drivers/gpu/drm/sti/sti_drm_plane.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 "sti_compositor.h"
  10 #include "sti_drm_drv.h"
  11 #include "sti_drm_plane.h"
  12 #include "sti_vtg.h"
  13
  14 enum sti_layer_desc sti_layer_default_zorder[] = {
  15         STI_GDP_0,
  16         STI_VID_0,
  17         STI_GDP_1,
  18         STI_VID_1,
  19         STI_GDP_2,
  20         STI_GDP_3,
  21 };
  22
  23 /* (Background) < GDP0 < VID0 < GDP1 < VID1 < GDP2 < GDP3 < (ForeGround) */
  24
  25 static int
  26 sti_drm_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
  27                      struct drm_framebuffer *fb, int crtc_x, int crtc_y,
  28                      unsigned int crtc_w, unsigned int crtc_h,
  29                      uint32_t src_x, uint32_t src_y,
  30                      uint32_t src_w, uint32_t src_h)
  31 {
  32         struct sti_layer *layer = to_sti_layer(plane);
  33         struct sti_mixer *mixer = to_sti_mixer(crtc);
  34         int res;
  35
  36         DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s) drm fb:%d\n",
  37                       crtc->base.id, sti_mixer_to_str(mixer),
  38                       plane->base.id, sti_layer_to_str(layer), fb->base.id);
  39         DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", crtc_w, crtc_h, crtc_x, crtc_y);
  40
  41         res = sti_mixer_set_layer_depth(mixer, layer);
  42         if (res) {
  43                 DRM_ERROR("Can not set layer depth\n");
  44                 return res;
  45         }
  46
  47         /* src_x are in 16.16 format. */
  48         res = sti_layer_prepare(layer, crtc, fb,
  49                         &crtc->mode, mixer->id,
  50                         crtc_x, crtc_y, crtc_w, crtc_h,
  51                         src_x >> 16, src_y >> 16,
  52                         src_w >> 16, src_h >> 16);
  53         if (res) {
  54                 DRM_ERROR("Layer prepare failed\n");
  55                 return res;
  56         }
  57
  58         res = sti_layer_commit(layer);
  59         if (res) {
  60                 DRM_ERROR("Layer commit failed\n");
  61                 return res;
  62         }
  63
  64         res = sti_mixer_set_layer_status(mixer, layer, true);
  65         if (res) {
  66                 DRM_ERROR("Can not enable layer at mixer\n");
  67                 return res;
  68         }
  69
  70         return 0;
  71 }
  72
  73 static int sti_drm_disable_plane(struct drm_plane *plane)
  74 {
  75         struct sti_layer *layer;
  76         struct sti_mixer *mixer;
  77         int lay_res, mix_res;
  78
  79         if (!plane->crtc) {
  80                 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", plane->base.id);
  81                 return 0;
  82         }
  83         layer = to_sti_layer(plane);
  84         mixer = to_sti_mixer(plane->crtc);
  85
  86         DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
  87                         plane->crtc->base.id, sti_mixer_to_str(mixer),
  88                         plane->base.id, sti_layer_to_str(layer));
  89
  90         /* Disable layer at mixer level */
  91         mix_res = sti_mixer_set_layer_status(mixer, layer, false);
  92         if (mix_res)
  93                 DRM_ERROR("Can not disable layer at mixer\n");
  94
  95         /* Wait a while to be sure that a Vsync event is received */
  96         msleep(WAIT_NEXT_VSYNC_MS);
  97
  98         /* Then disable layer itself */
  99         lay_res = sti_layer_disable(layer);
 100         if (lay_res)
 101                 DRM_ERROR("Layer disable failed\n");
 102
 103         if (lay_res || mix_res)
 104                 return -EINVAL;
 105
 106         return 0;
 107 }
 108
 109 static void sti_drm_plane_destroy(struct drm_plane *plane)
 110 {
 111         DRM_DEBUG_DRIVER("\n");
 112
 113         sti_drm_disable_plane(plane);
 114         drm_plane_cleanup(plane);
 115 }
 116
 117 static int sti_drm_plane_set_property(struct drm_plane *plane,
 118                                       struct drm_property *property,
 119                                       uint64_t val)
 120 {
 121         struct drm_device *dev = plane->dev;
 122         struct sti_drm_private *private = dev->dev_private;
 123         struct sti_layer *layer = to_sti_layer(plane);
 124
 125         DRM_DEBUG_DRIVER("\n");
 126
 127         if (property == private->plane_zorder_property) {
 128                 layer->zorder = val;
 129                 return 0;
 130         }
 131
 132         return -EINVAL;
 133 }
 134
 135 static struct drm_plane_funcs sti_drm_plane_funcs = {
 136         .update_plane = sti_drm_update_plane,
 137         .disable_plane = sti_drm_disable_plane,
 138         .destroy = sti_drm_plane_destroy,
 139         .set_property = sti_drm_plane_set_property,
 140 };
 141
 142 static void sti_drm_plane_attach_zorder_property(struct drm_plane *plane,
 143                                                  uint64_t default_val)
 144 {
 145         struct drm_device *dev = plane->dev;
 146         struct sti_drm_private *private = dev->dev_private;
 147         struct drm_property *prop;
 148         struct sti_layer *layer = to_sti_layer(plane);
 149
 150         prop = private->plane_zorder_property;
 151         if (!prop) {
 152                 prop = drm_property_create_range(dev, 0, "zpos", 0,
 153                                                  GAM_MIXER_NB_DEPTH_LEVEL - 1);
 154                 if (!prop)
 155                         return;
 156
 157                 private->plane_zorder_property = prop;
 158         }
 159
 160         drm_object_attach_property(&plane->base, prop, default_val);
 161         layer->zorder = default_val;
 162 }
 163
 164 struct drm_plane *sti_drm_plane_init(struct drm_device *dev,
 165                                      struct sti_layer *layer,
 166                                      unsigned int possible_crtcs,
 167                                      enum drm_plane_type type)
 168 {
 169         int err, i;
 170         uint64_t default_zorder = 0;
 171
 172         err = drm_universal_plane_init(dev, &layer->plane, possible_crtcs,
 173                              &sti_drm_plane_funcs,
 174                              sti_layer_get_formats(layer),
 175                              sti_layer_get_nb_formats(layer), type);
 176         if (err) {
 177                 DRM_ERROR("Failed to initialize plane\n");
 178                 return NULL;
 179         }
 180
 181         for (i = 0; i < ARRAY_SIZE(sti_layer_default_zorder); i++)
 182                 if (sti_layer_default_zorder[i] == layer->desc)
 183                         break;
 184
 185         default_zorder = i;
 186
 187         if (type == DRM_PLANE_TYPE_OVERLAY)
 188                 sti_drm_plane_attach_zorder_property(&layer->plane,
 189                                 default_zorder);
 190
 191         DRM_DEBUG_DRIVER("drm plane:%d mapped to %s with zorder:%llu\n",
 192                          layer->plane.base.id,
 193                          sti_layer_to_str(layer), default_zorder);
 194
 195         return &layer->plane;
 196 }
 197 EXPORT_SYMBOL(sti_drm_plane_init);