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_valid(struct adv7511 * adv,const struct drm_display_mode * mode)103 enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv,
104 const struct drm_display_mode *mode)
105 {
106 int lanes;
107 struct mipi_dsi_device *dsi = adv->dsi;
108
109 if (mode->clock > 80000)
110 lanes = 4;
111 else
112 lanes = 3;
113
114 /*
115 * TODO: add support for dynamic switching of lanes
116 * by using the bridge pre_enable() op . Till then filter
117 * out the modes which shall need different number of lanes
118 * than what was configured in the device tree.
119 */
120 if (lanes != dsi->lanes)
121 return MODE_BAD;
122
123 return MODE_OK;
124 }
125
adv7533_patch_registers(struct adv7511 * adv)126 int adv7533_patch_registers(struct adv7511 *adv)
127 {
128 return regmap_register_patch(adv->regmap,
129 adv7533_fixed_registers,
130 ARRAY_SIZE(adv7533_fixed_registers));
131 }
132
adv7533_patch_cec_registers(struct adv7511 * adv)133 int adv7533_patch_cec_registers(struct adv7511 *adv)
134 {
135 return regmap_register_patch(adv->regmap_cec,
136 adv7533_cec_fixed_registers,
137 ARRAY_SIZE(adv7533_cec_fixed_registers));
138 }
139
adv7533_attach_dsi(struct adv7511 * adv)140 int adv7533_attach_dsi(struct adv7511 *adv)
141 {
142 struct device *dev = &adv->i2c_main->dev;
143 struct mipi_dsi_host *host;
144 struct mipi_dsi_device *dsi;
145 int ret = 0;
146 const struct mipi_dsi_device_info info = { .type = "adv7533",
147 .channel = 0,
148 .node = NULL,
149 };
150
151 host = of_find_mipi_dsi_host_by_node(adv->host_node);
152 if (!host) {
153 dev_err(dev, "failed to find dsi host\n");
154 return -EPROBE_DEFER;
155 }
156
157 dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
158 if (IS_ERR(dsi)) {
159 dev_err(dev, "failed to create dsi device\n");
160 return PTR_ERR(dsi);
161 }
162
163 adv->dsi = dsi;
164
165 dsi->lanes = adv->num_dsi_lanes;
166 dsi->format = MIPI_DSI_FMT_RGB888;
167 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
168 MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
169
170 ret = devm_mipi_dsi_attach(dev, dsi);
171 if (ret < 0) {
172 dev_err(dev, "failed to attach dsi to host\n");
173 return ret;
174 }
175
176 return 0;
177 }
178
adv7533_parse_dt(struct device_node * np,struct adv7511 * adv)179 int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
180 {
181 u32 num_lanes;
182
183 of_property_read_u32(np, "adi,dsi-lanes", &num_lanes);
184
185 if (num_lanes < 1 || num_lanes > 4)
186 return -EINVAL;
187
188 adv->num_dsi_lanes = num_lanes;
189
190 adv->host_node = of_graph_get_remote_node(np, 0, 0);
191 if (!adv->host_node)
192 return -ENODEV;
193
194 of_node_put(adv->host_node);
195
196 adv->use_timing_gen = !of_property_read_bool(np,
197 "adi,disable-timing-generator");
198
199 /* TODO: Check if these need to be parsed by DT or not */
200 adv->rgb = true;
201 adv->embedded_sync = false;
202
203 return 0;
204 }
205