treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / gpu / drm / panel / panel-sharp-ls043t1le01.c
blobce586c6d70c769c72e345b607fef9bd281bd2114
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>
7 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
8 */
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>
16 #include <video/mipi_display.h>
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>
23 struct sharp_nt_panel {
24 struct drm_panel base;
25 struct mipi_dsi_device *dsi;
27 struct regulator *supply;
28 struct gpio_desc *reset_gpio;
30 bool prepared;
31 bool enabled;
33 const struct drm_display_mode *mode;
36 static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
38 return container_of(panel, struct sharp_nt_panel, base);
41 static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
43 struct mipi_dsi_device *dsi = sharp_nt->dsi;
44 int ret;
46 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
48 ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
49 if (ret < 0)
50 return ret;
52 msleep(120);
54 /* Novatek two-lane operation */
55 ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
56 if (ret < 0)
57 return ret;
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;
65 return 0;
68 static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
70 struct mipi_dsi_device *dsi = sharp_nt->dsi;
71 int ret;
73 dsi->mode_flags |= MIPI_DSI_MODE_LPM;
75 ret = mipi_dsi_dcs_set_display_on(dsi);
76 if (ret < 0)
77 return ret;
79 return 0;
82 static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
84 struct mipi_dsi_device *dsi = sharp_nt->dsi;
85 int ret;
87 dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
89 ret = mipi_dsi_dcs_set_display_off(dsi);
90 if (ret < 0)
91 return ret;
93 ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
94 if (ret < 0)
95 return ret;
97 return 0;
101 static int sharp_nt_panel_disable(struct drm_panel *panel)
103 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
105 if (!sharp_nt->enabled)
106 return 0;
108 sharp_nt->enabled = false;
110 return 0;
113 static int sharp_nt_panel_unprepare(struct drm_panel *panel)
115 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
116 int ret;
118 if (!sharp_nt->prepared)
119 return 0;
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;
127 regulator_disable(sharp_nt->supply);
128 if (sharp_nt->reset_gpio)
129 gpiod_set_value(sharp_nt->reset_gpio, 0);
131 sharp_nt->prepared = false;
133 return 0;
136 static int sharp_nt_panel_prepare(struct drm_panel *panel)
138 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
139 int ret;
141 if (sharp_nt->prepared)
142 return 0;
144 ret = regulator_enable(sharp_nt->supply);
145 if (ret < 0)
146 return ret;
148 msleep(20);
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);
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;
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;
171 sharp_nt->prepared = true;
173 return 0;
175 poweroff:
176 regulator_disable(sharp_nt->supply);
177 if (sharp_nt->reset_gpio)
178 gpiod_set_value(sharp_nt->reset_gpio, 0);
179 return ret;
182 static int sharp_nt_panel_enable(struct drm_panel *panel)
184 struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
186 if (sharp_nt->enabled)
187 return 0;
189 sharp_nt->enabled = true;
191 return 0;
194 static 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 .vrefresh = 60,
207 static int sharp_nt_panel_get_modes(struct drm_panel *panel,
208 struct drm_connector *connector)
210 struct drm_display_mode *mode;
212 mode = drm_mode_duplicate(connector->dev, &default_mode);
213 if (!mode) {
214 dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
215 default_mode.hdisplay, default_mode.vdisplay,
216 default_mode.vrefresh);
217 return -ENOMEM;
220 drm_mode_set_name(mode);
222 drm_mode_probed_add(connector, mode);
224 connector->display_info.width_mm = 54;
225 connector->display_info.height_mm = 95;
227 return 1;
230 static const struct drm_panel_funcs sharp_nt_panel_funcs = {
231 .disable = sharp_nt_panel_disable,
232 .unprepare = sharp_nt_panel_unprepare,
233 .prepare = sharp_nt_panel_prepare,
234 .enable = sharp_nt_panel_enable,
235 .get_modes = sharp_nt_panel_get_modes,
238 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
240 struct device *dev = &sharp_nt->dsi->dev;
241 int ret;
243 sharp_nt->mode = &default_mode;
245 sharp_nt->supply = devm_regulator_get(dev, "avdd");
246 if (IS_ERR(sharp_nt->supply))
247 return PTR_ERR(sharp_nt->supply);
249 sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
250 if (IS_ERR(sharp_nt->reset_gpio)) {
251 dev_err(dev, "cannot get reset-gpios %ld\n",
252 PTR_ERR(sharp_nt->reset_gpio));
253 sharp_nt->reset_gpio = NULL;
254 } else {
255 gpiod_set_value(sharp_nt->reset_gpio, 0);
258 drm_panel_init(&sharp_nt->base, &sharp_nt->dsi->dev,
259 &sharp_nt_panel_funcs, DRM_MODE_CONNECTOR_DSI);
261 ret = drm_panel_of_backlight(&sharp_nt->base);
262 if (ret)
263 return ret;
265 return drm_panel_add(&sharp_nt->base);
268 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
270 if (sharp_nt->base.dev)
271 drm_panel_remove(&sharp_nt->base);
274 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
276 struct sharp_nt_panel *sharp_nt;
277 int ret;
279 dsi->lanes = 2;
280 dsi->format = MIPI_DSI_FMT_RGB888;
281 dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
282 MIPI_DSI_MODE_VIDEO_HSE |
283 MIPI_DSI_CLOCK_NON_CONTINUOUS |
284 MIPI_DSI_MODE_EOT_PACKET;
286 sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
287 if (!sharp_nt)
288 return -ENOMEM;
290 mipi_dsi_set_drvdata(dsi, sharp_nt);
292 sharp_nt->dsi = dsi;
294 ret = sharp_nt_panel_add(sharp_nt);
295 if (ret < 0)
296 return ret;
298 return mipi_dsi_attach(dsi);
301 static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
303 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
304 int ret;
306 ret = drm_panel_disable(&sharp_nt->base);
307 if (ret < 0)
308 dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
310 ret = mipi_dsi_detach(dsi);
311 if (ret < 0)
312 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
314 sharp_nt_panel_del(sharp_nt);
316 return 0;
319 static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
321 struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
323 drm_panel_disable(&sharp_nt->base);
326 static const struct of_device_id sharp_nt_of_match[] = {
327 { .compatible = "sharp,ls043t1le01-qhd", },
330 MODULE_DEVICE_TABLE(of, sharp_nt_of_match);
332 static struct mipi_dsi_driver sharp_nt_panel_driver = {
333 .driver = {
334 .name = "panel-sharp-ls043t1le01-qhd",
335 .of_match_table = sharp_nt_of_match,
337 .probe = sharp_nt_panel_probe,
338 .remove = sharp_nt_panel_remove,
339 .shutdown = sharp_nt_panel_shutdown,
341 module_mipi_dsi_driver(sharp_nt_panel_driver);
343 MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
344 MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
345 MODULE_LICENSE("GPL v2");