summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/mediatek/mtk_drm_plane.c
blob: f7e6aa1b5b7d1d4e5b994d1acc0f8166a9eb09f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/*
 * Copyright (c) 2015 MediaTek Inc.
 * Author: CK Hu <ck.hu@mediatek.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>

#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_drv.h"
#include "mtk_drm_fb.h"
#include "mtk_drm_gem.h"
#include "mtk_drm_plane.h"

static const u32 formats[] = {
	DRM_FORMAT_XRGB8888,
	DRM_FORMAT_ARGB8888,
	DRM_FORMAT_RGB565,
	DRM_FORMAT_UYVY,
	DRM_FORMAT_YUYV,
};

static void mtk_plane_reset(struct drm_plane *plane)
{
	struct mtk_plane_state *state;

	if (plane->state) {
		__drm_atomic_helper_plane_destroy_state(plane->state);

		state = to_mtk_plane_state(plane->state);
		memset(state, 0, sizeof(*state));
	} else {
		state = kzalloc(sizeof(*state), GFP_KERNEL);
		if (!state)
			return;
		plane->state = &state->base;
	}

	state->base.plane = plane;
	state->pending.format = DRM_FORMAT_RGB565;
}

static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
{
	struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
	struct mtk_plane_state *state;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		return NULL;

	__drm_atomic_helper_plane_duplicate_state(plane, &state->base);

	WARN_ON(state->base.plane != plane);

	state->pending = old_state->pending;

	return &state->base;
}

static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
					struct drm_plane_state *state)
{
	__drm_atomic_helper_plane_destroy_state(state);
	kfree(to_mtk_plane_state(state));
}

static const struct drm_plane_funcs mtk_plane_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.destroy = drm_plane_cleanup,
	.reset = mtk_plane_reset,
	.atomic_duplicate_state = mtk_plane_duplicate_state,
	.atomic_destroy_state = mtk_drm_plane_destroy_state,
};

static int mtk_plane_atomic_check(struct drm_plane *plane,
				  struct drm_plane_state *state)
{
	struct drm_framebuffer *fb = state->fb;
	struct drm_crtc_state *crtc_state;

	if (!fb)
		return 0;

	if (!state->crtc)
		return 0;

	crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
	if (IS_ERR(crtc_state))
		return PTR_ERR(crtc_state);

	return drm_atomic_helper_check_plane_state(state, crtc_state,
						   DRM_PLANE_HELPER_NO_SCALING,
						   DRM_PLANE_HELPER_NO_SCALING,
						   true, true);
}

static void mtk_plane_atomic_update(struct drm_plane *plane,
				    struct drm_plane_state *old_state)
{
	struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
	struct drm_crtc *crtc = plane->state->crtc;
	struct drm_framebuffer *fb = plane->state->fb;
	struct drm_gem_object *gem;
	struct mtk_drm_gem_obj *mtk_gem;
	unsigned int pitch, format;
	dma_addr_t addr;

	if (!crtc || WARN_ON(!fb))
		return;

	gem = fb->obj[0];
	mtk_gem = to_mtk_gem_obj(gem);
	addr = mtk_gem->dma_addr;
	pitch = fb->pitches[0];
	format = fb->format->format;

	addr += (plane->state->src.x1 >> 16) * fb->format->cpp[0];
	addr += (plane->state->src.y1 >> 16) * pitch;

	state->pending.enable = true;
	state->pending.pitch = pitch;
	state->pending.format = format;
	state->pending.addr = addr;
	state->pending.x = plane->state->dst.x1;
	state->pending.y = plane->state->dst.y1;
	state->pending.width = drm_rect_width(&plane->state->dst);
	state->pending.height = drm_rect_height(&plane->state->dst);
	wmb(); /* Make sure the above parameters are set before update */
	state->pending.dirty = true;
}

static void mtk_plane_atomic_disable(struct drm_plane *plane,
				     struct drm_plane_state *old_state)
{
	struct mtk_plane_state *state = to_mtk_plane_state(plane->state);

	state->pending.enable = false;
	wmb(); /* Make sure the above parameter is set before update */
	state->pending.dirty = true;
}

static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
	.atomic_check = mtk_plane_atomic_check,
	.atomic_update = mtk_plane_atomic_update,
	.atomic_disable = mtk_plane_atomic_disable,
};

int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
		   unsigned long possible_crtcs, enum drm_plane_type type)
{
	int err;

	err = drm_universal_plane_init(dev, plane, possible_crtcs,
				       &mtk_plane_funcs, formats,
				       ARRAY_SIZE(formats), NULL, type, NULL);
	if (err) {
		DRM_ERROR("failed to initialize plane\n");
		return err;
	}

	drm_plane_helper_add(plane, &mtk_plane_helper_funcs);

	return 0;
}
OpenPOWER on IntegriCloud