1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2018 Amarula Solutions
4 * Author: Jagan Teki <jagan@amarulasolutions.com>
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>
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>
19 #define FEIYANG_INIT_CMD_LEN 2
22 struct drm_panel panel;
23 struct mipi_dsi_device *dsi;
25 struct backlight_device *backlight;
26 struct regulator *dvdd;
27 struct regulator *avdd;
28 struct gpio_desc *reset;
31 static inline struct feiyang *panel_to_feiyang(struct drm_panel *panel)
33 return container_of(panel, struct feiyang, panel);
36 struct feiyang_init_cmd {
37 u8 data[FEIYANG_INIT_CMD_LEN];
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 } },
50 static int feiyang_prepare(struct drm_panel *panel)
52 struct feiyang *ctx = panel_to_feiyang(panel);
53 struct mipi_dsi_device *dsi = ctx->dsi;
57 ret = regulator_enable(ctx->dvdd);
61 /* T1 (dvdd start + dvdd rise) 0 < T1 <= 10ms */
64 ret = regulator_enable(ctx->avdd);
68 /* T3 (dvdd rise + avdd start + avdd rise) T3 >= 20ms */
71 gpiod_set_value(ctx->reset, 0);
74 * T5 + T6 (avdd rise + video & logic signal rise)
75 * T5 >= 10ms, 0 < T6 <= 10ms
79 gpiod_set_value(ctx->reset, 1);
81 /* T12 (video & logic signal rise + backlight rise) T12 >= 200ms */
84 for (i = 0; i < ARRAY_SIZE(feiyang_init_cmds); i++) {
85 const struct feiyang_init_cmd *cmd =
86 &feiyang_init_cmds[i];
88 ret = mipi_dsi_dcs_write_buffer(dsi, cmd->data,
89 FEIYANG_INIT_CMD_LEN);
97 static int feiyang_enable(struct drm_panel *panel)
99 struct feiyang *ctx = panel_to_feiyang(panel);
101 /* T12 (video & logic signal rise + backlight rise) T12 >= 200ms */
104 mipi_dsi_dcs_set_display_on(ctx->dsi);
105 backlight_enable(ctx->backlight);
110 static int feiyang_disable(struct drm_panel *panel)
112 struct feiyang *ctx = panel_to_feiyang(panel);
114 backlight_disable(ctx->backlight);
115 return mipi_dsi_dcs_set_display_off(ctx->dsi);
118 static int feiyang_unprepare(struct drm_panel *panel)
120 struct feiyang *ctx = panel_to_feiyang(panel);
123 ret = mipi_dsi_dcs_set_display_off(ctx->dsi);
125 DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
128 ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
130 DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
133 /* T13 (backlight fall + video & logic signal fall) T13 >= 200ms */
136 gpiod_set_value(ctx->reset, 0);
138 regulator_disable(ctx->avdd);
140 /* T11 (dvdd rise to fall) 0 < T11 <= 10ms */
143 regulator_disable(ctx->dvdd);
148 static const struct drm_display_mode feiyang_default_mode = {
152 .hsync_start = 1024 + 310,
153 .hsync_end = 1024 + 310 + 20,
154 .htotal = 1024 + 310 + 20 + 90,
157 .vsync_start = 600 + 12,
158 .vsync_end = 600 + 12 + 2,
159 .vtotal = 600 + 12 + 2 + 21,
162 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
165 static int feiyang_get_modes(struct drm_panel *panel)
167 struct drm_connector *connector = panel->connector;
168 struct feiyang *ctx = panel_to_feiyang(panel);
169 struct drm_display_mode *mode;
171 mode = drm_mode_duplicate(panel->drm, &feiyang_default_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);
180 drm_mode_set_name(mode);
182 drm_mode_probed_add(connector, mode);
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,
195 static int feiyang_dsi_probe(struct mipi_dsi_device *dsi)
200 ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
204 mipi_dsi_set_drvdata(dsi, ctx);
207 drm_panel_init(&ctx->panel);
208 ctx->panel.dev = &dsi->dev;
209 ctx->panel.funcs = &feiyang_funcs;
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);
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);
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);
229 ctx->backlight = devm_of_find_backlight(&dsi->dev);
230 if (IS_ERR(ctx->backlight))
231 return PTR_ERR(ctx->backlight);
233 ret = drm_panel_add(&ctx->panel);
237 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST;
238 dsi->format = MIPI_DSI_FMT_RGB888;
241 return mipi_dsi_attach(dsi);
244 static int feiyang_dsi_remove(struct mipi_dsi_device *dsi)
246 struct feiyang *ctx = mipi_dsi_get_drvdata(dsi);
248 mipi_dsi_detach(dsi);
249 drm_panel_remove(&ctx->panel);
254 static const struct of_device_id feiyang_of_match[] = {
255 { .compatible = "feiyang,fy07024di26a30d", },
258 MODULE_DEVICE_TABLE(of, feiyang_of_match);
260 static struct mipi_dsi_driver feiyang_driver = {
261 .probe = feiyang_dsi_probe,
262 .remove = feiyang_dsi_remove,
264 .name = "feiyang-fy07024di26a30d",
265 .of_match_table = feiyang_of_match,
268 module_mipi_dsi_driver(feiyang_driver);
270 MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
271 MODULE_DESCRIPTION("Feiyang FY07024DI26A30-D MIPI-DSI LCD panel");
272 MODULE_LICENSE("GPL");