summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/shmobile/shmob_drm_kms.c
blob: 60a2c8d8a0d947d2f6626196f9581fc3fff0a72b (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
// SPDX-License-Identifier: GPL-2.0+
/*
 * shmob_drm_kms.c  --  SH Mobile DRM Mode Setting
 *
 * Copyright (C) 2012 Renesas Electronics Corporation
 *
 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 */

#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_probe_helper.h>

#include "shmob_drm_crtc.h"
#include "shmob_drm_drv.h"
#include "shmob_drm_kms.h"
#include "shmob_drm_regs.h"

/* -----------------------------------------------------------------------------
 * Format helpers
 */

static const struct shmob_drm_format_info shmob_drm_format_infos[] = {
	{
		.fourcc = DRM_FORMAT_RGB565,
		.bpp = 16,
		.yuv = false,
		.lddfr = LDDFR_PKF_RGB16,
	}, {
		.fourcc = DRM_FORMAT_RGB888,
		.bpp = 24,
		.yuv = false,
		.lddfr = LDDFR_PKF_RGB24,
	}, {
		.fourcc = DRM_FORMAT_ARGB8888,
		.bpp = 32,
		.yuv = false,
		.lddfr = LDDFR_PKF_ARGB32,
	}, {
		.fourcc = DRM_FORMAT_NV12,
		.bpp = 12,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_420,
	}, {
		.fourcc = DRM_FORMAT_NV21,
		.bpp = 12,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_420,
	}, {
		.fourcc = DRM_FORMAT_NV16,
		.bpp = 16,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_422,
	}, {
		.fourcc = DRM_FORMAT_NV61,
		.bpp = 16,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_422,
	}, {
		.fourcc = DRM_FORMAT_NV24,
		.bpp = 24,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_444,
	}, {
		.fourcc = DRM_FORMAT_NV42,
		.bpp = 24,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_444,
	},
};

const struct shmob_drm_format_info *shmob_drm_format_info(u32 fourcc)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(shmob_drm_format_infos); ++i) {
		if (shmob_drm_format_infos[i].fourcc == fourcc)
			return &shmob_drm_format_infos[i];
	}

	return NULL;
}

/* -----------------------------------------------------------------------------
 * Frame buffer
 */

static struct drm_framebuffer *
shmob_drm_fb_create(struct drm_device *dev, struct drm_file *file_priv,
		    const struct drm_mode_fb_cmd2 *mode_cmd)
{
	const struct shmob_drm_format_info *format;

	format = shmob_drm_format_info(mode_cmd->pixel_format);
	if (format == NULL) {
		dev_dbg(dev->dev, "unsupported pixel format %08x\n",
			mode_cmd->pixel_format);
		return ERR_PTR(-EINVAL);
	}

	if (mode_cmd->pitches[0] & 7 || mode_cmd->pitches[0] >= 65536) {
		dev_dbg(dev->dev, "invalid pitch value %u\n",
			mode_cmd->pitches[0]);
		return ERR_PTR(-EINVAL);
	}

	if (format->yuv) {
		unsigned int chroma_cpp = format->bpp == 24 ? 2 : 1;

		if (mode_cmd->pitches[1] != mode_cmd->pitches[0] * chroma_cpp) {
			dev_dbg(dev->dev,
				"luma and chroma pitches do not match\n");
			return ERR_PTR(-EINVAL);
		}
	}

	return drm_gem_fb_create(dev, file_priv, mode_cmd);
}

static const struct drm_mode_config_funcs shmob_drm_mode_config_funcs = {
	.fb_create = shmob_drm_fb_create,
};

int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
{
	int ret;

	ret = drmm_mode_config_init(sdev->ddev);
	if (ret)
		return ret;

	shmob_drm_crtc_create(sdev);
	shmob_drm_encoder_create(sdev);
	shmob_drm_connector_create(sdev, &sdev->encoder.encoder);

	drm_kms_helper_poll_init(sdev->ddev);

	sdev->ddev->mode_config.min_width = 0;
	sdev->ddev->mode_config.min_height = 0;
	sdev->ddev->mode_config.max_width = 4095;
	sdev->ddev->mode_config.max_height = 4095;
	sdev->ddev->mode_config.funcs = &shmob_drm_mode_config_funcs;

	drm_helper_disable_unused_functions(sdev->ddev);

	return 0;
}