]> Git Repo - linux.git/blob - drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[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         .vrefresh       = 60,
107
108         .width_mm       = 154,
109         .height_mm      = 85,
110 };
111
112 static int rb070d30_panel_get_modes(struct drm_panel *panel,
113                                     struct drm_connector *connector)
114 {
115         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
116         struct drm_display_mode *mode;
117         static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
118
119         mode = drm_mode_duplicate(connector->dev, &default_mode);
120         if (!mode) {
121                 DRM_DEV_ERROR(&ctx->dsi->dev,
122                               "Failed to add mode " DRM_MODE_FMT "\n",
123                               DRM_MODE_ARG(&default_mode));
124                 return -EINVAL;
125         }
126
127         drm_mode_set_name(mode);
128
129         mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
130         drm_mode_probed_add(connector, mode);
131
132         connector->display_info.bpc = 8;
133         connector->display_info.width_mm = mode->width_mm;
134         connector->display_info.height_mm = mode->height_mm;
135         drm_display_info_set_bus_formats(&connector->display_info,
136                                          &bus_format, 1);
137
138         return 1;
139 }
140
141 static const struct drm_panel_funcs rb070d30_panel_funcs = {
142         .get_modes      = rb070d30_panel_get_modes,
143         .prepare        = rb070d30_panel_prepare,
144         .enable         = rb070d30_panel_enable,
145         .disable        = rb070d30_panel_disable,
146         .unprepare      = rb070d30_panel_unprepare,
147 };
148
149 static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
150 {
151         struct rb070d30_panel *ctx;
152         int ret;
153
154         ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
155         if (!ctx)
156                 return -ENOMEM;
157
158         ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");
159         if (IS_ERR(ctx->supply))
160                 return PTR_ERR(ctx->supply);
161
162         mipi_dsi_set_drvdata(dsi, ctx);
163         ctx->dsi = dsi;
164
165         drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs,
166                        DRM_MODE_CONNECTOR_DSI);
167
168         ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
169         if (IS_ERR(ctx->gpios.reset)) {
170                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n");
171                 return PTR_ERR(ctx->gpios.reset);
172         }
173
174         ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
175         if (IS_ERR(ctx->gpios.power)) {
176                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our power GPIO\n");
177                 return PTR_ERR(ctx->gpios.power);
178         }
179
180         /*
181          * We don't change the state of that GPIO later on but we need
182          * to force it into a low state.
183          */
184         ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW);
185         if (IS_ERR(ctx->gpios.updn)) {
186                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our updn GPIO\n");
187                 return PTR_ERR(ctx->gpios.updn);
188         }
189
190         /*
191          * We don't change the state of that GPIO later on but we need
192          * to force it into a low state.
193          */
194         ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW);
195         if (IS_ERR(ctx->gpios.shlr)) {
196                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our shlr GPIO\n");
197                 return PTR_ERR(ctx->gpios.shlr);
198         }
199
200         ret = drm_panel_of_backlight(&ctx->panel);
201         if (ret)
202                 return ret;
203
204         ret = drm_panel_add(&ctx->panel);
205         if (ret < 0)
206                 return ret;
207
208         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
209         dsi->format = MIPI_DSI_FMT_RGB888;
210         dsi->lanes = 4;
211
212         return mipi_dsi_attach(dsi);
213 }
214
215 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
216 {
217         struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);
218
219         mipi_dsi_detach(dsi);
220         drm_panel_remove(&ctx->panel);
221
222         return 0;
223 }
224
225 static const struct of_device_id rb070d30_panel_of_match[] = {
226         { .compatible = "ronbo,rb070d30" },
227         { /* sentinel */ },
228 };
229 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);
230
231 static struct mipi_dsi_driver rb070d30_panel_driver = {
232         .probe = rb070d30_panel_dsi_probe,
233         .remove = rb070d30_panel_dsi_remove,
234         .driver = {
235                 .name = "panel-ronbo-rb070d30",
236                 .of_match_table = rb070d30_panel_of_match,
237         },
238 };
239 module_mipi_dsi_driver(rb070d30_panel_driver);
240
241 MODULE_AUTHOR("Boris Brezillon <[email protected]>");
242 MODULE_AUTHOR("Konstantin Sudakov <[email protected]>");
243 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
244 MODULE_LICENSE("GPL");
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