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_drm_crtc.h"
  18 #include "sti_drm_drv.h"
  19 #include "sti_drm_plane.h"
  20 #include "sti_gdp.h"
  21 #include "sti_vtg.h"
  22
  23 /*
  24  * stiH407 compositor properties
  25  */
  26 struct sti_compositor_data stih407_compositor_data = {
  27         .nb_subdev = 8,
  28         .subdev_desc = {
  29                         {STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000},
  30                         {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
  31                         {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
  32                         {STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
  33                         {STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
  34                         {STI_VID_SUBDEV, (int)STI_VID_0, 0x700},
  35                         {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00},
  36                         {STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00},
  37         },
  38 };
  39
  40 /*
  41  * stiH416 compositor properties
  42  * Note:
  43  * on stih416 MIXER_AUX has a different base address from MIXER_MAIN
  44  * Moreover, GDPx is different for Main and Aux Mixer. So this subdev map does
  45  * not fit for stiH416 if we want to enable the MIXER_AUX.
  46  */
  47 struct sti_compositor_data stih416_compositor_data = {
  48         .nb_subdev = 3,
  49         .subdev_desc = {
  50                         {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
  51                         {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
  52                         {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
  53         },
  54 };
  55
  56 static int sti_compositor_init_subdev(struct sti_compositor *compo,
  57                 struct sti_compositor_subdev_descriptor *desc,
  58                 unsigned int array_size)
  59 {
  60         unsigned int i, mixer_id = 0, layer_id = 0;
  61
  62         for (i = 0; i < array_size; i++) {
  63                 switch (desc[i].type) {
  64                 case STI_MIXER_MAIN_SUBDEV:
  65                 case STI_MIXER_AUX_SUBDEV:
  66                         compo->mixer[mixer_id++] =
  67                             sti_mixer_create(compo->dev, desc[i].id,
  68                                              compo->regs + desc[i].offset);
  69                         break;
  70                 case STI_GPD_SUBDEV:
  71                 case STI_VID_SUBDEV:
  72                 case STI_CURSOR_SUBDEV:
  73                         compo->layer[layer_id++] =
  74                             sti_layer_create(compo->dev, desc[i].id,
  75                                              compo->regs + desc[i].offset);
  76                         break;
  77                 default:
  78                         DRM_ERROR("Unknow subdev compoment type\n");
  79                         return 1;
  80                 }
  81
  82         }
  83         compo->nb_mixers = mixer_id;
  84         compo->nb_layers = layer_id;
  85
  86         return 0;
  87 }
  88
  89 static int sti_compositor_bind(struct device *dev, struct device *master,
  90         void *data)
  91 {
  92         struct sti_compositor *compo = dev_get_drvdata(dev);
  93         struct drm_device *drm_dev = data;
  94         unsigned int i, crtc = 0, plane = 0;
  95         struct sti_drm_private *dev_priv = drm_dev->dev_private;
  96         struct drm_plane *cursor = NULL;
  97         struct drm_plane *primary = NULL;
  98
  99         dev_priv->compo = compo;
 100
 101         for (i = 0; i < compo->nb_layers; i++) {
 102                 if (compo->layer[i]) {
 103                         enum sti_layer_desc desc = compo->layer[i]->desc;
 104                         enum sti_layer_type type = desc & STI_LAYER_TYPE_MASK;
 105                         enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
 106
 107                         if (crtc < compo->nb_mixers)
 108                                 plane_type = DRM_PLANE_TYPE_PRIMARY;
 109
 110                         switch (type) {
 111                         case STI_CUR:
 112                                 cursor = sti_drm_plane_init(drm_dev,
 113                                                 compo->layer[i],
 114                                                 1, DRM_PLANE_TYPE_CURSOR);
 115                                 break;
 116                         case STI_GDP:
 117                         case STI_VID:
 118                                 primary = sti_drm_plane_init(drm_dev,
 119                                                 compo->layer[i],
 120                                                 (1 << compo->nb_mixers) - 1,
 121                                                 plane_type);
 122                                 plane++;
 123                                 break;
 124                         case STI_BCK:
 125                         case STI_VDP:
 126                                 break;
 127                         }
 128
 129                         /* The first planes are reserved for primary planes*/
 130                         if (crtc < compo->nb_mixers && primary) {
 131                                 sti_drm_crtc_init(drm_dev, compo->mixer[crtc],
 132                                                 primary, cursor);
 133                                 crtc++;
 134                                 cursor = NULL;
 135                                 primary = NULL;
 136                         }
 137                 }
 138         }
 139
 140         drm_vblank_init(drm_dev, crtc);
 141         /* Allow usage of vblank without having to call drm_irq_install */
 142         drm_dev->irq_enabled = 1;
 143
 144         DRM_DEBUG_DRIVER("Initialized %d DRM CRTC(s) and %d DRM plane(s)\n",
 145                          crtc, plane);
 146         DRM_DEBUG_DRIVER("DRM plane(s) for VID/VDP not created yet\n");
 147
 148         return 0;
 149 }
 150
 151 static void sti_compositor_unbind(struct device *dev, struct device *master,
 152         void *data)
 153 {
 154         /* do nothing */
 155 }
 156
 157 static const struct component_ops sti_compositor_ops = {
 158         .bind   = sti_compositor_bind,
 159         .unbind = sti_compositor_unbind,
 160 };
 161
 162 static const struct of_device_id compositor_of_match[] = {
 163         {
 164                 .compatible = "st,stih416-compositor",
 165                 .data = &stih416_compositor_data,
 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         int err;
 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         compo->vtg_vblank_nb.notifier_call = sti_drm_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(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(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_main = of_vtg_find(vtg_np);
 249
 250         vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
 251         if (vtg_np)
 252                 compo->vtg_aux = of_vtg_find(vtg_np);
 253
 254         /* Initialize compositor subdevices */
 255         err = sti_compositor_init_subdev(compo, compo->data.subdev_desc,
 256                                          compo->data.nb_subdev);
 257         if (err)
 258                 return err;
 259
 260         platform_set_drvdata(pdev, compo);
 261
 262         return component_add(&pdev->dev, &sti_compositor_ops);
 263 }
 264
 265 static int sti_compositor_remove(struct platform_device *pdev)
 266 {
 267         component_del(&pdev->dev, &sti_compositor_ops);
 268         return 0;
 269 }
 270
 271 static struct platform_driver sti_compositor_driver = {
 272         .driver = {
 273                 .name = "sti-compositor",
 274                 .of_match_table = compositor_of_match,
 275         },
 276         .probe = sti_compositor_probe,
 277         .remove = sti_compositor_remove,
 278 };
 279
 280 module_platform_driver(sti_compositor_driver);
 281
 282 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 283 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 284 MODULE_LICENSE("GPL");