOR_100_RED;
         break;
     case TPG_PAT_CSC_COLORBAR:
         contrast = TPG_COLOR_CSC_GREEN;
         break;
     default:
         contrast = TPG_COLOR_100_GREEN;
         break;
     }
 
     for (pat = 0; pat < tpg_get_pat_lines(tpg); pat++) {
         /* Coarse scaling with Bresenham */
         unsigned int_part = tpg->src_width / tpg->scaled_width;
         unsigned fract_part = tpg->src_width % tpg->scaled_width;
         unsigned src_x = 0;
         unsigned error = 0;
 
         for (x = 0; x < tpg->scaled_width * 2; x += 2) {
             unsigned real_x = src_x;
             enum tpg_color color1, color2;
 
             real_x = tpg->hflip ? tpg->src_width * 2 - real_x - 2 : real_x;
             color1 = tpg_get_color(tpg, pat, real_x);
 
             src_x += int_part;
             error += fract_part;
             if (error >= tpg->scaled_width) {
                 error -= tpg->scaled_width;
                 src_x++;
             }
 
             real_x = src_x;
             real_x = tpg->hflip ? tpg->src_width * 2 - real_x - 2 : real_x;
             color2 = tpg_get_color(tpg, pat, real_x);
 
             src_x += int_part;
             error += fract_part;
             if (error >= tpg->scaled_width) {
                 error -= tpg->scaled_width;
                 src_x++;
             }
 
             gen_twopix(tpg, pix, tpg->hflip ? color2 : color1, 0);
             gen_twopix(tpg, pix, tpg->hflip ? color1 : color2, 1);
             for (p = 0; p < tpg->planes; p++) {
                 unsigned twopixsize = tpg->twopixelsize[p];
                 unsigned hdiv = tpg->hdownsampling[p];
                 u8 *pos = tpg->lines[pat][p] + tpg_hdiv(tpg, p, x);
 
                 memcpy(pos, pix[p], twopixsize / hdiv);
             }
         }
     }
 
     if (tpg->vdownsampling[tpg->planes - 1] > 1) {
         unsigned pat_lines = tpg_get_pat_lines(tpg);
 
         for (pat = 0; pat < pat_lines; pat++) {
             unsigned next_pat = (pat + 1) % pat_lines;
 
             for (p = 1; p < tpg->planes; p++) {
                 unsigned w = tpg_hdiv(tpg, p, tpg->scaled_width * 2);
                 u8 *pos1 = tpg->lines[pat][p];
                 u8 *pos2 = tpg->lines[next_pat][p];
                 u8 *dest = tpg->downsampled_lines[pat][p];
 
                 for (x = 0; x < w; x++, pos1++, pos2++, dest++)
                     *dest = ((u16)*pos1 + (u16)*pos2) / 2;
             }
         }
     }
 
     gen_twopix(tpg, pix, contrast, 0);
     gen_twopix(tpg, pix, contrast, 1);
     for (p = 0; p < tpg->planes; p++) {
         unsigned twopixsize = tpg->twopixelsize[p];
         u8 *pos = tpg->contrast_line[p];
 
         for (x = 0; x < tpg->scaled_width; x += 2, pos += twopixsize)
             memcpy(pos, pix[p], twopixsize);
     }
 
     gen_twopix(tpg, pix, TPG_COLOR_100_BLACK, 0);
     gen_twopix(tpg, pix, TPG_COLOR_100_BLACK, 1);
     for (p = 0; p < tpg->planes; p++) {
         unsigned twopixsize = tpg->twopixelsize[p];
         u8 *pos = tpg->black_line[p];
 
         for (x = 0; x < tpg->scaled_width; x += 2, pos += twopixsize)
             memcpy(pos, pix[p], twopixsize);
     }
 
     for (x = 0; x < tpg->scaled_width * 2; x += 2) {
         gen_twopix(tpg, pix, TPG_COLOR_RANDOM, 0);
         gen_twopix(tpg, pix, TPG_COLOR_RANDOM, 1);
         for (p = 0; p < tpg->planes; p++) {
             unsigned twopixsize = tpg->twopixelsize[p];
             u8 *pos = tpg->random_line[p] + x * twopixsize / 2;
 
             memcpy(pos, pix[p], twopixsize);
         }
     }
 
     gen_twopix(tpg, tpg->textbg, TPG_COLOR_TEXTBG, 0);
     gen_twopix(tpg, tpg->textbg, TPG_COLOR_TEXTBG, 1);
     gen_twopix(tpg, tpg->textfg, TPG_COLOR_TEXTFG, 0);
     gen_twopix(tpg, tpg->textfg, TPG_COLOR_TEXTFG, 1);
 }
 
 /* need this to do rgb24 rendering */
 typedef struct { u16 __; u8 _; } __packed x24;
 
 #define PRINTSTR(PIXTYPE) do {  \
     unsigned vdiv = tpg->vdownsampling[p]; \
     unsigned hdiv = tpg->hdownsampling[p]; \
     int line;   \
     PIXTYPE fg; \
     PIXTYPE bg; \
     memcpy(&fg, tpg->textfg[p], sizeof(PIXTYPE));   \
     memcpy(&bg, tpg->textbg[p], sizeof(PIXTYPE));   \
     \
     for (line = first; line < 16; line += vdiv * step) {    \
         int l = tpg->vflip ? 15 - line : line; \
         PIXTYPE *pos = (PIXTYPE *)(basep[p][(line / vdiv) & 1] + \
                    ((y * step + l) / (vdiv * div)) * tpg->bytesperline[p] + \
                    (x / hdiv) * sizeof(PIXTYPE));   \
         unsigned s; \
     \
         for (s = 0; s < len; s++) { \
             u8 chr = font8x16[(u8)text[s] * 16 + line]; \
     \
             if (hdiv == 2 && tpg->hflip) { \
                 pos[3] = (chr & (0x01 << 6) ? fg : bg); \
                 pos[2] = (chr & (0x01 << 4) ? fg : bg); \
                 pos[1] = (chr & (0x01 << 2) ? fg : bg); \
                 pos[0] = (chr & (0x01 << 0) ? fg : bg); \
             } else if (hdiv == 2) { \
                 pos[0] = (chr & (0x01 << 7) ? fg : bg); \
                 pos[1] = (chr & (0x01 << 5) ? fg : bg); \
                 pos[2] = (chr & (0x01 << 3) ? fg : bg); \
                 pos[3] = (chr & (0x01 << 1) ? fg : bg); \
             } else if (tpg->hflip) { \
                 pos[7] = (chr & (0x01 << 7) ? fg : bg); \
                 pos[6] = (chr & (0x01 << 6) ? fg : bg); \
                 pos[5] = (chr & (0x01 << 5) ? fg : bg); \
                 pos[4] = (chr & (0x01 << 4) ? fg : bg); \
                 pos[3] = (chr & (0x01 << 3) ? fg : bg); \
                 pos[2] = (chr & (0x01 << 2) ? fg : bg); \
                 pos[1] = (chr & (0x01 << 1) ? fg : bg); \
                 pos[0] = (chr & (0x01 << 0) ? fg : bg); \
             } else { \
                 pos[0] = (chr & (0x01 << 7) ? fg : bg); \
                 pos[1] = (chr & (0x01 << 6) ? fg : bg); \
                 pos[2] = (chr & (0x01 << 5) ? fg : bg); \
                 pos[3] = (chr & (0x01 << 4) ? fg : bg); \
                 pos[4] = (chr & (0x01 << 3) ? fg : bg); \
                 pos[5] = (chr & (0x01 << 2) ? fg : bg); \
                 pos[6] = (chr & (0x01 << 1) ? fg : bg); \
                 pos[7] = (chr & (0x01 << 0) ? fg : bg); \
             } \
     \
             pos += (tpg->hflip ? -8 : 8) / (int)hdiv;   \
         }   \
     }   \
 } while (0)
 
 static noinline void tpg_print_str_2(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
             unsigned p, unsigned first, unsigned div, unsigned step,
             int y, int x, const char *text, unsigned len)
 {
     PRINTSTR(u8);
 }
 
 static noinline void tpg_print_str_4(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
             unsigned p, unsigned first, unsigned div, unsigned step,
             int y, int x, const char *text, unsigned len)
 {
     PRINTSTR(u16);
 }
 
 static noinline void tpg_print_str_6(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
             unsigned p, unsigned first, unsigned div, unsigned step,
             int y, int x, const char *text, unsigned len)
 {
     PRINTSTR(x24);
 }
 
 static noinline void tpg_print_str_8(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
             unsigned p, unsigned first, unsigned div, unsigned step,
             int y, int x, const char *text, unsigned len)
 {
     PRINTSTR(u32);
 }
 
 void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
           int y, int x, const char *text)
 {
     unsigned step = V4L2_FIELD_HAS_T_OR_B(tpg->field) ? 2 : 1;
     unsigned div = step;
     unsigned first = 0;
     unsigned len;
     unsigned p;
 
     if (font8x16 == NULL || basep == NULL || text == NULL)
         return;
 
     len = strlen(text);
 
     /* Checks if it is possible to show string */
     if (y + 16 >= tpg->compose.height || x + 8 >= tpg->compose.width)
         return;
 
     if (len > (tpg->compose.width - x) / 8)
         len = (tpg->compose.width - x) / 8;
     if (tpg->vflip)
         y = tpg->compose.height - y - 16;
     if (tpg->hflip)
         x = tpg->compose.width - x - 8;
     y += tpg->compose.top;
     x += tpg->compose.left;
     if (tpg->field == V4L2_FIELD_BOTTOM)
         first = 1;
     else if (tpg->field == V4L2_FIELD_SEQ_TB || tpg->field == V4L2_FIELD_SEQ_BT)
         div = 2;
 
     for (p = 0; p < tpg->planes; p++) {
         /* Print text */
         switch (tpg->twopixelsize[p]) {
         case 2:
             tpg_print_str_2(tpg, basep, p, first, div, step, y, x,
                     text, len);
             break;
         case 4:
             tpg_print_str_4(tpg, basep, p, first, div, step, y, x,
                     text, len);
             break;
         case 6:
             tpg_print_str_6(tpg, basep, p, first, div, step, y, x,
                     text, len);
             break;
         case 8:
             tpg_print_str_8(tpg, basep, p, first, div, step, y, x,
                     text, len);
             break;
         }
     }
 }
 EXPORT_SYMBOL_GPL(tpg_gen_text);
 
 const char *tpg_g_color_order(const struct tpg_data *tpg)
 {
     switch (tpg->pattern) {
     case TPG_PAT_75_COLORBAR:
     case TPG_PAT_100_COLORBAR:
     case TPG_PAT_CSC_COLORBAR:
     case TPG_PAT_100_HCOLORBAR:
         return "White, yellow, cyan, green, magenta, red, blue, black";
     case TPG_PAT_BLACK:
         return "Black";
     case TPG_PAT_WHITE:
         return "White";
     case TPG_PAT_RED:
         return "Red";
     case TPG_PAT_GREEN:
         return "Green";
     case TPG_PAT_BLUE:
         return "Blue";
     default:
         return NULL;
     }
 }
 EXPORT_SYMBOL_GPL(tpg_g_color_order);
 
 void tpg_update_mv_step(struct tpg_data *tpg)
 {
     int factor = tpg->mv_hor_mode > TPG_MOVE_NONE ? -1 : 1;
 
     if (tpg->hflip)
         factor = -factor;
     switch (tpg->mv_hor_mode) {
     case TPG_MOVE_NEG_FAST:
     case TPG_MOVE_POS_FAST:
         tpg->mv_hor_step = ((tpg->src_width + 319) / 320) * 4;
         break;
     case TPG_MOVE_NEG:
     case TPG_MOVE_POS:
         tpg->mv_hor_step = ((tpg->src_width + 639) / 640) * 4;
         break;
     case TPG_MOVE_NEG_SLOW:
     case TPG_MOVE_POS_SLOW:
         tpg->mv_hor_step = 2;
         break;
     case TPG_MOVE_NONE:
         tpg->mv_hor_step = 0;
         break;
     }
     if (factor < 0)
         tpg->mv_hor_step = tpg->src_width - tpg->mv_hor_step;
 
     factor = tpg->mv_vert_mode > TPG_MOVE_NONE ? -1 : 1;
     switch (tpg->mv_vert_mode) {
     case TPG_MOVE_NEG_FAST:
     case TPG_MOVE_POS_FAST:
         tpg->mv_vert_step = ((tpg->src_width + 319) / 320) * 4;
         break;
     case TPG_MOVE_NEG:
     case TPG_MOVE_POS:
         tpg->mv_vert_step = ((tpg->src_width + 639) / 640) * 4;
         break;
     case TPG_MOVE_NEG_SLOW:
     case TPG_MOVE_POS_SLOW:
         tpg->mv_vert_step = 1;
         break;
     case TPG_MOVE_NONE:
         tpg->mv_vert_step = 0;
         break;
     }
     if (factor < 0)
         tpg->mv_vert_step = tpg->src_height - tpg->mv_vert_step;
 }
 EXPORT_SYMBOL_GPL(tpg_update_mv_step);
 
 /* Map the line number relative to the crop rectangle to a frame line number */
 static unsigned tpg_calc_frameline(const struct tpg_data *tpg, unsigned src_y,
                     unsigned field)
 {
     switch (field) {
     case V4L2_FIELD_TOP:
         return tpg->crop.top + src_y * 2;
     case V4L2_FIELD_BOTTOM:
         return tpg->crop.top + src_y * 2 + 1;
     default:
         return src_y + tpg->crop.top;
     }
 }
 
 /*
  * Map the line number relative to the compose rectangle to a destination
  * buffer line number.
  */
 static unsigned tpg_calc_buffer_line(const struct tpg_data *tpg, unsigned y,
                     unsigned field)
 {
     y += tpg->compose.top;
     switch (field) {
     case V4L2_FIELD_SEQ_TB:
         if (y & 1)
             return tpg->buf_height / 2 + y / 2;
         return y / 2;
     case V4L2_FIELD_SEQ_BT:
         if (y & 1)
             return y / 2;
         return tpg->buf_height / 2 + y / 2;
     default:
         return y;
     }
 }
 
 static void tpg_recalc(struct tpg_data *tpg)
 {
     if (tpg->recalc_colors) {
         tpg->recalc_colors = false;
         tpg->recalc_lines = true;
         tpg->real_xfer_func = tpg->xfer_func;
         tpg->real_ycbcr_enc = tpg->ycbcr_enc;
         tpg->real_hsv_enc = tpg->hsv_enc;
         tpg->real_quantization = tpg->quantization;
 
         if (tpg->xfer_func == V4L2_XFER_FUNC_DEFAULT)
             tpg->real_xfer_func =
                 V4L2_MAP_XFER_FUNC_DEFAULT(tpg->colorspace);
 
         if (tpg->ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT)
             tpg->real_ycbcr_enc =
                 V4L2_MAP_YCBCR_ENC_DEFAULT(tpg->colorspace);
 
         if (tpg->quantization == V4L2_QUANTIZATION_DEFAULT)
             tpg->real_quantization =
                 V4L2_MAP_QUANTIZATION_DEFAULT(
                     tpg->color_enc != TGP_COLOR_ENC_YCBCR,
                     tpg->colorspace, tpg->real_ycbcr_enc);
 
         tpg_precalculate_colors(tpg);
     }
     if (tpg->recalc_square_border) {
         tpg->recalc_square_border = false;
         tpg_calculate_square_border(tpg);
     }
     if (tpg->recalc_lines) {
         tpg->recalc_lines = false;
         tpg_precalculate_line(tpg);
     }
 }
 
 void tpg_calc_text_basep(struct tpg_data *tpg,
         u8 *basep[TPG_MAX_PLANES][2], unsigned p, u8 *vbuf)
 {
     unsigned stride = tpg->bytesperline[p];
     unsigned h = tpg->buf_height;
 
     tpg_recalc(tpg);
 
     basep[p][0] = vbuf;
     basep[p][1] = vbuf;
     h /= tpg->vdownsampling[p];
     if (tpg->field == V4L2_FIELD_SEQ_TB)
         basep[p][1] += h * stride / 2;
     else if (tpg->field == V4L2_FIELD_SEQ_BT)
         basep[p][0] += h * stride / 2;
     if (p == 0 && tpg->interleaved)
         tpg_calc_text_basep(tpg, basep, 1, vbuf);
 }
 EXPORT_SYMBOL_GPL(tpg_calc_text_basep);
 
 static int tpg_pattern_avg(const struct tpg_data *tpg,
                unsigned pat1, unsigned pat2)
 {
     unsigned pat_lines = tpg_get_pat_lines(tpg);
 
     if (pat1 == (pat2 + 1) % pat_lines)
         return pat2;
     if (pat2 == (pat1 + 1) % pat_lines)
         return pat1;
     return -1;
 }
 
 static const char *tpg_color_enc_str(enum tgp_color_enc
                          color_enc)
 {
     switch (color_enc) {
     case TGP_COLOR_ENC_HSV:
         return "HSV";
     case TGP_COLOR_ENC_YCBCR:
         return "Y'CbCr";
     case TGP_COLOR_ENC_LUMA:
         return "Luma";
     case TGP_COLOR_ENC_RGB:
     default:
         return "R'G'B";
 
     }
 }
 
 void tpg_log_status(struct tpg_data *tpg)
 {
     pr_info("tpg source WxH: %ux%u (%s)\n",
         tpg->src_width, tpg->src_height,
         tpg_color_enc_str(tpg->color_enc));
     pr_info("tpg field: %u\n", tpg->field);
     pr_info("tpg crop: %ux%u@%dx%d\n", tpg->crop.width, tpg->crop.height,
             tpg->crop.left, tpg->crop.top);
     pr_info("tpg compose: %ux%u@%dx%d\n", tpg->compose.width, tpg->compose.height,
             tpg->compose.left, tpg->compose.top);
     pr_info("tpg colorspace: %d\n", tpg->colorspace);
     pr_info("tpg transfer function: %d/%d\n", tpg->xfer_func, tpg->real_xfer_func);
     if (tpg->color_enc == TGP_COLOR_ENC_HSV)
         pr_info("tpg HSV encoding: %d/%d\n",
             tpg->hsv_enc, tpg->real_hsv_enc);
     else if (tpg->color_enc == TGP_COLOR_ENC_YCBCR)
         pr_info("tpg Y'CbCr encoding: %d/%d\n",
             tpg->ycbcr_enc, tpg->real_ycbcr_enc);
     pr_info("tpg quantization: %d/%d\n", tpg->quantization, tpg->real_quantization);
     pr_info("tpg RGB range: %d/%d\n", tpg->rgb_range, tpg->real_rgb_range);
 }
 EXPORT_SYMBOL_GPL(tpg_log_status);
 
 /*
  * This struct contains common parameters used by both the drawing of the
  * test pattern and the drawing of the extras (borders, square, etc.)
  */
 struct tpg_draw_params {
     /* common data */
     bool is_tv;
     bool is_60hz;
     unsigned twopixsize;
     unsigned img_width;
     unsigned stride;
     unsigned hmax;
     unsigned frame_line;
     unsigned frame_line_next;
 
     /* test pattern */
     unsigned mv_hor_old;
     unsigned mv_hor_new;
     unsigned mv_vert_old;
     unsigned mv_vert_new;
 
     /* extras */
     unsigned wss_width;
     unsigned wss_random_offset;
     unsigned sav_eav_f;
     unsigned left_pillar_width;
     unsigned right_pillar_start;
 };
 
 static void tpg_fill_params_pattern(const struct tpg_data *tpg, unsigned p,
                     struct tpg_draw_params *params)
 {
     params->mv_hor_old =
         tpg_hscale_div(tpg, p, tpg->mv_hor_count % tpg->src_width);
     params->mv_hor_new =
         tpg_hscale_div(tpg, p, (tpg->mv_hor_count + tpg->mv_hor_step) %
                    tpg->src_width);
     params->mv_vert_old = tpg->mv_vert_count % tpg->src_height;
     params->mv_vert_new =
         (tpg->mv_vert_count + tpg->mv_vert_step) % tpg->src_height;
 }
 
 static void tpg_fill_params_extras(const struct tpg_data *tpg,
                    unsigned p,
                    struct tpg_draw_params *params)
 {
     unsigned left_pillar_width = 0;
     unsigned right_pillar_start = params->img_width;
 
     params->wss_width = tpg->crop.left < tpg->src_width / 2 ?
         tpg->src_width / 2 - tpg->crop.left : 0;
     if (params->wss_width > tpg->crop.width)
         params->wss_width = tpg->crop.width;
     params->wss_width = tpg_hscale_div(tpg, p, params->wss_width);
     params->wss_random_offset =
         params->twopixsize * prandom_u32_max(tpg->src_width / 2);
 
     if (tpg->crop.left < tpg->border.left) {
         left_pillar_width = tpg->border.left - tpg->crop.left;
         if (left_pillar_width > tpg->crop.width)
             left_pillar_width = tpg->crop.width;
         left_pillar_width = tpg_hscale_div(tpg, p, left_pillar_width);
     }
     params->left_pillar_width = left_pillar_width;
 
     if (tpg->crop.left + tpg->crop.width >
         tpg->border.left + tpg->border.width) {
         right_pillar_start =
             tpg->border.left + tpg->border.width - tpg->crop.left;
         right_pillar_start =
             tpg_hscale_div(tpg, p, right_pillar_start);
         if (right_pillar_start > params->img_width)
             right_pillar_start = params->img_width;
     }
     params->right_pillar_start = right_pillar_start;
 
     params->sav_eav_f = tpg->field ==
             (params->is_60hz ? V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM);
 }
 
 static void tpg_fill_plane_extras(const struct tpg_data *tpg,
                   const struct tpg_draw_params *params,
                   unsigned p, unsigned h, u8 *vbuf)
 {
     unsigned twopixsize = params->twopixsize;
     unsigned img_width = params->img_width;
     unsigned frame_line = params->frame_line;
     const struct v4l2_rect *sq = &tpg->square;
     const struct v4l2_rect *b = &tpg->border;
     const struct v4l2_rect *c = &tpg->crop;
 
     if (params->is_tv && !params->is_60hz &&
         frame_line == 0 && params->wss_width) {
         /*
          * Replace the first half of the top line of a 50 Hz frame
          * with random data to simulate a WSS signal.
          */
         u8 *wss = tpg->random_line[p] + params->wss_random_offset;
 
         memcpy(vbuf, wss, params->wss_width);
     }
 
     if (tpg->show_border && frame_line >= b->top &&
         frame_line < b->top + b->height) {
         unsigned bottom = b->top + b->height - 1;
         unsigned left = params->left_pillar_width;
         unsigned right = params->right_pillar_start;
 
         if (frame_line == b->top || frame_line == b->top + 1 ||
             frame_line == bottom || frame_line == bottom - 1) {
             memcpy(vbuf + left, tpg->contrast_line[p],
                     right - left);
         } else {
             if (b->left >= c->left &&
                 b->left < c->left + c->width)
                 memcpy(vbuf + left,
                     tpg->contrast_line[p], twopixsize);
             if (b->left + b->width > c->left &&
                 b->left + b->width <= c->left + c->width)
                 memcpy(vbuf + right - twopixsize,
                     tpg->contrast_line[p], twopixsize);
         }
     }
     if (tpg->qual != TPG_QUAL_NOISE && frame_line >= b->top &&
         frame_line < b->top + b->height) {
         memcpy(vbuf, tpg->black_line[p], params->left_pillar_width);
         memcpy(vbuf + params->right_pillar_start, tpg->black_line[p],
                img_width - params->right_pillar_start);
     }
     if (tpg->show_square && frame_line >= sq->top &&
         frame_line < sq->top + sq->height &&
         sq->left < c->left + c->width &&
         sq->left + sq->width >= c->left) {
         unsigned left = sq->left;
         unsigned width = sq->width;
 
         if (c->left > left) {
             width -= c->left - left;
             left = c->left;
         }
         if (c->left + c->width < left + width)
             width -= left + width - c->left - c->width;
         left -= c->left;
         left = tpg_hscale_div(tpg, p, left);
         width = tpg_hscale_div(tpg, p, width);
         memcpy(vbuf + left, tpg->contrast_line[p], width);
     }
     if (tpg->insert_sav) {
         unsigned offset = tpg_hdiv(tpg, p, tpg->compose.width / 3);
         u8 *p = vbuf + offset;
         unsigned vact = 0, hact = 0;
 
         p[0] = 0xff;
         p[1] = 0;
         p[2] = 0;
         p[3] = 0x80 | (params->sav_eav_f << 6) |
             (vact << 5) | (hact << 4) |
             ((hact ^ vact) << 3) |
             ((hact ^ params->sav_eav_f) << 2) |
             ((params->sav_eav_f ^ vact) << 1) |
             (hact ^ vact ^ params->sav_eav_f);
     }
     if (tpg->insert_eav) {
         unsigned offset = tpg_hdiv(tpg, p, tpg->compose.width * 2 / 3);
         u8 *p = vbuf + offset;
         unsigned vact = 0, hact = 1;
 
         p[0] = 0xff;
         p[1] = 0;
         p[2] = 0;
         p[3] = 0x80 | (params->sav_eav_f << 6) |
             (vact << 5) | (hact << 4) |
             ((hact ^ vact) << 3) |
             ((hact ^ params->sav_eav_f) << 2) |
             ((params->sav_eav_f ^ vact) << 1) |
             (hact ^ vact ^ params->sav_eav_f);
     }
     if (tpg->insert_hdmi_video_guard_band) {
         unsigned int i;
 
         switch (tpg->fourcc) {
         case V4L2_PIX_FMT_BGR24:
         case V4L2_PIX_FMT_RGB24:
             for (i = 0; i < 3 * 4; i += 3) {
                 vbuf[i] = 0xab;
                 vbuf[i + 1] = 0x55;
                 vbuf[i + 2] = 0xab;
             }
             break;
         case V4L2_PIX_FMT_RGB32:
         case V4L2_PIX_FMT_ARGB32:
         case V4L2_PIX_FMT_XRGB32:
         case V4L2_PIX_FMT_BGRX32:
         case V4L2_PIX_FMT_BGRA32:
             for (i = 0; i < 4 * 4; i += 4) {
                 vbuf[i] = 0x00;
                 vbuf[i + 1] = 0xab;
                 vbuf[i + 2] = 0x55;
                 vbuf[i + 3] = 0xab;
             }
             break;
         case V4L2_PIX_FMT_BGR32:
         case V4L2_PIX_FMT_XBGR32:
         case V4L2_PIX_FMT_ABGR32:
         case V4L2_PIX_FMT_RGBX32:
         case V4L2_PIX_FMT_RGBA32:
             for (i = 0; i < 4 * 4; i += 4) {
                 vbuf[i] = 0xab;
                 vbuf[i + 1] = 0x55;
                 vbuf[i + 2] = 0xab;
                 vbuf[i + 3] = 0x00;
             }
             break;
         }
     }
 }
 
 static void tpg_fill_plane_pattern(const struct tpg_data *tpg,
                    const struct tpg_draw_params *params,
                    unsigned p, unsigned h, u8 *vbuf)
 {
     unsigned twopixsize = params->twopixsize;
     unsigned img_width = params->img_width;
     unsigned mv_hor_old = params->mv_hor_old;
     unsigned mv_hor_new = params->mv_hor_new;
     unsigned mv_vert_old = params->mv_vert_old;
     unsigned mv_vert_new = params->mv_vert_new;
     unsigned frame_line = params->frame_line;
     unsigned frame_line_next = params->frame_line_next;
     unsigned line_offset = tpg_hscale_div(tpg, p, tpg->crop.left);
     bool even;
     bool fill_blank = false;
     unsigned pat_line_old;
     unsigned pat_line_new;
     u8 *linestart_older;
     u8 *linestart_newer;
     u8 *linestart_top;
     u8 *linestart_bottom;
 
     even = !(frame_line & 1);
 
     if (h >= params->hmax) {
         if (params->hmax == tpg->compose.height)
             return;
         if (!tpg->perc_fill_blank)
             return;
         fill_blank = true;
     }
 
     if (tpg->vflip) {
         frame_line = tpg->src_height - frame_line - 1;
         frame_line_next = tpg->src_height - frame_line_next - 1;
     }
 
     if (fill_blank) {
         linestart_older = tpg->contrast_line[p];
         linestart_newer = tpg->contrast_line[p];
     } else if (tpg->qual != TPG_QUAL_NOISE &&
            (frame_line < tpg->border.top ||
             frame_line >= tpg->border.top + tpg->border.height)) {
         linestart_older = tpg->black_line[p];
         linestart_newer = tpg->black_line[p];
     } else if (tpg->pattern == TPG_PAT_NOISE || tpg->qual == TPG_QUAL_NOISE) {
         linestart_older = tpg->random_line[p] +
                   twopixsize * prandom_u32_max(tpg->src_width / 2);
         linestart_newer = tpg->random_line[p] +
                   twopixsize * prandom_u32_max(tpg->src_width / 2);
     } else {
         unsigned frame_line_old =
             (frame_line + mv_vert_old) % tpg->src_height;
         unsigned frame_line_new =
             (frame_line + mv_vert_new) % tpg->src_height;
         unsigned pat_line_next_old;
         unsigned pat_line_next_new;
 
         pat_line_old = tpg_get_pat_line(tpg, frame_line_old);
         pat_line_new = tpg_get_pat_line(tpg, frame_line_new);
         linestart_older = tpg->lines[pat_line_old][p] + mv_hor_old;
         linestart_newer = tpg->lines[pat_line_new][p] + mv_hor_new;
 
         if (tpg->vdownsampling[p] > 1 && frame_line != frame_line_next) {
             int avg_pat;
 
             /*
              * Now decide whether we need to use downsampled_lines[].
              * That's necessary if the two lines use different patterns.
              */
             pat_line_next_old = tpg_get_pat_line(tpg,
                     (frame_line_next + mv_vert_old) % tpg->src_height);
             pat_line_next_new = tpg_get_pat_line(tpg,
                     (frame_line_next + mv_vert_new) % tpg->src_height);
 
             switch (tpg->field) {
             case V4L2_FIELD_INTERLACED:
             case V4L2_FIELD_INTERLACED_BT:
             case V4L2_FIELD_INTERLACED_TB:
                 avg_pat = tpg_pattern_avg(tpg, pat_line_old, pat_line_new);
                 if (avg_pat < 0)
                     break;
                 linestart_older = tpg->downsampled_lines[avg_pat][p] + mv_hor_old;
                 linestart_newer = linestart_older;
                 break;
             case V4L2_FIELD_NONE:
             case V4L2_FIELD_TOP:
             case V4L2_FIELD_BOTTOM:
             case V4L2_FIELD_SEQ_BT:
             case V4L2_FIELD_SEQ_TB:
                 avg_pat = tpg_pattern_avg(tpg, pat_line_old, pat_line_next_old);
                 if (avg_pat >= 0)
                     linestart_older = tpg->downsampled_lines[avg_pat][p] +
                         mv_hor_old;
                 avg_pat = tpg_pattern_avg(tpg, pat_line_new, pat_line_next_new);
                 if (avg_pat >= 0)
                     linestart_newer = tpg->downsampled_lines[avg_pat][p] +
                         mv_hor_new;
                 break;
             }
         }
         linestart_older += line_offset;
         linestart_newer += line_offset;
     }
     if (tpg->field_alternate) {
         linestart_top = linestart_bottom = linestart_older;
     } else if (params->is_60hz) {
         linestart_top = linestart_newer;
         linestart_bottom = linestart_older;
     } else {
         linestart_top = linestart_older;
         linestart_bottom = linestart_newer;
     }
 
     switch (tpg->field) {
     case V4L2_FIELD_INTERLACED:
     case V4L2_FIELD_INTERLACED_TB:
     case V4L2_FIELD_SEQ_TB:
     case V4L2_FIELD_SEQ_BT:
         if (even)
             memcpy(vbuf, linestart_top, img_width);
         else
             memcpy(vbuf, linestart_bottom, img_width);
         break;
     case V4L2_FIELD_INTERLACED_BT:
         if (even)
             memcpy(vbuf, linestart_bottom, img_width);
         else
             memcpy(vbuf, linestart_top, img_width);
         break;
     case V4L2_FIELD_TOP:
         memcpy(vbuf, linestart_top, img_width);
         break;
     case V4L2_FIELD_BOTTOM:
         memcpy(vbuf, linestart_bottom, img_width);
         break;
     case V4L2_FIELD_NONE:
     default:
         memcpy(vbuf, linestart_older, img_width);
         break;
     }
 }
 
 void tpg_fill_plane_buffer(struct tpg_data *tpg, v4l2_std_id std,
                unsigned p, u8 *vbuf)
 {
     struct tpg_draw_params params;
     unsigned factor = V4L2_FIELD_HAS_T_OR_B(tpg->field) ? 2 : 1;
 
     /* Coarse scaling with Bresenham */
     unsigned int_part = (tpg->crop.height / factor) / tpg->compose.height;
     unsigned fract_part = (tpg->crop.height / factor) % tpg->compose.height;
     unsigned src_y = 0;
     unsigned error = 0;
     unsigned h;
 
     tpg_recalc(tpg);
 
     params.is_tv = std;
     params.is_60hz = std & V4L2_STD_525_60;
     params.twopixsize = tpg->twopixelsize[p];
     params.img_width = tpg_hdiv(tpg, p, tpg->compose.width);
     params.stride = tpg->bytesperline[p];
     params.hmax = (tpg->compose.height * tpg->perc_fill) / 100;
 
     tpg_fill_params_pattern(tpg, p, &params);
     tpg_fill_params_extras(tpg, p, &params);
 
     vbuf += tpg_hdiv(tpg, p, tpg->compose.left);
 
     for (h = 0; h < tpg->compose.height; h++) {
         unsigned buf_line;
 
         params.frame_line = tpg_calc_frameline(tpg, src_y, tpg->field);
         params.frame_line_next = params.frame_line;
         buf_line = tpg_calc_buffer_line(tpg, h, tpg->field);
         src_y += int_part;
         error += fract_part;
         if (error >= tpg->compose.height) {
             error -= tpg->compose.height;
             src_y++;
         }
 
         /*
          * For line-interleaved formats determine the 'plane'
          * based on the buffer line.
          */
         if (tpg_g_interleaved(tpg))
             p = tpg_g_interleaved_plane(tpg, buf_line);
 
         if (tpg->vdownsampling[p] > 1) {
             /*
              * When doing vertical downsampling the field setting
              * matters: for SEQ_BT/TB we downsample each field
              * separately (i.e. lines 0+2 are combined, as are
              * lines 1+3), for the other field settings we combine
              * odd and even lines. Doing that for SEQ_BT/TB would
              * be really weird.
              */
             if (tpg->field == V4L2_FIELD_SEQ_BT ||
                 tpg->field == V4L2_FIELD_SEQ_TB) {
                 unsigned next_src_y = src_y;
 
                 if ((h & 3) >= 2)
                     continue;
                 next_src_y += int_part;
                 if (error + fract_part >= tpg->compose.height)
                     next_src_y++;
                 params.frame_line_next =
                     tpg_calc_frameline(tpg, next_src_y, tpg->field);
             } else {
                 if (h & 1)
                     continue;
                 params.frame_line_next =
                     tpg_calc_frameline(tpg, src_y, tpg->field);
             }
 
             buf_line /= tpg->vdownsampling[p];
         }
         tpg_fill_plane_pattern(tpg, &params, p, h,
                 vbuf + buf_line * params.stride);
         tpg_fill_plane_extras(tpg, &params, p, h,
                 vbuf + buf_line * params.stride);
     }
 }
 EXPORT_SYMBOL_GPL(tpg_fill_plane_buffer);
 
 void tpg_fillbuffer(struct tpg_data *tpg, v4l2_std_id std, unsigned p, u8 *vbuf)
 {
     unsigned offset = 0;
     unsigned i;
 
     if (tpg->buffers > 1) {
         tpg_fill_plane_buffer(tpg, std, p, vbuf);
         return;
     }
 
     for (i = 0; i < tpg_g_planes(tpg); i++) {
         tpg_fill_plane_buffer(tpg, std, i, vbuf + offset);
         offset += tpg_calc_plane_size(tpg, i);
     }
 }
 EXPORT_SYMBOL_GPL(tpg_fillbuffer);
 
 MODULE_DESCRIPTION("V4L2 Test Pattern Generator");
 MODULE_AUTHOR("Hans Verkuil");
 MODULE_LICENSE("GPL");