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 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 /*
  43  * stiH416 compositor properties
  44  * Note:
  45  * on stih416 MIXER_AUX has a different base address from MIXER_MAIN
  46  * Moreover, GDPx is different for Main and Aux Mixer. So this subdev map does
  47  * not fit for stiH416 if we want to enable the MIXER_AUX.
  48  */
  49 struct sti_compositor_data stih416_compositor_data = {
  50         .nb_subdev = 3,
  51         .subdev_desc = {
  52                         {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
  53                         {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
  54                         {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
  55         },
  56 };
  57
  58 int sti_compositor_debufs_init(struct sti_compositor *compo,
  59                                struct drm_minor *minor)
  60 {
  61         int ret = 0, i;
  62
  63         for (i = 0; compo->vid[i]; i++) {
  64                 ret = vid_debugfs_init(compo->vid[i], minor);
  65                 if (ret)
  66                         return ret;
  67         }
  68
  69         for (i = 0; compo->mixer[i]; i++) {
  70                 ret = sti_mixer_debugfs_init(compo->mixer[i], minor);
  71                 if (ret)
  72                         return ret;
  73         }
  74
  75         return 0;
  76 }
  77
  78 static int sti_compositor_bind(struct device *dev,
  79                                struct device *master,
  80                                void *data)
  81 {
  82         struct sti_compositor *compo = dev_get_drvdata(dev);
  83         struct drm_device *drm_dev = data;
  84         unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
  85         struct sti_private *dev_priv = drm_dev->dev_private;
  86         struct drm_plane *cursor = NULL;
  87         struct drm_plane *primary = NULL;
  88         struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
  89         unsigned int array_size = compo->data.nb_subdev;
  90
  91         dev_priv->compo = compo;
  92
  93         /* Register mixer subdev and video subdev first */
  94         for (i = 0; i < array_size; i++) {
  95                 switch (desc[i].type) {
  96                 case STI_VID_SUBDEV:
  97                         compo->vid[vid_id++] =
  98                             sti_vid_create(compo->dev, drm_dev, desc[i].id,
  99                                            compo->regs + desc[i].offset);
 100                         break;
 101                 case STI_MIXER_MAIN_SUBDEV:
 102                 case STI_MIXER_AUX_SUBDEV:
 103                         compo->mixer[mixer_id++] =
 104                             sti_mixer_create(compo->dev, drm_dev, desc[i].id,
 105                                              compo->regs + desc[i].offset);
 106                         break;
 107                 case STI_GPD_SUBDEV:
 108                 case STI_CURSOR_SUBDEV:
 109                         /* Nothing to do, wait for the second round */
 110                         break;
 111                 default:
 112                         DRM_ERROR("Unknow subdev compoment type\n");
 113                         return 1;
 114                 }
 115         }
 116
 117         /* Register the other subdevs, create crtc and planes */
 118         for (i = 0; i < array_size; i++) {
 119                 enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
 120
 121                 if (crtc_id < mixer_id)
 122                         plane_type = DRM_PLANE_TYPE_PRIMARY;
 123
 124                 switch (desc[i].type) {
 125                 case STI_MIXER_MAIN_SUBDEV:
 126                 case STI_MIXER_AUX_SUBDEV:
 127                 case STI_VID_SUBDEV:
 128                         /* Nothing to do, already done at the first round */
 129                         break;
 130                 case STI_CURSOR_SUBDEV:
 131                         cursor = sti_cursor_create(drm_dev, compo->dev,
 132                                                    desc[i].id,
 133                                                    compo->regs + desc[i].offset,
 134                                                    1);
 135                         if (!cursor) {
 136                                 DRM_ERROR("Can't create CURSOR plane\n");
 137                                 break;
 138                         }
 139                         break;
 140                 case STI_GPD_SUBDEV:
 141                         primary = sti_gdp_create(drm_dev, compo->dev,
 142                                                  desc[i].id,
 143                                                  compo->regs + desc[i].offset,
 144                                                  (1 << mixer_id) - 1,
 145                                                  plane_type);
 146                         if (!primary) {
 147                                 DRM_ERROR("Can't create GDP plane\n");
 148                                 break;
 149                         }
 150                         break;
 151                 default:
 152                         DRM_ERROR("Unknown subdev compoment type\n");
 153                         return 1;
 154                 }
 155
 156                 /* The first planes are reserved for primary planes*/
 157                 if (crtc_id < mixer_id && primary) {
 158                         sti_crtc_init(drm_dev, compo->mixer[crtc_id],
 159                                       primary, cursor);
 160                         crtc_id++;
 161                         cursor = NULL;
 162                         primary = NULL;
 163                 }
 164         }
 165
 166         drm_vblank_init(drm_dev, crtc_id);
 167         /* Allow usage of vblank without having to call drm_irq_install */
 168         drm_dev->irq_enabled = 1;
 169
 170         return 0;
 171 }
 172
 173 static void sti_compositor_unbind(struct device *dev, struct device *master,
 174         void *data)
 175 {
 176         /* do nothing */
 177 }
 178
 179 static const struct component_ops sti_compositor_ops = {
 180         .bind   = sti_compositor_bind,
 181         .unbind = sti_compositor_unbind,
 182 };
 183
 184 static const struct of_device_id compositor_of_match[] = {
 185         {
 186                 .compatible = "st,stih416-compositor",
 187                 .data = &stih416_compositor_data,
 188         }, {
 189                 .compatible = "st,stih407-compositor",
 190                 .data = &stih407_compositor_data,
 191         }, {
 192                 /* end node */
 193         }
 194 };
 195 MODULE_DEVICE_TABLE(of, compositor_of_match);
 196
 197 static int sti_compositor_probe(struct platform_device *pdev)
 198 {
 199         struct device *dev = &pdev->dev;
 200         struct device_node *np = dev->of_node;
 201         struct device_node *vtg_np;
 202         struct sti_compositor *compo;
 203         struct resource *res;
 204
 205         compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
 206         if (!compo) {
 207                 DRM_ERROR("Failed to allocate compositor context\n");
 208                 return -ENOMEM;
 209         }
 210         compo->dev = dev;
 211         compo->vtg_vblank_nb.notifier_call = sti_crtc_vblank_cb;
 212
 213         /* populate data structure depending on compatibility */
 214         BUG_ON(!of_match_node(compositor_of_match, np)->data);
 215
 216         memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
 217                sizeof(struct sti_compositor_data));
 218
 219         /* Get Memory ressources */
 220         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 221         if (res == NULL) {
 222                 DRM_ERROR("Get memory resource failed\n");
 223                 return -ENXIO;
 224         }
 225         compo->regs = devm_ioremap(dev, res->start, resource_size(res));
 226         if (compo->regs == NULL) {
 227                 DRM_ERROR("Register mapping failed\n");
 228                 return -ENXIO;
 229         }
 230
 231         /* Get clock resources */
 232         compo->clk_compo_main = devm_clk_get(dev, "compo_main");
 233         if (IS_ERR(compo->clk_compo_main)) {
 234                 DRM_ERROR("Cannot get compo_main clock\n");
 235                 return PTR_ERR(compo->clk_compo_main);
 236         }
 237
 238         compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
 239         if (IS_ERR(compo->clk_compo_aux)) {
 240                 DRM_ERROR("Cannot get compo_aux clock\n");
 241                 return PTR_ERR(compo->clk_compo_aux);
 242         }
 243
 244         compo->clk_pix_main = devm_clk_get(dev, "pix_main");
 245         if (IS_ERR(compo->clk_pix_main)) {
 246                 DRM_ERROR("Cannot get pix_main clock\n");
 247                 return PTR_ERR(compo->clk_pix_main);
 248         }
 249
 250         compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
 251         if (IS_ERR(compo->clk_pix_aux)) {
 252                 DRM_ERROR("Cannot get pix_aux clock\n");
 253                 return PTR_ERR(compo->clk_pix_aux);
 254         }
 255
 256         /* Get reset resources */
 257         compo->rst_main = devm_reset_control_get_shared(dev, "compo-main");
 258         /* Take compo main out of reset */
 259         if (!IS_ERR(compo->rst_main))
 260                 reset_control_deassert(compo->rst_main);
 261
 262         compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux");
 263         /* Take compo aux out of reset */
 264         if (!IS_ERR(compo->rst_aux))
 265                 reset_control_deassert(compo->rst_aux);
 266
 267         vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
 268         if (vtg_np)
 269                 compo->vtg_main = of_vtg_find(vtg_np);
 270         of_node_put(vtg_np);
 271
 272         vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
 273         if (vtg_np)
 274                 compo->vtg_aux = of_vtg_find(vtg_np);
 275         of_node_put(vtg_np);
 276
 277         platform_set_drvdata(pdev, compo);
 278
 279         return component_add(&pdev->dev, &sti_compositor_ops);
 280 }
 281
 282 static int sti_compositor_remove(struct platform_device *pdev)
 283 {
 284         component_del(&pdev->dev, &sti_compositor_ops);
 285         return 0;
 286 }
 287
 288 struct platform_driver sti_compositor_driver = {
 289         .driver = {
 290                 .name = "sti-compositor",
 291                 .of_match_table = compositor_of_match,
 292         },
 293         .probe = sti_compositor_probe,
 294         .remove = sti_compositor_remove,
 295 };
 296
 297 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 298 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 299 MODULE_LICENSE("GPL");