tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
23struct sun8i_plane_desc {
24 enum drm_plane_type type;
25 const uint32_t *formats;
26 uint32_t nformats;
27};
28
29static 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
38static 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
50static 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
55static 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
64static const uint32_t sun8i_mixer_layer_formats[] = {
65 DRM_FORMAT_RGB888,
66 DRM_FORMAT_ARGB8888,
67 DRM_FORMAT_XRGB8888,
68};
69
70static 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
78static 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
106struct 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}