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0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Copyright (C) STMicroelectronics SA 2014
0004  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
0005  *          Vincent Abriou <vincent.abriou@st.com>
0006  *          for STMicroelectronics.
0007  */
0008 
0009 #include <linux/clk.h>
0010 #include <linux/component.h>
0011 #include <linux/io.h>
0012 #include <linux/module.h>
0013 #include <linux/of_platform.h>
0014 #include <linux/platform_device.h>
0015 #include <linux/reset.h>
0016 #include <linux/seq_file.h>
0017 
0018 #include <drm/drm_atomic_helper.h>
0019 #include <drm/drm_debugfs.h>
0020 #include <drm/drm_device.h>
0021 #include <drm/drm_file.h>
0022 #include <drm/drm_print.h>
0023 
0024 #include "sti_crtc.h"
0025 #include "sti_drv.h"
0026 #include "sti_vtg.h"
0027 
0028 /* glue registers */
0029 #define TVO_CSC_MAIN_M0                  0x000
0030 #define TVO_CSC_MAIN_M1                  0x004
0031 #define TVO_CSC_MAIN_M2                  0x008
0032 #define TVO_CSC_MAIN_M3                  0x00c
0033 #define TVO_CSC_MAIN_M4                  0x010
0034 #define TVO_CSC_MAIN_M5                  0x014
0035 #define TVO_CSC_MAIN_M6                  0x018
0036 #define TVO_CSC_MAIN_M7                  0x01c
0037 #define TVO_MAIN_IN_VID_FORMAT           0x030
0038 #define TVO_CSC_AUX_M0                   0x100
0039 #define TVO_CSC_AUX_M1                   0x104
0040 #define TVO_CSC_AUX_M2                   0x108
0041 #define TVO_CSC_AUX_M3                   0x10c
0042 #define TVO_CSC_AUX_M4                   0x110
0043 #define TVO_CSC_AUX_M5                   0x114
0044 #define TVO_CSC_AUX_M6                   0x118
0045 #define TVO_CSC_AUX_M7                   0x11c
0046 #define TVO_AUX_IN_VID_FORMAT            0x130
0047 #define TVO_VIP_HDF                      0x400
0048 #define TVO_HD_SYNC_SEL                  0x418
0049 #define TVO_HD_DAC_CFG_OFF               0x420
0050 #define TVO_VIP_HDMI                     0x500
0051 #define TVO_HDMI_FORCE_COLOR_0           0x504
0052 #define TVO_HDMI_FORCE_COLOR_1           0x508
0053 #define TVO_HDMI_CLIP_VALUE_B_CB         0x50c
0054 #define TVO_HDMI_CLIP_VALUE_Y_G          0x510
0055 #define TVO_HDMI_CLIP_VALUE_R_CR         0x514
0056 #define TVO_HDMI_SYNC_SEL                0x518
0057 #define TVO_HDMI_DFV_OBS                 0x540
0058 #define TVO_VIP_DVO                      0x600
0059 #define TVO_DVO_SYNC_SEL                 0x618
0060 #define TVO_DVO_CONFIG                   0x620
0061 
0062 #define TVO_IN_FMT_SIGNED                BIT(0)
0063 #define TVO_SYNC_EXT                     BIT(4)
0064 
0065 #define TVO_VIP_REORDER_R_SHIFT          24
0066 #define TVO_VIP_REORDER_G_SHIFT          20
0067 #define TVO_VIP_REORDER_B_SHIFT          16
0068 #define TVO_VIP_REORDER_MASK             0x3
0069 #define TVO_VIP_REORDER_Y_G_SEL          0
0070 #define TVO_VIP_REORDER_CB_B_SEL         1
0071 #define TVO_VIP_REORDER_CR_R_SEL         2
0072 
0073 #define TVO_VIP_CLIP_SHIFT               8
0074 #define TVO_VIP_CLIP_MASK                0x7
0075 #define TVO_VIP_CLIP_DISABLED            0
0076 #define TVO_VIP_CLIP_EAV_SAV             1
0077 #define TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y 2
0078 #define TVO_VIP_CLIP_LIMITED_RANGE_CB_CR 3
0079 #define TVO_VIP_CLIP_PROG_RANGE          4
0080 
0081 #define TVO_VIP_RND_SHIFT                4
0082 #define TVO_VIP_RND_MASK                 0x3
0083 #define TVO_VIP_RND_8BIT_ROUNDED         0
0084 #define TVO_VIP_RND_10BIT_ROUNDED        1
0085 #define TVO_VIP_RND_12BIT_ROUNDED        2
0086 
0087 #define TVO_VIP_SEL_INPUT_MASK           0xf
0088 #define TVO_VIP_SEL_INPUT_MAIN           0x0
0089 #define TVO_VIP_SEL_INPUT_AUX            0x8
0090 #define TVO_VIP_SEL_INPUT_FORCE_COLOR    0xf
0091 #define TVO_VIP_SEL_INPUT_BYPASS_MASK    0x1
0092 #define TVO_VIP_SEL_INPUT_BYPASSED       1
0093 
0094 #define TVO_SYNC_MAIN_VTG_SET_REF        0x00
0095 #define TVO_SYNC_AUX_VTG_SET_REF         0x10
0096 
0097 #define TVO_SYNC_HD_DCS_SHIFT            8
0098 
0099 #define TVO_SYNC_DVO_PAD_HSYNC_SHIFT     8
0100 #define TVO_SYNC_DVO_PAD_VSYNC_SHIFT     16
0101 
0102 #define ENCODER_CRTC_MASK                (BIT(0) | BIT(1))
0103 
0104 #define TVO_MIN_HD_HEIGHT                720
0105 
0106 /* enum listing the supported output data format */
0107 enum sti_tvout_video_out_type {
0108     STI_TVOUT_VIDEO_OUT_RGB,
0109     STI_TVOUT_VIDEO_OUT_YUV,
0110 };
0111 
0112 struct sti_tvout {
0113     struct device *dev;
0114     struct drm_device *drm_dev;
0115     void __iomem *regs;
0116     struct reset_control *reset;
0117     struct drm_encoder *hdmi;
0118     struct drm_encoder *hda;
0119     struct drm_encoder *dvo;
0120     bool debugfs_registered;
0121 };
0122 
0123 struct sti_tvout_encoder {
0124     struct drm_encoder encoder;
0125     struct sti_tvout *tvout;
0126 };
0127 
0128 #define to_sti_tvout_encoder(x) \
0129     container_of(x, struct sti_tvout_encoder, encoder)
0130 
0131 #define to_sti_tvout(x) to_sti_tvout_encoder(x)->tvout
0132 
0133 /* preformatter conversion matrix */
0134 static const u32 rgb_to_ycbcr_601[8] = {
0135     0xF927082E, 0x04C9FEAB, 0x01D30964, 0xFA95FD3D,
0136     0x0000082E, 0x00002000, 0x00002000, 0x00000000
0137 };
0138 
0139 /* 709 RGB to YCbCr */
0140 static const u32 rgb_to_ycbcr_709[8] = {
0141     0xF891082F, 0x0367FF40, 0x01280B71, 0xF9B1FE20,
0142     0x0000082F, 0x00002000, 0x00002000, 0x00000000
0143 };
0144 
0145 static u32 tvout_read(struct sti_tvout *tvout, int offset)
0146 {
0147     return readl(tvout->regs + offset);
0148 }
0149 
0150 static void tvout_write(struct sti_tvout *tvout, u32 val, int offset)
0151 {
0152     writel(val, tvout->regs + offset);
0153 }
0154 
0155 /**
0156  * tvout_vip_set_color_order - Set the clipping mode of a VIP
0157  *
0158  * @tvout: tvout structure
0159  * @reg: register to set
0160  * @cr_r: red chroma or red order
0161  * @y_g: y or green order
0162  * @cb_b: blue chroma or blue order
0163  */
0164 static void tvout_vip_set_color_order(struct sti_tvout *tvout, int reg,
0165                       u32 cr_r, u32 y_g, u32 cb_b)
0166 {
0167     u32 val = tvout_read(tvout, reg);
0168 
0169     val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT);
0170     val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT);
0171     val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT);
0172     val |= cr_r << TVO_VIP_REORDER_R_SHIFT;
0173     val |= y_g << TVO_VIP_REORDER_G_SHIFT;
0174     val |= cb_b << TVO_VIP_REORDER_B_SHIFT;
0175 
0176     tvout_write(tvout, val, reg);
0177 }
0178 
0179 /**
0180  * tvout_vip_set_clip_mode - Set the clipping mode of a VIP
0181  *
0182  * @tvout: tvout structure
0183  * @reg: register to set
0184  * @range: clipping range
0185  */
0186 static void tvout_vip_set_clip_mode(struct sti_tvout *tvout, int reg, u32 range)
0187 {
0188     u32 val = tvout_read(tvout, reg);
0189 
0190     val &= ~(TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT);
0191     val |= range << TVO_VIP_CLIP_SHIFT;
0192     tvout_write(tvout, val, reg);
0193 }
0194 
0195 /**
0196  * tvout_vip_set_rnd - Set the rounded value of a VIP
0197  *
0198  * @tvout: tvout structure
0199  * @reg: register to set
0200  * @rnd: rounded val per component
0201  */
0202 static void tvout_vip_set_rnd(struct sti_tvout *tvout, int reg, u32 rnd)
0203 {
0204     u32 val = tvout_read(tvout, reg);
0205 
0206     val &= ~(TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT);
0207     val |= rnd << TVO_VIP_RND_SHIFT;
0208     tvout_write(tvout, val, reg);
0209 }
0210 
0211 /**
0212  * tvout_vip_set_sel_input - Select the VIP input
0213  *
0214  * @tvout: tvout structure
0215  * @reg: register to set
0216  * @main_path: main or auxiliary path
0217  * @video_out: selected_input (main/aux + conv)
0218  */
0219 static void tvout_vip_set_sel_input(struct sti_tvout *tvout,
0220                     int reg,
0221                     bool main_path,
0222                     enum sti_tvout_video_out_type video_out)
0223 {
0224     u32 sel_input;
0225     u32 val = tvout_read(tvout, reg);
0226 
0227     if (main_path)
0228         sel_input = TVO_VIP_SEL_INPUT_MAIN;
0229     else
0230         sel_input = TVO_VIP_SEL_INPUT_AUX;
0231 
0232     switch (video_out) {
0233     case STI_TVOUT_VIDEO_OUT_RGB:
0234         sel_input |= TVO_VIP_SEL_INPUT_BYPASSED;
0235         break;
0236     case STI_TVOUT_VIDEO_OUT_YUV:
0237         sel_input &= ~TVO_VIP_SEL_INPUT_BYPASSED;
0238         break;
0239     }
0240 
0241     /* on stih407 chip the sel_input bypass mode logic is inverted */
0242     sel_input = sel_input ^ TVO_VIP_SEL_INPUT_BYPASS_MASK;
0243 
0244     val &= ~TVO_VIP_SEL_INPUT_MASK;
0245     val |= sel_input;
0246     tvout_write(tvout, val, reg);
0247 }
0248 
0249 /**
0250  * tvout_vip_set_in_vid_fmt - Select the input video signed or unsigned
0251  *
0252  * @tvout: tvout structure
0253  * @reg: register to set
0254  * @in_vid_fmt: used video input format
0255  */
0256 static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout,
0257         int reg, u32 in_vid_fmt)
0258 {
0259     u32 val = tvout_read(tvout, reg);
0260 
0261     val &= ~TVO_IN_FMT_SIGNED;
0262     val |= in_vid_fmt;
0263     tvout_write(tvout, val, reg);
0264 }
0265 
0266 /**
0267  * tvout_preformatter_set_matrix - Set preformatter matrix
0268  *
0269  * @tvout: tvout structure
0270  * @mode: display mode structure
0271  */
0272 static void tvout_preformatter_set_matrix(struct sti_tvout *tvout,
0273                       struct drm_display_mode *mode)
0274 {
0275     unsigned int i;
0276     const u32 *pf_matrix;
0277 
0278     if (mode->vdisplay >= TVO_MIN_HD_HEIGHT)
0279         pf_matrix = rgb_to_ycbcr_709;
0280     else
0281         pf_matrix = rgb_to_ycbcr_601;
0282 
0283     for (i = 0; i < 8; i++) {
0284         tvout_write(tvout, *(pf_matrix + i),
0285                 TVO_CSC_MAIN_M0 + (i * 4));
0286         tvout_write(tvout, *(pf_matrix + i),
0287                 TVO_CSC_AUX_M0 + (i * 4));
0288     }
0289 }
0290 
0291 /**
0292  * tvout_dvo_start - Start VIP block for DVO output
0293  *
0294  * @tvout: pointer on tvout structure
0295  * @main_path: true if main path has to be used in the vip configuration
0296  *    else aux path is used.
0297  */
0298 static void tvout_dvo_start(struct sti_tvout *tvout, bool main_path)
0299 {
0300     u32 tvo_in_vid_format;
0301     int val, tmp;
0302 
0303     dev_dbg(tvout->dev, "%s\n", __func__);
0304 
0305     if (main_path) {
0306         DRM_DEBUG_DRIVER("main vip for DVO\n");
0307         /* Select the input sync for dvo */
0308         tmp = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_DVO;
0309         val  = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
0310         val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
0311         val |= tmp;
0312         tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
0313         tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
0314     } else {
0315         DRM_DEBUG_DRIVER("aux vip for DVO\n");
0316         /* Select the input sync for dvo */
0317         tmp = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_DVO;
0318         val  = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
0319         val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
0320         val |= tmp;
0321         tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
0322         tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
0323     }
0324 
0325     /* Set color channel order */
0326     tvout_vip_set_color_order(tvout, TVO_VIP_DVO,
0327                   TVO_VIP_REORDER_CR_R_SEL,
0328                   TVO_VIP_REORDER_Y_G_SEL,
0329                   TVO_VIP_REORDER_CB_B_SEL);
0330 
0331     /* Set clipping mode */
0332     tvout_vip_set_clip_mode(tvout, TVO_VIP_DVO, TVO_VIP_CLIP_DISABLED);
0333 
0334     /* Set round mode (rounded to 8-bit per component) */
0335     tvout_vip_set_rnd(tvout, TVO_VIP_DVO, TVO_VIP_RND_8BIT_ROUNDED);
0336 
0337     /* Set input video format */
0338     tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
0339 
0340     /* Input selection */
0341     tvout_vip_set_sel_input(tvout, TVO_VIP_DVO, main_path,
0342                 STI_TVOUT_VIDEO_OUT_RGB);
0343 }
0344 
0345 /**
0346  * tvout_hdmi_start - Start VIP block for HDMI output
0347  *
0348  * @tvout: pointer on tvout structure
0349  * @main_path: true if main path has to be used in the vip configuration
0350  *    else aux path is used.
0351  */
0352 static void tvout_hdmi_start(struct sti_tvout *tvout, bool main_path)
0353 {
0354     u32 tvo_in_vid_format;
0355 
0356     dev_dbg(tvout->dev, "%s\n", __func__);
0357 
0358     if (main_path) {
0359         DRM_DEBUG_DRIVER("main vip for hdmi\n");
0360         /* select the input sync for hdmi */
0361         tvout_write(tvout,
0362                 TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDMI,
0363                 TVO_HDMI_SYNC_SEL);
0364         tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
0365     } else {
0366         DRM_DEBUG_DRIVER("aux vip for hdmi\n");
0367         /* select the input sync for hdmi */
0368         tvout_write(tvout,
0369                 TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDMI,
0370                 TVO_HDMI_SYNC_SEL);
0371         tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
0372     }
0373 
0374     /* set color channel order */
0375     tvout_vip_set_color_order(tvout, TVO_VIP_HDMI,
0376                   TVO_VIP_REORDER_CR_R_SEL,
0377                   TVO_VIP_REORDER_Y_G_SEL,
0378                   TVO_VIP_REORDER_CB_B_SEL);
0379 
0380     /* set clipping mode */
0381     tvout_vip_set_clip_mode(tvout, TVO_VIP_HDMI, TVO_VIP_CLIP_DISABLED);
0382 
0383     /* set round mode (rounded to 8-bit per component) */
0384     tvout_vip_set_rnd(tvout, TVO_VIP_HDMI, TVO_VIP_RND_8BIT_ROUNDED);
0385 
0386     /* set input video format */
0387     tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
0388 
0389     /* input selection */
0390     tvout_vip_set_sel_input(tvout, TVO_VIP_HDMI, main_path,
0391                 STI_TVOUT_VIDEO_OUT_RGB);
0392 }
0393 
0394 /**
0395  * tvout_hda_start - Start HDF VIP and HD DAC
0396  *
0397  * @tvout: pointer on tvout structure
0398  * @main_path: true if main path has to be used in the vip configuration
0399  *    else aux path is used.
0400  */
0401 static void tvout_hda_start(struct sti_tvout *tvout, bool main_path)
0402 {
0403     u32 tvo_in_vid_format;
0404     int val;
0405 
0406     dev_dbg(tvout->dev, "%s\n", __func__);
0407 
0408     if (main_path) {
0409         DRM_DEBUG_DRIVER("main vip for HDF\n");
0410         /* Select the input sync for HD analog and HD DCS */
0411         val  = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
0412         val  = val << TVO_SYNC_HD_DCS_SHIFT;
0413         val |= TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDF;
0414         tvout_write(tvout, val, TVO_HD_SYNC_SEL);
0415         tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
0416     } else {
0417         DRM_DEBUG_DRIVER("aux vip for HDF\n");
0418         /* Select the input sync for HD analog and HD DCS */
0419         val  = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
0420         val  = val << TVO_SYNC_HD_DCS_SHIFT;
0421         val |= TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDF;
0422         tvout_write(tvout, val, TVO_HD_SYNC_SEL);
0423         tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
0424     }
0425 
0426     /* set color channel order */
0427     tvout_vip_set_color_order(tvout, TVO_VIP_HDF,
0428                   TVO_VIP_REORDER_CR_R_SEL,
0429                   TVO_VIP_REORDER_Y_G_SEL,
0430                   TVO_VIP_REORDER_CB_B_SEL);
0431 
0432     /* set clipping mode */
0433     tvout_vip_set_clip_mode(tvout, TVO_VIP_HDF, TVO_VIP_CLIP_DISABLED);
0434 
0435     /* set round mode (rounded to 10-bit per component) */
0436     tvout_vip_set_rnd(tvout, TVO_VIP_HDF, TVO_VIP_RND_10BIT_ROUNDED);
0437 
0438     /* Set input video format */
0439     tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
0440 
0441     /* Input selection */
0442     tvout_vip_set_sel_input(tvout, TVO_VIP_HDF, main_path,
0443                 STI_TVOUT_VIDEO_OUT_YUV);
0444 
0445     /* power up HD DAC */
0446     tvout_write(tvout, 0, TVO_HD_DAC_CFG_OFF);
0447 }
0448 
0449 #define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
0450                    readl(tvout->regs + reg))
0451 
0452 static void tvout_dbg_vip(struct seq_file *s, int val)
0453 {
0454     int r, g, b, tmp, mask;
0455     char *const reorder[] = {"Y_G", "Cb_B", "Cr_R"};
0456     char *const clipping[] = {"No", "EAV/SAV", "Limited range RGB/Y",
0457                   "Limited range Cb/Cr", "decided by register"};
0458     char *const round[] = {"8-bit", "10-bit", "12-bit"};
0459     char *const input_sel[] = {"Main (color matrix enabled)",
0460                    "Main (color matrix by-passed)",
0461                    "", "", "", "", "", "",
0462                    "Aux (color matrix enabled)",
0463                    "Aux (color matrix by-passed)",
0464                    "", "", "", "", "", "Force value"};
0465 
0466     seq_putc(s, '\t');
0467     mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT;
0468     r = (val & mask) >> TVO_VIP_REORDER_R_SHIFT;
0469     mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT;
0470     g = (val & mask) >> TVO_VIP_REORDER_G_SHIFT;
0471     mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT;
0472     b = (val & mask) >> TVO_VIP_REORDER_B_SHIFT;
0473     seq_printf(s, "%-24s %s->%s %s->%s %s->%s\n", "Reorder:",
0474            reorder[r], reorder[TVO_VIP_REORDER_CR_R_SEL],
0475            reorder[g], reorder[TVO_VIP_REORDER_Y_G_SEL],
0476            reorder[b], reorder[TVO_VIP_REORDER_CB_B_SEL]);
0477     seq_puts(s, "\t\t\t\t\t");
0478     mask = TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT;
0479     tmp = (val & mask) >> TVO_VIP_CLIP_SHIFT;
0480     seq_printf(s, "%-24s %s\n", "Clipping:", clipping[tmp]);
0481     seq_puts(s, "\t\t\t\t\t");
0482     mask = TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT;
0483     tmp = (val & mask) >> TVO_VIP_RND_SHIFT;
0484     seq_printf(s, "%-24s input data rounded to %s per component\n",
0485            "Round:", round[tmp]);
0486     seq_puts(s, "\t\t\t\t\t");
0487     tmp = (val & TVO_VIP_SEL_INPUT_MASK);
0488     seq_printf(s, "%-24s %s", "Input selection:", input_sel[tmp]);
0489 }
0490 
0491 static void tvout_dbg_hd_dac_cfg(struct seq_file *s, int val)
0492 {
0493     seq_printf(s, "\t%-24s %s", "HD DAC:",
0494            val & 1 ? "disabled" : "enabled");
0495 }
0496 
0497 static int tvout_dbg_show(struct seq_file *s, void *data)
0498 {
0499     struct drm_info_node *node = s->private;
0500     struct sti_tvout *tvout = (struct sti_tvout *)node->info_ent->data;
0501     struct drm_crtc *crtc;
0502 
0503     seq_printf(s, "TVOUT: (vaddr = 0x%p)", tvout->regs);
0504 
0505     seq_puts(s, "\n\n  HDMI encoder: ");
0506     crtc = tvout->hdmi->crtc;
0507     if (crtc) {
0508         seq_printf(s, "connected to %s path",
0509                sti_crtc_is_main(crtc) ? "main" : "aux");
0510         DBGFS_DUMP(TVO_HDMI_SYNC_SEL);
0511         DBGFS_DUMP(TVO_VIP_HDMI);
0512         tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDMI));
0513     } else {
0514         seq_puts(s, "disabled");
0515     }
0516 
0517     seq_puts(s, "\n\n  DVO encoder: ");
0518     crtc = tvout->dvo->crtc;
0519     if (crtc) {
0520         seq_printf(s, "connected to %s path",
0521                sti_crtc_is_main(crtc) ? "main" : "aux");
0522         DBGFS_DUMP(TVO_DVO_SYNC_SEL);
0523         DBGFS_DUMP(TVO_DVO_CONFIG);
0524         DBGFS_DUMP(TVO_VIP_DVO);
0525         tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_DVO));
0526     } else {
0527         seq_puts(s, "disabled");
0528     }
0529 
0530     seq_puts(s, "\n\n  HDA encoder: ");
0531     crtc = tvout->hda->crtc;
0532     if (crtc) {
0533         seq_printf(s, "connected to %s path",
0534                sti_crtc_is_main(crtc) ? "main" : "aux");
0535         DBGFS_DUMP(TVO_HD_SYNC_SEL);
0536         DBGFS_DUMP(TVO_HD_DAC_CFG_OFF);
0537         tvout_dbg_hd_dac_cfg(s,
0538                      readl(tvout->regs + TVO_HD_DAC_CFG_OFF));
0539         DBGFS_DUMP(TVO_VIP_HDF);
0540         tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDF));
0541     } else {
0542         seq_puts(s, "disabled");
0543     }
0544 
0545     seq_puts(s, "\n\n  main path configuration");
0546     DBGFS_DUMP(TVO_CSC_MAIN_M0);
0547     DBGFS_DUMP(TVO_CSC_MAIN_M1);
0548     DBGFS_DUMP(TVO_CSC_MAIN_M2);
0549     DBGFS_DUMP(TVO_CSC_MAIN_M3);
0550     DBGFS_DUMP(TVO_CSC_MAIN_M4);
0551     DBGFS_DUMP(TVO_CSC_MAIN_M5);
0552     DBGFS_DUMP(TVO_CSC_MAIN_M6);
0553     DBGFS_DUMP(TVO_CSC_MAIN_M7);
0554     DBGFS_DUMP(TVO_MAIN_IN_VID_FORMAT);
0555 
0556     seq_puts(s, "\n\n  auxiliary path configuration");
0557     DBGFS_DUMP(TVO_CSC_AUX_M0);
0558     DBGFS_DUMP(TVO_CSC_AUX_M2);
0559     DBGFS_DUMP(TVO_CSC_AUX_M3);
0560     DBGFS_DUMP(TVO_CSC_AUX_M4);
0561     DBGFS_DUMP(TVO_CSC_AUX_M5);
0562     DBGFS_DUMP(TVO_CSC_AUX_M6);
0563     DBGFS_DUMP(TVO_CSC_AUX_M7);
0564     DBGFS_DUMP(TVO_AUX_IN_VID_FORMAT);
0565     seq_putc(s, '\n');
0566     return 0;
0567 }
0568 
0569 static struct drm_info_list tvout_debugfs_files[] = {
0570     { "tvout", tvout_dbg_show, 0, NULL },
0571 };
0572 
0573 static void tvout_debugfs_init(struct sti_tvout *tvout, struct drm_minor *minor)
0574 {
0575     unsigned int i;
0576 
0577     for (i = 0; i < ARRAY_SIZE(tvout_debugfs_files); i++)
0578         tvout_debugfs_files[i].data = tvout;
0579 
0580     drm_debugfs_create_files(tvout_debugfs_files,
0581                  ARRAY_SIZE(tvout_debugfs_files),
0582                  minor->debugfs_root, minor);
0583 }
0584 
0585 static void sti_tvout_encoder_dpms(struct drm_encoder *encoder, int mode)
0586 {
0587 }
0588 
0589 static void sti_tvout_encoder_mode_set(struct drm_encoder *encoder,
0590                        struct drm_display_mode *mode,
0591                        struct drm_display_mode *adjusted_mode)
0592 {
0593 }
0594 
0595 static void sti_tvout_encoder_destroy(struct drm_encoder *encoder)
0596 {
0597     struct sti_tvout_encoder *sti_encoder = to_sti_tvout_encoder(encoder);
0598 
0599     drm_encoder_cleanup(encoder);
0600     kfree(sti_encoder);
0601 }
0602 
0603 static int sti_tvout_late_register(struct drm_encoder *encoder)
0604 {
0605     struct sti_tvout *tvout = to_sti_tvout(encoder);
0606 
0607     if (tvout->debugfs_registered)
0608         return 0;
0609 
0610     tvout_debugfs_init(tvout, encoder->dev->primary);
0611 
0612     tvout->debugfs_registered = true;
0613     return 0;
0614 }
0615 
0616 static void sti_tvout_early_unregister(struct drm_encoder *encoder)
0617 {
0618     struct sti_tvout *tvout = to_sti_tvout(encoder);
0619 
0620     if (!tvout->debugfs_registered)
0621         return;
0622 
0623     tvout->debugfs_registered = false;
0624 }
0625 
0626 static const struct drm_encoder_funcs sti_tvout_encoder_funcs = {
0627     .destroy = sti_tvout_encoder_destroy,
0628     .late_register = sti_tvout_late_register,
0629     .early_unregister = sti_tvout_early_unregister,
0630 };
0631 
0632 static void sti_dvo_encoder_enable(struct drm_encoder *encoder)
0633 {
0634     struct sti_tvout *tvout = to_sti_tvout(encoder);
0635 
0636     tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
0637 
0638     tvout_dvo_start(tvout, sti_crtc_is_main(encoder->crtc));
0639 }
0640 
0641 static void sti_dvo_encoder_disable(struct drm_encoder *encoder)
0642 {
0643     struct sti_tvout *tvout = to_sti_tvout(encoder);
0644 
0645     /* Reset VIP register */
0646     tvout_write(tvout, 0x0, TVO_VIP_DVO);
0647 }
0648 
0649 static const struct drm_encoder_helper_funcs sti_dvo_encoder_helper_funcs = {
0650     .dpms = sti_tvout_encoder_dpms,
0651     .mode_set = sti_tvout_encoder_mode_set,
0652     .enable = sti_dvo_encoder_enable,
0653     .disable = sti_dvo_encoder_disable,
0654 };
0655 
0656 static struct drm_encoder *
0657 sti_tvout_create_dvo_encoder(struct drm_device *dev,
0658                  struct sti_tvout *tvout)
0659 {
0660     struct sti_tvout_encoder *encoder;
0661     struct drm_encoder *drm_encoder;
0662 
0663     encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
0664     if (!encoder)
0665         return NULL;
0666 
0667     encoder->tvout = tvout;
0668 
0669     drm_encoder = &encoder->encoder;
0670 
0671     drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
0672 
0673     drm_encoder_init(dev, drm_encoder,
0674              &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_LVDS,
0675              NULL);
0676 
0677     drm_encoder_helper_add(drm_encoder, &sti_dvo_encoder_helper_funcs);
0678 
0679     return drm_encoder;
0680 }
0681 
0682 static void sti_hda_encoder_enable(struct drm_encoder *encoder)
0683 {
0684     struct sti_tvout *tvout = to_sti_tvout(encoder);
0685 
0686     tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
0687 
0688     tvout_hda_start(tvout, sti_crtc_is_main(encoder->crtc));
0689 }
0690 
0691 static void sti_hda_encoder_disable(struct drm_encoder *encoder)
0692 {
0693     struct sti_tvout *tvout = to_sti_tvout(encoder);
0694 
0695     /* reset VIP register */
0696     tvout_write(tvout, 0x0, TVO_VIP_HDF);
0697 
0698     /* power down HD DAC */
0699     tvout_write(tvout, 1, TVO_HD_DAC_CFG_OFF);
0700 }
0701 
0702 static const struct drm_encoder_helper_funcs sti_hda_encoder_helper_funcs = {
0703     .dpms = sti_tvout_encoder_dpms,
0704     .mode_set = sti_tvout_encoder_mode_set,
0705     .commit = sti_hda_encoder_enable,
0706     .disable = sti_hda_encoder_disable,
0707 };
0708 
0709 static struct drm_encoder *sti_tvout_create_hda_encoder(struct drm_device *dev,
0710         struct sti_tvout *tvout)
0711 {
0712     struct sti_tvout_encoder *encoder;
0713     struct drm_encoder *drm_encoder;
0714 
0715     encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
0716     if (!encoder)
0717         return NULL;
0718 
0719     encoder->tvout = tvout;
0720 
0721     drm_encoder = &encoder->encoder;
0722 
0723     drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
0724 
0725     drm_encoder_init(dev, drm_encoder,
0726             &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL);
0727 
0728     drm_encoder_helper_add(drm_encoder, &sti_hda_encoder_helper_funcs);
0729 
0730     return drm_encoder;
0731 }
0732 
0733 static void sti_hdmi_encoder_enable(struct drm_encoder *encoder)
0734 {
0735     struct sti_tvout *tvout = to_sti_tvout(encoder);
0736 
0737     tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
0738 
0739     tvout_hdmi_start(tvout, sti_crtc_is_main(encoder->crtc));
0740 }
0741 
0742 static void sti_hdmi_encoder_disable(struct drm_encoder *encoder)
0743 {
0744     struct sti_tvout *tvout = to_sti_tvout(encoder);
0745 
0746     /* reset VIP register */
0747     tvout_write(tvout, 0x0, TVO_VIP_HDMI);
0748 }
0749 
0750 static const struct drm_encoder_helper_funcs sti_hdmi_encoder_helper_funcs = {
0751     .dpms = sti_tvout_encoder_dpms,
0752     .mode_set = sti_tvout_encoder_mode_set,
0753     .commit = sti_hdmi_encoder_enable,
0754     .disable = sti_hdmi_encoder_disable,
0755 };
0756 
0757 static struct drm_encoder *sti_tvout_create_hdmi_encoder(struct drm_device *dev,
0758         struct sti_tvout *tvout)
0759 {
0760     struct sti_tvout_encoder *encoder;
0761     struct drm_encoder *drm_encoder;
0762 
0763     encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
0764     if (!encoder)
0765         return NULL;
0766 
0767     encoder->tvout = tvout;
0768 
0769     drm_encoder = &encoder->encoder;
0770 
0771     drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
0772 
0773     drm_encoder_init(dev, drm_encoder,
0774             &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_TMDS, NULL);
0775 
0776     drm_encoder_helper_add(drm_encoder, &sti_hdmi_encoder_helper_funcs);
0777 
0778     return drm_encoder;
0779 }
0780 
0781 static void sti_tvout_create_encoders(struct drm_device *dev,
0782         struct sti_tvout *tvout)
0783 {
0784     tvout->hdmi = sti_tvout_create_hdmi_encoder(dev, tvout);
0785     tvout->hda = sti_tvout_create_hda_encoder(dev, tvout);
0786     tvout->dvo = sti_tvout_create_dvo_encoder(dev, tvout);
0787 
0788     tvout->hdmi->possible_clones = drm_encoder_mask(tvout->hdmi) |
0789         drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
0790     tvout->hda->possible_clones = drm_encoder_mask(tvout->hdmi) |
0791         drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
0792     tvout->dvo->possible_clones = drm_encoder_mask(tvout->hdmi) |
0793         drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
0794 }
0795 
0796 static void sti_tvout_destroy_encoders(struct sti_tvout *tvout)
0797 {
0798     if (tvout->hdmi)
0799         drm_encoder_cleanup(tvout->hdmi);
0800     tvout->hdmi = NULL;
0801 
0802     if (tvout->hda)
0803         drm_encoder_cleanup(tvout->hda);
0804     tvout->hda = NULL;
0805 
0806     if (tvout->dvo)
0807         drm_encoder_cleanup(tvout->dvo);
0808     tvout->dvo = NULL;
0809 }
0810 
0811 static int sti_tvout_bind(struct device *dev, struct device *master, void *data)
0812 {
0813     struct sti_tvout *tvout = dev_get_drvdata(dev);
0814     struct drm_device *drm_dev = data;
0815 
0816     tvout->drm_dev = drm_dev;
0817 
0818     sti_tvout_create_encoders(drm_dev, tvout);
0819 
0820     return 0;
0821 }
0822 
0823 static void sti_tvout_unbind(struct device *dev, struct device *master,
0824     void *data)
0825 {
0826     struct sti_tvout *tvout = dev_get_drvdata(dev);
0827 
0828     sti_tvout_destroy_encoders(tvout);
0829 }
0830 
0831 static const struct component_ops sti_tvout_ops = {
0832     .bind   = sti_tvout_bind,
0833     .unbind = sti_tvout_unbind,
0834 };
0835 
0836 static int sti_tvout_probe(struct platform_device *pdev)
0837 {
0838     struct device *dev = &pdev->dev;
0839     struct device_node *node = dev->of_node;
0840     struct sti_tvout *tvout;
0841     struct resource *res;
0842 
0843     DRM_INFO("%s\n", __func__);
0844 
0845     if (!node)
0846         return -ENODEV;
0847 
0848     tvout = devm_kzalloc(dev, sizeof(*tvout), GFP_KERNEL);
0849     if (!tvout)
0850         return -ENOMEM;
0851 
0852     tvout->dev = dev;
0853 
0854     /* get memory resources */
0855     res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tvout-reg");
0856     if (!res) {
0857         DRM_ERROR("Invalid glue resource\n");
0858         return -ENOMEM;
0859     }
0860     tvout->regs = devm_ioremap(dev, res->start, resource_size(res));
0861     if (!tvout->regs)
0862         return -ENOMEM;
0863 
0864     /* get reset resources */
0865     tvout->reset = devm_reset_control_get(dev, "tvout");
0866     /* take tvout out of reset */
0867     if (!IS_ERR(tvout->reset))
0868         reset_control_deassert(tvout->reset);
0869 
0870     platform_set_drvdata(pdev, tvout);
0871 
0872     return component_add(dev, &sti_tvout_ops);
0873 }
0874 
0875 static int sti_tvout_remove(struct platform_device *pdev)
0876 {
0877     component_del(&pdev->dev, &sti_tvout_ops);
0878     return 0;
0879 }
0880 
0881 static const struct of_device_id tvout_of_match[] = {
0882     { .compatible = "st,stih407-tvout", },
0883     { /* end node */ }
0884 };
0885 MODULE_DEVICE_TABLE(of, tvout_of_match);
0886 
0887 struct platform_driver sti_tvout_driver = {
0888     .driver = {
0889         .name = "sti-tvout",
0890         .owner = THIS_MODULE,
0891         .of_match_table = tvout_of_match,
0892     },
0893     .probe = sti_tvout_probe,
0894     .remove = sti_tvout_remove,
0895 };
0896 
0897 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
0898 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
0899 MODULE_LICENSE("GPL");
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