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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 bool prepared;
29};
30
31static inline
32struct tdo_tl070wsh30_panel *to_tdo_tl070wsh30_panel(struct drm_panel *panel)
33{
34 return container_of(panel, struct tdo_tl070wsh30_panel, base);
35}
36
37static int tdo_tl070wsh30_panel_prepare(struct drm_panel *panel)
38{
39 struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
40 int err;
41
42 if (tdo_tl070wsh30->prepared)
43 return 0;
44
45 err = regulator_enable(tdo_tl070wsh30->supply);
46 if (err < 0)
47 return err;
48
49 usleep_range(10000, 11000);
50
51 gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 1);
52
53 usleep_range(10000, 11000);
54
55 gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 0);
56
57 msleep(200);
58
59 err = mipi_dsi_dcs_exit_sleep_mode(tdo_tl070wsh30->link);
60 if (err < 0) {
61 dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
62 regulator_disable(tdo_tl070wsh30->supply);
63 return err;
64 }
65
66 msleep(200);
67
68 err = mipi_dsi_dcs_set_display_on(tdo_tl070wsh30->link);
69 if (err < 0) {
70 dev_err(panel->dev, "failed to set display on: %d\n", err);
71 regulator_disable(tdo_tl070wsh30->supply);
72 return err;
73 }
74
75 msleep(20);
76
77 tdo_tl070wsh30->prepared = true;
78
79 return 0;
80}
81
82static int tdo_tl070wsh30_panel_unprepare(struct drm_panel *panel)
83{
84 struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
85 int err;
86
87 if (!tdo_tl070wsh30->prepared)
88 return 0;
89
90 err = mipi_dsi_dcs_set_display_off(tdo_tl070wsh30->link);
91 if (err < 0)
92 dev_err(panel->dev, "failed to set display off: %d\n", err);
93
94 usleep_range(10000, 11000);
95
96 err = mipi_dsi_dcs_enter_sleep_mode(tdo_tl070wsh30->link);
97 if (err < 0) {
98 dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
99 return err;
100 }
101
102 usleep_range(10000, 11000);
103
104 regulator_disable(tdo_tl070wsh30->supply);
105
106 tdo_tl070wsh30->prepared = false;
107
108 return 0;
109}
110
111static const struct drm_display_mode default_mode = {
112 .clock = 47250,
113 .hdisplay = 1024,
114 .hsync_start = 1024 + 46,
115 .hsync_end = 1024 + 46 + 80,
116 .htotal = 1024 + 46 + 80 + 100,
117 .vdisplay = 600,
118 .vsync_start = 600 + 5,
119 .vsync_end = 600 + 5 + 5,
120 .vtotal = 600 + 5 + 5 + 20,
121 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
122};
123
124static int tdo_tl070wsh30_panel_get_modes(struct drm_panel *panel,
125 struct drm_connector *connector)
126{
127 struct drm_display_mode *mode;
128
129 mode = drm_mode_duplicate(connector->dev, &default_mode);
130 if (!mode) {
131 dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
132 default_mode.hdisplay, default_mode.vdisplay,
133 drm_mode_vrefresh(&default_mode));
134 return -ENOMEM;
135 }
136
137 drm_mode_set_name(mode);
138
139 drm_mode_probed_add(connector, mode);
140
141 connector->display_info.width_mm = 154;
142 connector->display_info.height_mm = 85;
143 connector->display_info.bpc = 8;
144
145 return 1;
146}
147
148static const struct drm_panel_funcs tdo_tl070wsh30_panel_funcs = {
149 .unprepare = tdo_tl070wsh30_panel_unprepare,
150 .prepare = tdo_tl070wsh30_panel_prepare,
151 .get_modes = tdo_tl070wsh30_panel_get_modes,
152};
153
154static const struct of_device_id tdo_tl070wsh30_of_match[] = {
155 { .compatible = "tdo,tl070wsh30", },
156 { }
157};
158MODULE_DEVICE_TABLE(of, tdo_tl070wsh30_of_match);
159
160static int tdo_tl070wsh30_panel_add(struct tdo_tl070wsh30_panel *tdo_tl070wsh30)
161{
162 struct device *dev = &tdo_tl070wsh30->link->dev;
163 int err;
164
165 tdo_tl070wsh30->supply = devm_regulator_get(dev, "power");
166 if (IS_ERR(tdo_tl070wsh30->supply))
167 return PTR_ERR(tdo_tl070wsh30->supply);
168
169 tdo_tl070wsh30->reset_gpio = devm_gpiod_get(dev, "reset",
170 GPIOD_OUT_LOW);
171 if (IS_ERR(tdo_tl070wsh30->reset_gpio)) {
172 err = PTR_ERR(tdo_tl070wsh30->reset_gpio);
173 dev_dbg(dev, "failed to get reset gpio: %d\n", err);
174 return err;
175 }
176
177 drm_panel_init(&tdo_tl070wsh30->base, &tdo_tl070wsh30->link->dev,
178 &tdo_tl070wsh30_panel_funcs, DRM_MODE_CONNECTOR_DSI);
179
180 err = drm_panel_of_backlight(&tdo_tl070wsh30->base);
181 if (err)
182 return err;
183
184 drm_panel_add(&tdo_tl070wsh30->base);
185
186 return 0;
187}
188
189static int tdo_tl070wsh30_panel_probe(struct mipi_dsi_device *dsi)
190{
191 struct tdo_tl070wsh30_panel *tdo_tl070wsh30;
192 int err;
193
194 dsi->lanes = 4;
195 dsi->format = MIPI_DSI_FMT_RGB888;
196 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
197
198 tdo_tl070wsh30 = devm_kzalloc(&dsi->dev, sizeof(*tdo_tl070wsh30),
199 GFP_KERNEL);
200 if (!tdo_tl070wsh30)
201 return -ENOMEM;
202
203 mipi_dsi_set_drvdata(dsi, tdo_tl070wsh30);
204 tdo_tl070wsh30->link = dsi;
205
206 err = tdo_tl070wsh30_panel_add(tdo_tl070wsh30);
207 if (err < 0)
208 return err;
209
210 return mipi_dsi_attach(dsi);
211}
212
213static int tdo_tl070wsh30_panel_remove(struct mipi_dsi_device *dsi)
214{
215 struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
216 int err;
217
218 err = mipi_dsi_detach(dsi);
219 if (err < 0)
220 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
221
222 drm_panel_remove(&tdo_tl070wsh30->base);
223 drm_panel_disable(&tdo_tl070wsh30->base);
224 drm_panel_unprepare(&tdo_tl070wsh30->base);
225
226 return 0;
227}
228
229static void tdo_tl070wsh30_panel_shutdown(struct mipi_dsi_device *dsi)
230{
231 struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
232
233 drm_panel_disable(&tdo_tl070wsh30->base);
234 drm_panel_unprepare(&tdo_tl070wsh30->base);
235}
236
237static struct mipi_dsi_driver tdo_tl070wsh30_panel_driver = {
238 .driver = {
239 .name = "panel-tdo-tl070wsh30",
240 .of_match_table = tdo_tl070wsh30_of_match,
241 },
242 .probe = tdo_tl070wsh30_panel_probe,
243 .remove = tdo_tl070wsh30_panel_remove,
244 .shutdown = tdo_tl070wsh30_panel_shutdown,
245};
246module_mipi_dsi_driver(tdo_tl070wsh30_panel_driver);
247
248MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
249MODULE_DESCRIPTION("TDO TL070WSH30 panel driver");
250MODULE_LICENSE("GPL v2");
251
