1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2020 Casey Connolly <casey.connolly@linaro.org>
3 * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
4 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
5 */
6
7 #include <linux/delay.h>
8 #include <linux/gpio/consumer.h>
9 #include <linux/module.h>
10 #include <linux/of.h>
11 #include <linux/regulator/consumer.h>
12 #include <linux/backlight.h>
13
14 #include <video/mipi_display.h>
15
16 #include <drm/drm_mipi_dsi.h>
17 #include <drm/drm_modes.h>
18 #include <drm/drm_panel.h>
19 #include <drm/drm_probe_helper.h>
20
21 struct sofef00_panel {
22 struct drm_panel panel;
23 struct mipi_dsi_device *dsi;
24 struct regulator_bulk_data *supplies;
25 struct gpio_desc *reset_gpio;
26 };
27
28 static const struct regulator_bulk_data sofef00_supplies[] = {
29 { .supply = "vddio" },
30 { .supply = "vci" },
31 { .supply = "poc" },
32 };
33
34 static inline
to_sofef00_panel(struct drm_panel * panel)35 struct sofef00_panel *to_sofef00_panel(struct drm_panel *panel)
36 {
37 return container_of(panel, struct sofef00_panel, panel);
38 }
39
40 #define sofef00_test_key_on_lvl2(ctx) \
41 mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0x5a, 0x5a)
42 #define sofef00_test_key_off_lvl2(ctx) \
43 mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0xa5, 0xa5)
44
sofef00_panel_reset(struct sofef00_panel * ctx)45 static void sofef00_panel_reset(struct sofef00_panel *ctx)
46 {
47 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
48 usleep_range(5000, 6000);
49 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
50 usleep_range(2000, 3000);
51 gpiod_set_value_cansleep(ctx->reset_gpio, 0);
52 usleep_range(12000, 13000);
53 }
54
sofef00_panel_on(struct sofef00_panel * ctx)55 static int sofef00_panel_on(struct sofef00_panel *ctx)
56 {
57 struct mipi_dsi_device *dsi = ctx->dsi;
58 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
59
60 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
61
62 mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
63 mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
64
65 sofef00_test_key_on_lvl2(&dsi_ctx);
66 mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
67 sofef00_test_key_off_lvl2(&dsi_ctx);
68
69 sofef00_test_key_on_lvl2(&dsi_ctx);
70 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x07);
71 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb6, 0x12);
72 sofef00_test_key_off_lvl2(&dsi_ctx);
73
74 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
75 mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
76
77 return dsi_ctx.accum_err;
78 }
79
sofef00_enable(struct drm_panel * panel)80 static int sofef00_enable(struct drm_panel *panel)
81 {
82 struct sofef00_panel *ctx = to_sofef00_panel(panel);
83 struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
84
85 mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
86
87 return dsi_ctx.accum_err;
88 }
89
sofef00_panel_off(struct sofef00_panel * ctx)90 static int sofef00_panel_off(struct sofef00_panel *ctx)
91 {
92 struct mipi_dsi_device *dsi = ctx->dsi;
93 struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
94
95 mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
96 mipi_dsi_msleep(&dsi_ctx, 40);
97
98 mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
99 mipi_dsi_msleep(&dsi_ctx, 160);
100
101 return dsi_ctx.accum_err;
102 }
103
sofef00_panel_prepare(struct drm_panel * panel)104 static int sofef00_panel_prepare(struct drm_panel *panel)
105 {
106 struct sofef00_panel *ctx = to_sofef00_panel(panel);
107 int ret;
108
109 ret = regulator_bulk_enable(ARRAY_SIZE(sofef00_supplies), ctx->supplies);
110 if (ret < 0)
111 return ret;
112
113 sofef00_panel_reset(ctx);
114
115 ret = sofef00_panel_on(ctx);
116 if (ret < 0) {
117 gpiod_set_value_cansleep(ctx->reset_gpio, 1);
118 regulator_bulk_disable(ARRAY_SIZE(sofef00_supplies), ctx->supplies);
119 return ret;
120 }
121
122 return 0;
123 }
124
sofef00_disable(struct drm_panel * panel)125 static int sofef00_disable(struct drm_panel *panel)
126 {
127 struct sofef00_panel *ctx = to_sofef00_panel(panel);
128
129 sofef00_panel_off(ctx);
130
131 return 0;
132 }
133
sofef00_panel_unprepare(struct drm_panel * panel)134 static int sofef00_panel_unprepare(struct drm_panel *panel)
135 {
136 struct sofef00_panel *ctx = to_sofef00_panel(panel);
137
138 regulator_bulk_disable(ARRAY_SIZE(sofef00_supplies), ctx->supplies);
139
140 return 0;
141 }
142
143 static const struct drm_display_mode ams628nw01_panel_mode = {
144 .clock = (1080 + 112 + 16 + 36) * (2280 + 36 + 8 + 12) * 60 / 1000,
145
146 .hdisplay = 1080,
147 .hsync_start = 1080 + 112,
148 .hsync_end = 1080 + 112 + 16,
149 .htotal = 1080 + 112 + 16 + 36,
150
151 .vdisplay = 2280,
152 .vsync_start = 2280 + 36,
153 .vsync_end = 2280 + 36 + 8,
154 .vtotal = 2280 + 36 + 8 + 12,
155
156 .width_mm = 68,
157 .height_mm = 145,
158
159 .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
160 };
161
sofef00_panel_get_modes(struct drm_panel * panel,struct drm_connector * connector)162 static int sofef00_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector)
163 {
164 return drm_connector_helper_get_modes_fixed(connector, &ams628nw01_panel_mode);
165 }
166
167 static const struct drm_panel_funcs sofef00_panel_panel_funcs = {
168 .prepare = sofef00_panel_prepare,
169 .enable = sofef00_enable,
170 .disable = sofef00_disable,
171 .unprepare = sofef00_panel_unprepare,
172 .get_modes = sofef00_panel_get_modes,
173 };
174
sofef00_panel_bl_update_status(struct backlight_device * bl)175 static int sofef00_panel_bl_update_status(struct backlight_device *bl)
176 {
177 struct mipi_dsi_device *dsi = bl_get_data(bl);
178 int err;
179 u16 brightness = (u16)backlight_get_brightness(bl);
180
181 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
182
183 err = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
184 if (err < 0)
185 return err;
186
187 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
188
189 return 0;
190 }
191
192 static const struct backlight_ops sofef00_panel_bl_ops = {
193 .update_status = sofef00_panel_bl_update_status,
194 };
195
196 static struct backlight_device *
sofef00_create_backlight(struct mipi_dsi_device * dsi)197 sofef00_create_backlight(struct mipi_dsi_device *dsi)
198 {
199 struct device *dev = &dsi->dev;
200 const struct backlight_properties props = {
201 .type = BACKLIGHT_PLATFORM,
202 .brightness = 512,
203 .max_brightness = 1023,
204 };
205
206 return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
207 &sofef00_panel_bl_ops, &props);
208 }
209
sofef00_panel_probe(struct mipi_dsi_device * dsi)210 static int sofef00_panel_probe(struct mipi_dsi_device *dsi)
211 {
212 struct device *dev = &dsi->dev;
213 struct sofef00_panel *ctx;
214 int ret;
215
216 ctx = devm_drm_panel_alloc(dev, struct sofef00_panel, panel,
217 &sofef00_panel_panel_funcs,
218 DRM_MODE_CONNECTOR_DSI);
219 if (IS_ERR(ctx))
220 return PTR_ERR(ctx);
221
222 ret = devm_regulator_bulk_get_const(dev,
223 ARRAY_SIZE(sofef00_supplies),
224 sofef00_supplies,
225 &ctx->supplies);
226 if (ret)
227 return dev_err_probe(dev, ret, "Failed to get regulators\n");
228
229 ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
230 if (IS_ERR(ctx->reset_gpio))
231 return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
232 "Failed to get reset-gpios\n");
233
234 ctx->dsi = dsi;
235 mipi_dsi_set_drvdata(dsi, ctx);
236
237 dsi->lanes = 4;
238 dsi->format = MIPI_DSI_FMT_RGB888;
239 dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
240 MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
241
242 ctx->panel.prepare_prev_first = true;
243
244 ctx->panel.backlight = sofef00_create_backlight(dsi);
245 if (IS_ERR(ctx->panel.backlight))
246 return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
247 "Failed to create backlight\n");
248
249 drm_panel_add(&ctx->panel);
250
251 ret = mipi_dsi_attach(dsi);
252 if (ret < 0) {
253 dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
254 drm_panel_remove(&ctx->panel);
255 return ret;
256 }
257
258 return 0;
259 }
260
sofef00_panel_remove(struct mipi_dsi_device * dsi)261 static void sofef00_panel_remove(struct mipi_dsi_device *dsi)
262 {
263 struct sofef00_panel *ctx = mipi_dsi_get_drvdata(dsi);
264 int ret;
265
266 ret = mipi_dsi_detach(dsi);
267 if (ret < 0)
268 dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
269
270 drm_panel_remove(&ctx->panel);
271 }
272
273 static const struct of_device_id sofef00_panel_of_match[] = {
274 { .compatible = "samsung,sofef00" }, /* legacy */
275 { .compatible = "samsung,sofef00-ams628nw01" },
276 { /* sentinel */ }
277 };
278 MODULE_DEVICE_TABLE(of, sofef00_panel_of_match);
279
280 static struct mipi_dsi_driver sofef00_panel_driver = {
281 .probe = sofef00_panel_probe,
282 .remove = sofef00_panel_remove,
283 .driver = {
284 .name = "panel-samsung-sofef00",
285 .of_match_table = sofef00_panel_of_match,
286 },
287 };
288
289 module_mipi_dsi_driver(sofef00_panel_driver);
290
291 MODULE_AUTHOR("Casey Connolly <casey.connolly@linaro.org>");
292 MODULE_DESCRIPTION("DRM driver for Samsung SOFEF00 DDIC");
293 MODULE_LICENSE("GPL v2");
294