drivers/gpu/drm/sti/sti_compositor.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) STMicroelectronics SA 2014
   4  * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
   5  *          Fabien Dessenne <fabien.dessenne@st.com>
   6  *          for STMicroelectronics.
   7  */
   8
   9 #include <linux/component.h>
  10 #include <linux/io.h>
  11 #include <linux/module.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/reset.h>
  14
  15 #include <drm/drm_device.h>
  16 #include <drm/drm_print.h>
  17 #include <drm/drm_vblank.h>
  18
  19 #include "sti_compositor.h"
  20 #include "sti_crtc.h"
  21 #include "sti_cursor.h"
  22 #include "sti_drv.h"
  23 #include "sti_gdp.h"
  24 #include "sti_plane.h"
  25 #include "sti_vid.h"
  26 #include "sti_vtg.h"
  27
  28 /*
  29  * stiH407 compositor properties
  30  */
  31 static const struct sti_compositor_data stih407_compositor_data = {
  32         .nb_subdev = 8,
  33         .subdev_desc = {
  34                         {STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000},
  35                         {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
  36                         {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
  37                         {STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
  38                         {STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
  39                         {STI_VID_SUBDEV, (int)STI_HQVDP_0, 0x700},
  40                         {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00},
  41                         {STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00},
  42         },
  43 };
  44
  45 void sti_compositor_debugfs_init(struct sti_compositor *compo,
  46                                  struct drm_minor *minor)
  47 {
  48         unsigned int i;
  49
  50         for (i = 0; i < STI_MAX_VID; i++)
  51                 if (compo->vid[i])
  52                         vid_debugfs_init(compo->vid[i], minor);
  53
  54         for (i = 0; i < STI_MAX_MIXER; i++)
  55                 if (compo->mixer[i])
  56                         sti_mixer_debugfs_init(compo->mixer[i], minor);
  57 }
  58
  59 static int sti_compositor_bind(struct device *dev,
  60                                struct device *master,
  61                                void *data)
  62 {
  63         struct sti_compositor *compo = dev_get_drvdata(dev);
  64         struct drm_device *drm_dev = data;
  65         unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
  66         struct sti_private *dev_priv = drm_dev->dev_private;
  67         struct drm_plane *cursor = NULL;
  68         struct drm_plane *primary = NULL;
  69         struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
  70         unsigned int array_size = compo->data.nb_subdev;
  71
  72         dev_priv->compo = compo;
  73
  74         /* Register mixer subdev and video subdev first */
  75         for (i = 0; i < array_size; i++) {
  76                 switch (desc[i].type) {
  77                 case STI_VID_SUBDEV:
  78                         compo->vid[vid_id++] =
  79                             sti_vid_create(compo->dev, drm_dev, desc[i].id,
  80                                            compo->regs + desc[i].offset);
  81                         break;
  82                 case STI_MIXER_MAIN_SUBDEV:
  83                 case STI_MIXER_AUX_SUBDEV:
  84                         compo->mixer[mixer_id++] =
  85                             sti_mixer_create(compo->dev, drm_dev, desc[i].id,
  86                                              compo->regs + desc[i].offset);
  87                         break;
  88                 case STI_GPD_SUBDEV:
  89                 case STI_CURSOR_SUBDEV:
  90                         /* Nothing to do, wait for the second round */
  91                         break;
  92                 default:
  93                         DRM_ERROR("Unknown subdev component type\n");
  94                         return 1;
  95                 }
  96         }
  97
  98         /* Register the other subdevs, create crtc and planes */
  99         for (i = 0; i < array_size; i++) {
 100                 enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
 101
 102                 if (crtc_id < mixer_id)
 103                         plane_type = DRM_PLANE_TYPE_PRIMARY;
 104
 105                 switch (desc[i].type) {
 106                 case STI_MIXER_MAIN_SUBDEV:
 107                 case STI_MIXER_AUX_SUBDEV:
 108                 case STI_VID_SUBDEV:
 109                         /* Nothing to do, already done at the first round */
 110                         break;
 111                 case STI_CURSOR_SUBDEV:
 112                         cursor = sti_cursor_create(drm_dev, compo->dev,
 113                                                    desc[i].id,
 114                                                    compo->regs + desc[i].offset,
 115                                                    1);
 116                         if (!cursor) {
 117                                 DRM_ERROR("Can't create CURSOR plane\n");
 118                                 break;
 119                         }
 120                         break;
 121                 case STI_GPD_SUBDEV:
 122                         primary = sti_gdp_create(drm_dev, compo->dev,
 123                                                  desc[i].id,
 124                                                  compo->regs + desc[i].offset,
 125                                                  (1 << mixer_id) - 1,
 126                                                  plane_type);
 127                         if (!primary) {
 128                                 DRM_ERROR("Can't create GDP plane\n");
 129                                 break;
 130                         }
 131                         break;
 132                 default:
 133                         DRM_ERROR("Unknown subdev component type\n");
 134                         return 1;
 135                 }
 136
 137                 /* The first planes are reserved for primary planes*/
 138                 if (crtc_id < mixer_id && primary) {
 139                         sti_crtc_init(drm_dev, compo->mixer[crtc_id],
 140                                       primary, cursor);
 141                         crtc_id++;
 142                         cursor = NULL;
 143                         primary = NULL;
 144                 }
 145         }
 146
 147         drm_vblank_init(drm_dev, crtc_id);
 148         /* Allow usage of vblank without having to call drm_irq_install */
 149         drm_dev->irq_enabled = 1;
 150
 151         return 0;
 152 }
 153
 154 static void sti_compositor_unbind(struct device *dev, struct device *master,
 155         void *data)
 156 {
 157         /* do nothing */
 158 }
 159
 160 static const struct component_ops sti_compositor_ops = {
 161         .bind   = sti_compositor_bind,
 162         .unbind = sti_compositor_unbind,
 163 };
 164
 165 static const struct of_device_id compositor_of_match[] = {
 166         {
 167                 .compatible = "st,stih407-compositor",
 168                 .data = &stih407_compositor_data,
 169         }, {
 170                 /* end node */
 171         }
 172 };
 173 MODULE_DEVICE_TABLE(of, compositor_of_match);
 174
 175 static int sti_compositor_probe(struct platform_device *pdev)
 176 {
 177         struct device *dev = &pdev->dev;
 178         struct device_node *np = dev->of_node;
 179         struct device_node *vtg_np;
 180         struct sti_compositor *compo;
 181         struct resource *res;
 182         unsigned int i;
 183
 184         compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
 185         if (!compo) {
 186                 DRM_ERROR("Failed to allocate compositor context\n");
 187                 return -ENOMEM;
 188         }
 189         compo->dev = dev;
 190         for (i = 0; i < STI_MAX_MIXER; i++)
 191                 compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb;
 192
 193         /* populate data structure depending on compatibility */
 194         BUG_ON(!of_match_node(compositor_of_match, np)->data);
 195
 196         memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
 197                sizeof(struct sti_compositor_data));
 198
 199         /* Get Memory ressources */
 200         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 201         if (res == NULL) {
 202                 DRM_ERROR("Get memory resource failed\n");
 203                 return -ENXIO;
 204         }
 205         compo->regs = devm_ioremap(dev, res->start, resource_size(res));
 206         if (compo->regs == NULL) {
 207                 DRM_ERROR("Register mapping failed\n");
 208                 return -ENXIO;
 209         }
 210
 211         /* Get clock resources */
 212         compo->clk_compo_main = devm_clk_get(dev, "compo_main");
 213         if (IS_ERR(compo->clk_compo_main)) {
 214                 DRM_ERROR("Cannot get compo_main clock\n");
 215                 return PTR_ERR(compo->clk_compo_main);
 216         }
 217
 218         compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
 219         if (IS_ERR(compo->clk_compo_aux)) {
 220                 DRM_ERROR("Cannot get compo_aux clock\n");
 221                 return PTR_ERR(compo->clk_compo_aux);
 222         }
 223
 224         compo->clk_pix_main = devm_clk_get(dev, "pix_main");
 225         if (IS_ERR(compo->clk_pix_main)) {
 226                 DRM_ERROR("Cannot get pix_main clock\n");
 227                 return PTR_ERR(compo->clk_pix_main);
 228         }
 229
 230         compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
 231         if (IS_ERR(compo->clk_pix_aux)) {
 232                 DRM_ERROR("Cannot get pix_aux clock\n");
 233                 return PTR_ERR(compo->clk_pix_aux);
 234         }
 235
 236         /* Get reset resources */
 237         compo->rst_main = devm_reset_control_get_shared(dev, "compo-main");
 238         /* Take compo main out of reset */
 239         if (!IS_ERR(compo->rst_main))
 240                 reset_control_deassert(compo->rst_main);
 241
 242         compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux");
 243         /* Take compo aux out of reset */
 244         if (!IS_ERR(compo->rst_aux))
 245                 reset_control_deassert(compo->rst_aux);
 246
 247         vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
 248         if (vtg_np)
 249                 compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np);
 250         of_node_put(vtg_np);
 251
 252         vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
 253         if (vtg_np)
 254                 compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np);
 255         of_node_put(vtg_np);
 256
 257         platform_set_drvdata(pdev, compo);
 258
 259         return component_add(&pdev->dev, &sti_compositor_ops);
 260 }
 261
 262 static int sti_compositor_remove(struct platform_device *pdev)
 263 {
 264         component_del(&pdev->dev, &sti_compositor_ops);
 265         return 0;
 266 }
 267
 268 struct platform_driver sti_compositor_driver = {
 269         .driver = {
 270                 .name = "sti-compositor",
 271                 .of_match_table = compositor_of_match,
 272         },
 273         .probe = sti_compositor_probe,
 274         .remove = sti_compositor_remove,
 275 };
 276
 277 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 278 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 279 MODULE_LICENSE("GPL");