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