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