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 struct mipi_dsi_device *dsi = adv->dsi;
107 u8 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
108
109 /* Check max clock for either 7533 or 7535 */
110 if (mode->clock > adv->info->max_mode_clock_khz)
111 return MODE_CLOCK_HIGH;
112
113 /* Check max clock for each lane */
114 if (mode->clock * bpp > adv->info->max_lane_freq_khz * adv->num_dsi_lanes)
115 return MODE_CLOCK_HIGH;
116
117 return MODE_OK;
118 }
119
adv7533_patch_registers(struct adv7511 * adv)120 int adv7533_patch_registers(struct adv7511 *adv)
121 {
122 return regmap_register_patch(adv->regmap,
123 adv7533_fixed_registers,
124 ARRAY_SIZE(adv7533_fixed_registers));
125 }
126
adv7533_patch_cec_registers(struct adv7511 * adv)127 int adv7533_patch_cec_registers(struct adv7511 *adv)
128 {
129 return regmap_register_patch(adv->regmap_cec,
130 adv7533_cec_fixed_registers,
131 ARRAY_SIZE(adv7533_cec_fixed_registers));
132 }
133
adv7533_attach_dsi(struct adv7511 * adv)134 int adv7533_attach_dsi(struct adv7511 *adv)
135 {
136 struct device *dev = &adv->i2c_main->dev;
137 struct mipi_dsi_host *host;
138 struct mipi_dsi_device *dsi;
139 int ret = 0;
140 const struct mipi_dsi_device_info info = { .type = "adv7533",
141 .channel = 0,
142 .node = NULL,
143 };
144
145 host = of_find_mipi_dsi_host_by_node(adv->host_node);
146 if (!host)
147 return dev_err_probe(dev, -EPROBE_DEFER,
148 "failed to find dsi host\n");
149
150 dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
151 if (IS_ERR(dsi))
152 return dev_err_probe(dev, PTR_ERR(dsi),
153 "failed to create dsi device\n");
154
155 adv->dsi = dsi;
156
157 dsi->lanes = adv->num_dsi_lanes;
158 dsi->format = MIPI_DSI_FMT_RGB888;
159 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
160 MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
161
162 ret = devm_mipi_dsi_attach(dev, dsi);
163 if (ret < 0)
164 return dev_err_probe(dev, ret, "failed to attach dsi to host\n");
165
166 return 0;
167 }
168
adv7533_parse_dt(struct device_node * np,struct adv7511 * adv)169 int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
170 {
171 u32 num_lanes;
172
173 of_property_read_u32(np, "adi,dsi-lanes", &num_lanes);
174
175 if (num_lanes < 1 || num_lanes > 4)
176 return -EINVAL;
177
178 adv->num_dsi_lanes = num_lanes;
179
180 adv->host_node = of_graph_get_remote_node(np, 0, 0);
181 if (!adv->host_node)
182 return -ENODEV;
183
184 of_node_put(adv->host_node);
185
186 adv->use_timing_gen = !of_property_read_bool(np,
187 "adi,disable-timing-generator");
188
189 /* TODO: Check if these need to be parsed by DT or not */
190 adv->rgb = true;
191 adv->embedded_sync = false;
192
193 return 0;
194 }
195