1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Copyright (C) 2018-2019, Bridge Systems BV |
4 | * Copyright (C) 2018-2019, Bootlin |
5 | * Copyright (C) 2017, Free Electrons |
6 | * |
7 | * This file based on panel-ilitek-ili9881c.c |
8 | */ |
9 | |
10 | #include <linux/delay.h> |
11 | #include <linux/device.h> |
12 | #include <linux/err.h> |
13 | #include <linux/errno.h> |
14 | #include <linux/kernel.h> |
15 | #include <linux/media-bus-format.h> |
16 | #include <linux/module.h> |
17 | #include <linux/of.h> |
18 | |
19 | #include <linux/gpio/consumer.h> |
20 | #include <linux/regulator/consumer.h> |
21 | |
22 | #include <drm/drm_connector.h> |
23 | #include <drm/drm_mipi_dsi.h> |
24 | #include <drm/drm_modes.h> |
25 | #include <drm/drm_panel.h> |
26 | |
27 | struct rb070d30_panel { |
28 | struct drm_panel panel; |
29 | struct mipi_dsi_device *dsi; |
30 | struct regulator *supply; |
31 | |
32 | struct { |
33 | struct gpio_desc *power; |
34 | struct gpio_desc *reset; |
35 | struct gpio_desc *updn; |
36 | struct gpio_desc *shlr; |
37 | } gpios; |
38 | }; |
39 | |
40 | static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel) |
41 | { |
42 | return container_of(panel, struct rb070d30_panel, panel); |
43 | } |
44 | |
45 | static int rb070d30_panel_prepare(struct drm_panel *panel) |
46 | { |
47 | struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
48 | int ret; |
49 | |
50 | ret = regulator_enable(regulator: ctx->supply); |
51 | if (ret < 0) { |
52 | dev_err(&ctx->dsi->dev, "Failed to enable supply: %d\n" , ret); |
53 | return ret; |
54 | } |
55 | |
56 | msleep(msecs: 20); |
57 | gpiod_set_value(desc: ctx->gpios.power, value: 1); |
58 | msleep(msecs: 20); |
59 | gpiod_set_value(desc: ctx->gpios.reset, value: 1); |
60 | msleep(msecs: 20); |
61 | return 0; |
62 | } |
63 | |
64 | static int rb070d30_panel_unprepare(struct drm_panel *panel) |
65 | { |
66 | struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
67 | |
68 | gpiod_set_value(desc: ctx->gpios.reset, value: 0); |
69 | gpiod_set_value(desc: ctx->gpios.power, value: 0); |
70 | regulator_disable(regulator: ctx->supply); |
71 | |
72 | return 0; |
73 | } |
74 | |
75 | static int rb070d30_panel_enable(struct drm_panel *panel) |
76 | { |
77 | struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
78 | |
79 | return mipi_dsi_dcs_exit_sleep_mode(dsi: ctx->dsi); |
80 | } |
81 | |
82 | static int rb070d30_panel_disable(struct drm_panel *panel) |
83 | { |
84 | struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
85 | |
86 | return mipi_dsi_dcs_enter_sleep_mode(dsi: ctx->dsi); |
87 | } |
88 | |
89 | /* Default timings */ |
90 | static const struct drm_display_mode default_mode = { |
91 | .clock = 51206, |
92 | .hdisplay = 1024, |
93 | .hsync_start = 1024 + 160, |
94 | .hsync_end = 1024 + 160 + 80, |
95 | .htotal = 1024 + 160 + 80 + 80, |
96 | .vdisplay = 600, |
97 | .vsync_start = 600 + 12, |
98 | .vsync_end = 600 + 12 + 10, |
99 | .vtotal = 600 + 12 + 10 + 13, |
100 | |
101 | .width_mm = 154, |
102 | .height_mm = 85, |
103 | }; |
104 | |
105 | static int rb070d30_panel_get_modes(struct drm_panel *panel, |
106 | struct drm_connector *connector) |
107 | { |
108 | struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel); |
109 | struct drm_display_mode *mode; |
110 | static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
111 | |
112 | mode = drm_mode_duplicate(dev: connector->dev, mode: &default_mode); |
113 | if (!mode) { |
114 | dev_err(&ctx->dsi->dev, "Failed to add mode " DRM_MODE_FMT "\n" , |
115 | DRM_MODE_ARG(&default_mode)); |
116 | return -EINVAL; |
117 | } |
118 | |
119 | drm_mode_set_name(mode); |
120 | |
121 | mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; |
122 | drm_mode_probed_add(connector, mode); |
123 | |
124 | connector->display_info.bpc = 8; |
125 | connector->display_info.width_mm = mode->width_mm; |
126 | connector->display_info.height_mm = mode->height_mm; |
127 | drm_display_info_set_bus_formats(info: &connector->display_info, |
128 | formats: &bus_format, num_formats: 1); |
129 | |
130 | return 1; |
131 | } |
132 | |
133 | static const struct drm_panel_funcs rb070d30_panel_funcs = { |
134 | .get_modes = rb070d30_panel_get_modes, |
135 | .prepare = rb070d30_panel_prepare, |
136 | .enable = rb070d30_panel_enable, |
137 | .disable = rb070d30_panel_disable, |
138 | .unprepare = rb070d30_panel_unprepare, |
139 | }; |
140 | |
141 | static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi) |
142 | { |
143 | struct rb070d30_panel *ctx; |
144 | int ret; |
145 | |
146 | ctx = devm_kzalloc(dev: &dsi->dev, size: sizeof(*ctx), GFP_KERNEL); |
147 | if (!ctx) |
148 | return -ENOMEM; |
149 | |
150 | ctx->supply = devm_regulator_get(dev: &dsi->dev, id: "vcc-lcd" ); |
151 | if (IS_ERR(ptr: ctx->supply)) |
152 | return PTR_ERR(ptr: ctx->supply); |
153 | |
154 | mipi_dsi_set_drvdata(dsi, data: ctx); |
155 | ctx->dsi = dsi; |
156 | |
157 | drm_panel_init(panel: &ctx->panel, dev: &dsi->dev, funcs: &rb070d30_panel_funcs, |
158 | DRM_MODE_CONNECTOR_DSI); |
159 | |
160 | ctx->gpios.reset = devm_gpiod_get(dev: &dsi->dev, con_id: "reset" , flags: GPIOD_OUT_LOW); |
161 | if (IS_ERR(ptr: ctx->gpios.reset)) { |
162 | dev_err(&dsi->dev, "Couldn't get our reset GPIO\n" ); |
163 | return PTR_ERR(ptr: ctx->gpios.reset); |
164 | } |
165 | |
166 | ctx->gpios.power = devm_gpiod_get(dev: &dsi->dev, con_id: "power" , flags: GPIOD_OUT_LOW); |
167 | if (IS_ERR(ptr: ctx->gpios.power)) { |
168 | dev_err(&dsi->dev, "Couldn't get our power GPIO\n" ); |
169 | return PTR_ERR(ptr: ctx->gpios.power); |
170 | } |
171 | |
172 | /* |
173 | * We don't change the state of that GPIO later on but we need |
174 | * to force it into a low state. |
175 | */ |
176 | ctx->gpios.updn = devm_gpiod_get(dev: &dsi->dev, con_id: "updn" , flags: GPIOD_OUT_LOW); |
177 | if (IS_ERR(ptr: ctx->gpios.updn)) { |
178 | dev_err(&dsi->dev, "Couldn't get our updn GPIO\n" ); |
179 | return PTR_ERR(ptr: ctx->gpios.updn); |
180 | } |
181 | |
182 | /* |
183 | * We don't change the state of that GPIO later on but we need |
184 | * to force it into a low state. |
185 | */ |
186 | ctx->gpios.shlr = devm_gpiod_get(dev: &dsi->dev, con_id: "shlr" , flags: GPIOD_OUT_LOW); |
187 | if (IS_ERR(ptr: ctx->gpios.shlr)) { |
188 | dev_err(&dsi->dev, "Couldn't get our shlr GPIO\n" ); |
189 | return PTR_ERR(ptr: ctx->gpios.shlr); |
190 | } |
191 | |
192 | ret = drm_panel_of_backlight(panel: &ctx->panel); |
193 | if (ret) |
194 | return ret; |
195 | |
196 | drm_panel_add(panel: &ctx->panel); |
197 | |
198 | dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM; |
199 | dsi->format = MIPI_DSI_FMT_RGB888; |
200 | dsi->lanes = 4; |
201 | |
202 | ret = mipi_dsi_attach(dsi); |
203 | if (ret < 0) { |
204 | drm_panel_remove(panel: &ctx->panel); |
205 | return ret; |
206 | } |
207 | |
208 | return 0; |
209 | } |
210 | |
211 | static void rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi) |
212 | { |
213 | struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi); |
214 | |
215 | mipi_dsi_detach(dsi); |
216 | drm_panel_remove(panel: &ctx->panel); |
217 | } |
218 | |
219 | static const struct of_device_id rb070d30_panel_of_match[] = { |
220 | { .compatible = "ronbo,rb070d30" }, |
221 | { /* sentinel */ }, |
222 | }; |
223 | MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match); |
224 | |
225 | static struct mipi_dsi_driver rb070d30_panel_driver = { |
226 | .probe = rb070d30_panel_dsi_probe, |
227 | .remove = rb070d30_panel_dsi_remove, |
228 | .driver = { |
229 | .name = "panel-ronbo-rb070d30" , |
230 | .of_match_table = rb070d30_panel_of_match, |
231 | }, |
232 | }; |
233 | module_mipi_dsi_driver(rb070d30_panel_driver); |
234 | |
235 | MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>" ); |
236 | MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>" ); |
237 | MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver" ); |
238 | MODULE_LICENSE("GPL" ); |
239 | |