panel-sharp-ls043t1le01.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2015 Red Hat
  4 * Copyright (C) 2015 Sony Mobile Communications Inc.
  5 * Author: Werner Johansson <werner.johansson@sonymobile.com>
  6 *
  7 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
  8 */
  9
 10#include <linux/delay.h>
 11#include <linux/gpio/consumer.h>
 12#include <linux/module.h>
 13#include <linux/of.h>
 14#include <linux/regulator/consumer.h>
 15
 16#include <video/mipi_display.h>
 17
 18#include <drm/drm_crtc.h>
 19#include <drm/drm_device.h>
 20#include <drm/drm_mipi_dsi.h>
 21#include <drm/drm_panel.h>
 22
 23struct sharp_nt_panel {
 24	struct drm_panel base;
 25	struct mipi_dsi_device *dsi;
 26
 27	struct regulator *supply;
 28	struct gpio_desc *reset_gpio;
 29};
 30
 31static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
 32{
 33	return container_of(panel, struct sharp_nt_panel, base);
 34}
 35
 36static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
 37{
 38	struct mipi_dsi_device *dsi = sharp_nt->dsi;
 39	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 40
 41	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 42
 43	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
 44
 45	mipi_dsi_msleep(&dsi_ctx, 120);
 46
 47	/* Novatek two-lane operation */
 48	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xae,  0x03);
 49
 50	/* Set both MCU and RGB I/F to 24bpp */
 51	mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx,
 52					    MIPI_DCS_PIXEL_FMT_24BIT |
 53					    (MIPI_DCS_PIXEL_FMT_24BIT << 4));
 54
 55	return dsi_ctx.accum_err;
 56}
 57
 58static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
 59{
 60	struct mipi_dsi_device *dsi = sharp_nt->dsi;
 61	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 62
 63	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 64
 65	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
 66
 67	return dsi_ctx.accum_err;
 68}
 69
 70static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
 71{
 72	struct mipi_dsi_device *dsi = sharp_nt->dsi;
 73	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 74
 75	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 76
 77	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
 78
 79	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
 80
 81	return dsi_ctx.accum_err;
 82}
 83
 84static int sharp_nt_panel_unprepare(struct drm_panel *panel)
 85{
 86	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 87	int ret;
 88
 89	ret = sharp_nt_panel_off(sharp_nt);
 90	if (ret < 0) {
 91		dev_err(panel->dev, "failed to set panel off: %d\n", ret);
 92		return ret;
 93	}
 94
 95	regulator_disable(sharp_nt->supply);
 96	if (sharp_nt->reset_gpio)
 97		gpiod_set_value(sharp_nt->reset_gpio, 0);
 98
 99	return 0;
100}
101
102static int sharp_nt_panel_prepare(struct drm_panel *panel)
103{
104	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
105	int ret;
106
107	ret = regulator_enable(sharp_nt->supply);
108	if (ret < 0)
109		return ret;
110
111	msleep(20);
112
113	if (sharp_nt->reset_gpio) {
114		gpiod_set_value(sharp_nt->reset_gpio, 1);
115		msleep(1);
116		gpiod_set_value(sharp_nt->reset_gpio, 0);
117		msleep(1);
118		gpiod_set_value(sharp_nt->reset_gpio, 1);
119		msleep(10);
120	}
121
122	ret = sharp_nt_panel_init(sharp_nt);
123	if (ret < 0) {
124		dev_err(panel->dev, "failed to init panel: %d\n", ret);
125		goto poweroff;
126	}
127
128	ret = sharp_nt_panel_on(sharp_nt);
129	if (ret < 0) {
130		dev_err(panel->dev, "failed to set panel on: %d\n", ret);
131		goto poweroff;
132	}
133
134	return 0;
135
136poweroff:
137	regulator_disable(sharp_nt->supply);
138	if (sharp_nt->reset_gpio)
139		gpiod_set_value(sharp_nt->reset_gpio, 0);
140	return ret;
141}
142
143static const struct drm_display_mode default_mode = {
144	.clock = (540 + 48 + 32 + 80) * (960 + 3 + 10 + 15) * 60 / 1000,
145	.hdisplay = 540,
146	.hsync_start = 540 + 48,
147	.hsync_end = 540 + 48 + 32,
148	.htotal = 540 + 48 + 32 + 80,
149	.vdisplay = 960,
150	.vsync_start = 960 + 3,
151	.vsync_end = 960 + 3 + 10,
152	.vtotal = 960 + 3 + 10 + 15,
153};
154
155static int sharp_nt_panel_get_modes(struct drm_panel *panel,
156				    struct drm_connector *connector)
157{
158	struct drm_display_mode *mode;
159
160	mode = drm_mode_duplicate(connector->dev, &default_mode);
161	if (!mode) {
162		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
163			default_mode.hdisplay, default_mode.vdisplay,
164			drm_mode_vrefresh(&default_mode));
165		return -ENOMEM;
166	}
167
168	drm_mode_set_name(mode);
169
170	drm_mode_probed_add(connector, mode);
171
172	connector->display_info.width_mm = 54;
173	connector->display_info.height_mm = 95;
174
175	return 1;
176}
177
178static const struct drm_panel_funcs sharp_nt_panel_funcs = {
179	.unprepare = sharp_nt_panel_unprepare,
180	.prepare = sharp_nt_panel_prepare,
181	.get_modes = sharp_nt_panel_get_modes,
182};
183
184static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
185{
186	struct device *dev = &sharp_nt->dsi->dev;
187	int ret;
188
189	sharp_nt->supply = devm_regulator_get(dev, "avdd");
190	if (IS_ERR(sharp_nt->supply))
191		return PTR_ERR(sharp_nt->supply);
192
193	sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
194	if (IS_ERR(sharp_nt->reset_gpio)) {
195		dev_err(dev, "cannot get reset-gpios %ld\n",
196			PTR_ERR(sharp_nt->reset_gpio));
197		sharp_nt->reset_gpio = NULL;
198	} else {
199		gpiod_set_value(sharp_nt->reset_gpio, 0);
200	}
201
202	drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev,
203		       &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
204
205	ret = drm_panel_of_backlight(&sharp_nt->base);
206	if (ret)
207		return ret;
208
209	drm_panel_add(&sharp_nt->base);
210
211	return 0;
212}
213
214static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
215{
216	if (sharp_nt->base.dev)
217		drm_panel_remove(&sharp_nt->base);
218}
219
220static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
221{
222	struct sharp_nt_panel *sharp_nt;
223	int ret;
224
225	dsi->lanes = 2;
226	dsi->format = MIPI_DSI_FMT_RGB888;
227	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
228			MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
229			MIPI_DSI_MODE_VIDEO_HSE |
230			MIPI_DSI_CLOCK_NON_CONTINUOUS |
231			MIPI_DSI_MODE_NO_EOT_PACKET;
232
233	sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
234	if (!sharp_nt)
235		return -ENOMEM;
236
237	mipi_dsi_set_drvdata(dsi, sharp_nt);
238
239	sharp_nt->dsi = dsi;
240
241	ret = sharp_nt_panel_add(sharp_nt);
242	if (ret < 0)
243		return ret;
244
245	ret = mipi_dsi_attach(dsi);
246	if (ret < 0) {
247		sharp_nt_panel_del(sharp_nt);
248		return ret;
249	}
250
251	return 0;
252}
253
254static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
255{
256	struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
257	int ret;
258
259	ret = mipi_dsi_detach(dsi);
260	if (ret < 0)
261		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
262
263	sharp_nt_panel_del(sharp_nt);
264}
265
266static const struct of_device_id sharp_nt_of_match[] = {
267	{ .compatible = "sharp,ls043t1le01-qhd", },
268	{ }
269};
270MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
271
272static struct mipi_dsi_driver sharp_nt_panel_driver = {
273	.driver = {
274		.name = "panel-sharp-ls043t1le01-qhd",
275		.of_match_table = sharp_nt_of_match,
276	},
277	.probe = sharp_nt_panel_probe,
278	.remove = sharp_nt_panel_remove,
279};
280module_mipi_dsi_driver(sharp_nt_panel_driver);
281
282MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
283MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
284MODULE_LICENSE("GPL v2");