1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2016, The Linux Foundation. All rights reserved.
4 */
5
6 #include <linux/of_graph.h>
7
8 #include "adv7511.h"
9
10 static const struct reg_sequence adv7533_fixed_registers[] = {
11 { 0x16, 0x20 },
12 { 0x9a, 0xe0 },
13 { 0xba, 0x70 },
14 { 0xde, 0x82 },
15 { 0xe4, 0x40 },
16 { 0xe5, 0x80 },
17 };
18
19 static const struct reg_sequence adv7533_cec_fixed_registers[] = {
20 { 0x15, 0xd0 },
21 { 0x17, 0xd0 },
22 { 0x24, 0x20 },
23 { 0x57, 0x11 },
24 { 0x05, 0xc8 },
25 };
26
adv7511_dsi_config_timing_gen(struct adv7511 * adv)27 static void adv7511_dsi_config_timing_gen(struct adv7511 *adv)
28 {
29 struct mipi_dsi_device *dsi = adv->dsi;
30 struct drm_display_mode *mode = &adv->curr_mode;
31 unsigned int hsw, hfp, hbp, vsw, vfp, vbp;
32 static const u8 clock_div_by_lanes[] = { 6, 4, 3 }; /* 2, 3, 4 lanes */
33
34 hsw = mode->hsync_end - mode->hsync_start;
35 hfp = mode->hsync_start - mode->hdisplay;
36 hbp = mode->htotal - mode->hsync_end;
37 vsw = mode->vsync_end - mode->vsync_start;
38 vfp = mode->vsync_start - mode->vdisplay;
39 vbp = mode->vtotal - mode->vsync_end;
40
41 /* set pixel clock divider mode */
42 regmap_write(adv->regmap_cec, 0x16,
43 clock_div_by_lanes[dsi->lanes - 2] << 3);
44
45 /* horizontal porch params */
46 regmap_write(adv->regmap_cec, 0x28, mode->htotal >> 4);
47 regmap_write(adv->regmap_cec, 0x29, (mode->htotal << 4) & 0xff);
48 regmap_write(adv->regmap_cec, 0x2a, hsw >> 4);
49 regmap_write(adv->regmap_cec, 0x2b, (hsw << 4) & 0xff);
50 regmap_write(adv->regmap_cec, 0x2c, hfp >> 4);
51 regmap_write(adv->regmap_cec, 0x2d, (hfp << 4) & 0xff);
52 regmap_write(adv->regmap_cec, 0x2e, hbp >> 4);
53 regmap_write(adv->regmap_cec, 0x2f, (hbp << 4) & 0xff);
54
55 /* vertical porch params */
56 regmap_write(adv->regmap_cec, 0x30, mode->vtotal >> 4);
57 regmap_write(adv->regmap_cec, 0x31, (mode->vtotal << 4) & 0xff);
58 regmap_write(adv->regmap_cec, 0x32, vsw >> 4);
59 regmap_write(adv->regmap_cec, 0x33, (vsw << 4) & 0xff);
60 regmap_write(adv->regmap_cec, 0x34, vfp >> 4);
61 regmap_write(adv->regmap_cec, 0x35, (vfp << 4) & 0xff);
62 regmap_write(adv->regmap_cec, 0x36, vbp >> 4);
63 regmap_write(adv->regmap_cec, 0x37, (vbp << 4) & 0xff);
64 }
65
adv7533_dsi_power_on(struct adv7511 * adv)66 void adv7533_dsi_power_on(struct adv7511 *adv)
67 {
68 struct mipi_dsi_device *dsi = adv->dsi;
69
70 if (adv->use_timing_gen)
71 adv7511_dsi_config_timing_gen(adv);
72
73 /* set number of dsi lanes */
74 regmap_write(adv->regmap_cec, 0x1c, dsi->lanes << 4);
75
76 if (adv->use_timing_gen) {
77 /* reset internal timing generator */
78 regmap_write(adv->regmap_cec, 0x27, 0xcb);
79 regmap_write(adv->regmap_cec, 0x27, 0x8b);
80 regmap_write(adv->regmap_cec, 0x27, 0xcb);
81 } else {
82 /* disable internal timing generator */
83 regmap_write(adv->regmap_cec, 0x27, 0x0b);
84 }
85
86 /* enable hdmi */
87 regmap_write(adv->regmap_cec, 0x03, 0x89);
88 /* disable test mode */
89 regmap_write(adv->regmap_cec, 0x55, 0x00);
90
91 regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers,
92 ARRAY_SIZE(adv7533_cec_fixed_registers));
93 }
94
adv7533_dsi_power_off(struct adv7511 * adv)95 void adv7533_dsi_power_off(struct adv7511 *adv)
96 {
97 /* disable hdmi */
98 regmap_write(adv->regmap_cec, 0x03, 0x0b);
99 /* disable internal timing generator */
100 regmap_write(adv->regmap_cec, 0x27, 0x0b);
101 }
102
adv7533_mode_set(struct adv7511 * adv,const struct drm_display_mode * mode)103 void adv7533_mode_set(struct adv7511 *adv, const struct drm_display_mode *mode)
104 {
105 struct mipi_dsi_device *dsi = adv->dsi;
106 int lanes, ret;
107
108 if (adv->num_dsi_lanes != 4)
109 return;
110
111 if (mode->clock > 80000)
112 lanes = 4;
113 else
114 lanes = 3;
115
116 if (lanes != dsi->lanes) {
117 mipi_dsi_detach(dsi);
118 dsi->lanes = lanes;
119 ret = mipi_dsi_attach(dsi);
120 if (ret)
121 dev_err(&dsi->dev, "failed to change host lanes\n");
122 }
123 }
124
adv7533_patch_registers(struct adv7511 * adv)125 int adv7533_patch_registers(struct adv7511 *adv)
126 {
127 return regmap_register_patch(adv->regmap,
128 adv7533_fixed_registers,
129 ARRAY_SIZE(adv7533_fixed_registers));
130 }
131
adv7533_patch_cec_registers(struct adv7511 * adv)132 int adv7533_patch_cec_registers(struct adv7511 *adv)
133 {
134 return regmap_register_patch(adv->regmap_cec,
135 adv7533_cec_fixed_registers,
136 ARRAY_SIZE(adv7533_cec_fixed_registers));
137 }
138
adv7533_attach_dsi(struct adv7511 * adv)139 int adv7533_attach_dsi(struct adv7511 *adv)
140 {
141 struct device *dev = &adv->i2c_main->dev;
142 struct mipi_dsi_host *host;
143 struct mipi_dsi_device *dsi;
144 int ret = 0;
145 const struct mipi_dsi_device_info info = { .type = "adv7533",
146 .channel = 0,
147 .node = NULL,
148 };
149
150 host = of_find_mipi_dsi_host_by_node(adv->host_node);
151 if (!host) {
152 dev_err(dev, "failed to find dsi host\n");
153 return -EPROBE_DEFER;
154 }
155
156 dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
157 if (IS_ERR(dsi)) {
158 dev_err(dev, "failed to create dsi device\n");
159 return PTR_ERR(dsi);
160 }
161
162 adv->dsi = dsi;
163
164 dsi->lanes = adv->num_dsi_lanes;
165 dsi->format = MIPI_DSI_FMT_RGB888;
166 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
167 MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
168
169 ret = devm_mipi_dsi_attach(dev, dsi);
170 if (ret < 0) {
171 dev_err(dev, "failed to attach dsi to host\n");
172 return ret;
173 }
174
175 return 0;
176 }
177
adv7533_parse_dt(struct device_node * np,struct adv7511 * adv)178 int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
179 {
180 u32 num_lanes;
181
182 of_property_read_u32(np, "adi,dsi-lanes", &num_lanes);
183
184 if (num_lanes < 1 || num_lanes > 4)
185 return -EINVAL;
186
187 adv->num_dsi_lanes = num_lanes;
188
189 adv->host_node = of_graph_get_remote_node(np, 0, 0);
190 if (!adv->host_node)
191 return -ENODEV;
192
193 of_node_put(adv->host_node);
194
195 adv->use_timing_gen = !of_property_read_bool(np,
196 "adi,disable-timing-generator");
197
198 /* TODO: Check if these need to be parsed by DT or not */
199 adv->rgb = true;
200 adv->embedded_sync = false;
201
202 return 0;
203 }
204