From 84192742d9c26d75f26751f9e692cc68230d43a5 Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Fri, 24 May 2013 14:22:31 +0300
Subject: OMAPDSS: Add Sony ACX565AKM panel driver

Add Sony ACX565AKM panel driver which uses the new DSS device model and
DSS ops.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
---
 drivers/video/omap2/displays-new/Kconfig           |   6 +
 drivers/video/omap2/displays-new/Makefile          |   1 +
 .../omap2/displays-new/panel-sony-acx565akm.c      | 865 +++++++++++++++++++++
 3 files changed, 872 insertions(+)
 create mode 100644 drivers/video/omap2/displays-new/panel-sony-acx565akm.c

(limited to 'drivers/video/omap2')

diff --git a/drivers/video/omap2/displays-new/Kconfig b/drivers/video/omap2/displays-new/Kconfig
index efb72b352efd..25696583e206 100644
--- a/drivers/video/omap2/displays-new/Kconfig
+++ b/drivers/video/omap2/displays-new/Kconfig
@@ -38,4 +38,10 @@ config DISPLAY_PANEL_DSI_CM
 	help
 	  Driver for generic DSI command mode panels.
 
+config DISPLAY_PANEL_SONY_ACX565AKM
+	tristate "ACX565AKM Panel"
+	depends on SPI && BACKLIGHT_CLASS_DEVICE
+	help
+	  This is the LCD panel used on Nokia N900
+
 endmenu
diff --git a/drivers/video/omap2/displays-new/Makefile b/drivers/video/omap2/displays-new/Makefile
index 557c48226296..c07bd1e17f47 100644
--- a/drivers/video/omap2/displays-new/Makefile
+++ b/drivers/video/omap2/displays-new/Makefile
@@ -5,3 +5,4 @@ obj-$(CONFIG_DISPLAY_CONNECTOR_HDMI) += connector-hdmi.o
 obj-$(CONFIG_DISPLAY_CONNECTOR_ANALOG_TV) += connector-analog-tv.o
 obj-$(CONFIG_DISPLAY_PANEL_DPI) += panel-dpi.o
 obj-$(CONFIG_DISPLAY_PANEL_DSI_CM) += panel-dsi-cm.o
+obj-$(CONFIG_DISPLAY_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
diff --git a/drivers/video/omap2/displays-new/panel-sony-acx565akm.c b/drivers/video/omap2/displays-new/panel-sony-acx565akm.c
new file mode 100644
index 000000000000..e6d56f714ae4
--- /dev/null
+++ b/drivers/video/omap2/displays-new/panel-sony-acx565akm.c
@@ -0,0 +1,865 @@
+/*
+ * Sony ACX565AKM LCD Panel driver
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Original Driver Author: Imre Deak <imre.deak@nokia.com>
+ * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com>
+ * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.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/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <linux/backlight.h>
+#include <linux/fb.h>
+#include <linux/gpio.h>
+
+#include <video/omapdss.h>
+#include <video/omap-panel-data.h>
+
+#define MIPID_CMD_READ_DISP_ID		0x04
+#define MIPID_CMD_READ_RED		0x06
+#define MIPID_CMD_READ_GREEN		0x07
+#define MIPID_CMD_READ_BLUE		0x08
+#define MIPID_CMD_READ_DISP_STATUS	0x09
+#define MIPID_CMD_RDDSDR		0x0F
+#define MIPID_CMD_SLEEP_IN		0x10
+#define MIPID_CMD_SLEEP_OUT		0x11
+#define MIPID_CMD_DISP_OFF		0x28
+#define MIPID_CMD_DISP_ON		0x29
+#define MIPID_CMD_WRITE_DISP_BRIGHTNESS	0x51
+#define MIPID_CMD_READ_DISP_BRIGHTNESS	0x52
+#define MIPID_CMD_WRITE_CTRL_DISP	0x53
+
+#define CTRL_DISP_BRIGHTNESS_CTRL_ON	(1 << 5)
+#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON	(1 << 4)
+#define CTRL_DISP_BACKLIGHT_ON		(1 << 2)
+#define CTRL_DISP_AUTO_BRIGHTNESS_ON	(1 << 1)
+
+#define MIPID_CMD_READ_CTRL_DISP	0x54
+#define MIPID_CMD_WRITE_CABC		0x55
+#define MIPID_CMD_READ_CABC		0x56
+
+#define MIPID_VER_LPH8923		3
+#define MIPID_VER_LS041Y3		4
+#define MIPID_VER_L4F00311		8
+#define MIPID_VER_ACX565AKM		9
+
+struct panel_drv_data {
+	struct omap_dss_device	dssdev;
+	struct omap_dss_device *in;
+
+	int reset_gpio;
+	int datapairs;
+
+	struct omap_video_timings videomode;
+
+	char		*name;
+	int		enabled;
+	int		model;
+	int		revision;
+	u8		display_id[3];
+	unsigned	has_bc:1;
+	unsigned	has_cabc:1;
+	unsigned	cabc_mode;
+	unsigned long	hw_guard_end;		/* next value of jiffies
+						   when we can issue the
+						   next sleep in/out command */
+	unsigned long	hw_guard_wait;		/* max guard time in jiffies */
+
+	struct spi_device	*spi;
+	struct mutex		mutex;
+
+	struct backlight_device *bl_dev;
+};
+
+static const struct omap_video_timings acx565akm_panel_timings = {
+	.x_res		= 800,
+	.y_res		= 480,
+	.pixel_clock	= 24000,
+	.hfp		= 28,
+	.hsw		= 4,
+	.hbp		= 24,
+	.vfp		= 3,
+	.vsw		= 3,
+	.vbp		= 4,
+
+	.vsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
+	.hsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
+
+	.data_pclk_edge	= OMAPDSS_DRIVE_SIG_RISING_EDGE,
+	.de_level	= OMAPDSS_SIG_ACTIVE_HIGH,
+	.sync_pclk_edge	= OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
+};
+
+#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
+
+static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd,
+			      const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
+{
+	struct spi_message	m;
+	struct spi_transfer	*x, xfer[5];
+	int			r;
+
+	BUG_ON(ddata->spi == NULL);
+
+	spi_message_init(&m);
+
+	memset(xfer, 0, sizeof(xfer));
+	x = &xfer[0];
+
+	cmd &=  0xff;
+	x->tx_buf = &cmd;
+	x->bits_per_word = 9;
+	x->len = 2;
+
+	if (rlen > 1 && wlen == 0) {
+		/*
+		 * Between the command and the response data there is a
+		 * dummy clock cycle. Add an extra bit after the command
+		 * word to account for this.
+		 */
+		x->bits_per_word = 10;
+		cmd <<= 1;
+	}
+	spi_message_add_tail(x, &m);
+
+	if (wlen) {
+		x++;
+		x->tx_buf = wbuf;
+		x->len = wlen;
+		x->bits_per_word = 9;
+		spi_message_add_tail(x, &m);
+	}
+
+	if (rlen) {
+		x++;
+		x->rx_buf	= rbuf;
+		x->len		= rlen;
+		spi_message_add_tail(x, &m);
+	}
+
+	r = spi_sync(ddata->spi, &m);
+	if (r < 0)
+		dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r);
+}
+
+static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd)
+{
+	acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0);
+}
+
+static inline void acx565akm_write(struct panel_drv_data *ddata,
+			       int reg, const u8 *buf, int len)
+{
+	acx565akm_transfer(ddata, reg, buf, len, NULL, 0);
+}
+
+static inline void acx565akm_read(struct panel_drv_data *ddata,
+			      int reg, u8 *buf, int len)
+{
+	acx565akm_transfer(ddata, reg, NULL, 0, buf, len);
+}
+
+static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
+{
+	ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
+	ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
+}
+
+static void hw_guard_wait(struct panel_drv_data *ddata)
+{
+	unsigned long wait = ddata->hw_guard_end - jiffies;
+
+	if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(wait);
+	}
+}
+
+static void set_sleep_mode(struct panel_drv_data *ddata, int on)
+{
+	int cmd;
+
+	if (on)
+		cmd = MIPID_CMD_SLEEP_IN;
+	else
+		cmd = MIPID_CMD_SLEEP_OUT;
+	/*
+	 * We have to keep 120msec between sleep in/out commands.
+	 * (8.2.15, 8.2.16).
+	 */
+	hw_guard_wait(ddata);
+	acx565akm_cmd(ddata, cmd);
+	hw_guard_start(ddata, 120);
+}
+
+static void set_display_state(struct panel_drv_data *ddata, int enabled)
+{
+	int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
+
+	acx565akm_cmd(ddata, cmd);
+}
+
+static int panel_enabled(struct panel_drv_data *ddata)
+{
+	u32 disp_status;
+	int enabled;
+
+	acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS,
+			(u8 *)&disp_status, 4);
+	disp_status = __be32_to_cpu(disp_status);
+	enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
+	dev_dbg(&ddata->spi->dev,
+		"LCD panel %senabled by bootloader (status 0x%04x)\n",
+		enabled ? "" : "not ", disp_status);
+	return enabled;
+}
+
+static int panel_detect(struct panel_drv_data *ddata)
+{
+	acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3);
+	dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n",
+		ddata->display_id[0],
+		ddata->display_id[1],
+		ddata->display_id[2]);
+
+	switch (ddata->display_id[0]) {
+	case 0x10:
+		ddata->model = MIPID_VER_ACX565AKM;
+		ddata->name = "acx565akm";
+		ddata->has_bc = 1;
+		ddata->has_cabc = 1;
+		break;
+	case 0x29:
+		ddata->model = MIPID_VER_L4F00311;
+		ddata->name = "l4f00311";
+		break;
+	case 0x45:
+		ddata->model = MIPID_VER_LPH8923;
+		ddata->name = "lph8923";
+		break;
+	case 0x83:
+		ddata->model = MIPID_VER_LS041Y3;
+		ddata->name = "ls041y3";
+		break;
+	default:
+		ddata->name = "unknown";
+		dev_err(&ddata->spi->dev, "invalid display ID\n");
+		return -ENODEV;
+	}
+
+	ddata->revision = ddata->display_id[1];
+
+	dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n",
+			ddata->name, ddata->revision);
+
+	return 0;
+}
+
+/*----------------------Backlight Control-------------------------*/
+
+static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
+{
+	u16 ctrl;
+
+	acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
+	if (enable) {
+		ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
+			CTRL_DISP_BACKLIGHT_ON;
+	} else {
+		ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
+			  CTRL_DISP_BACKLIGHT_ON);
+	}
+
+	ctrl |= 1 << 8;
+	acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
+}
+
+static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
+{
+	u16 cabc_ctrl;
+
+	ddata->cabc_mode = mode;
+	if (!ddata->enabled)
+		return;
+	cabc_ctrl = 0;
+	acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
+	cabc_ctrl &= ~3;
+	cabc_ctrl |= (1 << 8) | (mode & 3);
+	acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
+}
+
+static unsigned get_cabc_mode(struct panel_drv_data *ddata)
+{
+	return ddata->cabc_mode;
+}
+
+static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata)
+{
+	u8 cabc_ctrl;
+
+	acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
+	return cabc_ctrl & 3;
+}
+
+static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level)
+{
+	int bv;
+
+	bv = level | (1 << 8);
+	acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
+
+	if (level)
+		enable_backlight_ctrl(ddata, 1);
+	else
+		enable_backlight_ctrl(ddata, 0);
+}
+
+static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
+{
+	u8 bv;
+
+	acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
+
+	return bv;
+}
+
+
+static int acx565akm_bl_update_status(struct backlight_device *dev)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+	int r;
+	int level;
+
+	dev_dbg(&ddata->spi->dev, "%s\n", __func__);
+
+	mutex_lock(&ddata->mutex);
+
+	if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+			dev->props.power == FB_BLANK_UNBLANK)
+		level = dev->props.brightness;
+	else
+		level = 0;
+
+	r = 0;
+	if (ddata->has_bc)
+		acx565akm_set_brightness(ddata, level);
+	else
+		r = -ENODEV;
+
+	mutex_unlock(&ddata->mutex);
+
+	return r;
+}
+
+static int acx565akm_bl_get_intensity(struct backlight_device *dev)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+
+	dev_dbg(&dev->dev, "%s\n", __func__);
+
+	if (!ddata->has_bc)
+		return -ENODEV;
+
+	if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+			dev->props.power == FB_BLANK_UNBLANK) {
+		if (ddata->has_bc)
+			return acx565akm_get_actual_brightness(ddata);
+		else
+			return dev->props.brightness;
+	}
+
+	return 0;
+}
+
+static const struct backlight_ops acx565akm_bl_ops = {
+	.get_brightness = acx565akm_bl_get_intensity,
+	.update_status  = acx565akm_bl_update_status,
+};
+
+/*--------------------Auto Brightness control via Sysfs---------------------*/
+
+static const char * const cabc_modes[] = {
+	"off",		/* always used when CABC is not supported */
+	"ui",
+	"still-image",
+	"moving-image",
+};
+
+static ssize_t show_cabc_mode(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(dev);
+	const char *mode_str;
+	int mode;
+	int len;
+
+	if (!ddata->has_cabc)
+		mode = 0;
+	else
+		mode = get_cabc_mode(ddata);
+	mode_str = "unknown";
+	if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
+		mode_str = cabc_modes[mode];
+	len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
+
+	return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
+}
+
+static ssize_t store_cabc_mode(struct device *dev,
+		struct device_attribute *attr,
+		const char *buf, size_t count)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
+		const char *mode_str = cabc_modes[i];
+		int cmp_len = strlen(mode_str);
+
+		if (count > 0 && buf[count - 1] == '\n')
+			count--;
+		if (count != cmp_len)
+			continue;
+
+		if (strncmp(buf, mode_str, cmp_len) == 0)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(cabc_modes))
+		return -EINVAL;
+
+	if (!ddata->has_cabc && i != 0)
+		return -EINVAL;
+
+	mutex_lock(&ddata->mutex);
+	set_cabc_mode(ddata, i);
+	mutex_unlock(&ddata->mutex);
+
+	return count;
+}
+
+static ssize_t show_cabc_available_modes(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(dev);
+	int len;
+	int i;
+
+	if (!ddata->has_cabc)
+		return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
+
+	for (i = 0, len = 0;
+	     len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
+		len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
+			i ? " " : "", cabc_modes[i],
+			i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
+
+	return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
+}
+
+static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
+		show_cabc_mode, store_cabc_mode);
+static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
+		show_cabc_available_modes, NULL);
+
+static struct attribute *bldev_attrs[] = {
+	&dev_attr_cabc_mode.attr,
+	&dev_attr_cabc_available_modes.attr,
+	NULL,
+};
+
+static struct attribute_group bldev_attr_group = {
+	.attrs = bldev_attrs,
+};
+
+static int acx565akm_connect(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+	int r;
+
+	if (omapdss_device_is_connected(dssdev))
+		return 0;
+
+	r = in->ops.sdi->connect(in, dssdev);
+	if (r)
+		return r;
+
+	return 0;
+}
+
+static void acx565akm_disconnect(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	if (!omapdss_device_is_connected(dssdev))
+		return;
+
+	in->ops.sdi->disconnect(in, dssdev);
+}
+
+static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+	int r;
+
+	dev_dbg(&ddata->spi->dev, "%s\n", __func__);
+
+	in->ops.sdi->set_timings(in, &ddata->videomode);
+	in->ops.sdi->set_datapairs(in, ddata->datapairs);
+
+	r = in->ops.sdi->enable(in);
+	if (r) {
+		pr_err("%s sdi enable failed\n", __func__);
+		return r;
+	}
+
+	/*FIXME tweak me */
+	msleep(50);
+
+	if (gpio_is_valid(ddata->reset_gpio))
+		gpio_set_value(ddata->reset_gpio, 1);
+
+	if (ddata->enabled) {
+		dev_dbg(&ddata->spi->dev, "panel already enabled\n");
+		return 0;
+	}
+
+	/*
+	 * We have to meet all the following delay requirements:
+	 * 1. tRW: reset pulse width 10usec (7.12.1)
+	 * 2. tRT: reset cancel time 5msec (7.12.1)
+	 * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
+	 *    case (7.6.2)
+	 * 4. 120msec before the sleep out command (7.12.1)
+	 */
+	msleep(120);
+
+	set_sleep_mode(ddata, 0);
+	ddata->enabled = 1;
+
+	/* 5msec between sleep out and the next command. (8.2.16) */
+	usleep_range(5000, 10000);
+	set_display_state(ddata, 1);
+	set_cabc_mode(ddata, ddata->cabc_mode);
+
+	mutex_unlock(&ddata->mutex);
+
+	return acx565akm_bl_update_status(ddata->bl_dev);
+}
+
+static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	dev_dbg(dssdev->dev, "%s\n", __func__);
+
+	if (!ddata->enabled)
+		return;
+
+	set_display_state(ddata, 0);
+	set_sleep_mode(ddata, 1);
+	ddata->enabled = 0;
+	/*
+	 * We have to provide PCLK,HS,VS signals for 2 frames (worst case
+	 * ~50msec) after sending the sleep in command and asserting the
+	 * reset signal. We probably could assert the reset w/o the delay
+	 * but we still delay to avoid possible artifacts. (7.6.1)
+	 */
+	msleep(50);
+
+	if (gpio_is_valid(ddata->reset_gpio))
+		gpio_set_value(ddata->reset_gpio, 0);
+
+	/* FIXME need to tweak this delay */
+	msleep(100);
+
+	in->ops.sdi->disable(in);
+}
+
+static int acx565akm_enable(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	int r;
+
+	dev_dbg(dssdev->dev, "%s\n", __func__);
+
+	if (!omapdss_device_is_connected(dssdev))
+		return -ENODEV;
+
+	if (omapdss_device_is_enabled(dssdev))
+		return 0;
+
+	mutex_lock(&ddata->mutex);
+	r = acx565akm_panel_power_on(dssdev);
+	mutex_unlock(&ddata->mutex);
+
+	if (r)
+		return r;
+
+	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+	return 0;
+}
+
+static void acx565akm_disable(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	dev_dbg(dssdev->dev, "%s\n", __func__);
+
+	if (!omapdss_device_is_enabled(dssdev))
+		return;
+
+	mutex_lock(&ddata->mutex);
+	acx565akm_panel_power_off(dssdev);
+	mutex_unlock(&ddata->mutex);
+
+	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static void acx565akm_set_timings(struct omap_dss_device *dssdev,
+		struct omap_video_timings *timings)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	ddata->videomode = *timings;
+	dssdev->panel.timings = *timings;
+
+	in->ops.sdi->set_timings(in, timings);
+}
+
+static void acx565akm_get_timings(struct omap_dss_device *dssdev,
+		struct omap_video_timings *timings)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	*timings = ddata->videomode;
+}
+
+static int acx565akm_check_timings(struct omap_dss_device *dssdev,
+		struct omap_video_timings *timings)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+	struct omap_dss_device *in = ddata->in;
+
+	return in->ops.sdi->check_timings(in, timings);
+}
+
+static struct omap_dss_driver acx565akm_ops = {
+	.connect	= acx565akm_connect,
+	.disconnect	= acx565akm_disconnect,
+
+	.enable		= acx565akm_enable,
+	.disable	= acx565akm_disable,
+
+	.set_timings	= acx565akm_set_timings,
+	.get_timings	= acx565akm_get_timings,
+	.check_timings	= acx565akm_check_timings,
+
+	.get_resolution	= omapdss_default_get_resolution,
+};
+
+static int acx565akm_probe_pdata(struct spi_device *spi)
+{
+	const struct panel_acx565akm_platform_data *pdata;
+	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+	struct omap_dss_device *dssdev, *in;
+
+	pdata = dev_get_platdata(&spi->dev);
+
+	ddata->reset_gpio = pdata->reset_gpio;
+
+	in = omap_dss_find_output(pdata->source);
+	if (in == NULL) {
+		dev_err(&spi->dev, "failed to find video source '%s'\n",
+				pdata->source);
+		return -EPROBE_DEFER;
+	}
+	ddata->in = in;
+
+	ddata->datapairs = pdata->datapairs;
+
+	dssdev = &ddata->dssdev;
+	dssdev->name = pdata->name;
+
+	return 0;
+}
+
+static int acx565akm_probe(struct spi_device *spi)
+{
+	struct panel_drv_data *ddata;
+	struct omap_dss_device *dssdev;
+	struct backlight_device *bldev;
+	int max_brightness, brightness;
+	struct backlight_properties props;
+	int r;
+
+	dev_dbg(&spi->dev, "%s\n", __func__);
+
+	spi->mode = SPI_MODE_3;
+
+	ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
+	if (ddata == NULL)
+		return -ENOMEM;
+
+	dev_set_drvdata(&spi->dev, ddata);
+
+	ddata->spi = spi;
+
+	mutex_init(&ddata->mutex);
+
+	if (dev_get_platdata(&spi->dev)) {
+		r = acx565akm_probe_pdata(spi);
+		if (r)
+			return r;
+	} else {
+		return -ENODEV;
+	}
+
+	if (gpio_is_valid(ddata->reset_gpio)) {
+		r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio,
+				GPIOF_OUT_INIT_LOW, "lcd reset");
+		if (r)
+			goto err_gpio;
+	}
+
+	if (gpio_is_valid(ddata->reset_gpio))
+		gpio_set_value(ddata->reset_gpio, 1);
+
+	/*
+	 * After reset we have to wait 5 msec before the first
+	 * command can be sent.
+	 */
+	usleep_range(5000, 10000);
+
+	ddata->enabled = panel_enabled(ddata);
+
+	r = panel_detect(ddata);
+
+	if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio))
+		gpio_set_value(ddata->reset_gpio, 0);
+
+	if (r) {
+		dev_err(&spi->dev, "%s panel detect error\n", __func__);
+		goto err_detect;
+	}
+
+	memset(&props, 0, sizeof(props));
+	props.fb_blank = FB_BLANK_UNBLANK;
+	props.power = FB_BLANK_UNBLANK;
+	props.type = BACKLIGHT_RAW;
+
+	bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
+			ddata, &acx565akm_bl_ops, &props);
+	ddata->bl_dev = bldev;
+	if (ddata->has_cabc) {
+		r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
+		if (r) {
+			dev_err(&bldev->dev,
+				"%s failed to create sysfs files\n", __func__);
+			goto err_sysfs;
+		}
+		ddata->cabc_mode = get_hw_cabc_mode(ddata);
+	}
+
+	max_brightness = 255;
+
+	if (ddata->has_bc)
+		brightness = acx565akm_get_actual_brightness(ddata);
+	else
+		brightness = 0;
+
+	bldev->props.max_brightness = max_brightness;
+	bldev->props.brightness = brightness;
+
+	acx565akm_bl_update_status(bldev);
+
+
+	ddata->videomode = acx565akm_panel_timings;
+
+	dssdev = &ddata->dssdev;
+	dssdev->dev = &spi->dev;
+	dssdev->driver = &acx565akm_ops;
+	dssdev->type = OMAP_DISPLAY_TYPE_SDI;
+	dssdev->owner = THIS_MODULE;
+	dssdev->panel.timings = ddata->videomode;
+
+	r = omapdss_register_display(dssdev);
+	if (r) {
+		dev_err(&spi->dev, "Failed to register panel\n");
+		goto err_reg;
+	}
+
+	return 0;
+
+err_reg:
+	sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
+err_sysfs:
+	backlight_device_unregister(bldev);
+err_detect:
+err_gpio:
+	omap_dss_put_device(ddata->in);
+	return r;
+}
+
+static int acx565akm_remove(struct spi_device *spi)
+{
+	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+	struct omap_dss_device *dssdev = &ddata->dssdev;
+	struct omap_dss_device *in = ddata->in;
+
+	dev_dbg(&ddata->spi->dev, "%s\n", __func__);
+
+	sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
+	backlight_device_unregister(ddata->bl_dev);
+
+	omapdss_unregister_display(dssdev);
+
+	acx565akm_disable(dssdev);
+	acx565akm_disconnect(dssdev);
+
+	omap_dss_put_device(in);
+
+	return 0;
+}
+
+static struct spi_driver acx565akm_driver = {
+	.driver = {
+		.name	= "acx565akm",
+		.owner	= THIS_MODULE,
+	},
+	.probe	= acx565akm_probe,
+	.remove	= acx565akm_remove,
+};
+
+module_spi_driver(acx565akm_driver);
+
+MODULE_AUTHOR("Nokia Corporation");
+MODULE_DESCRIPTION("acx565akm LCD Driver");
+MODULE_LICENSE("GPL");
-- 
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