1 // SPDX-License-Identifier: GPL-2.0
3 * NewVision NV3052C IPS LCD panel driver
5 * Copyright (C) 2020, Paul Cercueil <paul@crapouillou.net>
6 * Copyright (C) 2022, Christophe Branchereau <cbranchereau@gmail.com>
9 #include <linux/delay.h>
10 #include <linux/device.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/media-bus-format.h>
13 #include <linux/module.h>
14 #include <linux/of_device.h>
15 #include <linux/regulator/consumer.h>
16 #include <linux/spi/spi.h>
17 #include <video/mipi_display.h>
18 #include <drm/drm_mipi_dbi.h>
19 #include <drm/drm_modes.h>
20 #include <drm/drm_panel.h>
22 struct nv3052c_panel_info {
23 const struct drm_display_mode *display_modes;
24 unsigned int num_modes;
25 u16 width_mm, height_mm;
26 u32 bus_format, bus_flags;
31 struct drm_panel panel;
33 const struct nv3052c_panel_info *panel_info;
34 struct regulator *supply;
35 struct gpio_desc *reset_gpio;
43 static const struct nv3052c_reg nv3052c_panel_regs[] = {
235 static inline struct nv3052c *to_nv3052c(struct drm_panel *panel)
237 return container_of(panel, struct nv3052c, panel);
240 static int nv3052c_prepare(struct drm_panel *panel)
242 struct nv3052c *priv = to_nv3052c(panel);
243 struct mipi_dbi *dbi = &priv->dbi;
247 err = regulator_enable(priv->supply);
249 dev_err(priv->dev, "Failed to enable power supply: %d\n", err);
254 gpiod_set_value_cansleep(priv->reset_gpio, 1);
255 usleep_range(10, 1000);
256 gpiod_set_value_cansleep(priv->reset_gpio, 0);
257 usleep_range(5000, 20000);
259 for (i = 0; i < ARRAY_SIZE(nv3052c_panel_regs); i++) {
260 err = mipi_dbi_command(dbi, nv3052c_panel_regs[i].cmd,
261 nv3052c_panel_regs[i].val);
264 dev_err(priv->dev, "Unable to set register: %d\n", err);
265 goto err_disable_regulator;
269 err = mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
271 dev_err(priv->dev, "Unable to exit sleep mode: %d\n", err);
272 goto err_disable_regulator;
277 err_disable_regulator:
278 regulator_disable(priv->supply);
282 static int nv3052c_unprepare(struct drm_panel *panel)
284 struct nv3052c *priv = to_nv3052c(panel);
285 struct mipi_dbi *dbi = &priv->dbi;
288 err = mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);
290 dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);
292 gpiod_set_value_cansleep(priv->reset_gpio, 1);
293 regulator_disable(priv->supply);
298 static int nv3052c_enable(struct drm_panel *panel)
300 struct nv3052c *priv = to_nv3052c(panel);
301 struct mipi_dbi *dbi = &priv->dbi;
304 err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
306 dev_err(priv->dev, "Unable to enable display: %d\n", err);
310 if (panel->backlight) {
311 /* Wait for the picture to be ready before enabling backlight */
318 static int nv3052c_disable(struct drm_panel *panel)
320 struct nv3052c *priv = to_nv3052c(panel);
321 struct mipi_dbi *dbi = &priv->dbi;
324 err = mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
326 dev_err(priv->dev, "Unable to disable display: %d\n", err);
333 static int nv3052c_get_modes(struct drm_panel *panel,
334 struct drm_connector *connector)
336 struct nv3052c *priv = to_nv3052c(panel);
337 const struct nv3052c_panel_info *panel_info = priv->panel_info;
338 struct drm_display_mode *mode;
341 for (i = 0; i < panel_info->num_modes; i++) {
342 mode = drm_mode_duplicate(connector->dev,
343 &panel_info->display_modes[i]);
347 drm_mode_set_name(mode);
349 mode->type = DRM_MODE_TYPE_DRIVER;
350 if (panel_info->num_modes == 1)
351 mode->type |= DRM_MODE_TYPE_PREFERRED;
353 drm_mode_probed_add(connector, mode);
356 connector->display_info.bpc = 8;
357 connector->display_info.width_mm = panel_info->width_mm;
358 connector->display_info.height_mm = panel_info->height_mm;
360 drm_display_info_set_bus_formats(&connector->display_info,
361 &panel_info->bus_format, 1);
362 connector->display_info.bus_flags = panel_info->bus_flags;
364 return panel_info->num_modes;
367 static const struct drm_panel_funcs nv3052c_funcs = {
368 .prepare = nv3052c_prepare,
369 .unprepare = nv3052c_unprepare,
370 .enable = nv3052c_enable,
371 .disable = nv3052c_disable,
372 .get_modes = nv3052c_get_modes,
375 static int nv3052c_probe(struct spi_device *spi)
377 struct device *dev = &spi->dev;
378 struct nv3052c *priv;
381 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
387 priv->panel_info = of_device_get_match_data(dev);
388 if (!priv->panel_info)
391 priv->supply = devm_regulator_get(dev, "power");
392 if (IS_ERR(priv->supply))
393 return dev_err_probe(dev, PTR_ERR(priv->supply), "Failed to get power supply\n");
395 priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
396 if (IS_ERR(priv->reset_gpio))
397 return dev_err_probe(dev, PTR_ERR(priv->reset_gpio), "Failed to get reset GPIO\n");
399 err = mipi_dbi_spi_init(spi, &priv->dbi, NULL);
401 return dev_err_probe(dev, err, "MIPI DBI init failed\n");
403 priv->dbi.read_commands = NULL;
405 spi_set_drvdata(spi, priv);
407 drm_panel_init(&priv->panel, dev, &nv3052c_funcs,
408 DRM_MODE_CONNECTOR_DPI);
410 err = drm_panel_of_backlight(&priv->panel);
412 return dev_err_probe(dev, err, "Failed to attach backlight\n");
414 drm_panel_add(&priv->panel);
419 static void nv3052c_remove(struct spi_device *spi)
421 struct nv3052c *priv = spi_get_drvdata(spi);
423 drm_panel_remove(&priv->panel);
424 drm_panel_disable(&priv->panel);
425 drm_panel_unprepare(&priv->panel);
428 static const struct drm_display_mode ltk035c5444t_modes[] = {
432 .hsync_start = 640 + 96,
433 .hsync_end = 640 + 96 + 16,
434 .htotal = 640 + 96 + 16 + 48,
436 .vsync_start = 480 + 5,
437 .vsync_end = 480 + 5 + 2,
438 .vtotal = 480 + 5 + 2 + 13,
439 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
444 .hsync_start = 640 + 39,
445 .hsync_end = 640 + 39 + 2,
446 .htotal = 640 + 39 + 2 + 39,
448 .vsync_start = 480 + 5,
449 .vsync_end = 480 + 5 + 2,
450 .vtotal = 480 + 5 + 2 + 13,
451 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
455 static const struct nv3052c_panel_info ltk035c5444t_panel_info = {
456 .display_modes = ltk035c5444t_modes,
457 .num_modes = ARRAY_SIZE(ltk035c5444t_modes),
460 .bus_format = MEDIA_BUS_FMT_RGB888_1X24,
461 .bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
464 static const struct of_device_id nv3052c_of_match[] = {
465 { .compatible = "leadtek,ltk035c5444t", .data = <k035c5444t_panel_info },
468 MODULE_DEVICE_TABLE(of, nv3052c_of_match);
470 static struct spi_driver nv3052c_driver = {
473 .of_match_table = nv3052c_of_match,
475 .probe = nv3052c_probe,
476 .remove = nv3052c_remove,
478 module_spi_driver(nv3052c_driver);
480 MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
481 MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>");
482 MODULE_LICENSE("GPL v2");