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 = 6,
  28         .subdev_desc = {
  29                         {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
  30                         {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
  31                         {STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
  32                         {STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
  33                         {STI_VID_SUBDEV, (int)STI_VID_0, 0x700},
  34                         {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
  35         },
  36 };
  37
  38 /*
  39  * stiH416 compositor properties
  40  * Note:
  41  * on stih416 MIXER_AUX has a different base address from MIXER_MAIN
  42  * Moreover, GDPx is different for Main and Aux Mixer. So this subdev map does
  43  * not fit for stiH416 if we want to enable the MIXER_AUX.
  44  */
  45 struct sti_compositor_data stih416_compositor_data = {
  46         .nb_subdev = 3,
  47         .subdev_desc = {
  48                         {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
  49                         {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
  50                         {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00}
  51         },
  52 };
  53
  54 static int sti_compositor_init_subdev(struct sti_compositor *compo,
  55                 struct sti_compositor_subdev_descriptor *desc,
  56                 unsigned int array_size)
  57 {
  58         unsigned int i, mixer_id = 0, layer_id = 0;
  59
  60         for (i = 0; i < array_size; i++) {
  61                 switch (desc[i].type) {
  62                 case STI_MIXER_MAIN_SUBDEV:
  63                 case STI_MIXER_AUX_SUBDEV:
  64                         compo->mixer[mixer_id++] =
  65                             sti_mixer_create(compo->dev, desc[i].id,
  66                                              compo->regs + desc[i].offset);
  67                         break;
  68                 case STI_GPD_SUBDEV:
  69                 case STI_VID_SUBDEV:
  70                         compo->layer[layer_id++] =
  71                             sti_layer_create(compo->dev, desc[i].id,
  72                                              compo->regs + desc[i].offset);
  73                         break;
  74                         /* case STI_CURSOR_SUBDEV : TODO */
  75                 default:
  76                         DRM_ERROR("Unknow subdev compoment type\n");
  77                         return 1;
  78                 }
  79
  80         }
  81         compo->nb_mixers = mixer_id;
  82         compo->nb_layers = layer_id;
  83
  84         return 0;
  85 }
  86
  87 static int sti_compositor_bind(struct device *dev, struct device *master,
  88         void *data)
  89 {
  90         struct sti_compositor *compo = dev_get_drvdata(dev);
  91         struct drm_device *drm_dev = data;
  92         unsigned int i, crtc = 0, plane = 0;
  93         struct sti_drm_private *dev_priv = drm_dev->dev_private;
  94         struct drm_plane *cursor = NULL;
  95         struct drm_plane *primary = NULL;
  96
  97         dev_priv->compo = compo;
  98
  99         for (i = 0; i < compo->nb_layers; i++) {
 100                 if (compo->layer[i]) {
 101                         enum sti_layer_desc desc = compo->layer[i]->desc;
 102                         enum sti_layer_type type = desc & STI_LAYER_TYPE_MASK;
 103                         enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
 104
 105                         if (compo->mixer[crtc])
 106                                 plane_type = DRM_PLANE_TYPE_PRIMARY;
 107
 108                         switch (type) {
 109                         case STI_CUR:
 110                                 cursor = sti_drm_plane_init(drm_dev,
 111                                                 compo->layer[i],
 112                                                 (1 << crtc) - 1,
 113                                                 DRM_PLANE_TYPE_CURSOR);
 114                                 break;
 115                         case STI_GDP:
 116                         case STI_VID:
 117                                 primary = sti_drm_plane_init(drm_dev,
 118                                                 compo->layer[i],
 119                                                 (1 << crtc) - 1, plane_type);
 120                                 plane++;
 121                                 break;
 122                         case STI_BCK:
 123                                 break;
 124                         }
 125
 126                         /* The first planes are reserved for primary planes*/
 127                         if (compo->mixer[crtc]) {
 128                                 sti_drm_crtc_init(drm_dev, compo->mixer[crtc],
 129                                                 primary, cursor);
 130                                 crtc++;
 131                                 cursor = NULL;
 132                         }
 133                 }
 134         }
 135
 136         drm_vblank_init(drm_dev, crtc);
 137         /* Allow usage of vblank without having to call drm_irq_install */
 138         drm_dev->irq_enabled = 1;
 139
 140         DRM_DEBUG_DRIVER("Initialized %d DRM CRTC(s) and %d DRM plane(s)\n",
 141                          crtc, plane);
 142         DRM_DEBUG_DRIVER("DRM plane(s) for VID/VDP not created yet\n");
 143
 144         return 0;
 145 }
 146
 147 static void sti_compositor_unbind(struct device *dev, struct device *master,
 148         void *data)
 149 {
 150         /* do nothing */
 151 }
 152
 153 static const struct component_ops sti_compositor_ops = {
 154         .bind   = sti_compositor_bind,
 155         .unbind = sti_compositor_unbind,
 156 };
 157
 158 static const struct of_device_id compositor_of_match[] = {
 159         {
 160                 .compatible = "st,stih416-compositor",
 161                 .data = &stih416_compositor_data,
 162         }, {
 163                 .compatible = "st,stih407-compositor",
 164                 .data = &stih407_compositor_data,
 165         }, {
 166                 /* end node */
 167         }
 168 };
 169 MODULE_DEVICE_TABLE(of, compositor_of_match);
 170
 171 static int sti_compositor_probe(struct platform_device *pdev)
 172 {
 173         struct device *dev = &pdev->dev;
 174         struct device_node *np = dev->of_node;
 175         struct device_node *vtg_np;
 176         struct sti_compositor *compo;
 177         struct resource *res;
 178         int err;
 179
 180         compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
 181         if (!compo) {
 182                 DRM_ERROR("Failed to allocate compositor context\n");
 183                 return -ENOMEM;
 184         }
 185         compo->dev = dev;
 186         compo->vtg_vblank_nb.notifier_call = sti_drm_crtc_vblank_cb;
 187
 188         /* populate data structure depending on compatibility */
 189         BUG_ON(!of_match_node(compositor_of_match, np)->data);
 190
 191         memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
 192                sizeof(struct sti_compositor_data));
 193
 194         /* Get Memory ressources */
 195         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 196         if (res == NULL) {
 197                 DRM_ERROR("Get memory resource failed\n");
 198                 return -ENXIO;
 199         }
 200         compo->regs = devm_ioremap(dev, res->start, resource_size(res));
 201         if (compo->regs == NULL) {
 202                 DRM_ERROR("Register mapping failed\n");
 203                 return -ENXIO;
 204         }
 205
 206         /* Get clock resources */
 207         compo->clk_compo_main = devm_clk_get(dev, "compo_main");
 208         if (IS_ERR(compo->clk_compo_main)) {
 209                 DRM_ERROR("Cannot get compo_main clock\n");
 210                 return PTR_ERR(compo->clk_compo_main);
 211         }
 212
 213         compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
 214         if (IS_ERR(compo->clk_compo_aux)) {
 215                 DRM_ERROR("Cannot get compo_aux clock\n");
 216                 return PTR_ERR(compo->clk_compo_aux);
 217         }
 218
 219         compo->clk_pix_main = devm_clk_get(dev, "pix_main");
 220         if (IS_ERR(compo->clk_pix_main)) {
 221                 DRM_ERROR("Cannot get pix_main clock\n");
 222                 return PTR_ERR(compo->clk_pix_main);
 223         }
 224
 225         compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
 226         if (IS_ERR(compo->clk_pix_aux)) {
 227                 DRM_ERROR("Cannot get pix_aux clock\n");
 228                 return PTR_ERR(compo->clk_pix_aux);
 229         }
 230
 231         /* Get reset resources */
 232         compo->rst_main = devm_reset_control_get(dev, "compo-main");
 233         /* Take compo main out of reset */
 234         if (!IS_ERR(compo->rst_main))
 235                 reset_control_deassert(compo->rst_main);
 236
 237         compo->rst_aux = devm_reset_control_get(dev, "compo-aux");
 238         /* Take compo aux out of reset */
 239         if (!IS_ERR(compo->rst_aux))
 240                 reset_control_deassert(compo->rst_aux);
 241
 242         vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
 243         if (vtg_np)
 244                 compo->vtg_main = of_vtg_find(vtg_np);
 245
 246         vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
 247         if (vtg_np)
 248                 compo->vtg_aux = of_vtg_find(vtg_np);
 249
 250         /* Initialize compositor subdevices */
 251         err = sti_compositor_init_subdev(compo, compo->data.subdev_desc,
 252                                          compo->data.nb_subdev);
 253         if (err)
 254                 return err;
 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 static struct platform_driver sti_compositor_driver = {
 268         .driver = {
 269                 .name = "sti-compositor",
 270                 .owner = THIS_MODULE,
 271                 .of_match_table = compositor_of_match,
 272         },
 273         .probe = sti_compositor_probe,
 274         .remove = sti_compositor_remove,
 275 };
 276
 277 module_platform_driver(sti_compositor_driver);
 278
 279 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 280 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 281 MODULE_LICENSE("GPL");