tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2020 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 */
6
7#include <linux/delay.h>
8#include <linux/gpio/consumer.h>
9#include <linux/module.h>
10#include <linux/of.h>
11#include <linux/regulator/consumer.h>
12
13#include <video/mipi_display.h>
14
15#include <drm/drm_crtc.h>
16#include <drm/drm_device.h>
17#include <drm/drm_mipi_dsi.h>
18#include <drm/drm_modes.h>
19#include <drm/drm_panel.h>
20
21struct tdo_tl070wsh30_panel {
22 struct drm_panel base;
23 struct mipi_dsi_device *link;
24
25 struct regulator *supply;
26 struct gpio_desc *reset_gpio;
27};
28
29static inline
30struct tdo_tl070wsh30_panel *to_tdo_tl070wsh30_panel(struct drm_panel *panel)
31{
32 return container_of(panel, struct tdo_tl070wsh30_panel, base);
33}
34
35static int tdo_tl070wsh30_panel_prepare(struct drm_panel *panel)
36{
37 struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
38 int err;
39
40 err = regulator_enable(tdo_tl070wsh30->supply);
41 if (err < 0)
42 return err;
43
44 usleep_range(10000, 11000);
45
46 gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 1);
47
48 usleep_range(10000, 11000);
49
50 gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 0);
51
52 msleep(200);
53
54 err = mipi_dsi_dcs_exit_sleep_mode(tdo_tl070wsh30->link);
55 if (err < 0) {
56 dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
57 regulator_disable(tdo_tl070wsh30->supply);
58 return err;
59 }
60
61 msleep(200);
62
63 err = mipi_dsi_dcs_set_display_on(tdo_tl070wsh30->link);
64 if (err < 0) {
65 dev_err(panel->dev, "failed to set display on: %d\n", err);
66 regulator_disable(tdo_tl070wsh30->supply);
67 return err;
68 }
69
70 msleep(20);
71
72 return 0;
73}
74
75static int tdo_tl070wsh30_panel_unprepare(struct drm_panel *panel)
76{
77 struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
78 int err;
79
80 err = mipi_dsi_dcs_set_display_off(tdo_tl070wsh30->link);
81 if (err < 0)
82 dev_err(panel->dev, "failed to set display off: %d\n", err);
83
84 usleep_range(10000, 11000);
85
86 err = mipi_dsi_dcs_enter_sleep_mode(tdo_tl070wsh30->link);
87 if (err < 0) {
88 dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
89 return err;
90 }
91
92 usleep_range(10000, 11000);
93
94 regulator_disable(tdo_tl070wsh30->supply);
95
96 return 0;
97}
98
99static const struct drm_display_mode default_mode = {
100 .clock = 47250,
101 .hdisplay = 1024,
102 .hsync_start = 1024 + 46,
103 .hsync_end = 1024 + 46 + 80,
104 .htotal = 1024 + 46 + 80 + 100,
105 .vdisplay = 600,
106 .vsync_start = 600 + 5,
107 .vsync_end = 600 + 5 + 5,
108 .vtotal = 600 + 5 + 5 + 20,
109 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
110};
111
112static int tdo_tl070wsh30_panel_get_modes(struct drm_panel *panel,
113 struct drm_connector *connector)
114{
115 struct drm_display_mode *mode;
116
117 mode = drm_mode_duplicate(connector->dev, &default_mode);
118 if (!mode) {
119 dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
120 default_mode.hdisplay, default_mode.vdisplay,
121 drm_mode_vrefresh(&default_mode));
122 return -ENOMEM;
123 }
124
125 drm_mode_set_name(mode);
126
127 drm_mode_probed_add(connector, mode);
128
129 connector->display_info.width_mm = 154;
130 connector->display_info.height_mm = 85;
131 connector->display_info.bpc = 8;
132
133 return 1;
134}
135
136static const struct drm_panel_funcs tdo_tl070wsh30_panel_funcs = {
137 .unprepare = tdo_tl070wsh30_panel_unprepare,
138 .prepare = tdo_tl070wsh30_panel_prepare,
139 .get_modes = tdo_tl070wsh30_panel_get_modes,
140};
141
142static const struct of_device_id tdo_tl070wsh30_of_match[] = {
143 { .compatible = "tdo,tl070wsh30", },
144 { /* sentinel */ }
145};
146MODULE_DEVICE_TABLE(of, tdo_tl070wsh30_of_match);
147
148static int tdo_tl070wsh30_panel_add(struct tdo_tl070wsh30_panel *tdo_tl070wsh30)
149{
150 struct device *dev = &tdo_tl070wsh30->link->dev;
151 int err;
152
153 tdo_tl070wsh30->supply = devm_regulator_get(dev, "power");
154 if (IS_ERR(tdo_tl070wsh30->supply))
155 return PTR_ERR(tdo_tl070wsh30->supply);
156
157 tdo_tl070wsh30->reset_gpio = devm_gpiod_get(dev, "reset",
158 GPIOD_OUT_LOW);
159 if (IS_ERR(tdo_tl070wsh30->reset_gpio)) {
160 err = PTR_ERR(tdo_tl070wsh30->reset_gpio);
161 dev_dbg(dev, "failed to get reset gpio: %d\n", err);
162 return err;
163 }
164
165 drm_panel_init(&tdo_tl070wsh30->base, &tdo_tl070wsh30->link->dev,
166 &tdo_tl070wsh30_panel_funcs, DRM_MODE_CONNECTOR_DSI);
167
168 err = drm_panel_of_backlight(&tdo_tl070wsh30->base);
169 if (err)
170 return err;
171
172 drm_panel_add(&tdo_tl070wsh30->base);
173
174 return 0;
175}
176
177static int tdo_tl070wsh30_panel_probe(struct mipi_dsi_device *dsi)
178{
179 struct tdo_tl070wsh30_panel *tdo_tl070wsh30;
180 int err;
181
182 dsi->lanes = 4;
183 dsi->format = MIPI_DSI_FMT_RGB888;
184 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
185
186 tdo_tl070wsh30 = devm_kzalloc(&dsi->dev, sizeof(*tdo_tl070wsh30),
187 GFP_KERNEL);
188 if (!tdo_tl070wsh30)
189 return -ENOMEM;
190
191 mipi_dsi_set_drvdata(dsi, tdo_tl070wsh30);
192 tdo_tl070wsh30->link = dsi;
193
194 err = tdo_tl070wsh30_panel_add(tdo_tl070wsh30);
195 if (err < 0)
196 return err;
197
198 return mipi_dsi_attach(dsi);
199}
200
201static void tdo_tl070wsh30_panel_remove(struct mipi_dsi_device *dsi)
202{
203 struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
204 int err;
205
206 err = mipi_dsi_detach(dsi);
207 if (err < 0)
208 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
209
210 drm_panel_remove(&tdo_tl070wsh30->base);
211}
212
213static struct mipi_dsi_driver tdo_tl070wsh30_panel_driver = {
214 .driver = {
215 .name = "panel-tdo-tl070wsh30",
216 .of_match_table = tdo_tl070wsh30_of_match,
217 },
218 .probe = tdo_tl070wsh30_panel_probe,
219 .remove = tdo_tl070wsh30_panel_remove,
220};
221module_mipi_dsi_driver(tdo_tl070wsh30_panel_driver);
222
223MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
224MODULE_DESCRIPTION("TDO TL070WSH30 panel driver");
225MODULE_LICENSE("GPL v2");