diff options
Diffstat (limited to 'drivers/gpu/drm/panel/panel-simple.c')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-simple.c | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c new file mode 100644 index 000000000000..59d52ca2c67f --- /dev/null +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -0,0 +1,548 @@ +/* + * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sub license, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include <linux/backlight.h> +#include <linux/gpio.h> +#include <linux/module.h> +#include <linux/of_gpio.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_panel.h> + +struct panel_desc { + const struct drm_display_mode *modes; + unsigned int num_modes; + + struct { + unsigned int width; + unsigned int height; + } size; +}; + +/* TODO: convert to gpiod_*() API once it's been merged */ +#define GPIO_ACTIVE_LOW (1 << 0) + +struct panel_simple { + struct drm_panel base; + bool enabled; + + const struct panel_desc *desc; + + struct backlight_device *backlight; + struct regulator *supply; + struct i2c_adapter *ddc; + + unsigned long enable_gpio_flags; + int enable_gpio; +}; + +static inline struct panel_simple *to_panel_simple(struct drm_panel *panel) +{ + return container_of(panel, struct panel_simple, base); +} + +static int panel_simple_get_fixed_modes(struct panel_simple *panel) +{ + struct drm_connector *connector = panel->base.connector; + struct drm_device *drm = panel->base.drm; + struct drm_display_mode *mode; + unsigned int i, num = 0; + + if (!panel->desc) + return 0; + + for (i = 0; i < panel->desc->num_modes; i++) { + const struct drm_display_mode *m = &panel->desc->modes[i]; + + mode = drm_mode_duplicate(drm, m); + if (!mode) { + dev_err(drm->dev, "failed to add mode %ux%u@%u\n", + m->hdisplay, m->vdisplay, m->vrefresh); + continue; + } + + drm_mode_set_name(mode); + + drm_mode_probed_add(connector, mode); + num++; + } + + connector->display_info.width_mm = panel->desc->size.width; + connector->display_info.height_mm = panel->desc->size.height; + + return num; +} + +static int panel_simple_disable(struct drm_panel *panel) +{ + struct panel_simple *p = to_panel_simple(panel); + + if (!p->enabled) + return 0; + + if (p->backlight) { + p->backlight->props.power = FB_BLANK_POWERDOWN; + backlight_update_status(p->backlight); + } + + if (gpio_is_valid(p->enable_gpio)) { + if (p->enable_gpio_flags & GPIO_ACTIVE_LOW) + gpio_set_value(p->enable_gpio, 1); + else + gpio_set_value(p->enable_gpio, 0); + } + + regulator_disable(p->supply); + p->enabled = false; + + return 0; +} + +static int panel_simple_enable(struct drm_panel *panel) +{ + struct panel_simple *p = to_panel_simple(panel); + int err; + + if (p->enabled) + return 0; + + err = regulator_enable(p->supply); + if (err < 0) { + dev_err(panel->dev, "failed to enable supply: %d\n", err); + return err; + } + + if (gpio_is_valid(p->enable_gpio)) { + if (p->enable_gpio_flags & GPIO_ACTIVE_LOW) + gpio_set_value(p->enable_gpio, 0); + else + gpio_set_value(p->enable_gpio, 1); + } + + if (p->backlight) { + p->backlight->props.power = FB_BLANK_UNBLANK; + backlight_update_status(p->backlight); + } + + p->enabled = true; + + return 0; +} + +static int panel_simple_get_modes(struct drm_panel *panel) +{ + struct panel_simple *p = to_panel_simple(panel); + int num = 0; + + /* probe EDID if a DDC bus is available */ + if (p->ddc) { + struct edid *edid = drm_get_edid(panel->connector, p->ddc); + drm_mode_connector_update_edid_property(panel->connector, edid); + if (edid) { + num += drm_add_edid_modes(panel->connector, edid); + kfree(edid); + } + } + + /* add hard-coded panel modes */ + num += panel_simple_get_fixed_modes(p); + + return num; +} + +static const struct drm_panel_funcs panel_simple_funcs = { + .disable = panel_simple_disable, + .enable = panel_simple_enable, + .get_modes = panel_simple_get_modes, +}; + +static int panel_simple_probe(struct device *dev, const struct panel_desc *desc) +{ + struct device_node *backlight, *ddc; + struct panel_simple *panel; + enum of_gpio_flags flags; + int err; + + panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL); + if (!panel) + return -ENOMEM; + + panel->enabled = false; + panel->desc = desc; + + panel->supply = devm_regulator_get(dev, "power"); + if (IS_ERR(panel->supply)) + return PTR_ERR(panel->supply); + + panel->enable_gpio = of_get_named_gpio_flags(dev->of_node, + "enable-gpios", 0, + &flags); + if (gpio_is_valid(panel->enable_gpio)) { + unsigned int value; + + if (flags & OF_GPIO_ACTIVE_LOW) + panel->enable_gpio_flags |= GPIO_ACTIVE_LOW; + + err = gpio_request(panel->enable_gpio, "enable"); + if (err < 0) { + dev_err(dev, "failed to request GPIO#%u: %d\n", + panel->enable_gpio, err); + return err; + } + + value = (panel->enable_gpio_flags & GPIO_ACTIVE_LOW) != 0; + + err = gpio_direction_output(panel->enable_gpio, value); + if (err < 0) { + dev_err(dev, "failed to setup GPIO%u: %d\n", + panel->enable_gpio, err); + goto free_gpio; + } + } + + backlight = of_parse_phandle(dev->of_node, "backlight", 0); + if (backlight) { + panel->backlight = of_find_backlight_by_node(backlight); + of_node_put(backlight); + + if (!panel->backlight) { + err = -EPROBE_DEFER; + goto free_gpio; + } + } + + ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0); + if (ddc) { + panel->ddc = of_find_i2c_adapter_by_node(ddc); + of_node_put(ddc); + + if (!panel->ddc) { + err = -EPROBE_DEFER; + goto free_backlight; + } + } + + drm_panel_init(&panel->base); + panel->base.dev = dev; + panel->base.funcs = &panel_simple_funcs; + + err = drm_panel_add(&panel->base); + if (err < 0) + goto free_ddc; + + dev_set_drvdata(dev, panel); + + return 0; + +free_ddc: + if (panel->ddc) + put_device(&panel->ddc->dev); +free_backlight: + if (panel->backlight) + put_device(&panel->backlight->dev); +free_gpio: + if (gpio_is_valid(panel->enable_gpio)) + gpio_free(panel->enable_gpio); + + return err; +} + +static int panel_simple_remove(struct device *dev) +{ + struct panel_simple *panel = dev_get_drvdata(dev); + + drm_panel_detach(&panel->base); + drm_panel_remove(&panel->base); + + panel_simple_disable(&panel->base); + + if (panel->ddc) + put_device(&panel->ddc->dev); + + if (panel->backlight) + put_device(&panel->backlight->dev); + + if (gpio_is_valid(panel->enable_gpio)) + gpio_free(panel->enable_gpio); + + regulator_disable(panel->supply); + + return 0; +} + +static const struct drm_display_mode auo_b101aw03_mode = { + .clock = 51450, + .hdisplay = 1024, + .hsync_start = 1024 + 156, + .hsync_end = 1024 + 156 + 8, + .htotal = 1024 + 156 + 8 + 156, + .vdisplay = 600, + .vsync_start = 600 + 16, + .vsync_end = 600 + 16 + 6, + .vtotal = 600 + 16 + 6 + 16, + .vrefresh = 60, +}; + +static const struct panel_desc auo_b101aw03 = { + .modes = &auo_b101aw03_mode, + .num_modes = 1, + .size = { + .width = 223, + .height = 125, + }, +}; + +static const struct drm_display_mode chunghwa_claa101wa01a_mode = { + .clock = 72070, + .hdisplay = 1366, + .hsync_start = 1366 + 58, + .hsync_end = 1366 + 58 + 58, + .htotal = 1366 + 58 + 58 + 58, + .vdisplay = 768, + .vsync_start = 768 + 4, + .vsync_end = 768 + 4 + 4, + .vtotal = 768 + 4 + 4 + 4, + .vrefresh = 60, +}; + +static const struct panel_desc chunghwa_claa101wa01a = { + .modes = &chunghwa_claa101wa01a_mode, + .num_modes = 1, + .size = { + .width = 220, + .height = 120, + }, +}; + +static const struct drm_display_mode chunghwa_claa101wb01_mode = { + .clock = 69300, + .hdisplay = 1366, + .hsync_start = 1366 + 48, + .hsync_end = 1366 + 48 + 32, + .htotal = 1366 + 48 + 32 + 20, + .vdisplay = 768, + .vsync_start = 768 + 16, + .vsync_end = 768 + 16 + 8, + .vtotal = 768 + 16 + 8 + 16, + .vrefresh = 60, +}; + +static const struct panel_desc chunghwa_claa101wb01 = { + .modes = &chunghwa_claa101wb01_mode, + .num_modes = 1, + .size = { + .width = 223, + .height = 125, + }, +}; + +static const struct drm_display_mode samsung_ltn101nt05_mode = { + .clock = 54030, + .hdisplay = 1024, + .hsync_start = 1024 + 24, + .hsync_end = 1024 + 24 + 136, + .htotal = 1024 + 24 + 136 + 160, + .vdisplay = 600, + .vsync_start = 600 + 3, + .vsync_end = 600 + 3 + 6, + .vtotal = 600 + 3 + 6 + 61, + .vrefresh = 60, +}; + +static const struct panel_desc samsung_ltn101nt05 = { + .modes = &samsung_ltn101nt05_mode, + .num_modes = 1, + .size = { + .width = 1024, + .height = 600, + }, +}; + +static const struct of_device_id platform_of_match[] = { + { + .compatible = "auo,b101aw03", + .data = &auo_b101aw03, + }, { + .compatible = "chunghwa,claa101wa01a", + .data = &chunghwa_claa101wa01a + }, { + .compatible = "chunghwa,claa101wb01", + .data = &chunghwa_claa101wb01 + }, { + .compatible = "samsung,ltn101nt05", + .data = &samsung_ltn101nt05, + }, { + .compatible = "simple-panel", + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, platform_of_match); + +static int panel_simple_platform_probe(struct platform_device *pdev) +{ + const struct of_device_id *id; + + id = of_match_node(platform_of_match, pdev->dev.of_node); + if (!id) + return -ENODEV; + + return panel_simple_probe(&pdev->dev, id->data); +} + +static int panel_simple_platform_remove(struct platform_device *pdev) +{ + return panel_simple_remove(&pdev->dev); +} + +static struct platform_driver panel_simple_platform_driver = { + .driver = { + .name = "panel-simple", + .owner = THIS_MODULE, + .of_match_table = platform_of_match, + }, + .probe = panel_simple_platform_probe, + .remove = panel_simple_platform_remove, +}; + +struct panel_desc_dsi { + struct panel_desc desc; + + enum mipi_dsi_pixel_format format; + unsigned int lanes; +}; + +static const struct drm_display_mode panasonic_vvx10f004b00_mode = { + .clock = 157200, + .hdisplay = 1920, + .hsync_start = 1920 + 154, + .hsync_end = 1920 + 154 + 16, + .htotal = 1920 + 154 + 16 + 32, + .vdisplay = 1200, + .vsync_start = 1200 + 17, + .vsync_end = 1200 + 17 + 2, + .vtotal = 1200 + 17 + 2 + 16, + .vrefresh = 60, +}; + +static const struct panel_desc_dsi panasonic_vvx10f004b00 = { + .desc = { + .modes = &panasonic_vvx10f004b00_mode, + .num_modes = 1, + .size = { + .width = 217, + .height = 136, + }, + }, + .format = MIPI_DSI_FMT_RGB888, + .lanes = 4, +}; + +static const struct of_device_id dsi_of_match[] = { + { + .compatible = "panasonic,vvx10f004b00", + .data = &panasonic_vvx10f004b00 + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, dsi_of_match); + +static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi) +{ + const struct panel_desc_dsi *desc; + const struct of_device_id *id; + int err; + + id = of_match_node(dsi_of_match, dsi->dev.of_node); + if (!id) + return -ENODEV; + + desc = id->data; + + err = panel_simple_probe(&dsi->dev, &desc->desc); + if (err < 0) + return err; + + dsi->format = desc->format; + dsi->lanes = desc->lanes; + + return mipi_dsi_attach(dsi); +} + +static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi) +{ + int err; + + err = mipi_dsi_detach(dsi); + if (err < 0) + dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err); + + return panel_simple_remove(&dsi->dev); +} + +static struct mipi_dsi_driver panel_simple_dsi_driver = { + .driver = { + .name = "panel-simple-dsi", + .owner = THIS_MODULE, + .of_match_table = dsi_of_match, + }, + .probe = panel_simple_dsi_probe, + .remove = panel_simple_dsi_remove, +}; + +static int __init panel_simple_init(void) +{ + int err; + + err = platform_driver_register(&panel_simple_platform_driver); + if (err < 0) + return err; + + if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) { + err = mipi_dsi_driver_register(&panel_simple_dsi_driver); + if (err < 0) + return err; + } + + return 0; +} +module_init(panel_simple_init); + +static void __exit panel_simple_exit(void) +{ + if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) + mipi_dsi_driver_unregister(&panel_simple_dsi_driver); + + platform_driver_unregister(&panel_simple_platform_driver); +} +module_exit(panel_simple_exit); + +MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); +MODULE_DESCRIPTION("DRM Driver for Simple Panels"); +MODULE_LICENSE("GPL and additional rights"); 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