drivers/gpu/drm/sun4i/sun8i_layer.c

   1 /*
   2  * Copyright (C) Icenowy Zheng <icenowy@aosc.io>
   3  *
   4  * Based on sun4i_layer.h, which is:
   5  *   Copyright (C) 2015 Free Electrons
   6  *   Copyright (C) 2015 NextThing Co
   7  *
   8  *   Maxime Ripard <maxime.ripard@free-electrons.com>
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  */
  15
  16 #include <drm/drm_atomic_helper.h>
  17 #include <drm/drm_plane_helper.h>
  18 #include <drm/drmP.h>
  19
  20 #include "sun8i_layer.h"
  21 #include "sun8i_mixer.h"
  22
  23 struct sun8i_plane_desc {
  24                enum drm_plane_type     type;
  25                const uint32_t          *formats;
  26                uint32_t                nformats;
  27 };
  28
  29 static void sun8i_mixer_layer_atomic_disable(struct drm_plane *plane,
  30                                                struct drm_plane_state *old_state)
  31 {
  32         struct sun8i_layer *layer = plane_to_sun8i_layer(plane);
  33         struct sun8i_mixer *mixer = layer->mixer;
  34
  35         sun8i_mixer_layer_enable(mixer, layer->id, false);
  36 }
  37
  38 static void sun8i_mixer_layer_atomic_update(struct drm_plane *plane,
  39                                               struct drm_plane_state *old_state)
  40 {
  41         struct sun8i_layer *layer = plane_to_sun8i_layer(plane);
  42         struct sun8i_mixer *mixer = layer->mixer;
  43
  44         sun8i_mixer_update_layer_coord(mixer, layer->id, plane);
  45         sun8i_mixer_update_layer_formats(mixer, layer->id, plane);
  46         sun8i_mixer_update_layer_buffer(mixer, layer->id, plane);
  47         sun8i_mixer_layer_enable(mixer, layer->id, true);
  48 }
  49
  50 static struct drm_plane_helper_funcs sun8i_mixer_layer_helper_funcs = {
  51         .atomic_disable = sun8i_mixer_layer_atomic_disable,
  52         .atomic_update  = sun8i_mixer_layer_atomic_update,
  53 };
  54
  55 static const struct drm_plane_funcs sun8i_mixer_layer_funcs = {
  56         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
  57         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
  58         .destroy                = drm_plane_cleanup,
  59         .disable_plane          = drm_atomic_helper_disable_plane,
  60         .reset                  = drm_atomic_helper_plane_reset,
  61         .update_plane           = drm_atomic_helper_update_plane,
  62 };
  63
  64 static const uint32_t sun8i_mixer_layer_formats[] = {
  65         DRM_FORMAT_RGB888,
  66         DRM_FORMAT_ARGB8888,
  67         DRM_FORMAT_XRGB8888,
  68 };
  69
  70 static const struct sun8i_plane_desc sun8i_mixer_planes[] = {
  71         {
  72                 .type = DRM_PLANE_TYPE_PRIMARY,
  73                 .formats = sun8i_mixer_layer_formats,
  74                 .nformats = ARRAY_SIZE(sun8i_mixer_layer_formats),
  75         },
  76 };
  77
  78 static struct sun8i_layer *sun8i_layer_init_one(struct drm_device *drm,
  79                                                 struct sun8i_mixer *mixer,
  80                                                 const struct sun8i_plane_desc *plane)
  81 {
  82         struct sun8i_layer *layer;
  83         int ret;
  84
  85         layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
  86         if (!layer)
  87                 return ERR_PTR(-ENOMEM);
  88
  89         /* possible crtcs are set later */
  90         ret = drm_universal_plane_init(drm, &layer->plane, 0,
  91                                        &sun8i_mixer_layer_funcs,
  92                                        plane->formats, plane->nformats,
  93                                        NULL, plane->type, NULL);
  94         if (ret) {
  95                 dev_err(drm->dev, "Couldn't initialize layer\n");
  96                 return ERR_PTR(ret);
  97         }
  98
  99         drm_plane_helper_add(&layer->plane,
 100                              &sun8i_mixer_layer_helper_funcs);
 101         layer->mixer = mixer;
 102
 103         return layer;
 104 }
 105
 106 struct drm_plane **sun8i_layers_init(struct drm_device *drm,
 107                                      struct sunxi_engine *engine)
 108 {
 109         struct drm_plane **planes;
 110         struct sun8i_mixer *mixer = engine_to_sun8i_mixer(engine);
 111         int i;
 112
 113         planes = devm_kcalloc(drm->dev, ARRAY_SIZE(sun8i_mixer_planes) + 1,
 114                               sizeof(*planes), GFP_KERNEL);
 115         if (!planes)
 116                 return ERR_PTR(-ENOMEM);
 117
 118         for (i = 0; i < ARRAY_SIZE(sun8i_mixer_planes); i++) {
 119                 const struct sun8i_plane_desc *plane = &sun8i_mixer_planes[i];
 120                 struct sun8i_layer *layer;
 121
 122                 layer = sun8i_layer_init_one(drm, mixer, plane);
 123                 if (IS_ERR(layer)) {
 124                         dev_err(drm->dev, "Couldn't initialize %s plane\n",
 125                                 i ? "overlay" : "primary");
 126                         return ERR_CAST(layer);
 127                 };
 128
 129                 layer->id = i;
 130                 planes[i] = &layer->plane;
 131         };
 132
 133         return planes;
 134 }