This source file includes following definitions.
- panel_to_feiyang
- feiyang_prepare
- feiyang_enable
- feiyang_disable
- feiyang_unprepare
- feiyang_get_modes
- feiyang_dsi_probe
- feiyang_dsi_remove
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7 #include <drm/drm_mipi_dsi.h>
8 #include <drm/drm_modes.h>
9 #include <drm/drm_panel.h>
10 #include <drm/drm_print.h>
11
12 #include <linux/backlight.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/delay.h>
15 #include <linux/module.h>
16 #include <linux/of_device.h>
17 #include <linux/regulator/consumer.h>
18
19 #define FEIYANG_INIT_CMD_LEN 2
20
21 struct feiyang {
22 struct drm_panel panel;
23 struct mipi_dsi_device *dsi;
24
25 struct backlight_device *backlight;
26 struct regulator *dvdd;
27 struct regulator *avdd;
28 struct gpio_desc *reset;
29 };
30
31 static inline struct feiyang *panel_to_feiyang(struct drm_panel *panel)
32 {
33 return container_of(panel, struct feiyang, panel);
34 }
35
36 struct feiyang_init_cmd {
37 u8 data[FEIYANG_INIT_CMD_LEN];
38 };
39
40 static const struct feiyang_init_cmd feiyang_init_cmds[] = {
41 { .data = { 0x80, 0x58 } },
42 { .data = { 0x81, 0x47 } },
43 { .data = { 0x82, 0xD4 } },
44 { .data = { 0x83, 0x88 } },
45 { .data = { 0x84, 0xA9 } },
46 { .data = { 0x85, 0xC3 } },
47 { .data = { 0x86, 0x82 } },
48 };
49
50 static int feiyang_prepare(struct drm_panel *panel)
51 {
52 struct feiyang *ctx = panel_to_feiyang(panel);
53 struct mipi_dsi_device *dsi = ctx->dsi;
54 unsigned int i;
55 int ret;
56
57 ret = regulator_enable(ctx->dvdd);
58 if (ret)
59 return ret;
60
61
62 msleep(10);
63
64 ret = regulator_enable(ctx->avdd);
65 if (ret)
66 return ret;
67
68
69 msleep(20);
70
71 gpiod_set_value(ctx->reset, 0);
72
73
74
75
76
77 msleep(20);
78
79 gpiod_set_value(ctx->reset, 1);
80
81
82 msleep(200);
83
84 for (i = 0; i < ARRAY_SIZE(feiyang_init_cmds); i++) {
85 const struct feiyang_init_cmd *cmd =
86 &feiyang_init_cmds[i];
87
88 ret = mipi_dsi_dcs_write_buffer(dsi, cmd->data,
89 FEIYANG_INIT_CMD_LEN);
90 if (ret < 0)
91 return ret;
92 }
93
94 return 0;
95 }
96
97 static int feiyang_enable(struct drm_panel *panel)
98 {
99 struct feiyang *ctx = panel_to_feiyang(panel);
100
101
102 msleep(200);
103
104 mipi_dsi_dcs_set_display_on(ctx->dsi);
105 backlight_enable(ctx->backlight);
106
107 return 0;
108 }
109
110 static int feiyang_disable(struct drm_panel *panel)
111 {
112 struct feiyang *ctx = panel_to_feiyang(panel);
113
114 backlight_disable(ctx->backlight);
115 return mipi_dsi_dcs_set_display_off(ctx->dsi);
116 }
117
118 static int feiyang_unprepare(struct drm_panel *panel)
119 {
120 struct feiyang *ctx = panel_to_feiyang(panel);
121 int ret;
122
123 ret = mipi_dsi_dcs_set_display_off(ctx->dsi);
124 if (ret < 0)
125 DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
126 ret);
127
128 ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
129 if (ret < 0)
130 DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
131 ret);
132
133
134 msleep(200);
135
136 gpiod_set_value(ctx->reset, 0);
137
138 regulator_disable(ctx->avdd);
139
140
141 msleep(10);
142
143 regulator_disable(ctx->dvdd);
144
145 return 0;
146 }
147
148 static const struct drm_display_mode feiyang_default_mode = {
149 .clock = 55000,
150
151 .hdisplay = 1024,
152 .hsync_start = 1024 + 310,
153 .hsync_end = 1024 + 310 + 20,
154 .htotal = 1024 + 310 + 20 + 90,
155
156 .vdisplay = 600,
157 .vsync_start = 600 + 12,
158 .vsync_end = 600 + 12 + 2,
159 .vtotal = 600 + 12 + 2 + 21,
160 .vrefresh = 60,
161
162 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
163 };
164
165 static int feiyang_get_modes(struct drm_panel *panel)
166 {
167 struct drm_connector *connector = panel->connector;
168 struct feiyang *ctx = panel_to_feiyang(panel);
169 struct drm_display_mode *mode;
170
171 mode = drm_mode_duplicate(panel->drm, &feiyang_default_mode);
172 if (!mode) {
173 DRM_DEV_ERROR(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",
174 feiyang_default_mode.hdisplay,
175 feiyang_default_mode.vdisplay,
176 feiyang_default_mode.vrefresh);
177 return -ENOMEM;
178 }
179
180 drm_mode_set_name(mode);
181
182 drm_mode_probed_add(connector, mode);
183
184 return 1;
185 }
186
187 static const struct drm_panel_funcs feiyang_funcs = {
188 .disable = feiyang_disable,
189 .unprepare = feiyang_unprepare,
190 .prepare = feiyang_prepare,
191 .enable = feiyang_enable,
192 .get_modes = feiyang_get_modes,
193 };
194
195 static int feiyang_dsi_probe(struct mipi_dsi_device *dsi)
196 {
197 struct feiyang *ctx;
198 int ret;
199
200 ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
201 if (!ctx)
202 return -ENOMEM;
203
204 mipi_dsi_set_drvdata(dsi, ctx);
205 ctx->dsi = dsi;
206
207 drm_panel_init(&ctx->panel);
208 ctx->panel.dev = &dsi->dev;
209 ctx->panel.funcs = &feiyang_funcs;
210
211 ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd");
212 if (IS_ERR(ctx->dvdd)) {
213 DRM_DEV_ERROR(&dsi->dev, "Couldn't get dvdd regulator\n");
214 return PTR_ERR(ctx->dvdd);
215 }
216
217 ctx->avdd = devm_regulator_get(&dsi->dev, "avdd");
218 if (IS_ERR(ctx->avdd)) {
219 DRM_DEV_ERROR(&dsi->dev, "Couldn't get avdd regulator\n");
220 return PTR_ERR(ctx->avdd);
221 }
222
223 ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
224 if (IS_ERR(ctx->reset)) {
225 DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n");
226 return PTR_ERR(ctx->reset);
227 }
228
229 ctx->backlight = devm_of_find_backlight(&dsi->dev);
230 if (IS_ERR(ctx->backlight))
231 return PTR_ERR(ctx->backlight);
232
233 ret = drm_panel_add(&ctx->panel);
234 if (ret < 0)
235 return ret;
236
237 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST;
238 dsi->format = MIPI_DSI_FMT_RGB888;
239 dsi->lanes = 4;
240
241 return mipi_dsi_attach(dsi);
242 }
243
244 static int feiyang_dsi_remove(struct mipi_dsi_device *dsi)
245 {
246 struct feiyang *ctx = mipi_dsi_get_drvdata(dsi);
247
248 mipi_dsi_detach(dsi);
249 drm_panel_remove(&ctx->panel);
250
251 return 0;
252 }
253
254 static const struct of_device_id feiyang_of_match[] = {
255 { .compatible = "feiyang,fy07024di26a30d", },
256 { }
257 };
258 MODULE_DEVICE_TABLE(of, feiyang_of_match);
259
260 static struct mipi_dsi_driver feiyang_driver = {
261 .probe = feiyang_dsi_probe,
262 .remove = feiyang_dsi_remove,
263 .driver = {
264 .name = "feiyang-fy07024di26a30d",
265 .of_match_table = feiyang_of_match,
266 },
267 };
268 module_mipi_dsi_driver(feiyang_driver);
269
270 MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
271 MODULE_DESCRIPTION("Feiyang FY07024DI26A30-D MIPI-DSI LCD panel");
272 MODULE_LICENSE("GPL");