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	int ret;
 40
 41	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 42
 43	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
 44	if (ret < 0)
 45		return ret;
 46
 47	msleep(120);
 48
 49	/* Novatek two-lane operation */
 50	ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
 51	if (ret < 0)
 52		return ret;
 53
 54	/* Set both MCU and RGB I/F to 24bpp */
 55	ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
 56					(MIPI_DCS_PIXEL_FMT_24BIT << 4));
 57	if (ret < 0)
 58		return ret;
 59
 60	return 0;
 61}
 62
 63static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
 64{
 65	struct mipi_dsi_device *dsi = sharp_nt->dsi;
 66	int ret;
 67
 68	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 69
 70	ret = mipi_dsi_dcs_set_display_on(dsi);
 71	if (ret < 0)
 72		return ret;
 73
 74	return 0;
 75}
 76
 77static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
 78{
 79	struct mipi_dsi_device *dsi = sharp_nt->dsi;
 80	int ret;
 81
 82	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 83
 84	ret = mipi_dsi_dcs_set_display_off(dsi);
 85	if (ret < 0)
 86		return ret;
 87
 88	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
 89	if (ret < 0)
 90		return ret;
 91
 92	return 0;
 93}
 94
 95static int sharp_nt_panel_unprepare(struct drm_panel *panel)
 96{
 97	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
 98	int ret;
 99
100	ret = sharp_nt_panel_off(sharp_nt);
101	if (ret < 0) {
102		dev_err(panel->dev, "failed to set panel off: %d\n", ret);
103		return ret;
104	}
105
106	regulator_disable(sharp_nt->supply);
107	if (sharp_nt->reset_gpio)
108		gpiod_set_value(sharp_nt->reset_gpio, 0);
109
110	return 0;
111}
112
113static int sharp_nt_panel_prepare(struct drm_panel *panel)
114{
115	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
116	int ret;
117
118	ret = regulator_enable(sharp_nt->supply);
119	if (ret < 0)
120		return ret;
121
122	msleep(20);
123
124	if (sharp_nt->reset_gpio) {
125		gpiod_set_value(sharp_nt->reset_gpio, 1);
126		msleep(1);
127		gpiod_set_value(sharp_nt->reset_gpio, 0);
128		msleep(1);
129		gpiod_set_value(sharp_nt->reset_gpio, 1);
130		msleep(10);
131	}
132
133	ret = sharp_nt_panel_init(sharp_nt);
134	if (ret < 0) {
135		dev_err(panel->dev, "failed to init panel: %d\n", ret);
136		goto poweroff;
137	}
138
139	ret = sharp_nt_panel_on(sharp_nt);
140	if (ret < 0) {
141		dev_err(panel->dev, "failed to set panel on: %d\n", ret);
142		goto poweroff;
143	}
144
145	return 0;
146
147poweroff:
148	regulator_disable(sharp_nt->supply);
149	if (sharp_nt->reset_gpio)
150		gpiod_set_value(sharp_nt->reset_gpio, 0);
151	return ret;
152}
153
154static const struct drm_display_mode default_mode = {
155	.clock = (540 + 48 + 32 + 80) * (960 + 3 + 10 + 15) * 60 / 1000,
156	.hdisplay = 540,
157	.hsync_start = 540 + 48,
158	.hsync_end = 540 + 48 + 32,
159	.htotal = 540 + 48 + 32 + 80,
160	.vdisplay = 960,
161	.vsync_start = 960 + 3,
162	.vsync_end = 960 + 3 + 10,
163	.vtotal = 960 + 3 + 10 + 15,
164};
165
166static int sharp_nt_panel_get_modes(struct drm_panel *panel,
167				    struct drm_connector *connector)
168{
169	struct drm_display_mode *mode;
170
171	mode = drm_mode_duplicate(connector->dev, &default_mode);
172	if (!mode) {
173		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
174			default_mode.hdisplay, default_mode.vdisplay,
175			drm_mode_vrefresh(&default_mode));
176		return -ENOMEM;
177	}
178
179	drm_mode_set_name(mode);
180
181	drm_mode_probed_add(connector, mode);
182
183	connector->display_info.width_mm = 54;
184	connector->display_info.height_mm = 95;
185
186	return 1;
187}
188
189static const struct drm_panel_funcs sharp_nt_panel_funcs = {
190	.unprepare = sharp_nt_panel_unprepare,
191	.prepare = sharp_nt_panel_prepare,
192	.get_modes = sharp_nt_panel_get_modes,
193};
194
195static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
196{
197	struct device *dev = &sharp_nt->dsi->dev;
198	int ret;
199
200	sharp_nt->supply = devm_regulator_get(dev, "avdd");
201	if (IS_ERR(sharp_nt->supply))
202		return PTR_ERR(sharp_nt->supply);
203
204	sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
205	if (IS_ERR(sharp_nt->reset_gpio)) {
206		dev_err(dev, "cannot get reset-gpios %ld\n",
207			PTR_ERR(sharp_nt->reset_gpio));
208		sharp_nt->reset_gpio = NULL;
209	} else {
210		gpiod_set_value(sharp_nt->reset_gpio, 0);
211	}
212
213	drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev,
214		       &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
215
216	ret = drm_panel_of_backlight(&sharp_nt->base);
217	if (ret)
218		return ret;
219
220	drm_panel_add(&sharp_nt->base);
221
222	return 0;
223}
224
225static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
226{
227	if (sharp_nt->base.dev)
228		drm_panel_remove(&sharp_nt->base);
229}
230
231static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
232{
233	struct sharp_nt_panel *sharp_nt;
234	int ret;
235
236	dsi->lanes = 2;
237	dsi->format = MIPI_DSI_FMT_RGB888;
238	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
239			MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
240			MIPI_DSI_MODE_VIDEO_HSE |
241			MIPI_DSI_CLOCK_NON_CONTINUOUS |
242			MIPI_DSI_MODE_NO_EOT_PACKET;
243
244	sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
245	if (!sharp_nt)
246		return -ENOMEM;
247
248	mipi_dsi_set_drvdata(dsi, sharp_nt);
249
250	sharp_nt->dsi = dsi;
251
252	ret = sharp_nt_panel_add(sharp_nt);
253	if (ret < 0)
254		return ret;
255
256	ret = mipi_dsi_attach(dsi);
257	if (ret < 0) {
258		sharp_nt_panel_del(sharp_nt);
259		return ret;
260	}
261
262	return 0;
263}
264
265static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
266{
267	struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
268	int ret;
269
270	ret = mipi_dsi_detach(dsi);
271	if (ret < 0)
272		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
273
274	sharp_nt_panel_del(sharp_nt);
275}
276
277static const struct of_device_id sharp_nt_of_match[] = {
278	{ .compatible = "sharp,ls043t1le01-qhd", },
279	{ }
280};
281MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
282
283static struct mipi_dsi_driver sharp_nt_panel_driver = {
284	.driver = {
285		.name = "panel-sharp-ls043t1le01-qhd",
286		.of_match_table = sharp_nt_of_match,
287	},
288	.probe = sharp_nt_panel_probe,
289	.remove = sharp_nt_panel_remove,
290};
291module_mipi_dsi_driver(sharp_nt_panel_driver);
292
293MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
294MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
295MODULE_LICENSE("GPL v2");