drivers/gpu/drm/sun4i/sun4i_layer.c

   1 /*
   2  * Copyright (C) 2015 Free Electrons
   3  * Copyright (C) 2015 NextThing Co
   4  *
   5  * Maxime Ripard <[email protected]>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  */
  12
  13 #include <drm/drm_atomic_helper.h>
  14 #include <drm/drm_plane_helper.h>
  15 #include <drm/drmP.h>
  16
  17 #include "sun4i_backend.h"
  18 #include "sun4i_frontend.h"
  19 #include "sun4i_layer.h"
  20 #include "sunxi_engine.h"
  21
  22 static void sun4i_backend_layer_reset(struct drm_plane *plane)
  23 {
  24         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  25         struct sun4i_layer_state *state;
  26
  27         if (plane->state) {
  28                 state = state_to_sun4i_layer_state(plane->state);
  29
  30                 __drm_atomic_helper_plane_destroy_state(&state->state);
  31
  32                 kfree(state);
  33                 plane->state = NULL;
  34         }
  35
  36         state = kzalloc(sizeof(*state), GFP_KERNEL);
  37         if (state) {
  38                 plane->state = &state->state;
  39                 plane->state->plane = plane;
  40                 plane->state->zpos = layer->id;
  41         }
  42 }
  43
  44 static struct drm_plane_state *
  45 sun4i_backend_layer_duplicate_state(struct drm_plane *plane)
  46 {
  47         struct sun4i_layer_state *orig = state_to_sun4i_layer_state(plane->state);
  48         struct sun4i_layer_state *copy;
  49
  50         copy = kzalloc(sizeof(*copy), GFP_KERNEL);
  51         if (!copy)
  52                 return NULL;
  53
  54         __drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
  55         copy->uses_frontend = orig->uses_frontend;
  56
  57         return &copy->state;
  58 }
  59
  60 static void sun4i_backend_layer_destroy_state(struct drm_plane *plane,
  61                                               struct drm_plane_state *state)
  62 {
  63         struct sun4i_layer_state *s_state = state_to_sun4i_layer_state(state);
  64
  65         __drm_atomic_helper_plane_destroy_state(state);
  66
  67         kfree(s_state);
  68 }
  69
  70 static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
  71                                                struct drm_plane_state *old_state)
  72 {
  73         struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(old_state);
  74         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  75         struct sun4i_backend *backend = layer->backend;
  76
  77         sun4i_backend_layer_enable(backend, layer->id, false);
  78
  79         if (layer_state->uses_frontend) {
  80                 unsigned long flags;
  81
  82                 spin_lock_irqsave(&backend->frontend_lock, flags);
  83                 backend->frontend_teardown = true;
  84                 spin_unlock_irqrestore(&backend->frontend_lock, flags);
  85         }
  86 }
  87
  88 static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
  89                                               struct drm_plane_state *old_state)
  90 {
  91         struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(plane->state);
  92         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  93         struct sun4i_backend *backend = layer->backend;
  94         struct sun4i_frontend *frontend = backend->frontend;
  95
  96         if (layer_state->uses_frontend) {
  97                 sun4i_frontend_init(frontend);
  98                 sun4i_frontend_update_coord(frontend, plane);
  99                 sun4i_frontend_update_buffer(frontend, plane);
 100                 sun4i_frontend_update_formats(frontend, plane,
 101                                               DRM_FORMAT_ARGB8888);
 102                 sun4i_backend_update_layer_frontend(backend, layer->id,
 103                                                     DRM_FORMAT_ARGB8888);
 104                 sun4i_frontend_enable(frontend);
 105         } else {
 106                 sun4i_backend_update_layer_formats(backend, layer->id, plane);
 107                 sun4i_backend_update_layer_buffer(backend, layer->id, plane);
 108         }
 109
 110         sun4i_backend_update_layer_coord(backend, layer->id, plane);
 111         sun4i_backend_update_layer_zpos(backend, layer->id, plane);
 112         sun4i_backend_layer_enable(backend, layer->id, true);
 113 }
 114
 115 static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
 116         .atomic_disable = sun4i_backend_layer_atomic_disable,
 117         .atomic_update  = sun4i_backend_layer_atomic_update,
 118 };
 119
 120 static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
 121         .atomic_destroy_state   = sun4i_backend_layer_destroy_state,
 122         .atomic_duplicate_state = sun4i_backend_layer_duplicate_state,
 123         .destroy                = drm_plane_cleanup,
 124         .disable_plane          = drm_atomic_helper_disable_plane,
 125         .reset                  = sun4i_backend_layer_reset,
 126         .update_plane           = drm_atomic_helper_update_plane,
 127 };
 128
 129 static const uint32_t sun4i_backend_layer_formats[] = {
 130         DRM_FORMAT_ARGB8888,
 131         DRM_FORMAT_ARGB4444,
 132         DRM_FORMAT_ARGB1555,
 133         DRM_FORMAT_RGBA5551,
 134         DRM_FORMAT_RGBA4444,
 135         DRM_FORMAT_RGB888,
 136         DRM_FORMAT_RGB565,
 137         DRM_FORMAT_UYVY,
 138         DRM_FORMAT_VYUY,
 139         DRM_FORMAT_XRGB8888,
 140         DRM_FORMAT_YUYV,
 141         DRM_FORMAT_YVYU,
 142 };
 143
 144 static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
 145                                                 struct sun4i_backend *backend,
 146                                                 enum drm_plane_type type)
 147 {
 148         struct sun4i_layer *layer;
 149         int ret;
 150
 151         layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
 152         if (!layer)
 153                 return ERR_PTR(-ENOMEM);
 154
 155         /* possible crtcs are set later */
 156         ret = drm_universal_plane_init(drm, &layer->plane, 0,
 157                                        &sun4i_backend_layer_funcs,
 158                                        sun4i_backend_layer_formats,
 159                                        ARRAY_SIZE(sun4i_backend_layer_formats),
 160                                        NULL, type, NULL);
 161         if (ret) {
 162                 dev_err(drm->dev, "Couldn't initialize layer\n");
 163                 return ERR_PTR(ret);
 164         }
 165
 166         drm_plane_helper_add(&layer->plane,
 167                              &sun4i_backend_layer_helper_funcs);
 168         layer->backend = backend;
 169
 170         drm_plane_create_zpos_property(&layer->plane, 0, 0,
 171                                        SUN4I_BACKEND_NUM_LAYERS - 1);
 172
 173         return layer;
 174 }
 175
 176 struct drm_plane **sun4i_layers_init(struct drm_device *drm,
 177                                      struct sunxi_engine *engine)
 178 {
 179         struct drm_plane **planes;
 180         struct sun4i_backend *backend = engine_to_sun4i_backend(engine);
 181         int i;
 182
 183         /* We need to have a sentinel at the need, hence the overallocation */
 184         planes = devm_kcalloc(drm->dev, SUN4I_BACKEND_NUM_LAYERS + 1,
 185                               sizeof(*planes), GFP_KERNEL);
 186         if (!planes)
 187                 return ERR_PTR(-ENOMEM);
 188
 189         for (i = 0; i < SUN4I_BACKEND_NUM_LAYERS; i++) {
 190                 enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY;
 191                 struct sun4i_layer *layer;
 192
 193                 layer = sun4i_layer_init_one(drm, backend, type);
 194                 if (IS_ERR(layer)) {
 195                         dev_err(drm->dev, "Couldn't initialize %s plane\n",
 196                                 i ? "overlay" : "primary");
 197                         return ERR_CAST(layer);
 198                 };
 199
 200                 layer->id = i;
 201                 planes[i] = &layer->plane;
 202         };
 203
 204         return planes;
 205 }