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 <[email protected]>
   7  */
   8
   9 #include <drm/drm_atomic_helper.h>
  10 #include <drm/drm_plane_helper.h>
  11 #include <drm/drm_gem_framebuffer_helper.h>
  12 #include <drm/drmP.h>
  13
  14 #include "sun4i_backend.h"
  15 #include "sun4i_frontend.h"
  16 #include "sun4i_layer.h"
  17 #include "sunxi_engine.h"
  18
  19 static void sun4i_backend_layer_reset(struct drm_plane *plane)
  20 {
  21         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  22         struct sun4i_layer_state *state;
  23
  24         if (plane->state) {
  25                 state = state_to_sun4i_layer_state(plane->state);
  26
  27                 __drm_atomic_helper_plane_destroy_state(&state->state);
  28
  29                 kfree(state);
  30                 plane->state = NULL;
  31         }
  32
  33         state = kzalloc(sizeof(*state), GFP_KERNEL);
  34         if (state) {
  35                 __drm_atomic_helper_plane_reset(plane, &state->state);
  36                 plane->state->zpos = layer->id;
  37         }
  38 }
  39
  40 static struct drm_plane_state *
  41 sun4i_backend_layer_duplicate_state(struct drm_plane *plane)
  42 {
  43         struct sun4i_layer_state *orig = state_to_sun4i_layer_state(plane->state);
  44         struct sun4i_layer_state *copy;
  45
  46         copy = kzalloc(sizeof(*copy), GFP_KERNEL);
  47         if (!copy)
  48                 return NULL;
  49
  50         __drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
  51         copy->uses_frontend = orig->uses_frontend;
  52
  53         return &copy->state;
  54 }
  55
  56 static void sun4i_backend_layer_destroy_state(struct drm_plane *plane,
  57                                               struct drm_plane_state *state)
  58 {
  59         struct sun4i_layer_state *s_state = state_to_sun4i_layer_state(state);
  60
  61         __drm_atomic_helper_plane_destroy_state(state);
  62
  63         kfree(s_state);
  64 }
  65
  66 static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
  67                                                struct drm_plane_state *old_state)
  68 {
  69         struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(old_state);
  70         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  71         struct sun4i_backend *backend = layer->backend;
  72
  73         sun4i_backend_layer_enable(backend, layer->id, false);
  74
  75         if (layer_state->uses_frontend) {
  76                 unsigned long flags;
  77
  78                 spin_lock_irqsave(&backend->frontend_lock, flags);
  79                 backend->frontend_teardown = true;
  80                 spin_unlock_irqrestore(&backend->frontend_lock, flags);
  81         }
  82 }
  83
  84 static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
  85                                               struct drm_plane_state *old_state)
  86 {
  87         struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(plane->state);
  88         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  89         struct sun4i_backend *backend = layer->backend;
  90         struct sun4i_frontend *frontend = backend->frontend;
  91
  92         sun4i_backend_cleanup_layer(backend, layer->id);
  93
  94         if (layer_state->uses_frontend) {
  95                 sun4i_frontend_init(frontend);
  96                 sun4i_frontend_update_coord(frontend, plane);
  97                 sun4i_frontend_update_buffer(frontend, plane);
  98                 sun4i_frontend_update_formats(frontend, plane,
  99                                               DRM_FORMAT_XRGB8888);
 100                 sun4i_backend_update_layer_frontend(backend, layer->id,
 101                                                     DRM_FORMAT_XRGB8888);
 102                 sun4i_frontend_enable(frontend);
 103         } else {
 104                 sun4i_backend_update_layer_formats(backend, layer->id, plane);
 105                 sun4i_backend_update_layer_buffer(backend, layer->id, plane);
 106         }
 107
 108         sun4i_backend_update_layer_coord(backend, layer->id, plane);
 109         sun4i_backend_update_layer_zpos(backend, layer->id, plane);
 110         sun4i_backend_layer_enable(backend, layer->id, true);
 111 }
 112
 113 static bool sun4i_layer_format_mod_supported(struct drm_plane *plane,
 114                                              uint32_t format, uint64_t modifier)
 115 {
 116         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
 117
 118         if (IS_ERR_OR_NULL(layer->backend->frontend))
 119                 sun4i_backend_format_is_supported(format, modifier);
 120
 121         return sun4i_backend_format_is_supported(format, modifier) ||
 122                sun4i_frontend_format_is_supported(format, modifier);
 123 }
 124
 125 static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
 126         .prepare_fb     = drm_gem_fb_prepare_fb,
 127         .atomic_disable = sun4i_backend_layer_atomic_disable,
 128         .atomic_update  = sun4i_backend_layer_atomic_update,
 129 };
 130
 131 static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
 132         .atomic_destroy_state   = sun4i_backend_layer_destroy_state,
 133         .atomic_duplicate_state = sun4i_backend_layer_duplicate_state,
 134         .destroy                = drm_plane_cleanup,
 135         .disable_plane          = drm_atomic_helper_disable_plane,
 136         .reset                  = sun4i_backend_layer_reset,
 137         .update_plane           = drm_atomic_helper_update_plane,
 138         .format_mod_supported   = sun4i_layer_format_mod_supported,
 139 };
 140
 141 static const uint32_t sun4i_layer_formats[] = {
 142         DRM_FORMAT_ARGB8888,
 143         DRM_FORMAT_ARGB4444,
 144         DRM_FORMAT_ARGB1555,
 145         DRM_FORMAT_BGRX8888,
 146         DRM_FORMAT_RGBA5551,
 147         DRM_FORMAT_RGBA4444,
 148         DRM_FORMAT_RGB888,
 149         DRM_FORMAT_RGB565,
 150         DRM_FORMAT_NV12,
 151         DRM_FORMAT_NV16,
 152         DRM_FORMAT_NV21,
 153         DRM_FORMAT_NV61,
 154         DRM_FORMAT_UYVY,
 155         DRM_FORMAT_VYUY,
 156         DRM_FORMAT_XRGB8888,
 157         DRM_FORMAT_YUV411,
 158         DRM_FORMAT_YUV420,
 159         DRM_FORMAT_YUV422,
 160         DRM_FORMAT_YUV444,
 161         DRM_FORMAT_YUYV,
 162         DRM_FORMAT_YVU411,
 163         DRM_FORMAT_YVU420,
 164         DRM_FORMAT_YVU422,
 165         DRM_FORMAT_YVU444,
 166         DRM_FORMAT_YVYU,
 167 };
 168
 169 static const uint32_t sun4i_backend_layer_formats[] = {
 170         DRM_FORMAT_ARGB8888,
 171         DRM_FORMAT_ARGB4444,
 172         DRM_FORMAT_ARGB1555,
 173         DRM_FORMAT_RGBA5551,
 174         DRM_FORMAT_RGBA4444,
 175         DRM_FORMAT_RGB888,
 176         DRM_FORMAT_RGB565,
 177         DRM_FORMAT_UYVY,
 178         DRM_FORMAT_VYUY,
 179         DRM_FORMAT_XRGB8888,
 180         DRM_FORMAT_YUYV,
 181         DRM_FORMAT_YVYU,
 182 };
 183
 184 static const uint64_t sun4i_layer_modifiers[] = {
 185         DRM_FORMAT_MOD_LINEAR,
 186         DRM_FORMAT_MOD_ALLWINNER_TILED,
 187         DRM_FORMAT_MOD_INVALID
 188 };
 189
 190 static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
 191                                                 struct sun4i_backend *backend,
 192                                                 enum drm_plane_type type)
 193 {
 194         const uint64_t *modifiers = sun4i_layer_modifiers;
 195         const uint32_t *formats = sun4i_layer_formats;
 196         unsigned int formats_len = ARRAY_SIZE(sun4i_layer_formats);
 197         struct sun4i_layer *layer;
 198         int ret;
 199
 200         layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
 201         if (!layer)
 202                 return ERR_PTR(-ENOMEM);
 203
 204         layer->backend = backend;
 205
 206         if (IS_ERR_OR_NULL(backend->frontend)) {
 207                 formats = sun4i_backend_layer_formats;
 208                 formats_len = ARRAY_SIZE(sun4i_backend_layer_formats);
 209                 modifiers = NULL;
 210         }
 211
 212         /* possible crtcs are set later */
 213         ret = drm_universal_plane_init(drm, &layer->plane, 0,
 214                                        &sun4i_backend_layer_funcs,
 215                                        formats, formats_len,
 216                                        modifiers, type, NULL);
 217         if (ret) {
 218                 dev_err(drm->dev, "Couldn't initialize layer\n");
 219                 return ERR_PTR(ret);
 220         }
 221
 222         drm_plane_helper_add(&layer->plane,
 223                              &sun4i_backend_layer_helper_funcs);
 224
 225         drm_plane_create_alpha_property(&layer->plane);
 226         drm_plane_create_zpos_property(&layer->plane, 0, 0,
 227                                        SUN4I_BACKEND_NUM_LAYERS - 1);
 228
 229         return layer;
 230 }
 231
 232 struct drm_plane **sun4i_layers_init(struct drm_device *drm,
 233                                      struct sunxi_engine *engine)
 234 {
 235         struct drm_plane **planes;
 236         struct sun4i_backend *backend = engine_to_sun4i_backend(engine);
 237         int i;
 238
 239         /* We need to have a sentinel at the need, hence the overallocation */
 240         planes = devm_kcalloc(drm->dev, SUN4I_BACKEND_NUM_LAYERS + 1,
 241                               sizeof(*planes), GFP_KERNEL);
 242         if (!planes)
 243                 return ERR_PTR(-ENOMEM);
 244
 245         for (i = 0; i < SUN4I_BACKEND_NUM_LAYERS; i++) {
 246                 enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY;
 247                 struct sun4i_layer *layer;
 248
 249                 layer = sun4i_layer_init_one(drm, backend, type);
 250                 if (IS_ERR(layer)) {
 251                         dev_err(drm->dev, "Couldn't initialize %s plane\n",
 252                                 i ? "overlay" : "primary");
 253                         return ERR_CAST(layer);
 254                 };
 255
 256                 layer->id = i;
 257                 planes[i] = &layer->plane;
 258         };
 259
 260         return planes;
 261 }