drm/panel: Add Panasonic VVX10F034N00 MIPI DSI panel

	  Say Y here if you want to enable support for LG4573 RGB panel.

	  To compile this driver as a module, choose M here.

config DRM_PANEL_PANASONIC_VVX10F034N00

	tristate "Panasonic VVX10F034N00 1920x1200 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 Panasonic VVX10F034N00

	  WUXGA (1920x1200) Novatek NT1397-based DSI panel as found in some

	  Xperia Z2 tablets

config DRM_PANEL_SAMSUNG_S6E8AA0

	tristate "Samsung S6E8AA0 DSI video mode panel"

	depends on OF

obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o

obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o

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

/*

 * 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/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>

/*

 * When power is turned off to this panel a minimum off time of 500ms has to be

 * observed before powering back on as there's no external reset pin. Keep

 * track of earliest wakeup time and delay subsequent prepare call accordingly

 */

#define MIN_POFF_MS (500)

struct wuxga_nt_panel {

	struct drm_panel base;

	struct mipi_dsi_device *dsi;

	struct backlight_device *backlight;

	struct regulator *supply;

	bool prepared;

	bool enabled;

	ktime_t earliest_wake;

	const struct drm_display_mode *mode;

};

static inline struct wuxga_nt_panel *to_wuxga_nt_panel(struct drm_panel *panel)

{

	return container_of(panel, struct wuxga_nt_panel, base);

}

static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt)

{

	struct mipi_dsi_device *dsi = wuxga_nt->dsi;

	int ret;

	ret = mipi_dsi_turn_on_peripheral(dsi);

	if (ret < 0)

		return ret;

	return 0;

}

static int wuxga_nt_panel_disable(struct drm_panel *panel)

{

	struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);

	if (!wuxga_nt->enabled)

		return 0;

	mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);

	if (wuxga_nt->backlight) {

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

		wuxga_nt->backlight->props.state |= BL_CORE_FBBLANK;

		backlight_update_status(wuxga_nt->backlight);

	}

	wuxga_nt->enabled = false;

	return 0;

}

static int wuxga_nt_panel_unprepare(struct drm_panel *panel)

{

	struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);

	if (!wuxga_nt->prepared)

		return 0;

	regulator_disable(wuxga_nt->supply);

	wuxga_nt->earliest_wake = ktime_add_ms(ktime_get_real(), MIN_POFF_MS);

	wuxga_nt->prepared = false;

	return 0;

}

static int wuxga_nt_panel_prepare(struct drm_panel *panel)

{

	struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);

	int ret;

	s64 enablewait;

	if (wuxga_nt->prepared)

		return 0;

	/*

	 * If the user re-enabled the panel before the required off-time then

	 * we need to wait the remaining period before re-enabling regulator

	 */

	enablewait = ktime_ms_delta(wuxga_nt->earliest_wake, ktime_get_real());

	/* Sanity check, this should never happen */

	if (enablewait > MIN_POFF_MS)

		enablewait = MIN_POFF_MS;

	if (enablewait > 0)

		msleep(enablewait);

	ret = regulator_enable(wuxga_nt->supply);

	if (ret < 0)

		return ret;

	/*

	 * A minimum delay of 250ms is required after power-up until commands

	 * can be sent

	 */

	msleep(250);

	ret = wuxga_nt_panel_on(wuxga_nt);

	if (ret < 0) {

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

		goto poweroff;

	}

	wuxga_nt->prepared = true;

	return 0;

poweroff:

	regulator_disable(wuxga_nt->supply);

	return ret;

}

static int wuxga_nt_panel_enable(struct drm_panel *panel)

{

	struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);

	if (wuxga_nt->enabled)

		return 0;

	if (wuxga_nt->backlight) {

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

		wuxga_nt->backlight->props.state &= ~BL_CORE_FBBLANK;

		backlight_update_status(wuxga_nt->backlight);

	}

	wuxga_nt->enabled = true;

	return 0;

}

static const struct drm_display_mode default_mode = {

	.clock = 164402,

	.hdisplay = 1920,

	.hsync_start = 1920 + 152,

	.hsync_end = 1920 + 152 + 52,

	.htotal = 1920 + 152 + 52 + 20,

	.vdisplay = 1200,

	.vsync_start = 1200 + 24,

	.vsync_end = 1200 + 24 + 6,

	.vtotal = 1200 + 24 + 6 + 48,

	.vrefresh = 60,

};

static int wuxga_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 = 217;

	panel->connector->display_info.height_mm = 136;

	return 1;

}

static const struct drm_panel_funcs wuxga_nt_panel_funcs = {

	.disable = wuxga_nt_panel_disable,

	.unprepare = wuxga_nt_panel_unprepare,

	.prepare = wuxga_nt_panel_prepare,

	.enable = wuxga_nt_panel_enable,

	.get_modes = wuxga_nt_panel_get_modes,

};

static const struct of_device_id wuxga_nt_of_match[] = {

	{ .compatible = "panasonic,vvx10f034n00", },

	{ }

};

MODULE_DEVICE_TABLE(of, wuxga_nt_of_match);

static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt)

{

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

	struct device_node *np;

	int ret;

	wuxga_nt->mode = &default_mode;

	wuxga_nt->supply = devm_regulator_get(dev, "power");

	if (IS_ERR(wuxga_nt->supply))

		return PTR_ERR(wuxga_nt->supply);

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

	if (np) {

		wuxga_nt->backlight = of_find_backlight_by_node(np);

		of_node_put(np);

		if (!wuxga_nt->backlight)

			return -EPROBE_DEFER;

	}

	drm_panel_init(&wuxga_nt->base);

	wuxga_nt->base.funcs = &wuxga_nt_panel_funcs;

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

	ret = drm_panel_add(&wuxga_nt->base);

	if (ret < 0)

		goto put_backlight;

	return 0;

put_backlight:

	if (wuxga_nt->backlight)

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

	return ret;

}

static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt)

{

	if (wuxga_nt->base.dev)

		drm_panel_remove(&wuxga_nt->base);

	if (wuxga_nt->backlight)

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

}

static int wuxga_nt_panel_probe(struct mipi_dsi_device *dsi)

{

	struct wuxga_nt_panel *wuxga_nt;

	int ret;

	dsi->lanes = 4;

	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_LPM;

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

	if (!wuxga_nt)

		return -ENOMEM;

	mipi_dsi_set_drvdata(dsi, wuxga_nt);

	wuxga_nt->dsi = dsi;

	ret = wuxga_nt_panel_add(wuxga_nt);

	if (ret < 0)

		return ret;

	return mipi_dsi_attach(dsi);

}

static int wuxga_nt_panel_remove(struct mipi_dsi_device *dsi)

{

	struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);

	int ret;

	ret = wuxga_nt_panel_disable(&wuxga_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(&wuxga_nt->base);

	wuxga_nt_panel_del(wuxga_nt);

	return 0;

}

static void wuxga_nt_panel_shutdown(struct mipi_dsi_device *dsi)

{

	struct wuxga_nt_panel *wuxga_nt = mipi_dsi_get_drvdata(dsi);

	wuxga_nt_panel_disable(&wuxga_nt->base);

}

static struct mipi_dsi_driver wuxga_nt_panel_driver = {

	.driver = {

		.name = "panel-panasonic-vvx10f034n00",

		.of_match_table = wuxga_nt_of_match,

	},

	.probe = wuxga_nt_panel_probe,

	.remove = wuxga_nt_panel_remove,

	.shutdown = wuxga_nt_panel_shutdown,

};

module_mipi_dsi_driver(wuxga_nt_panel_driver);

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

MODULE_DESCRIPTION("Panasonic VVX10F034N00 Novatek NT1397-based WUXGA (1920x1200) video mode panel driver");

MODULE_LICENSE("GPL v2");