kernel/drivers/gpu/drm/sti/sti_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 <drm/drmP.h>
  10 #include <drm/drm_fb_cma_helper.h>
  11 #include <drm/drm_gem_cma_helper.h>
  12
  13 #include "sti_compositor.h"
  14 #include "sti_drv.h"
  15 #include "sti_plane.h"
  16
  17 /* (Background) < GDP0 < GDP1 < HQVDP0 < GDP2 < GDP3 < (ForeGround) */
  18 enum sti_plane_desc sti_plane_default_zorder[] = {
  19         STI_GDP_0,
  20         STI_GDP_1,
  21         STI_HQVDP_0,
  22         STI_GDP_2,
  23         STI_GDP_3,
  24 };
  25
  26 const char *sti_plane_to_str(struct sti_plane *plane)
  27 {
  28         switch (plane->desc) {
  29         case STI_GDP_0:
  30                 return "GDP0";
  31         case STI_GDP_1:
  32                 return "GDP1";
  33         case STI_GDP_2:
  34                 return "GDP2";
  35         case STI_GDP_3:
  36                 return "GDP3";
  37         case STI_HQVDP_0:
  38                 return "HQVDP0";
  39         case STI_CURSOR:
  40                 return "CURSOR";
  41         default:
  42                 return "<UNKNOWN PLANE>";
  43         }
  44 }
  45
  46 static void sti_plane_destroy(struct drm_plane *drm_plane)
  47 {
  48         DRM_DEBUG_DRIVER("\n");
  49
  50         drm_plane_helper_disable(drm_plane);
  51         drm_plane_cleanup(drm_plane);
  52 }
  53
  54 static int sti_plane_set_property(struct drm_plane *drm_plane,
  55                                   struct drm_property *property,
  56                                   uint64_t val)
  57 {
  58         struct drm_device *dev = drm_plane->dev;
  59         struct sti_private *private = dev->dev_private;
  60         struct sti_plane *plane = to_sti_plane(drm_plane);
  61
  62         DRM_DEBUG_DRIVER("\n");
  63
  64         if (property == private->plane_zorder_property) {
  65                 plane->zorder = val;
  66                 return 0;
  67         }
  68
  69         return -EINVAL;
  70 }
  71
  72 static void sti_plane_attach_zorder_property(struct drm_plane *drm_plane)
  73 {
  74         struct drm_device *dev = drm_plane->dev;
  75         struct sti_private *private = dev->dev_private;
  76         struct sti_plane *plane = to_sti_plane(drm_plane);
  77         struct drm_property *prop;
  78
  79         prop = private->plane_zorder_property;
  80         if (!prop) {
  81                 prop = drm_property_create_range(dev, 0, "zpos", 1,
  82                                                  GAM_MIXER_NB_DEPTH_LEVEL);
  83                 if (!prop)
  84                         return;
  85
  86                 private->plane_zorder_property = prop;
  87         }
  88
  89         drm_object_attach_property(&drm_plane->base, prop, plane->zorder);
  90 }
  91
  92 void sti_plane_init_property(struct sti_plane *plane,
  93                              enum drm_plane_type type)
  94 {
  95         unsigned int i;
  96
  97         for (i = 0; i < ARRAY_SIZE(sti_plane_default_zorder); i++)
  98                 if (sti_plane_default_zorder[i] == plane->desc)
  99                         break;
 100
 101         plane->zorder = i + 1;
 102
 103         if (type == DRM_PLANE_TYPE_OVERLAY)
 104                 sti_plane_attach_zorder_property(&plane->drm_plane);
 105
 106         DRM_DEBUG_DRIVER("drm plane:%d mapped to %s with zorder:%d\n",
 107                          plane->drm_plane.base.id,
 108                          sti_plane_to_str(plane), plane->zorder);
 109 }
 110
 111 struct drm_plane_funcs sti_plane_helpers_funcs = {
 112         .update_plane = drm_atomic_helper_update_plane,
 113         .disable_plane = drm_atomic_helper_disable_plane,
 114         .destroy = sti_plane_destroy,
 115         .set_property = sti_plane_set_property,
 116         .reset = drm_atomic_helper_plane_reset,
 117         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 118         .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 119 };