drm/sti/sti_compositor.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Copyright (C) STMicroelectronics SA 2014
0004  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
0005  *          Fabien Dessenne <fabien.dessenne@st.com>
0006  *          for STMicroelectronics.
0007  */
0008
0009 #include <linux/component.h>
0010 #include <linux/io.h>
0011 #include <linux/module.h>
0012 #include <linux/of.h>
0013 #include <linux/platform_device.h>
0014 #include <linux/reset.h>
0015
0016 #include <drm/drm_device.h>
0017 #include <drm/drm_print.h>
0018 #include <drm/drm_vblank.h>
0019
0020 #include "sti_compositor.h"
0021 #include "sti_crtc.h"
0022 #include "sti_cursor.h"
0023 #include "sti_drv.h"
0024 #include "sti_gdp.h"
0025 #include "sti_plane.h"
0026 #include "sti_vid.h"
0027 #include "sti_vtg.h"
0028
0029 /*
0030  * stiH407 compositor properties
0031  */
0032 static const struct sti_compositor_data stih407_compositor_data = {
0033     .nb_subdev = 8,
0034     .subdev_desc = {
0035             {STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000},
0036             {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
0037             {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
0038             {STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
0039             {STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
0040             {STI_VID_SUBDEV, (int)STI_HQVDP_0, 0x700},
0041             {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00},
0042             {STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00},
0043     },
0044 };
0045
0046 void sti_compositor_debugfs_init(struct sti_compositor *compo,
0047                  struct drm_minor *minor)
0048 {
0049     unsigned int i;
0050
0051     for (i = 0; i < STI_MAX_VID; i++)
0052         if (compo->vid[i])
0053             vid_debugfs_init(compo->vid[i], minor);
0054
0055     for (i = 0; i < STI_MAX_MIXER; i++)
0056         if (compo->mixer[i])
0057             sti_mixer_debugfs_init(compo->mixer[i], minor);
0058 }
0059
0060 static int sti_compositor_bind(struct device *dev,
0061                    struct device *master,
0062                    void *data)
0063 {
0064     struct sti_compositor *compo = dev_get_drvdata(dev);
0065     struct drm_device *drm_dev = data;
0066     unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
0067     struct sti_private *dev_priv = drm_dev->dev_private;
0068     struct drm_plane *cursor = NULL;
0069     struct drm_plane *primary = NULL;
0070     struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
0071     unsigned int array_size = compo->data.nb_subdev;
0072
0073     dev_priv->compo = compo;
0074
0075     /* Register mixer subdev and video subdev first */
0076     for (i = 0; i < array_size; i++) {
0077         switch (desc[i].type) {
0078         case STI_VID_SUBDEV:
0079             compo->vid[vid_id++] =
0080                 sti_vid_create(compo->dev, drm_dev, desc[i].id,
0081                        compo->regs + desc[i].offset);
0082             break;
0083         case STI_MIXER_MAIN_SUBDEV:
0084         case STI_MIXER_AUX_SUBDEV:
0085             compo->mixer[mixer_id++] =
0086                 sti_mixer_create(compo->dev, drm_dev, desc[i].id,
0087                          compo->regs + desc[i].offset);
0088             break;
0089         case STI_GPD_SUBDEV:
0090         case STI_CURSOR_SUBDEV:
0091             /* Nothing to do, wait for the second round */
0092             break;
0093         default:
0094             DRM_ERROR("Unknown subdev component type\n");
0095             return 1;
0096         }
0097     }
0098
0099     /* Register the other subdevs, create crtc and planes */
0100     for (i = 0; i < array_size; i++) {
0101         enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
0102
0103         if (crtc_id < mixer_id)
0104             plane_type = DRM_PLANE_TYPE_PRIMARY;
0105
0106         switch (desc[i].type) {
0107         case STI_MIXER_MAIN_SUBDEV:
0108         case STI_MIXER_AUX_SUBDEV:
0109         case STI_VID_SUBDEV:
0110             /* Nothing to do, already done at the first round */
0111             break;
0112         case STI_CURSOR_SUBDEV:
0113             cursor = sti_cursor_create(drm_dev, compo->dev,
0114                            desc[i].id,
0115                            compo->regs + desc[i].offset,
0116                            1);
0117             if (!cursor) {
0118                 DRM_ERROR("Can't create CURSOR plane\n");
0119                 break;
0120             }
0121             break;
0122         case STI_GPD_SUBDEV:
0123             primary = sti_gdp_create(drm_dev, compo->dev,
0124                          desc[i].id,
0125                          compo->regs + desc[i].offset,
0126                          (1 << mixer_id) - 1,
0127                          plane_type);
0128             if (!primary) {
0129                 DRM_ERROR("Can't create GDP plane\n");
0130                 break;
0131             }
0132             break;
0133         default:
0134             DRM_ERROR("Unknown subdev component type\n");
0135             return 1;
0136         }
0137
0138         /* The first planes are reserved for primary planes*/
0139         if (crtc_id < mixer_id && primary) {
0140             sti_crtc_init(drm_dev, compo->mixer[crtc_id],
0141                       primary, cursor);
0142             crtc_id++;
0143             cursor = NULL;
0144             primary = NULL;
0145         }
0146     }
0147
0148     drm_vblank_init(drm_dev, crtc_id);
0149
0150     return 0;
0151 }
0152
0153 static void sti_compositor_unbind(struct device *dev, struct device *master,
0154     void *data)
0155 {
0156     /* do nothing */
0157 }
0158
0159 static const struct component_ops sti_compositor_ops = {
0160     .bind   = sti_compositor_bind,
0161     .unbind = sti_compositor_unbind,
0162 };
0163
0164 static const struct of_device_id compositor_of_match[] = {
0165     {
0166         .compatible = "st,stih407-compositor",
0167         .data = &stih407_compositor_data,
0168     }, {
0169         /* end node */
0170     }
0171 };
0172 MODULE_DEVICE_TABLE(of, compositor_of_match);
0173
0174 static int sti_compositor_probe(struct platform_device *pdev)
0175 {
0176     struct device *dev = &pdev->dev;
0177     struct device_node *np = dev->of_node;
0178     struct device_node *vtg_np;
0179     struct sti_compositor *compo;
0180     struct resource *res;
0181     unsigned int i;
0182
0183     compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
0184     if (!compo) {
0185         DRM_ERROR("Failed to allocate compositor context\n");
0186         return -ENOMEM;
0187     }
0188     compo->dev = dev;
0189     for (i = 0; i < STI_MAX_MIXER; i++)
0190         compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb;
0191
0192     /* populate data structure depending on compatibility */
0193     BUG_ON(!of_match_node(compositor_of_match, np)->data);
0194
0195     memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
0196            sizeof(struct sti_compositor_data));
0197
0198     /* Get Memory ressources */
0199     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
0200     if (res == NULL) {
0201         DRM_ERROR("Get memory resource failed\n");
0202         return -ENXIO;
0203     }
0204     compo->regs = devm_ioremap(dev, res->start, resource_size(res));
0205     if (compo->regs == NULL) {
0206         DRM_ERROR("Register mapping failed\n");
0207         return -ENXIO;
0208     }
0209
0210     /* Get clock resources */
0211     compo->clk_compo_main = devm_clk_get(dev, "compo_main");
0212     if (IS_ERR(compo->clk_compo_main)) {
0213         DRM_ERROR("Cannot get compo_main clock\n");
0214         return PTR_ERR(compo->clk_compo_main);
0215     }
0216
0217     compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
0218     if (IS_ERR(compo->clk_compo_aux)) {
0219         DRM_ERROR("Cannot get compo_aux clock\n");
0220         return PTR_ERR(compo->clk_compo_aux);
0221     }
0222
0223     compo->clk_pix_main = devm_clk_get(dev, "pix_main");
0224     if (IS_ERR(compo->clk_pix_main)) {
0225         DRM_ERROR("Cannot get pix_main clock\n");
0226         return PTR_ERR(compo->clk_pix_main);
0227     }
0228
0229     compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
0230     if (IS_ERR(compo->clk_pix_aux)) {
0231         DRM_ERROR("Cannot get pix_aux clock\n");
0232         return PTR_ERR(compo->clk_pix_aux);
0233     }
0234
0235     /* Get reset resources */
0236     compo->rst_main = devm_reset_control_get_shared(dev, "compo-main");
0237     /* Take compo main out of reset */
0238     if (!IS_ERR(compo->rst_main))
0239         reset_control_deassert(compo->rst_main);
0240
0241     compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux");
0242     /* Take compo aux out of reset */
0243     if (!IS_ERR(compo->rst_aux))
0244         reset_control_deassert(compo->rst_aux);
0245
0246     vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
0247     if (vtg_np)
0248         compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np);
0249     of_node_put(vtg_np);
0250
0251     vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
0252     if (vtg_np)
0253         compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np);
0254     of_node_put(vtg_np);
0255
0256     platform_set_drvdata(pdev, compo);
0257
0258     return component_add(&pdev->dev, &sti_compositor_ops);
0259 }
0260
0261 static int sti_compositor_remove(struct platform_device *pdev)
0262 {
0263     component_del(&pdev->dev, &sti_compositor_ops);
0264     return 0;
0265 }
0266
0267 struct platform_driver sti_compositor_driver = {
0268     .driver = {
0269         .name = "sti-compositor",
0270         .of_match_table = compositor_of_match,
0271     },
0272     .probe = sti_compositor_probe,
0273     .remove = sti_compositor_remove,
0274 };
0275
0276 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
0277 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
0278 MODULE_LICENSE("GPL");