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	bool prepared;
 31	bool enabled;
 32
 33	const struct drm_display_mode *mode;
 34};
 35
 36static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
 37{
 38	return container_of(panel, struct sharp_nt_panel, base);
 39}
 40
 41static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
 42{
 43	struct mipi_dsi_device *dsi = sharp_nt->dsi;
 44	int ret;
 45
 46	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 47
 48	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
 49	if (ret < 0)
 50		return ret;
 51
 52	msleep(120);
 53
 54	/* Novatek two-lane operation */
 55	ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
 56	if (ret < 0)
 57		return ret;
 58
 59	/* Set both MCU and RGB I/F to 24bpp */
 60	ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
 61					(MIPI_DCS_PIXEL_FMT_24BIT << 4));
 62	if (ret < 0)
 63		return ret;
 64
 65	return 0;
 66}
 67
 68static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
 69{
 70	struct mipi_dsi_device *dsi = sharp_nt->dsi;
 71	int ret;
 72
 73	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 74
 75	ret = mipi_dsi_dcs_set_display_on(dsi);
 76	if (ret < 0)
 77		return ret;
 78
 79	return 0;
 80}
 81
 82static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
 83{
 84	struct mipi_dsi_device *dsi = sharp_nt->dsi;
 85	int ret;
 86
 87	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 88
 89	ret = mipi_dsi_dcs_set_display_off(dsi);
 90	if (ret < 0)
 91		return ret;
 92
 93	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
 94	if (ret < 0)
 95		return ret;
 96
 97	return 0;
 98}
 99
100
101static int sharp_nt_panel_disable(struct drm_panel *panel)
102{
103	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
104
105	if (!sharp_nt->enabled)
106		return 0;
107
108	sharp_nt->enabled = false;
109
110	return 0;
111}
112
113static int sharp_nt_panel_unprepare(struct drm_panel *panel)
114{
115	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
116	int ret;
117
118	if (!sharp_nt->prepared)
119		return 0;
120
121	ret = sharp_nt_panel_off(sharp_nt);
122	if (ret < 0) {
123		dev_err(panel->dev, "failed to set panel off: %d\n", ret);
124		return ret;
125	}
126
127	regulator_disable(sharp_nt->supply);
128	if (sharp_nt->reset_gpio)
129		gpiod_set_value(sharp_nt->reset_gpio, 0);
130
131	sharp_nt->prepared = false;
132
133	return 0;
134}
135
136static int sharp_nt_panel_prepare(struct drm_panel *panel)
137{
138	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
139	int ret;
140
141	if (sharp_nt->prepared)
142		return 0;
143
144	ret = regulator_enable(sharp_nt->supply);
145	if (ret < 0)
146		return ret;
147
148	msleep(20);
149
150	if (sharp_nt->reset_gpio) {
151		gpiod_set_value(sharp_nt->reset_gpio, 1);
152		msleep(1);
153		gpiod_set_value(sharp_nt->reset_gpio, 0);
154		msleep(1);
155		gpiod_set_value(sharp_nt->reset_gpio, 1);
156		msleep(10);
157	}
158
159	ret = sharp_nt_panel_init(sharp_nt);
160	if (ret < 0) {
161		dev_err(panel->dev, "failed to init panel: %d\n", ret);
162		goto poweroff;
163	}
164
165	ret = sharp_nt_panel_on(sharp_nt);
166	if (ret < 0) {
167		dev_err(panel->dev, "failed to set panel on: %d\n", ret);
168		goto poweroff;
169	}
170
171	sharp_nt->prepared = true;
172
173	return 0;
174
175poweroff:
176	regulator_disable(sharp_nt->supply);
177	if (sharp_nt->reset_gpio)
178		gpiod_set_value(sharp_nt->reset_gpio, 0);
179	return ret;
180}
181
182static int sharp_nt_panel_enable(struct drm_panel *panel)
183{
184	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
185
186	if (sharp_nt->enabled)
187		return 0;
188
189	sharp_nt->enabled = true;
190
191	return 0;
192}
193
194static const struct drm_display_mode default_mode = {
195	.clock = 41118,
196	.hdisplay = 540,
197	.hsync_start = 540 + 48,
198	.hsync_end = 540 + 48 + 80,
199	.htotal = 540 + 48 + 80 + 32,
200	.vdisplay = 960,
201	.vsync_start = 960 + 3,
202	.vsync_end = 960 + 3 + 15,
203	.vtotal = 960 + 3 + 15 + 1,
204};
205
206static int sharp_nt_panel_get_modes(struct drm_panel *panel,
207				    struct drm_connector *connector)
208{
209	struct drm_display_mode *mode;
210
211	mode = drm_mode_duplicate(connector->dev, &default_mode);
212	if (!mode) {
213		dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
214			default_mode.hdisplay, default_mode.vdisplay,
215			drm_mode_vrefresh(&default_mode));
216		return -ENOMEM;
217	}
218
219	drm_mode_set_name(mode);
220
221	drm_mode_probed_add(connector, mode);
222
223	connector->display_info.width_mm = 54;
224	connector->display_info.height_mm = 95;
225
226	return 1;
227}
228
229static const struct drm_panel_funcs sharp_nt_panel_funcs = {
230	.disable = sharp_nt_panel_disable,
231	.unprepare = sharp_nt_panel_unprepare,
232	.prepare = sharp_nt_panel_prepare,
233	.enable = sharp_nt_panel_enable,
234	.get_modes = sharp_nt_panel_get_modes,
235};
236
237static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
238{
239	struct device *dev = &sharp_nt->dsi->dev;
240	int ret;
241
242	sharp_nt->mode = &default_mode;
243
244	sharp_nt->supply = devm_regulator_get(dev, "avdd");
245	if (IS_ERR(sharp_nt->supply))
246		return PTR_ERR(sharp_nt->supply);
247
248	sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
249	if (IS_ERR(sharp_nt->reset_gpio)) {
250		dev_err(dev, "cannot get reset-gpios %ld\n",
251			PTR_ERR(sharp_nt->reset_gpio));
252		sharp_nt->reset_gpio = NULL;
253	} else {
254		gpiod_set_value(sharp_nt->reset_gpio, 0);
255	}
256
257	drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev,
258		       &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
259
260	ret = drm_panel_of_backlight(&sharp_nt->base);
261	if (ret)
262		return ret;
263
264	drm_panel_add(&sharp_nt->base);
265
266	return 0;
267}
268
269static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
270{
271	if (sharp_nt->base.dev)
272		drm_panel_remove(&sharp_nt->base);
273}
274
275static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
276{
277	struct sharp_nt_panel *sharp_nt;
278	int ret;
279
280	dsi->lanes = 2;
281	dsi->format = MIPI_DSI_FMT_RGB888;
282	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
283			MIPI_DSI_MODE_VIDEO_HSE |
284			MIPI_DSI_CLOCK_NON_CONTINUOUS |
285			MIPI_DSI_MODE_NO_EOT_PACKET;
286
287	sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
288	if (!sharp_nt)
289		return -ENOMEM;
290
291	mipi_dsi_set_drvdata(dsi, sharp_nt);
292
293	sharp_nt->dsi = dsi;
294
295	ret = sharp_nt_panel_add(sharp_nt);
296	if (ret < 0)
297		return ret;
298
299	ret = mipi_dsi_attach(dsi);
300	if (ret < 0) {
301		sharp_nt_panel_del(sharp_nt);
302		return ret;
303	}
304
305	return 0;
306}
307
308static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
309{
310	struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
311	int ret;
312
313	ret = drm_panel_disable(&sharp_nt->base);
314	if (ret < 0)
315		dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
316
317	ret = mipi_dsi_detach(dsi);
318	if (ret < 0)
319		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
320
321	sharp_nt_panel_del(sharp_nt);
322}
323
324static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
325{
326	struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
327
328	drm_panel_disable(&sharp_nt->base);
329}
330
331static const struct of_device_id sharp_nt_of_match[] = {
332	{ .compatible = "sharp,ls043t1le01-qhd", },
333	{ }
334};
335MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
336
337static struct mipi_dsi_driver sharp_nt_panel_driver = {
338	.driver = {
339		.name = "panel-sharp-ls043t1le01-qhd",
340		.of_match_table = sharp_nt_of_match,
341	},
342	.probe = sharp_nt_panel_probe,
343	.remove = sharp_nt_panel_remove,
344	.shutdown = sharp_nt_panel_shutdown,
345};
346module_mipi_dsi_driver(sharp_nt_panel_driver);
347
348MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
349MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
350MODULE_LICENSE("GPL v2");