2 * Copyright (C) 2013, NVIDIA Corporation. All rights reserved.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 #include <linux/backlight.h>
25 #include <linux/gpio.h>
26 #include <linux/module.h>
27 #include <linux/of_gpio.h>
28 #include <linux/of_platform.h>
29 #include <linux/platform_device.h>
30 #include <linux/regulator/consumer.h>
33 #include <drm/drm_crtc.h>
34 #include <drm/drm_mipi_dsi.h>
35 #include <drm/drm_panel.h>
38 const struct drm_display_mode *modes;
39 unsigned int num_modes;
47 /* TODO: convert to gpiod_*() API once it's been merged */
48 #define GPIO_ACTIVE_LOW (1 << 0)
51 struct drm_panel base;
54 const struct panel_desc *desc;
56 struct backlight_device *backlight;
57 struct regulator *supply;
58 struct i2c_adapter *ddc;
60 unsigned long enable_gpio_flags;
64 static inline struct panel_simple *to_panel_simple(struct drm_panel *panel)
66 return container_of(panel, struct panel_simple, base);
69 static int panel_simple_get_fixed_modes(struct panel_simple *panel)
71 struct drm_connector *connector = panel->base.connector;
72 struct drm_device *drm = panel->base.drm;
73 struct drm_display_mode *mode;
74 unsigned int i, num = 0;
79 for (i = 0; i < panel->desc->num_modes; i++) {
80 const struct drm_display_mode *m = &panel->desc->modes[i];
82 mode = drm_mode_duplicate(drm, m);
84 dev_err(drm->dev, "failed to add mode %ux%u@%u\n",
85 m->hdisplay, m->vdisplay, m->vrefresh);
89 drm_mode_set_name(mode);
91 drm_mode_probed_add(connector, mode);
95 connector->display_info.width_mm = panel->desc->size.width;
96 connector->display_info.height_mm = panel->desc->size.height;
101 static int panel_simple_disable(struct drm_panel *panel)
103 struct panel_simple *p = to_panel_simple(panel);
109 p->backlight->props.power = FB_BLANK_POWERDOWN;
110 backlight_update_status(p->backlight);
113 if (gpio_is_valid(p->enable_gpio)) {
114 if (p->enable_gpio_flags & GPIO_ACTIVE_LOW)
115 gpio_set_value(p->enable_gpio, 1);
117 gpio_set_value(p->enable_gpio, 0);
120 regulator_disable(p->supply);
126 static int panel_simple_enable(struct drm_panel *panel)
128 struct panel_simple *p = to_panel_simple(panel);
134 err = regulator_enable(p->supply);
136 dev_err(panel->dev, "failed to enable supply: %d\n", err);
140 if (gpio_is_valid(p->enable_gpio)) {
141 if (p->enable_gpio_flags & GPIO_ACTIVE_LOW)
142 gpio_set_value(p->enable_gpio, 0);
144 gpio_set_value(p->enable_gpio, 1);
148 p->backlight->props.power = FB_BLANK_UNBLANK;
149 backlight_update_status(p->backlight);
157 static int panel_simple_get_modes(struct drm_panel *panel)
159 struct panel_simple *p = to_panel_simple(panel);
162 /* probe EDID if a DDC bus is available */
164 struct edid *edid = drm_get_edid(panel->connector, p->ddc);
166 num += drm_add_edid_modes(panel->connector, edid);
171 /* add hard-coded panel modes */
172 num += panel_simple_get_fixed_modes(p);
177 static const struct drm_panel_funcs panel_simple_funcs = {
178 .disable = panel_simple_disable,
179 .enable = panel_simple_enable,
180 .get_modes = panel_simple_get_modes,
183 static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
185 struct device_node *backlight, *ddc;
186 struct panel_simple *panel;
187 enum of_gpio_flags flags;
190 panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
194 panel->enabled = false;
197 panel->supply = devm_regulator_get(dev, "power");
198 if (IS_ERR(panel->supply))
199 return PTR_ERR(panel->supply);
201 panel->enable_gpio = of_get_named_gpio_flags(dev->of_node,
204 if (gpio_is_valid(panel->enable_gpio)) {
207 if (flags & OF_GPIO_ACTIVE_LOW)
208 panel->enable_gpio_flags |= GPIO_ACTIVE_LOW;
210 err = gpio_request(panel->enable_gpio, "enable");
212 dev_err(dev, "failed to request GPIO#%u: %d\n",
213 panel->enable_gpio, err);
217 value = (panel->enable_gpio_flags & GPIO_ACTIVE_LOW) != 0;
219 err = gpio_direction_output(panel->enable_gpio, value);
221 dev_err(dev, "failed to setup GPIO%u: %d\n",
222 panel->enable_gpio, err);
227 backlight = of_parse_phandle(dev->of_node, "backlight", 0);
229 panel->backlight = of_find_backlight_by_node(backlight);
230 of_node_put(backlight);
232 if (!panel->backlight) {
238 ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
240 panel->ddc = of_find_i2c_adapter_by_node(ddc);
249 drm_panel_init(&panel->base);
250 panel->base.dev = dev;
251 panel->base.funcs = &panel_simple_funcs;
253 err = drm_panel_add(&panel->base);
257 dev_set_drvdata(dev, panel);
263 put_device(&panel->ddc->dev);
265 if (panel->backlight)
266 put_device(&panel->backlight->dev);
268 if (gpio_is_valid(panel->enable_gpio))
269 gpio_free(panel->enable_gpio);
274 static int panel_simple_remove(struct device *dev)
276 struct panel_simple *panel = dev_get_drvdata(dev);
278 drm_panel_detach(&panel->base);
279 drm_panel_remove(&panel->base);
281 panel_simple_disable(&panel->base);
284 put_device(&panel->ddc->dev);
286 if (panel->backlight)
287 put_device(&panel->backlight->dev);
289 if (gpio_is_valid(panel->enable_gpio))
290 gpio_free(panel->enable_gpio);
292 regulator_disable(panel->supply);
297 static const struct drm_display_mode auo_b101aw03_mode = {
300 .hsync_start = 1024 + 156,
301 .hsync_end = 1024 + 156 + 8,
302 .htotal = 1024 + 156 + 8 + 156,
304 .vsync_start = 600 + 16,
305 .vsync_end = 600 + 16 + 6,
306 .vtotal = 600 + 16 + 6 + 16,
310 static const struct panel_desc auo_b101aw03 = {
311 .modes = &auo_b101aw03_mode,
319 static const struct drm_display_mode chunghwa_claa101wb01_mode = {
322 .hsync_start = 1366 + 48,
323 .hsync_end = 1366 + 48 + 32,
324 .htotal = 1366 + 48 + 32 + 20,
326 .vsync_start = 768 + 16,
327 .vsync_end = 768 + 16 + 8,
328 .vtotal = 768 + 16 + 8 + 16,
332 static const struct panel_desc chunghwa_claa101wb01 = {
333 .modes = &chunghwa_claa101wb01_mode,
341 static const struct drm_display_mode samsung_ltn101nt05_mode = {
344 .hsync_start = 1024 + 24,
345 .hsync_end = 1024 + 24 + 136,
346 .htotal = 1024 + 24 + 136 + 160,
348 .vsync_start = 600 + 3,
349 .vsync_end = 600 + 3 + 6,
350 .vtotal = 600 + 3 + 6 + 61,
354 static const struct panel_desc samsung_ltn101nt05 = {
355 .modes = &samsung_ltn101nt05_mode,
363 static const struct of_device_id platform_of_match[] = {
365 .compatible = "auo,b101aw03",
366 .data = &auo_b101aw03,
368 .compatible = "chunghwa,claa101wb01",
369 .data = &chunghwa_claa101wb01
371 .compatible = "samsung,ltn101nt05",
372 .data = &samsung_ltn101nt05,
374 .compatible = "simple-panel",
379 MODULE_DEVICE_TABLE(of, platform_of_match);
381 static int panel_simple_platform_probe(struct platform_device *pdev)
383 const struct of_device_id *id;
385 id = of_match_node(platform_of_match, pdev->dev.of_node);
389 return panel_simple_probe(&pdev->dev, id->data);
392 static int panel_simple_platform_remove(struct platform_device *pdev)
394 return panel_simple_remove(&pdev->dev);
397 static struct platform_driver panel_simple_platform_driver = {
399 .name = "panel-simple",
400 .owner = THIS_MODULE,
401 .of_match_table = platform_of_match,
403 .probe = panel_simple_platform_probe,
404 .remove = panel_simple_platform_remove,
407 struct panel_desc_dsi {
408 struct panel_desc desc;
410 enum mipi_dsi_pixel_format format;
414 static const struct drm_display_mode panasonic_vvx10f004b00_mode = {
417 .hsync_start = 1920 + 154,
418 .hsync_end = 1920 + 154 + 16,
419 .htotal = 1920 + 154 + 16 + 32,
421 .vsync_start = 1200 + 17,
422 .vsync_end = 1200 + 17 + 2,
423 .vtotal = 1200 + 17 + 2 + 16,
427 static const struct panel_desc_dsi panasonic_vvx10f004b00 = {
429 .modes = &panasonic_vvx10f004b00_mode,
436 .format = MIPI_DSI_FMT_RGB888,
440 static const struct of_device_id dsi_of_match[] = {
442 .compatible = "panasonic,vvx10f004b00",
443 .data = &panasonic_vvx10f004b00
448 MODULE_DEVICE_TABLE(of, dsi_of_match);
450 static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
452 const struct panel_desc_dsi *desc;
453 const struct of_device_id *id;
456 id = of_match_node(dsi_of_match, dsi->dev.of_node);
462 err = panel_simple_probe(&dsi->dev, &desc->desc);
466 dsi->format = desc->format;
467 dsi->lanes = desc->lanes;
469 return mipi_dsi_attach(dsi);
472 static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi)
476 err = mipi_dsi_detach(dsi);
478 dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
480 return panel_simple_remove(&dsi->dev);
483 static struct mipi_dsi_driver panel_simple_dsi_driver = {
485 .name = "panel-simple-dsi",
486 .owner = THIS_MODULE,
487 .of_match_table = dsi_of_match,
489 .probe = panel_simple_dsi_probe,
490 .remove = panel_simple_dsi_remove,
493 static int __init panel_simple_init(void)
497 err = platform_driver_register(&panel_simple_platform_driver);
501 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
502 err = mipi_dsi_driver_register(&panel_simple_dsi_driver);
509 module_init(panel_simple_init);
511 static void __exit panel_simple_exit(void)
513 if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
514 mipi_dsi_driver_unregister(&panel_simple_dsi_driver);
516 platform_driver_unregister(&panel_simple_platform_driver);
518 module_exit(panel_simple_exit);
520 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
521 MODULE_DESCRIPTION("DRM Driver for Simple Panels");
522 MODULE_LICENSE("GPL and additional rights");