Commit ee017238 authored by Werner Johansson's avatar Werner Johansson Committed by Thierry Reding
Browse files

drm/panel: Add Sharp LS043T1LE01 MIPI DSI panel 



The Sharp LS043T1LE01 is a 4.3", 540x960 TFT-LCD panel connected using
two DSI lanes. It is for example found on the Qualcomm Snapdragon 800
Dragonboard (APQ8074).

Signed-off-by: default avatarWerner Johansson <werner.johansson@sonymobile.com>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@sonymobile.com>
Reviewed-by: default avatarArchit Taneja <architt@codeaurora.org>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 6a24d9c1

drivers/gpu/drm/panel/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -61,4 +61,13 @@ config DRM_PANEL_SHARP_LQ101R1SX01 
	  To compile this driver as a module, choose M here: the module

	  will be called panel-sharp-lq101r1sx01.



config DRM_PANEL_SHARP_LS043T1LE01

	tristate "Sharp LS043T1LE01 qHD video mode 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 Sharp LS043T1LE01 qHD

	  (540x960) DSI panel as found on the Qualcomm APQ8074 Dragonboard



endmenu

drivers/gpu/drm/panel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -4,3 +4,4 @@ obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o 
obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o

obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o

obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o

obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o

drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c

0 → 100644
+387 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2015 Red Hat

 * Copyright (C) 2015 Sony Mobile Communications Inc.

 * Author: Werner Johansson <werner.johansson@sonymobile.com>

 *

 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 as published by

 * the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program.  If not, see <http://www.gnu.org/licenses/>.

 */



#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 sharp_nt_panel {

	struct drm_panel base;

	struct mipi_dsi_device *dsi;



	struct backlight_device *backlight;

	struct regulator *supply;

	struct gpio_desc *reset_gpio;



	bool prepared;

	bool enabled;



	const struct drm_display_mode *mode;

};



static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)

{

	return container_of(panel, struct sharp_nt_panel, base);

}



static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)

{

	struct mipi_dsi_device *dsi = sharp_nt->dsi;

	int ret;



	dsi->mode_flags |= MIPI_DSI_MODE_LPM;



	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);

	if (ret < 0)

		return ret;



	msleep(120);



	/* Novatek two-lane operation */

	ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);

	if (ret < 0)

		return ret;



	/* Set both MCU and RGB I/F to 24bpp */

	ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |

					(MIPI_DCS_PIXEL_FMT_24BIT << 4));

	if (ret < 0)

		return ret;



	return 0;

}



static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)

{

	struct mipi_dsi_device *dsi = sharp_nt->dsi;

	int ret;



	dsi->mode_flags |= MIPI_DSI_MODE_LPM;



	ret = mipi_dsi_dcs_set_display_on(dsi);

	if (ret < 0)

		return ret;



	return 0;

}



static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)

{

	struct mipi_dsi_device *dsi = sharp_nt->dsi;

	int ret;



	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;



	ret = mipi_dsi_dcs_set_display_off(dsi);

	if (ret < 0)

		return ret;



	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);

	if (ret < 0)

		return ret;



	return 0;

}





static int sharp_nt_panel_disable(struct drm_panel *panel)

{

	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);



	if (!sharp_nt->enabled)

		return 0;



	if (sharp_nt->backlight) {

		sharp_nt->backlight->props.power = FB_BLANK_POWERDOWN;

		backlight_update_status(sharp_nt->backlight);

	}



	sharp_nt->enabled = false;



	return 0;

}



static int sharp_nt_panel_unprepare(struct drm_panel *panel)

{

	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);

	int ret;



	if (!sharp_nt->prepared)

		return 0;



	ret = sharp_nt_panel_off(sharp_nt);

	if (ret < 0) {

		dev_err(panel->dev, "failed to set panel off: %d\n", ret);

		return ret;

	}



	regulator_disable(sharp_nt->supply);

	if (sharp_nt->reset_gpio)

		gpiod_set_value(sharp_nt->reset_gpio, 0);



	sharp_nt->prepared = false;



	return 0;

}



static int sharp_nt_panel_prepare(struct drm_panel *panel)

{

	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);

	int ret;



	if (sharp_nt->prepared)

		return 0;



	ret = regulator_enable(sharp_nt->supply);

	if (ret < 0)

		return ret;



	msleep(20);



	if (sharp_nt->reset_gpio) {

		gpiod_set_value(sharp_nt->reset_gpio, 1);

		msleep(1);

		gpiod_set_value(sharp_nt->reset_gpio, 0);

		msleep(1);

		gpiod_set_value(sharp_nt->reset_gpio, 1);

		msleep(10);

	}



	ret = sharp_nt_panel_init(sharp_nt);

	if (ret < 0) {

		dev_err(panel->dev, "failed to init panel: %d\n", ret);

		goto poweroff;

	}



	ret = sharp_nt_panel_on(sharp_nt);

	if (ret < 0) {

		dev_err(panel->dev, "failed to set panel on: %d\n", ret);

		goto poweroff;

	}



	sharp_nt->prepared = true;



	return 0;



poweroff:

	regulator_disable(sharp_nt->supply);

	if (sharp_nt->reset_gpio)

		gpiod_set_value(sharp_nt->reset_gpio, 0);

	return ret;

}



static int sharp_nt_panel_enable(struct drm_panel *panel)

{

	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);



	if (sharp_nt->enabled)

		return 0;



	if (sharp_nt->backlight) {

		sharp_nt->backlight->props.power = FB_BLANK_UNBLANK;

		backlight_update_status(sharp_nt->backlight);

	}



	sharp_nt->enabled = true;



	return 0;

}



static const struct drm_display_mode default_mode = {

	.clock = 41118,

	.hdisplay = 540,

	.hsync_start = 540 + 48,

	.hsync_end = 540 + 48 + 80,

	.htotal = 540 + 48 + 80 + 32,

	.vdisplay = 960,

	.vsync_start = 960 + 3,

	.vsync_end = 960 + 3 + 15,

	.vtotal = 960 + 3 + 15 + 1,

	.vrefresh = 60,

};



static int sharp_nt_panel_get_modes(struct drm_panel *panel)

{

	struct drm_display_mode *mode;



	mode = drm_mode_duplicate(panel->drm, &default_mode);

	if (!mode) {

		dev_err(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 = 54;

	panel->connector->display_info.height_mm = 95;



	return 1;

}



static const struct drm_panel_funcs sharp_nt_panel_funcs = {

	.disable = sharp_nt_panel_disable,

	.unprepare = sharp_nt_panel_unprepare,

	.prepare = sharp_nt_panel_prepare,

	.enable = sharp_nt_panel_enable,

	.get_modes = sharp_nt_panel_get_modes,

};



static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)

{

	struct device *dev = &sharp_nt->dsi->dev;

	struct device_node *np;

	int ret;



	sharp_nt->mode = &default_mode;



	sharp_nt->supply = devm_regulator_get(dev, "avdd");

	if (IS_ERR(sharp_nt->supply))

		return PTR_ERR(sharp_nt->supply);



	sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);

	if (IS_ERR(sharp_nt->reset_gpio)) {

		dev_err(dev, "cannot get reset-gpios %ld\n",

			PTR_ERR(sharp_nt->reset_gpio));

		sharp_nt->reset_gpio = NULL;

	} else {

		gpiod_set_value(sharp_nt->reset_gpio, 0);

	}



	np = of_parse_phandle(dev->of_node, "backlight", 0);

	if (np) {

		sharp_nt->backlight = of_find_backlight_by_node(np);

		of_node_put(np);



		if (!sharp_nt->backlight)

			return -EPROBE_DEFER;

	}



	drm_panel_init(&sharp_nt->base);

	sharp_nt->base.funcs = &sharp_nt_panel_funcs;

	sharp_nt->base.dev = &sharp_nt->dsi->dev;



	ret = drm_panel_add(&sharp_nt->base);

	if (ret < 0)

		goto put_backlight;



	return 0;



put_backlight:

	if (sharp_nt->backlight)

		put_device(&sharp_nt->backlight->dev);



	return ret;

}



static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)

{

	if (sharp_nt->base.dev)

		drm_panel_remove(&sharp_nt->base);



	if (sharp_nt->backlight)

		put_device(&sharp_nt->backlight->dev);

}



static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)

{

	struct sharp_nt_panel *sharp_nt;

	int ret;



	dsi->lanes = 2;

	dsi->format = MIPI_DSI_FMT_RGB888;

	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |

			MIPI_DSI_MODE_VIDEO_HSE |

			MIPI_DSI_CLOCK_NON_CONTINUOUS |

			MIPI_DSI_MODE_EOT_PACKET;



	sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);

	if (!sharp_nt)

		return -ENOMEM;



	mipi_dsi_set_drvdata(dsi, sharp_nt);



	sharp_nt->dsi = dsi;



	ret = sharp_nt_panel_add(sharp_nt);

	if (ret < 0)

		return ret;



	return mipi_dsi_attach(dsi);

}



static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)

{

	struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);

	int ret;



	ret = sharp_nt_panel_disable(&sharp_nt->base);

	if (ret < 0)

		dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);



	ret = mipi_dsi_detach(dsi);

	if (ret < 0)

		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);



	drm_panel_detach(&sharp_nt->base);

	sharp_nt_panel_del(sharp_nt);



	return 0;

}



static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)

{

	struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);



	sharp_nt_panel_disable(&sharp_nt->base);

}



static const struct of_device_id sharp_nt_of_match[] = {

	{ .compatible = "sharp,ls043t1le01-qhd", },

	{ }

};

MODULE_DEVICE_TABLE(of, sharp_nt_of_match);



static struct mipi_dsi_driver sharp_nt_panel_driver = {

	.driver = {

		.name = "panel-sharp-ls043t1le01-qhd",

		.of_match_table = sharp_nt_of_match,

	},

	.probe = sharp_nt_panel_probe,

	.remove = sharp_nt_panel_remove,

	.shutdown = sharp_nt_panel_shutdown,

};

module_mipi_dsi_driver(sharp_nt_panel_driver);



MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");

MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");

MODULE_LICENSE("GPL v2");

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