]> Git Repo - linux.git/blob - drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
Merge tag 'batadv-net-for-davem-20200918' of git://git.open-mesh.org/linux-merge
[linux.git] / drivers / gpu / drm / panel / panel-ronbo-rb070d30.c
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/fb.h>
15 #include <linux/kernel.h>
16 #include <linux/media-bus-format.h>
17 #include <linux/module.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 #include <drm/drm_print.h>
27
28 struct rb070d30_panel {
29         struct drm_panel panel;
30         struct mipi_dsi_device *dsi;
31         struct regulator *supply;
32
33         struct {
34                 struct gpio_desc *power;
35                 struct gpio_desc *reset;
36                 struct gpio_desc *updn;
37                 struct gpio_desc *shlr;
38         } gpios;
39 };
40
41 static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel)
42 {
43         return container_of(panel, struct rb070d30_panel, panel);
44 }
45
46 static int rb070d30_panel_prepare(struct drm_panel *panel)
47 {
48         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
49         int ret;
50
51         ret = regulator_enable(ctx->supply);
52         if (ret < 0) {
53                 DRM_DEV_ERROR(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret);
54                 return ret;
55         }
56
57         msleep(20);
58         gpiod_set_value(ctx->gpios.power, 1);
59         msleep(20);
60         gpiod_set_value(ctx->gpios.reset, 1);
61         msleep(20);
62         return 0;
63 }
64
65 static int rb070d30_panel_unprepare(struct drm_panel *panel)
66 {
67         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
68
69         gpiod_set_value(ctx->gpios.reset, 0);
70         gpiod_set_value(ctx->gpios.power, 0);
71         regulator_disable(ctx->supply);
72
73         return 0;
74 }
75
76 static int rb070d30_panel_enable(struct drm_panel *panel)
77 {
78         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
79         int ret;
80
81         ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
82         if (ret)
83                 return ret;
84
85         return 0;
86 }
87
88 static int rb070d30_panel_disable(struct drm_panel *panel)
89 {
90         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
91
92         return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
93 }
94
95 /* Default timings */
96 static const struct drm_display_mode default_mode = {
97         .clock          = 51206,
98         .hdisplay       = 1024,
99         .hsync_start    = 1024 + 160,
100         .hsync_end      = 1024 + 160 + 80,
101         .htotal         = 1024 + 160 + 80 + 80,
102         .vdisplay       = 600,
103         .vsync_start    = 600 + 12,
104         .vsync_end      = 600 + 12 + 10,
105         .vtotal         = 600 + 12 + 10 + 13,
106
107         .width_mm       = 154,
108         .height_mm      = 85,
109 };
110
111 static int rb070d30_panel_get_modes(struct drm_panel *panel,
112                                     struct drm_connector *connector)
113 {
114         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
115         struct drm_display_mode *mode;
116         static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
117
118         mode = drm_mode_duplicate(connector->dev, &default_mode);
119         if (!mode) {
120                 DRM_DEV_ERROR(&ctx->dsi->dev,
121                               "Failed to add mode " DRM_MODE_FMT "\n",
122                               DRM_MODE_ARG(&default_mode));
123                 return -EINVAL;
124         }
125
126         drm_mode_set_name(mode);
127
128         mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
129         drm_mode_probed_add(connector, mode);
130
131         connector->display_info.bpc = 8;
132         connector->display_info.width_mm = mode->width_mm;
133         connector->display_info.height_mm = mode->height_mm;
134         drm_display_info_set_bus_formats(&connector->display_info,
135                                          &bus_format, 1);
136
137         return 1;
138 }
139
140 static const struct drm_panel_funcs rb070d30_panel_funcs = {
141         .get_modes      = rb070d30_panel_get_modes,
142         .prepare        = rb070d30_panel_prepare,
143         .enable         = rb070d30_panel_enable,
144         .disable        = rb070d30_panel_disable,
145         .unprepare      = rb070d30_panel_unprepare,
146 };
147
148 static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
149 {
150         struct rb070d30_panel *ctx;
151         int ret;
152
153         ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
154         if (!ctx)
155                 return -ENOMEM;
156
157         ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");
158         if (IS_ERR(ctx->supply))
159                 return PTR_ERR(ctx->supply);
160
161         mipi_dsi_set_drvdata(dsi, ctx);
162         ctx->dsi = dsi;
163
164         drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs,
165                        DRM_MODE_CONNECTOR_DSI);
166
167         ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
168         if (IS_ERR(ctx->gpios.reset)) {
169                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n");
170                 return PTR_ERR(ctx->gpios.reset);
171         }
172
173         ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
174         if (IS_ERR(ctx->gpios.power)) {
175                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our power GPIO\n");
176                 return PTR_ERR(ctx->gpios.power);
177         }
178
179         /*
180          * We don't change the state of that GPIO later on but we need
181          * to force it into a low state.
182          */
183         ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW);
184         if (IS_ERR(ctx->gpios.updn)) {
185                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our updn GPIO\n");
186                 return PTR_ERR(ctx->gpios.updn);
187         }
188
189         /*
190          * We don't change the state of that GPIO later on but we need
191          * to force it into a low state.
192          */
193         ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW);
194         if (IS_ERR(ctx->gpios.shlr)) {
195                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our shlr GPIO\n");
196                 return PTR_ERR(ctx->gpios.shlr);
197         }
198
199         ret = drm_panel_of_backlight(&ctx->panel);
200         if (ret)
201                 return ret;
202
203         ret = drm_panel_add(&ctx->panel);
204         if (ret < 0)
205                 return ret;
206
207         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
208         dsi->format = MIPI_DSI_FMT_RGB888;
209         dsi->lanes = 4;
210
211         return mipi_dsi_attach(dsi);
212 }
213
214 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
215 {
216         struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);
217
218         mipi_dsi_detach(dsi);
219         drm_panel_remove(&ctx->panel);
220
221         return 0;
222 }
223
224 static const struct of_device_id rb070d30_panel_of_match[] = {
225         { .compatible = "ronbo,rb070d30" },
226         { /* sentinel */ },
227 };
228 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);
229
230 static struct mipi_dsi_driver rb070d30_panel_driver = {
231         .probe = rb070d30_panel_dsi_probe,
232         .remove = rb070d30_panel_dsi_remove,
233         .driver = {
234                 .name = "panel-ronbo-rb070d30",
235                 .of_match_table = rb070d30_panel_of_match,
236         },
237 };
238 module_mipi_dsi_driver(rb070d30_panel_driver);
239
240 MODULE_AUTHOR("Boris Brezillon <[email protected]>");
241 MODULE_AUTHOR("Konstantin Sudakov <[email protected]>");
242 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
243 MODULE_LICENSE("GPL");
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