Merge tag 'drm-intel-next-2019-10-07' of git://anongit.freedesktop.org/drm/drm-intel...
[linux-2.6-microblaze.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/backlight.h>
11 #include <linux/delay.h>
12 #include <linux/device.h>
13 #include <linux/err.h>
14 #include <linux/errno.h>
15 #include <linux/fb.h>
16 #include <linux/kernel.h>
17 #include <linux/media-bus-format.h>
18 #include <linux/module.h>
19
20 #include <linux/gpio/consumer.h>
21 #include <linux/regulator/consumer.h>
22
23 #include <drm/drm_connector.h>
24 #include <drm/drm_mipi_dsi.h>
25 #include <drm/drm_modes.h>
26 #include <drm/drm_panel.h>
27 #include <drm/drm_print.h>
28
29 struct rb070d30_panel {
30         struct drm_panel panel;
31         struct mipi_dsi_device *dsi;
32         struct backlight_device *backlight;
33         struct regulator *supply;
34
35         struct {
36                 struct gpio_desc *power;
37                 struct gpio_desc *reset;
38                 struct gpio_desc *updn;
39                 struct gpio_desc *shlr;
40         } gpios;
41 };
42
43 static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel)
44 {
45         return container_of(panel, struct rb070d30_panel, panel);
46 }
47
48 static int rb070d30_panel_prepare(struct drm_panel *panel)
49 {
50         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
51         int ret;
52
53         ret = regulator_enable(ctx->supply);
54         if (ret < 0) {
55                 DRM_DEV_ERROR(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret);
56                 return ret;
57         }
58
59         msleep(20);
60         gpiod_set_value(ctx->gpios.power, 1);
61         msleep(20);
62         gpiod_set_value(ctx->gpios.reset, 1);
63         msleep(20);
64         return 0;
65 }
66
67 static int rb070d30_panel_unprepare(struct drm_panel *panel)
68 {
69         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
70
71         gpiod_set_value(ctx->gpios.reset, 0);
72         gpiod_set_value(ctx->gpios.power, 0);
73         regulator_disable(ctx->supply);
74
75         return 0;
76 }
77
78 static int rb070d30_panel_enable(struct drm_panel *panel)
79 {
80         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
81         int ret;
82
83         ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
84         if (ret)
85                 return ret;
86
87         ret = backlight_enable(ctx->backlight);
88         if (ret)
89                 goto out;
90
91         return 0;
92
93 out:
94         mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
95         return ret;
96 }
97
98 static int rb070d30_panel_disable(struct drm_panel *panel)
99 {
100         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
101
102         backlight_disable(ctx->backlight);
103         return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
104 }
105
106 /* Default timings */
107 static const struct drm_display_mode default_mode = {
108         .clock          = 51206,
109         .hdisplay       = 1024,
110         .hsync_start    = 1024 + 160,
111         .hsync_end      = 1024 + 160 + 80,
112         .htotal         = 1024 + 160 + 80 + 80,
113         .vdisplay       = 600,
114         .vsync_start    = 600 + 12,
115         .vsync_end      = 600 + 12 + 10,
116         .vtotal         = 600 + 12 + 10 + 13,
117         .vrefresh       = 60,
118
119         .width_mm       = 154,
120         .height_mm      = 85,
121 };
122
123 static int rb070d30_panel_get_modes(struct drm_panel *panel)
124 {
125         struct drm_connector *connector = panel->connector;
126         struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
127         struct drm_display_mode *mode;
128         static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
129
130         mode = drm_mode_duplicate(panel->drm, &default_mode);
131         if (!mode) {
132                 DRM_DEV_ERROR(&ctx->dsi->dev,
133                               "Failed to add mode " DRM_MODE_FMT "\n",
134                               DRM_MODE_ARG(&default_mode));
135                 return -EINVAL;
136         }
137
138         drm_mode_set_name(mode);
139
140         mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
141         drm_mode_probed_add(connector, mode);
142
143         panel->connector->display_info.bpc = 8;
144         panel->connector->display_info.width_mm = mode->width_mm;
145         panel->connector->display_info.height_mm = mode->height_mm;
146         drm_display_info_set_bus_formats(&connector->display_info,
147                                          &bus_format, 1);
148
149         return 1;
150 }
151
152 static const struct drm_panel_funcs rb070d30_panel_funcs = {
153         .get_modes      = rb070d30_panel_get_modes,
154         .prepare        = rb070d30_panel_prepare,
155         .enable         = rb070d30_panel_enable,
156         .disable        = rb070d30_panel_disable,
157         .unprepare      = rb070d30_panel_unprepare,
158 };
159
160 static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
161 {
162         struct rb070d30_panel *ctx;
163         int ret;
164
165         ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
166         if (!ctx)
167                 return -ENOMEM;
168
169         ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");
170         if (IS_ERR(ctx->supply))
171                 return PTR_ERR(ctx->supply);
172
173         mipi_dsi_set_drvdata(dsi, ctx);
174         ctx->dsi = dsi;
175
176         drm_panel_init(&ctx->panel);
177         ctx->panel.dev = &dsi->dev;
178         ctx->panel.funcs = &rb070d30_panel_funcs;
179
180         ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
181         if (IS_ERR(ctx->gpios.reset)) {
182                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n");
183                 return PTR_ERR(ctx->gpios.reset);
184         }
185
186         ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
187         if (IS_ERR(ctx->gpios.power)) {
188                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our power GPIO\n");
189                 return PTR_ERR(ctx->gpios.power);
190         }
191
192         /*
193          * We don't change the state of that GPIO later on but we need
194          * to force it into a low state.
195          */
196         ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW);
197         if (IS_ERR(ctx->gpios.updn)) {
198                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our updn GPIO\n");
199                 return PTR_ERR(ctx->gpios.updn);
200         }
201
202         /*
203          * We don't change the state of that GPIO later on but we need
204          * to force it into a low state.
205          */
206         ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW);
207         if (IS_ERR(ctx->gpios.shlr)) {
208                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our shlr GPIO\n");
209                 return PTR_ERR(ctx->gpios.shlr);
210         }
211
212         ctx->backlight = devm_of_find_backlight(&dsi->dev);
213         if (IS_ERR(ctx->backlight)) {
214                 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our backlight\n");
215                 return PTR_ERR(ctx->backlight);
216         }
217
218         ret = drm_panel_add(&ctx->panel);
219         if (ret < 0)
220                 return ret;
221
222         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
223         dsi->format = MIPI_DSI_FMT_RGB888;
224         dsi->lanes = 4;
225
226         return mipi_dsi_attach(dsi);
227 }
228
229 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
230 {
231         struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);
232
233         mipi_dsi_detach(dsi);
234         drm_panel_remove(&ctx->panel);
235
236         return 0;
237 }
238
239 static const struct of_device_id rb070d30_panel_of_match[] = {
240         { .compatible = "ronbo,rb070d30" },
241         { /* sentinel */ },
242 };
243 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);
244
245 static struct mipi_dsi_driver rb070d30_panel_driver = {
246         .probe = rb070d30_panel_dsi_probe,
247         .remove = rb070d30_panel_dsi_remove,
248         .driver = {
249                 .name = "panel-ronbo-rb070d30",
250                 .of_match_table = rb070d30_panel_of_match,
251         },
252 };
253 module_mipi_dsi_driver(rb070d30_panel_driver);
254
255 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");
256 MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>");
257 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
258 MODULE_LICENSE("GPL");