Merge tag 'for-5.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[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/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
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(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(20);
57         gpiod_set_value(ctx->gpios.power, 1);
58         msleep(20);
59         gpiod_set_value(ctx->gpios.reset, 1);
60         msleep(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(ctx->gpios.reset, 0);
69         gpiod_set_value(ctx->gpios.power, 0);
70         regulator_disable(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(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(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(connector->dev, &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(&connector->display_info,
128                                          &bus_format, 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(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
147         if (!ctx)
148                 return -ENOMEM;
149
150         ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");
151         if (IS_ERR(ctx->supply))
152                 return PTR_ERR(ctx->supply);
153
154         mipi_dsi_set_drvdata(dsi, ctx);
155         ctx->dsi = dsi;
156
157         drm_panel_init(&ctx->panel, &dsi->dev, &rb070d30_panel_funcs,
158                        DRM_MODE_CONNECTOR_DSI);
159
160         ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
161         if (IS_ERR(ctx->gpios.reset)) {
162                 dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
163                 return PTR_ERR(ctx->gpios.reset);
164         }
165
166         ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
167         if (IS_ERR(ctx->gpios.power)) {
168                 dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
169                 return PTR_ERR(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(&dsi->dev, "updn", GPIOD_OUT_LOW);
177         if (IS_ERR(ctx->gpios.updn)) {
178                 dev_err(&dsi->dev, "Couldn't get our updn GPIO\n");
179                 return PTR_ERR(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(&dsi->dev, "shlr", GPIOD_OUT_LOW);
187         if (IS_ERR(ctx->gpios.shlr)) {
188                 dev_err(&dsi->dev, "Couldn't get our shlr GPIO\n");
189                 return PTR_ERR(ctx->gpios.shlr);
190         }
191
192         ret = drm_panel_of_backlight(&ctx->panel);
193         if (ret)
194                 return ret;
195
196         drm_panel_add(&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         return mipi_dsi_attach(dsi);
203 }
204
205 static int rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
206 {
207         struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);
208
209         mipi_dsi_detach(dsi);
210         drm_panel_remove(&ctx->panel);
211
212         return 0;
213 }
214
215 static const struct of_device_id rb070d30_panel_of_match[] = {
216         { .compatible = "ronbo,rb070d30" },
217         { /* sentinel */ },
218 };
219 MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);
220
221 static struct mipi_dsi_driver rb070d30_panel_driver = {
222         .probe = rb070d30_panel_dsi_probe,
223         .remove = rb070d30_panel_dsi_remove,
224         .driver = {
225                 .name = "panel-ronbo-rb070d30",
226                 .of_match_table = rb070d30_panel_of_match,
227         },
228 };
229 module_mipi_dsi_driver(rb070d30_panel_driver);
230
231 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");
232 MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>");
233 MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
234 MODULE_LICENSE("GPL");