summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/tilcdc/tilcdc_plane.c
blob: ba0d66c0d8ac8965056026354b5a591e3f6dd210 (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
/*
 * Copyright (C) 2015 Texas Instruments
 * Author: Jyri Sarha <jsarha@ti.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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <drm/drmP.h>

#include <drm/drm_atomic.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_atomic_helper.h>
#include <uapi/drm/drm_fourcc.h>

#include "tilcdc_drv.h"

static struct drm_plane_funcs tilcdc_plane_funcs = {
	.update_plane	= drm_atomic_helper_update_plane,
	.disable_plane	= drm_atomic_helper_disable_plane,
	.destroy	= drm_plane_cleanup,
	.set_property	= drm_atomic_helper_plane_set_property,
	.reset		= drm_atomic_helper_plane_reset,
	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};

static int tilcdc_plane_atomic_check(struct drm_plane *plane,
				     struct drm_plane_state *state)
{
	struct drm_crtc_state *crtc_state;
	struct drm_plane_state *old_state = plane->state;
	unsigned int pitch;

	if (!state->crtc)
		return 0;

	if (WARN_ON(!state->fb))
		return -EINVAL;

	if (state->crtc_x || state->crtc_y) {
		dev_err(plane->dev->dev, "%s: crtc position must be zero.",
			__func__);
		return -EINVAL;
	}

	crtc_state = drm_atomic_get_existing_crtc_state(state->state,
							state->crtc);
	/* we should have a crtc state if the plane is attached to a crtc */
	if (WARN_ON(!crtc_state))
		return 0;

	if (crtc_state->mode.hdisplay != state->crtc_w ||
	    crtc_state->mode.vdisplay != state->crtc_h) {
		dev_err(plane->dev->dev,
			"%s: Size must match mode (%dx%d == %dx%d)", __func__,
			crtc_state->mode.hdisplay, crtc_state->mode.vdisplay,
			state->crtc_w, state->crtc_h);
		return -EINVAL;
	}

	pitch = crtc_state->mode.hdisplay *
		state->fb->format->cpp[0];
	if (state->fb->pitches[0] != pitch) {
		dev_err(plane->dev->dev,
			"Invalid pitch: fb and crtc widths must be the same");
		return -EINVAL;
	}

	if (state->fb && old_state->fb &&
	    state->fb->format != old_state->fb->format) {
		dev_dbg(plane->dev->dev,
			"%s(): pixel format change requires mode_change\n",
			__func__);
		crtc_state->mode_changed = true;
	}

	return 0;
}

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

	if (!state->crtc)
		return;

	if (WARN_ON(!state->fb || !state->crtc->state))
		return;

	tilcdc_crtc_update_fb(state->crtc,
			      state->fb,
			      state->crtc->state->event);
}

static const struct drm_plane_helper_funcs plane_helper_funcs = {
	.atomic_check = tilcdc_plane_atomic_check,
	.atomic_update = tilcdc_plane_atomic_update,
};

int tilcdc_plane_init(struct drm_device *dev,
		      struct drm_plane *plane)
{
	struct tilcdc_drm_private *priv = dev->dev_private;
	int ret;

	ret = drm_plane_init(dev, plane, 1,
			     &tilcdc_plane_funcs,
			     priv->pixelformats,
			     priv->num_pixelformats,
			     true);
	if (ret) {
		dev_err(dev->dev, "Failed to initialize plane: %d\n", ret);
		return ret;
	}

	drm_plane_helper_add(plane, &plane_helper_funcs);

	return 0;
}
OpenPOWER on IntegriCloud