panel-samsung-sofef00.c

  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
 21struct 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
 28static const struct regulator_bulk_data sofef00_supplies[] = {
 29	{ .supply = "vddio" },
 30	{ .supply = "vci" },
 31	{ .supply = "poc" },
 32};
 33
 34static inline
 35struct 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
 45static 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
 55static 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
 80static 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
 90static 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
104static 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
125static 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
134static 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
143static 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
162static 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
167static 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
175static 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
192static const struct backlight_ops sofef00_panel_bl_ops = {
193	.update_status = sofef00_panel_bl_update_status,
194};
195
196static struct backlight_device *
197sofef00_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
210static 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
261static 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
273static const struct of_device_id sofef00_panel_of_match[] = {
274	{ .compatible = "samsung,sofef00" }, /* legacy */
275	{ .compatible = "samsung,sofef00-ams628nw01" },
276	{ /* sentinel */ }
277};
278MODULE_DEVICE_TABLE(of, sofef00_panel_of_match);
279
280static 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
289module_mipi_dsi_driver(sofef00_panel_driver);
290
291MODULE_AUTHOR("Casey Connolly <casey.connolly@linaro.org>");
292MODULE_DESCRIPTION("DRM driver for Samsung SOFEF00 DDIC");
293MODULE_LICENSE("GPL v2");