drivers/gpu/drm/sun4i/sun4i_layer.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2015 Free Electrons
   4  * Copyright (C) 2015 NextThing Co
   5  *
   6  * Maxime Ripard <maxime.ripard@free-electrons.com>
   7  */
   8
   9 #include <drm/drm_atomic_helper.h>
  10 #include <drm/drm_gem_framebuffer_helper.h>
  11 #include <drm/drm_plane_helper.h>
  12
  13 #include "sun4i_backend.h"
  14 #include "sun4i_frontend.h"
  15 #include "sun4i_layer.h"
  16 #include "sunxi_engine.h"
  17
  18 static void sun4i_backend_layer_reset(struct drm_plane *plane)
  19 {
  20         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  21         struct sun4i_layer_state *state;
  22
  23         if (plane->state) {
  24                 state = state_to_sun4i_layer_state(plane->state);
  25
  26                 __drm_atomic_helper_plane_destroy_state(&state->state);
  27
  28                 kfree(state);
  29                 plane->state = NULL;
  30         }
  31
  32         state = kzalloc(sizeof(*state), GFP_KERNEL);
  33         if (state) {
  34                 __drm_atomic_helper_plane_reset(plane, &state->state);
  35                 plane->state->zpos = layer->id;
  36         }
  37 }
  38
  39 static struct drm_plane_state *
  40 sun4i_backend_layer_duplicate_state(struct drm_plane *plane)
  41 {
  42         struct sun4i_layer_state *orig = state_to_sun4i_layer_state(plane->state);
  43         struct sun4i_layer_state *copy;
  44
  45         copy = kzalloc(sizeof(*copy), GFP_KERNEL);
  46         if (!copy)
  47                 return NULL;
  48
  49         __drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
  50         copy->uses_frontend = orig->uses_frontend;
  51
  52         return &copy->state;
  53 }
  54
  55 static void sun4i_backend_layer_destroy_state(struct drm_plane *plane,
  56                                               struct drm_plane_state *state)
  57 {
  58         struct sun4i_layer_state *s_state = state_to_sun4i_layer_state(state);
  59
  60         __drm_atomic_helper_plane_destroy_state(state);
  61
  62         kfree(s_state);
  63 }
  64
  65 static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
  66                                                struct drm_plane_state *old_state)
  67 {
  68         struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(old_state);
  69         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  70         struct sun4i_backend *backend = layer->backend;
  71
  72         sun4i_backend_layer_enable(backend, layer->id, false);
  73
  74         if (layer_state->uses_frontend) {
  75                 unsigned long flags;
  76
  77                 spin_lock_irqsave(&backend->frontend_lock, flags);
  78                 backend->frontend_teardown = true;
  79                 spin_unlock_irqrestore(&backend->frontend_lock, flags);
  80         }
  81 }
  82
  83 static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
  84                                               struct drm_plane_state *old_state)
  85 {
  86         struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(plane->state);
  87         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  88         struct sun4i_backend *backend = layer->backend;
  89         struct sun4i_frontend *frontend = backend->frontend;
  90
  91         sun4i_backend_cleanup_layer(backend, layer->id);
  92
  93         if (layer_state->uses_frontend) {
  94                 sun4i_frontend_init(frontend);
  95                 sun4i_frontend_update_coord(frontend, plane);
  96                 sun4i_frontend_update_buffer(frontend, plane);
  97                 sun4i_frontend_update_formats(frontend, plane,
  98                                               DRM_FORMAT_XRGB8888);
  99                 sun4i_backend_update_layer_frontend(backend, layer->id,
 100                                                     DRM_FORMAT_XRGB8888);
 101                 sun4i_frontend_enable(frontend);
 102         } else {
 103                 sun4i_backend_update_layer_formats(backend, layer->id, plane);
 104                 sun4i_backend_update_layer_buffer(backend, layer->id, plane);
 105         }
 106
 107         sun4i_backend_update_layer_coord(backend, layer->id, plane);
 108         sun4i_backend_update_layer_zpos(backend, layer->id, plane);
 109         sun4i_backend_layer_enable(backend, layer->id, true);
 110 }
 111
 112 static bool sun4i_layer_format_mod_supported(struct drm_plane *plane,
 113                                              uint32_t format, uint64_t modifier)
 114 {
 115         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
 116
 117         if (IS_ERR_OR_NULL(layer->backend->frontend))
 118                 sun4i_backend_format_is_supported(format, modifier);
 119
 120         return sun4i_backend_format_is_supported(format, modifier) ||
 121                sun4i_frontend_format_is_supported(format, modifier);
 122 }
 123
 124 static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
 125         .prepare_fb     = drm_gem_fb_prepare_fb,
 126         .atomic_disable = sun4i_backend_layer_atomic_disable,
 127         .atomic_update  = sun4i_backend_layer_atomic_update,
 128 };
 129
 130 static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
 131         .atomic_destroy_state   = sun4i_backend_layer_destroy_state,
 132         .atomic_duplicate_state = sun4i_backend_layer_duplicate_state,
 133         .destroy                = drm_plane_cleanup,
 134         .disable_plane          = drm_atomic_helper_disable_plane,
 135         .reset                  = sun4i_backend_layer_reset,
 136         .update_plane           = drm_atomic_helper_update_plane,
 137         .format_mod_supported   = sun4i_layer_format_mod_supported,
 138 };
 139
 140 static const uint32_t sun4i_layer_formats[] = {
 141         DRM_FORMAT_ARGB8888,
 142         DRM_FORMAT_ARGB4444,
 143         DRM_FORMAT_ARGB1555,
 144         DRM_FORMAT_BGRX8888,
 145         DRM_FORMAT_RGBA5551,
 146         DRM_FORMAT_RGBA4444,
 147         DRM_FORMAT_RGB888,
 148         DRM_FORMAT_RGB565,
 149         DRM_FORMAT_NV12,
 150         DRM_FORMAT_NV16,
 151         DRM_FORMAT_NV21,
 152         DRM_FORMAT_NV61,
 153         DRM_FORMAT_UYVY,
 154         DRM_FORMAT_VYUY,
 155         DRM_FORMAT_XRGB8888,
 156         DRM_FORMAT_YUV411,
 157         DRM_FORMAT_YUV420,
 158         DRM_FORMAT_YUV422,
 159         DRM_FORMAT_YUV444,
 160         DRM_FORMAT_YUYV,
 161         DRM_FORMAT_YVU411,
 162         DRM_FORMAT_YVU420,
 163         DRM_FORMAT_YVU422,
 164         DRM_FORMAT_YVU444,
 165         DRM_FORMAT_YVYU,
 166 };
 167
 168 static const uint32_t sun4i_backend_layer_formats[] = {
 169         DRM_FORMAT_ARGB8888,
 170         DRM_FORMAT_ARGB4444,
 171         DRM_FORMAT_ARGB1555,
 172         DRM_FORMAT_RGBA5551,
 173         DRM_FORMAT_RGBA4444,
 174         DRM_FORMAT_RGB888,
 175         DRM_FORMAT_RGB565,
 176         DRM_FORMAT_UYVY,
 177         DRM_FORMAT_VYUY,
 178         DRM_FORMAT_XRGB8888,
 179         DRM_FORMAT_YUYV,
 180         DRM_FORMAT_YVYU,
 181 };
 182
 183 static const uint64_t sun4i_layer_modifiers[] = {
 184         DRM_FORMAT_MOD_LINEAR,
 185         DRM_FORMAT_MOD_ALLWINNER_TILED,
 186         DRM_FORMAT_MOD_INVALID
 187 };
 188
 189 static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
 190                                                 struct sun4i_backend *backend,
 191                                                 enum drm_plane_type type)
 192 {
 193         const uint64_t *modifiers = sun4i_layer_modifiers;
 194         const uint32_t *formats = sun4i_layer_formats;
 195         unsigned int formats_len = ARRAY_SIZE(sun4i_layer_formats);
 196         struct sun4i_layer *layer;
 197         int ret;
 198
 199         layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
 200         if (!layer)
 201                 return ERR_PTR(-ENOMEM);
 202
 203         layer->backend = backend;
 204
 205         if (IS_ERR_OR_NULL(backend->frontend)) {
 206                 formats = sun4i_backend_layer_formats;
 207                 formats_len = ARRAY_SIZE(sun4i_backend_layer_formats);
 208                 modifiers = NULL;
 209         }
 210
 211         /* possible crtcs are set later */
 212         ret = drm_universal_plane_init(drm, &layer->plane, 0,
 213                                        &sun4i_backend_layer_funcs,
 214                                        formats, formats_len,
 215                                        modifiers, type, NULL);
 216         if (ret) {
 217                 dev_err(drm->dev, "Couldn't initialize layer\n");
 218                 return ERR_PTR(ret);
 219         }
 220
 221         drm_plane_helper_add(&layer->plane,
 222                              &sun4i_backend_layer_helper_funcs);
 223
 224         drm_plane_create_alpha_property(&layer->plane);
 225         drm_plane_create_zpos_property(&layer->plane, 0, 0,
 226                                        SUN4I_BACKEND_NUM_LAYERS - 1);
 227
 228         return layer;
 229 }
 230
 231 struct drm_plane **sun4i_layers_init(struct drm_device *drm,
 232                                      struct sunxi_engine *engine)
 233 {
 234         struct drm_plane **planes;
 235         struct sun4i_backend *backend = engine_to_sun4i_backend(engine);
 236         int i;
 237
 238         /* We need to have a sentinel at the need, hence the overallocation */
 239         planes = devm_kcalloc(drm->dev, SUN4I_BACKEND_NUM_LAYERS + 1,
 240                               sizeof(*planes), GFP_KERNEL);
 241         if (!planes)
 242                 return ERR_PTR(-ENOMEM);
 243
 244         for (i = 0; i < SUN4I_BACKEND_NUM_LAYERS; i++) {
 245                 enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY;
 246                 struct sun4i_layer *layer;
 247
 248                 layer = sun4i_layer_init_one(drm, backend, type);
 249                 if (IS_ERR(layer)) {
 250                         dev_err(drm->dev, "Couldn't initialize %s plane\n",
 251                                 i ? "overlay" : "primary");
 252                         return ERR_CAST(layer);
 253                 };
 254
 255                 layer->id = i;
 256                 planes[i] = &layer->plane;
 257         };
 258
 259         return planes;
 260 }