Support Innolux P079ZCA 7.85" 768x1024 TFT LCD panel, it is a MIPI DSI panel.

Signed-off-by: Chris Zhong zyw@rock-chips.com ---

Changes in v2: - add some error check - always use Low power mode to send commend - add comments for all the sleep - use DRM_DEV_ERROR instead of dev_err

drivers/gpu/drm/panel/Kconfig | 11 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-innolux-p079zca.c | 344 ++++++++++++++++++++++++++ 3 files changed, 356 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-innolux-p079zca.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 62aba97..99dd010 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -18,6 +18,17 @@ config DRM_PANEL_SIMPLE that it can be automatically turned off when the panel goes into a low power state.

+config DRM_PANEL_INNOLUX_P079ZCA + tristate "Innolux P079ZCA panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y here if you want to enable support for Innolux P079ZCA + TFT-LCD modules. The panel has a 1024x768 resolution and uses + 24 bit RGB per pixel. It provides a MIPI DSI interface to + the host and has a built-in LED backlight. + config DRM_PANEL_JDI_LT070ME05000 tristate "JDI LT070ME05000 WUXGA DSI panel" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index a5c7ec0..bda2aa4 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o +obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c new file mode 100644 index 0000000..b8c34e0 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-innolux-p079zca.c @@ -0,0 +1,344 @@ +/* + * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/backlight.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.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> + +#include <video/mipi_display.h> + +struct innolux_panel { + struct drm_panel base; + struct mipi_dsi_device *link; + + struct backlight_device *backlight; + struct regulator *supply; + struct gpio_desc *enable_gpio; + + bool prepared; + bool enabled; +}; + +static inline struct innolux_panel *to_innolux_panel(struct drm_panel *panel) +{ + return container_of(panel, struct innolux_panel, base); +} + +static int innolux_panel_disable(struct drm_panel *panel) +{ + struct innolux_panel *innolux = to_innolux_panel(panel); + int err; + + if (!innolux->enabled) + return 0; + + if (innolux->backlight) { + innolux->backlight->props.power = FB_BLANK_POWERDOWN; + backlight_update_status(innolux->backlight); + } + + err = mipi_dsi_dcs_set_display_off(innolux->link); + if (err < 0) + DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n", + err); + + innolux->enabled = false; + + return 0; +} + +static int innolux_panel_unprepare(struct drm_panel *panel) +{ + struct innolux_panel *innolux = to_innolux_panel(panel); + int err; + + if (!innolux->prepared) + return 0; + + err = mipi_dsi_dcs_enter_sleep_mode(innolux->link); + if (err < 0) { + DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n", + err); + return err; + } + + gpiod_set_value_cansleep(innolux->enable_gpio, 0); + + /* T8: 80ms - 1000ms */ + msleep(80); + + err = regulator_disable(innolux->supply); + if (err < 0) + return err; + + innolux->prepared = false; + + return 0; +} + +static int innolux_panel_prepare(struct drm_panel *panel) +{ + struct innolux_panel *innolux = to_innolux_panel(panel); + int err, ret; + + if (innolux->prepared) + return 0; + + gpiod_set_value_cansleep(innolux->enable_gpio, 0); + + err = regulator_enable(innolux->supply); + if (err < 0) + return err; + + /* T2: 15ms - 1000ms */ + usleep_range(15000, 16000); + + gpiod_set_value_cansleep(innolux->enable_gpio, 1); + + /* T4: 15ms - 1000ms */ + usleep_range(15000, 16000); + + err = mipi_dsi_dcs_exit_sleep_mode(innolux->link); + if (err < 0) { + DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n", + err); + goto poweroff; + } + + /* T6: 120ms - 1000ms*/ + msleep(120); + + err = mipi_dsi_dcs_set_display_on(innolux->link); + if (err < 0) { + DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n", + err); + goto poweroff; + } + + /* T7: 5ms */ + usleep_range(5000, 6000); + + innolux->prepared = true; + + return 0; + +poweroff: + ret = regulator_disable(innolux->supply); + if (ret) + return ret; + + gpiod_set_value_cansleep(innolux->enable_gpio, 0); + return err; +} + +static int innolux_panel_enable(struct drm_panel *panel) +{ + struct innolux_panel *innolux = to_innolux_panel(panel); + int ret; + + if (innolux->enabled) + return 0; + + if (innolux->backlight) { + innolux->backlight->props.power = FB_BLANK_UNBLANK; + ret = backlight_update_status(innolux->backlight); + if (ret) { + DRM_DEV_ERROR(panel->drm->dev, + "Failed to enable backlight %d\n", ret); + return ret; + } + } + + innolux->enabled = true; + + return 0; +} + +static const struct drm_display_mode default_mode = { + .clock = 56900, + .hdisplay = 768, + .hsync_start = 768 + 40, + .hsync_end = 768 + 40 + 40, + .htotal = 768 + 40 + 40 + 40, + .vdisplay = 1024, + .vsync_start = 1024 + 20, + .vsync_end = 1024 + 20 + 4, + .vtotal = 1024 + 20 + 4 + 20, + .vrefresh = 60, +}; + +static int innolux_panel_get_modes(struct drm_panel *panel) +{ + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(panel->drm, &default_mode); + if (!mode) { + DRM_DEV_ERROR(panel->drm->dev, "failed to add mode %ux%ux@%u\n", + default_mode.hdisplay, default_mode.vdisplay, + default_mode.vrefresh); + return -ENOMEM; + } + + drm_mode_set_name(mode); + + drm_mode_probed_add(panel->connector, mode); + + panel->connector->display_info.width_mm = 120; + panel->connector->display_info.height_mm = 160; + + return 1; +} + +static const struct drm_panel_funcs innolux_panel_funcs = { + .disable = innolux_panel_disable, + .unprepare = innolux_panel_unprepare, + .prepare = innolux_panel_prepare, + .enable = innolux_panel_enable, + .get_modes = innolux_panel_get_modes, +}; + +static const struct of_device_id innolux_of_match[] = { + { .compatible = "innolux,p079zca", }, + { } +}; +MODULE_DEVICE_TABLE(of, innolux_of_match); + +static int innolux_panel_add(struct innolux_panel *innolux) +{ + struct device *dev = &innolux->link->dev; + struct device_node *np; + int err; + + innolux->supply = devm_regulator_get(dev, "power"); + if (IS_ERR(innolux->supply)) + return PTR_ERR(innolux->supply); + + innolux->enable_gpio = devm_gpiod_get_optional(dev, "enable", + GPIOD_OUT_HIGH); + if (IS_ERR(innolux->enable_gpio)) { + err = PTR_ERR(innolux->enable_gpio); + dev_dbg(dev, "failed to get enable gpio: %d\n", err); + innolux->enable_gpio = NULL; + } + + np = of_parse_phandle(dev->of_node, "backlight", 0); + if (np) { + innolux->backlight = of_find_backlight_by_node(np); + of_node_put(np); + + if (!innolux->backlight) + return -EPROBE_DEFER; + } + + drm_panel_init(&innolux->base); + innolux->base.funcs = &innolux_panel_funcs; + innolux->base.dev = &innolux->link->dev; + + err = drm_panel_add(&innolux->base); + if (err < 0) + goto put_backlight; + + return 0; + +put_backlight: + if (innolux->backlight) + put_device(&innolux->backlight->dev); + + return err; +} + +static void innolux_panel_del(struct innolux_panel *innolux) +{ + if (innolux->base.dev) + drm_panel_remove(&innolux->base); + + if (innolux->backlight) + put_device(&innolux->backlight->dev); +} + +static int innolux_panel_probe(struct mipi_dsi_device *dsi) +{ + struct innolux_panel *innolux; + int err; + + dsi->lanes = 4; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | + MIPI_DSI_MODE_LPM; + + innolux = devm_kzalloc(&dsi->dev, sizeof(*innolux), GFP_KERNEL); + if (!innolux) + return -ENOMEM; + + mipi_dsi_set_drvdata(dsi, innolux); + + innolux->link = dsi; + + err = innolux_panel_add(innolux); + if (err < 0) + return err; + + err = mipi_dsi_attach(dsi); + return err; +} + +static int innolux_panel_remove(struct mipi_dsi_device *dsi) +{ + struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi); + int err; + + err = innolux_panel_unprepare(&innolux->base); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n", + err); + + err = innolux_panel_disable(&innolux->base); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err); + + err = mipi_dsi_detach(dsi); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n", + err); + + drm_panel_detach(&innolux->base); + innolux_panel_del(innolux); + + return 0; +} + +static void innolux_panel_shutdown(struct mipi_dsi_device *dsi) +{ + struct innolux_panel *innolux = mipi_dsi_get_drvdata(dsi); + + innolux_panel_unprepare(&innolux->base); + innolux_panel_disable(&innolux->base); +} + +static struct mipi_dsi_driver innolux_panel_driver = { + .driver = { + .name = "panel-innolux-p079zca", + .of_match_table = innolux_of_match, + }, + .probe = innolux_panel_probe, + .remove = innolux_panel_remove, + .shutdown = innolux_panel_shutdown, +}; +module_mipi_dsi_driver(innolux_panel_driver); + +MODULE_AUTHOR("Chris Zhong zyw@rock-chips.com"); +MODULE_DESCRIPTION("Innolux P079ZCA panel driver"); +MODULE_LICENSE("GPL v2");