summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/bridge/adv7511/adv7533.c
blob: eb7579dec40ae16fbfe2e32539697dd852dea696 (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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2016, The Linux Foundation. All rights reserved.
 */

#include <linux/of_graph.h>

#include "adv7511.h"

static const struct reg_sequence adv7533_fixed_registers[] = {
	{ 0x16, 0x20 },
	{ 0x9a, 0xe0 },
	{ 0xba, 0x70 },
	{ 0xde, 0x82 },
	{ 0xe4, 0x40 },
	{ 0xe5, 0x80 },
};

static const struct reg_sequence adv7533_cec_fixed_registers[] = {
	{ 0x15, 0xd0 },
	{ 0x17, 0xd0 },
	{ 0x24, 0x20 },
	{ 0x57, 0x11 },
	{ 0x05, 0xc8 },
};

static void adv7511_dsi_config_timing_gen(struct adv7511 *adv)
{
	struct mipi_dsi_device *dsi = adv->dsi;
	struct drm_display_mode *mode = &adv->curr_mode;
	unsigned int hsw, hfp, hbp, vsw, vfp, vbp;
	u8 clock_div_by_lanes[] = { 6, 4, 3 };	/* 2, 3, 4 lanes */

	hsw = mode->hsync_end - mode->hsync_start;
	hfp = mode->hsync_start - mode->hdisplay;
	hbp = mode->htotal - mode->hsync_end;
	vsw = mode->vsync_end - mode->vsync_start;
	vfp = mode->vsync_start - mode->vdisplay;
	vbp = mode->vtotal - mode->vsync_end;

	/* set pixel clock divider mode */
	regmap_write(adv->regmap_cec, 0x16,
		     clock_div_by_lanes[dsi->lanes - 2] << 3);

	/* horizontal porch params */
	regmap_write(adv->regmap_cec, 0x28, mode->htotal >> 4);
	regmap_write(adv->regmap_cec, 0x29, (mode->htotal << 4) & 0xff);
	regmap_write(adv->regmap_cec, 0x2a, hsw >> 4);
	regmap_write(adv->regmap_cec, 0x2b, (hsw << 4) & 0xff);
	regmap_write(adv->regmap_cec, 0x2c, hfp >> 4);
	regmap_write(adv->regmap_cec, 0x2d, (hfp << 4) & 0xff);
	regmap_write(adv->regmap_cec, 0x2e, hbp >> 4);
	regmap_write(adv->regmap_cec, 0x2f, (hbp << 4) & 0xff);

	/* vertical porch params */
	regmap_write(adv->regmap_cec, 0x30, mode->vtotal >> 4);
	regmap_write(adv->regmap_cec, 0x31, (mode->vtotal << 4) & 0xff);
	regmap_write(adv->regmap_cec, 0x32, vsw >> 4);
	regmap_write(adv->regmap_cec, 0x33, (vsw << 4) & 0xff);
	regmap_write(adv->regmap_cec, 0x34, vfp >> 4);
	regmap_write(adv->regmap_cec, 0x35, (vfp << 4) & 0xff);
	regmap_write(adv->regmap_cec, 0x36, vbp >> 4);
	regmap_write(adv->regmap_cec, 0x37, (vbp << 4) & 0xff);
}

void adv7533_dsi_power_on(struct adv7511 *adv)
{
	struct mipi_dsi_device *dsi = adv->dsi;

	if (adv->use_timing_gen)
		adv7511_dsi_config_timing_gen(adv);

	/* set number of dsi lanes */
	regmap_write(adv->regmap_cec, 0x1c, dsi->lanes << 4);

	if (adv->use_timing_gen) {
		/* reset internal timing generator */
		regmap_write(adv->regmap_cec, 0x27, 0xcb);
		regmap_write(adv->regmap_cec, 0x27, 0x8b);
		regmap_write(adv->regmap_cec, 0x27, 0xcb);
	} else {
		/* disable internal timing generator */
		regmap_write(adv->regmap_cec, 0x27, 0x0b);
	}

	/* enable hdmi */
	regmap_write(adv->regmap_cec, 0x03, 0x89);
	/* disable test mode */
	regmap_write(adv->regmap_cec, 0x55, 0x00);

	regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers,
			      ARRAY_SIZE(adv7533_cec_fixed_registers));
}

void adv7533_dsi_power_off(struct adv7511 *adv)
{
	/* disable hdmi */
	regmap_write(adv->regmap_cec, 0x03, 0x0b);
	/* disable internal timing generator */
	regmap_write(adv->regmap_cec, 0x27, 0x0b);
}

void adv7533_mode_set(struct adv7511 *adv, const struct drm_display_mode *mode)
{
	struct mipi_dsi_device *dsi = adv->dsi;
	int lanes, ret;

	if (adv->num_dsi_lanes != 4)
		return;

	if (mode->clock > 80000)
		lanes = 4;
	else
		lanes = 3;

	if (lanes != dsi->lanes) {
		mipi_dsi_detach(dsi);
		dsi->lanes = lanes;
		ret = mipi_dsi_attach(dsi);
		if (ret)
			dev_err(&dsi->dev, "failed to change host lanes\n");
	}
}

int adv7533_patch_registers(struct adv7511 *adv)
{
	return regmap_register_patch(adv->regmap,
				     adv7533_fixed_registers,
				     ARRAY_SIZE(adv7533_fixed_registers));
}

int adv7533_patch_cec_registers(struct adv7511 *adv)
{
	return regmap_register_patch(adv->regmap_cec,
				    adv7533_cec_fixed_registers,
				    ARRAY_SIZE(adv7533_cec_fixed_registers));
}

int adv7533_attach_dsi(struct adv7511 *adv)
{
	struct device *dev = &adv->i2c_main->dev;
	struct mipi_dsi_host *host;
	struct mipi_dsi_device *dsi;
	int ret = 0;
	const struct mipi_dsi_device_info info = { .type = "adv7533",
						   .channel = 0,
						   .node = NULL,
						 };

	host = of_find_mipi_dsi_host_by_node(adv->host_node);
	if (!host) {
		dev_err(dev, "failed to find dsi host\n");
		return -EPROBE_DEFER;
	}

	dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
	if (IS_ERR(dsi)) {
		dev_err(dev, "failed to create dsi device\n");
		return PTR_ERR(dsi);
	}

	adv->dsi = dsi;

	dsi->lanes = adv->num_dsi_lanes;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
			  MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;

	ret = devm_mipi_dsi_attach(dev, dsi);
	if (ret < 0) {
		dev_err(dev, "failed to attach dsi to host\n");
		return ret;
	}

	return 0;
}

int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
{
	u32 num_lanes;

	of_property_read_u32(np, "adi,dsi-lanes", &num_lanes);

	if (num_lanes < 1 || num_lanes > 4)
		return -EINVAL;

	adv->num_dsi_lanes = num_lanes;

	adv->host_node = of_graph_get_remote_node(np, 0, 0);
	if (!adv->host_node)
		return -ENODEV;

	of_node_put(adv->host_node);

	adv->use_timing_gen = !of_property_read_bool(np,
						"adi,disable-timing-generator");

	/* TODO: Check if these need to be parsed by DT or not */
	adv->rgb = true;
	adv->embedded_sync = false;

	return 0;
}