drivers/gpu/drm/sti/sti_compositor.c

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