drivers/gpu/drm/sun4i/sun4i_layer.c

   1 /*
   2  * Copyright (C) 2015 Free Electrons
   3  * Copyright (C) 2015 NextThing Co
   4  *
   5  * Maxime Ripard <maxime.ripard@free-electrons.com>
   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->alpha = DRM_BLEND_ALPHA_OPAQUE;
  41                 plane->state->zpos = layer->id;
  42         }
  43 }
  44
  45 static struct drm_plane_state *
  46 sun4i_backend_layer_duplicate_state(struct drm_plane *plane)
  47 {
  48         struct sun4i_layer_state *orig = state_to_sun4i_layer_state(plane->state);
  49         struct sun4i_layer_state *copy;
  50
  51         copy = kzalloc(sizeof(*copy), GFP_KERNEL);
  52         if (!copy)
  53                 return NULL;
  54
  55         __drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
  56         copy->uses_frontend = orig->uses_frontend;
  57
  58         return &copy->state;
  59 }
  60
  61 static void sun4i_backend_layer_destroy_state(struct drm_plane *plane,
  62                                               struct drm_plane_state *state)
  63 {
  64         struct sun4i_layer_state *s_state = state_to_sun4i_layer_state(state);
  65
  66         __drm_atomic_helper_plane_destroy_state(state);
  67
  68         kfree(s_state);
  69 }
  70
  71 static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
  72                                                struct drm_plane_state *old_state)
  73 {
  74         struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(old_state);
  75         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  76         struct sun4i_backend *backend = layer->backend;
  77
  78         sun4i_backend_layer_enable(backend, layer->id, false);
  79
  80         if (layer_state->uses_frontend) {
  81                 unsigned long flags;
  82
  83                 spin_lock_irqsave(&backend->frontend_lock, flags);
  84                 backend->frontend_teardown = true;
  85                 spin_unlock_irqrestore(&backend->frontend_lock, flags);
  86         }
  87 }
  88
  89 static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
  90                                               struct drm_plane_state *old_state)
  91 {
  92         struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(plane->state);
  93         struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
  94         struct sun4i_backend *backend = layer->backend;
  95         struct sun4i_frontend *frontend = backend->frontend;
  96
  97         if (layer_state->uses_frontend) {
  98                 sun4i_frontend_init(frontend);
  99                 sun4i_frontend_update_coord(frontend, plane);
 100                 sun4i_frontend_update_buffer(frontend, plane);
 101                 sun4i_frontend_update_formats(frontend, plane,
 102                                               DRM_FORMAT_ARGB8888);
 103                 sun4i_backend_update_layer_frontend(backend, layer->id,
 104                                                     DRM_FORMAT_ARGB8888);
 105                 sun4i_frontend_enable(frontend);
 106         } else {
 107                 sun4i_backend_update_layer_formats(backend, layer->id, plane);
 108                 sun4i_backend_update_layer_buffer(backend, layer->id, plane);
 109         }
 110
 111         sun4i_backend_update_layer_coord(backend, layer->id, plane);
 112         sun4i_backend_update_layer_zpos(backend, layer->id, plane);
 113         sun4i_backend_layer_enable(backend, layer->id, true);
 114 }
 115
 116 static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
 117         .atomic_disable = sun4i_backend_layer_atomic_disable,
 118         .atomic_update  = sun4i_backend_layer_atomic_update,
 119 };
 120
 121 static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
 122         .atomic_destroy_state   = sun4i_backend_layer_destroy_state,
 123         .atomic_duplicate_state = sun4i_backend_layer_duplicate_state,
 124         .destroy                = drm_plane_cleanup,
 125         .disable_plane          = drm_atomic_helper_disable_plane,
 126         .reset                  = sun4i_backend_layer_reset,
 127         .update_plane           = drm_atomic_helper_update_plane,
 128 };
 129
 130 static const uint32_t sun4i_backend_layer_formats[] = {
 131         DRM_FORMAT_ARGB8888,
 132         DRM_FORMAT_ARGB4444,
 133         DRM_FORMAT_ARGB1555,
 134         DRM_FORMAT_RGBA5551,
 135         DRM_FORMAT_RGBA4444,
 136         DRM_FORMAT_RGB888,
 137         DRM_FORMAT_RGB565,
 138         DRM_FORMAT_UYVY,
 139         DRM_FORMAT_VYUY,
 140         DRM_FORMAT_XRGB8888,
 141         DRM_FORMAT_YUYV,
 142         DRM_FORMAT_YVYU,
 143 };
 144
 145 static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
 146                                                 struct sun4i_backend *backend,
 147                                                 enum drm_plane_type type)
 148 {
 149         struct sun4i_layer *layer;
 150         int ret;
 151
 152         layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
 153         if (!layer)
 154                 return ERR_PTR(-ENOMEM);
 155
 156         /* possible crtcs are set later */
 157         ret = drm_universal_plane_init(drm, &layer->plane, 0,
 158                                        &sun4i_backend_layer_funcs,
 159                                        sun4i_backend_layer_formats,
 160                                        ARRAY_SIZE(sun4i_backend_layer_formats),
 161                                        NULL, type, NULL);
 162         if (ret) {
 163                 dev_err(drm->dev, "Couldn't initialize layer\n");
 164                 return ERR_PTR(ret);
 165         }
 166
 167         drm_plane_helper_add(&layer->plane,
 168                              &sun4i_backend_layer_helper_funcs);
 169         layer->backend = backend;
 170
 171         drm_plane_create_alpha_property(&layer->plane);
 172         drm_plane_create_zpos_property(&layer->plane, 0, 0,
 173                                        SUN4I_BACKEND_NUM_LAYERS - 1);
 174
 175         return layer;
 176 }
 177
 178 struct drm_plane **sun4i_layers_init(struct drm_device *drm,
 179                                      struct sunxi_engine *engine)
 180 {
 181         struct drm_plane **planes;
 182         struct sun4i_backend *backend = engine_to_sun4i_backend(engine);
 183         int i;
 184
 185         /* We need to have a sentinel at the need, hence the overallocation */
 186         planes = devm_kcalloc(drm->dev, SUN4I_BACKEND_NUM_LAYERS + 1,
 187                               sizeof(*planes), GFP_KERNEL);
 188         if (!planes)
 189                 return ERR_PTR(-ENOMEM);
 190
 191         for (i = 0; i < SUN4I_BACKEND_NUM_LAYERS; i++) {
 192                 enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY;
 193                 struct sun4i_layer *layer;
 194
 195                 layer = sun4i_layer_init_one(drm, backend, type);
 196                 if (IS_ERR(layer)) {
 197                         dev_err(drm->dev, "Couldn't initialize %s plane\n",
 198                                 i ? "overlay" : "primary");
 199                         return ERR_CAST(layer);
 200                 };
 201
 202                 layer->id = i;
 203                 planes[i] = &layer->plane;
 204         };
 205
 206         return planes;
 207 }