[PATCH 17/23] OMAP: DSS2: Add ACX565AKM Panel Driver

[Tomi Valkeinen <tomi.valkeinen@nokia.com>]

From: Roger Quadros <roger.quadros@nokia.com>

This is the panel used on Nokia N900

Signed-off-by: Roger Quadros <roger.quadros@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
---
 drivers/video/omap2/displays/Kconfig           |    6 +
 drivers/video/omap2/displays/Makefile          |    1 +
 drivers/video/omap2/displays/panel-acx565akm.c |  819 ++++++++++++++++++++++++
 3 files changed, 826 insertions(+), 0 deletions(-)
 create mode 100644 drivers/video/omap2/displays/panel-acx565akm.c

diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig
index 4221957..881c9f7 100644
--- a/drivers/video/omap2/displays/Kconfig
+++ b/drivers/video/omap2/displays/Kconfig
@@ -38,4 +38,10 @@ config PANEL_TPO_TD043MTEA1
         help
           LCD Panel used in OMAP3 Pandora
 
+config PANEL_ACX565AKM
+	tristate "ACX565AKM Panel"
+	depends on OMAP2_DSS_SDI
+	select BACKLIGHT_CLASS_DEVICE
+	help
+	  This is the LCD panel used on Nokia N900
 endmenu
diff --git a/drivers/video/omap2/displays/Makefile b/drivers/video/omap2/displays/Makefile
index e2bb321..aa38609 100644
--- a/drivers/video/omap2/displays/Makefile
+++ b/drivers/video/omap2/displays/Makefile
@@ -5,3 +5,4 @@ obj-$(CONFIG_PANEL_SHARP_LQ043T1DG01) += panel-sharp-lq043t1dg01.o
 obj-$(CONFIG_PANEL_TAAL) += panel-taal.o
 obj-$(CONFIG_PANEL_TOPPOLY_TDO35S) += panel-toppoly-tdo35s.o
 obj-$(CONFIG_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
+obj-$(CONFIG_PANEL_ACX565AKM) += panel-acx565akm.o
diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c
new file mode 100644
index 0000000..1f8eb70
--- /dev/null
+++ b/drivers/video/omap2/displays/panel-acx565akm.c
@@ -0,0 +1,819 @@
+/*
+ * Support for ACX565AKM LCD Panel used on Nokia N900
+ *
+ * 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 <plat/display.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 acx565akm_device {
+	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 omap_dss_device	*dssdev;
+	struct backlight_device *bl_dev;
+};
+
+static struct acx565akm_device acx_dev;
+static int acx565akm_bl_update_status(struct backlight_device *dev);
+
+/*--------------------MIPID interface-----------------------------*/
+
+static void acx565akm_transfer(struct acx565akm_device *md, 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(md->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(md->spi, &m);
+	if (r < 0)
+		dev_dbg(&md->spi->dev, "spi_sync %d\n", r);
+}
+
+static inline void acx565akm_cmd(struct acx565akm_device *md, int cmd)
+{
+	acx565akm_transfer(md, cmd, NULL, 0, NULL, 0);
+}
+
+static inline void acx565akm_write(struct acx565akm_device *md,
+			       int reg, const u8 *buf, int len)
+{
+	acx565akm_transfer(md, reg, buf, len, NULL, 0);
+}
+
+static inline void acx565akm_read(struct acx565akm_device *md,
+			      int reg, u8 *buf, int len)
+{
+	acx565akm_transfer(md, reg, NULL, 0, buf, len);
+}
+
+static void hw_guard_start(struct acx565akm_device *md, int guard_msec)
+{
+	md->hw_guard_wait = msecs_to_jiffies(guard_msec);
+	md->hw_guard_end = jiffies + md->hw_guard_wait;
+}
+
+static void hw_guard_wait(struct acx565akm_device *md)
+{
+	unsigned long wait = md->hw_guard_end - jiffies;
+
+	if ((long)wait > 0 && wait <= md->hw_guard_wait) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(wait);
+	}
+}
+
+/*----------------------MIPID wrappers----------------------------*/
+
+static void set_sleep_mode(struct acx565akm_device *md, 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(md);
+	acx565akm_cmd(md, cmd);
+	hw_guard_start(md, 120);
+}
+
+static void set_display_state(struct acx565akm_device *md, int enabled)
+{
+	int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
+
+	acx565akm_cmd(md, cmd);
+}
+
+static int panel_enabled(struct acx565akm_device *md)
+{
+	u32 disp_status;
+	int enabled;
+
+	acx565akm_read(md, 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(&md->spi->dev,
+		"LCD panel %senabled by bootloader (status 0x%04x)\n",
+		enabled ? "" : "not ", disp_status);
+	return enabled;
+}
+
+static int panel_detect(struct acx565akm_device *md)
+{
+	acx565akm_read(md, MIPID_CMD_READ_DISP_ID, md->display_id, 3);
+	dev_dbg(&md->spi->dev, "MIPI display ID: %02x%02x%02x\n",
+		md->display_id[0], md->display_id[1], md->display_id[2]);
+
+	switch (md->display_id[0]) {
+	case 0x10:
+		md->model = MIPID_VER_ACX565AKM;
+		md->name = "acx565akm";
+		md->has_bc = 1;
+		md->has_cabc = 1;
+		break;
+	case 0x29:
+		md->model = MIPID_VER_L4F00311;
+		md->name = "l4f00311";
+		break;
+	case 0x45:
+		md->model = MIPID_VER_LPH8923;
+		md->name = "lph8923";
+		break;
+	case 0x83:
+		md->model = MIPID_VER_LS041Y3;
+		md->name = "ls041y3";
+		break;
+	default:
+		md->name = "unknown";
+		dev_err(&md->spi->dev, "invalid display ID\n");
+		return -ENODEV;
+	}
+
+	md->revision = md->display_id[1];
+
+	dev_info(&md->spi->dev, "omapfb: %s rev %02x LCD detected\n",
+			md->name, md->revision);
+
+	return 0;
+}
+
+/*----------------------Backlight Control-------------------------*/
+
+static void enable_backlight_ctrl(struct acx565akm_device *md, int enable)
+{
+	u16 ctrl;
+
+	acx565akm_read(md, 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(md, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
+}
+
+static void set_cabc_mode(struct acx565akm_device *md, unsigned mode)
+{
+	u16 cabc_ctrl;
+
+	md->cabc_mode = mode;
+	if (!md->enabled)
+		return;
+	cabc_ctrl = 0;
+	acx565akm_read(md, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
+	cabc_ctrl &= ~3;
+	cabc_ctrl |= (1 << 8) | (mode & 3);
+	acx565akm_write(md, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
+}
+
+static unsigned get_cabc_mode(struct acx565akm_device *md)
+{
+	return md->cabc_mode;
+}
+
+static unsigned get_hw_cabc_mode(struct acx565akm_device *md)
+{
+	u8 cabc_ctrl;
+
+	acx565akm_read(md, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
+	return cabc_ctrl & 3;
+}
+
+static void acx565akm_set_brightness(struct acx565akm_device *md, int level)
+{
+	int bv;
+
+	bv = level | (1 << 8);
+	acx565akm_write(md, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
+
+	if (level)
+		enable_backlight_ctrl(md, 1);
+	else
+		enable_backlight_ctrl(md, 0);
+}
+
+static int acx565akm_get_actual_brightness(struct acx565akm_device *md)
+{
+	u8 bv;
+
+	acx565akm_read(md, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
+
+	return bv;
+}
+
+
+static int acx565akm_bl_update_status(struct backlight_device *dev)
+{
+	struct acx565akm_device *md = dev_get_drvdata(&dev->dev);
+	int r;
+	int level;
+
+	dev_dbg(&md->spi->dev, "%s\n", __func__);
+
+	mutex_lock(&md->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 (md->has_bc)
+		acx565akm_set_brightness(md, level);
+	else if (md->dssdev->set_backlight)
+		r = md->dssdev->set_backlight(md->dssdev, level);
+	else
+		r = -ENODEV;
+
+	mutex_unlock(&md->mutex);
+
+	return r;
+}
+
+static int acx565akm_bl_get_intensity(struct backlight_device *dev)
+{
+	struct acx565akm_device *md = dev_get_drvdata(&dev->dev);
+
+	dev_dbg(&dev->dev, "%s\n", __func__);
+
+	if (!md->has_bc && md->dssdev->set_backlight = NULL)
+		return -ENODEV;
+
+	if (dev->props.fb_blank = FB_BLANK_UNBLANK &&
+			dev->props.power = FB_BLANK_UNBLANK) {
+		if (md->has_bc)
+			return acx565akm_get_actual_brightness(md);
+		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 *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 acx565akm_device *md = dev_get_drvdata(dev);
+	const char *mode_str;
+	int mode;
+	int len;
+
+	if (!md->has_cabc)
+		mode = 0;
+	else
+		mode = get_cabc_mode(md);
+	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 acx565akm_device *md = 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 (!md->has_cabc && i != 0)
+		return -EINVAL;
+
+	mutex_lock(&md->mutex);
+	set_cabc_mode(md, i);
+	mutex_unlock(&md->mutex);
+
+	return count;
+}
+
+static ssize_t show_cabc_available_modes(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct acx565akm_device *md = dev_get_drvdata(dev);
+	int len;
+	int i;
+
+	if (!md->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,
+};
+
+
+/*---------------------------ACX Panel----------------------------*/
+
+static int acx_get_recommended_bpp(struct omap_dss_device *dssdev)
+{
+	return 16;
+}
+
+static struct omap_video_timings acx_panel_timings = {
+	.x_res		= 800,
+	.y_res		= 480,
+	.pixel_clock	= 24000,
+	.hfp		= 28,
+	.hsw		= 4,
+	.hbp		= 24,
+	.vfp		= 3,
+	.vsw		= 3,
+	.vbp		= 4,
+};
+
+static int acx_panel_probe(struct omap_dss_device *dssdev)
+{
+	int r;
+	struct acx565akm_device *md = &acx_dev;
+	struct backlight_device *bldev;
+	int max_brightness, brightness;
+	struct backlight_properties props;
+
+	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+					OMAP_DSS_LCD_IHS;
+	/* FIXME AC bias ? */
+	dssdev->panel.timings = acx_panel_timings;
+
+	if (dssdev->platform_enable)
+		dssdev->platform_enable(dssdev);
+	/*
+	 * After reset we have to wait 5 msec before the first
+	 * command can be sent.
+	 */
+	msleep(5);
+
+	md->enabled = panel_enabled(md);
+
+	r = panel_detect(md);
+	if (r) {
+		dev_err(&dssdev->dev, "%s panel detect error\n", __func__);
+		if (!md->enabled && dssdev->platform_disable)
+			dssdev->platform_disable(dssdev);
+		return r;
+	}
+
+	mutex_lock(&acx_dev.mutex);
+	acx_dev.dssdev = dssdev;
+	mutex_unlock(&acx_dev.mutex);
+
+	if (!md->enabled) {
+		if (dssdev->platform_disable)
+			dssdev->platform_disable(dssdev);
+	}
+
+	/*------- Backlight control --------*/
+
+	props.fb_blank = FB_BLANK_UNBLANK;
+	props.power = FB_BLANK_UNBLANK;
+
+	bldev = backlight_device_register("acx565akm", &md->spi->dev,
+			md, &acx565akm_bl_ops, &props);
+	md->bl_dev = bldev;
+	if (md->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__);
+			backlight_device_unregister(bldev);
+			return r;
+		}
+		md->cabc_mode = get_hw_cabc_mode(md);
+	}
+
+	if (md->has_bc)
+		max_brightness = 255;
+	else
+		max_brightness = dssdev->max_backlight_level;
+
+	if (md->has_bc)
+		brightness = acx565akm_get_actual_brightness(md);
+	else if (dssdev->get_backlight)
+		brightness = dssdev->get_backlight(dssdev);
+	else
+		brightness = 0;
+
+	bldev->props.max_brightness = max_brightness;
+	bldev->props.brightness = brightness;
+
+	acx565akm_bl_update_status(bldev);
+	return 0;
+}
+
+static void acx_panel_remove(struct omap_dss_device *dssdev)
+{
+	struct acx565akm_device *md = &acx_dev;
+
+	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	sysfs_remove_group(&md->bl_dev->dev.kobj, &bldev_attr_group);
+	backlight_device_unregister(md->bl_dev);
+	mutex_lock(&acx_dev.mutex);
+	acx_dev.dssdev = NULL;
+	mutex_unlock(&acx_dev.mutex);
+}
+
+static int acx_panel_power_on(struct omap_dss_device *dssdev)
+{
+	struct acx565akm_device *md = &acx_dev;
+	int r;
+
+	dev_dbg(&dssdev->dev, "%s\n", __func__);
+
+	mutex_lock(&md->mutex);
+
+	r = omapdss_sdi_display_enable(dssdev);
+	if (r) {
+		pr_err("%s sdi enable failed\n", __func__);
+		return r;
+	}
+
+	/*FIXME tweak me */
+	msleep(50);
+
+	if (dssdev->platform_enable) {
+		r = dssdev->platform_enable(dssdev);
+		if (r)
+			goto fail;
+	}
+
+	if (md->enabled) {
+		dev_dbg(&md->spi->dev, "panel already enabled\n");
+		mutex_unlock(&md->mutex);
+		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(md, 0);
+	md->enabled = 1;
+
+	/* 5msec between sleep out and the next command. (8.2.16) */
+	msleep(5);
+	set_display_state(md, 1);
+	set_cabc_mode(md, md->cabc_mode);
+
+	mutex_unlock(&md->mutex);
+
+	return acx565akm_bl_update_status(md->bl_dev);
+fail:
+	omapdss_sdi_display_disable(dssdev);
+	return r;
+}
+
+static void acx_panel_power_off(struct omap_dss_device *dssdev)
+{
+	struct acx565akm_device *md = &acx_dev;
+
+	dev_dbg(&dssdev->dev, "%s\n", __func__);
+
+	mutex_lock(&md->mutex);
+
+	if (!md->enabled) {
+		mutex_unlock(&md->mutex);
+		return;
+	}
+	set_display_state(md, 0);
+	set_sleep_mode(md, 1);
+	md->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 (dssdev->platform_disable)
+		dssdev->platform_disable(dssdev);
+
+	/* FIXME need to tweak this delay */
+	msleep(100);
+
+	omapdss_sdi_display_disable(dssdev);
+
+	mutex_unlock(&md->mutex);
+}
+
+static int acx_panel_enable(struct omap_dss_device *dssdev)
+{
+	int r;
+
+	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	r = acx_panel_power_on(dssdev);
+
+	if (r)
+		return r;
+
+	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+	return 0;
+}
+
+static void acx_panel_disable(struct omap_dss_device *dssdev)
+{
+	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	acx_panel_power_off(dssdev);
+	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static int acx_panel_suspend(struct omap_dss_device *dssdev)
+{
+	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	acx_panel_power_off(dssdev);
+	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+	return 0;
+}
+
+static int acx_panel_resume(struct omap_dss_device *dssdev)
+{
+	int r;
+
+	dev_dbg(&dssdev->dev, "%s\n", __func__);
+	r = acx_panel_power_on(dssdev);
+	if (r)
+		return r;
+
+	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+	return 0;
+}
+
+static void acx_panel_set_timings(struct omap_dss_device *dssdev,
+		struct omap_video_timings *timings)
+{
+	int r;
+
+	if (dssdev->state = OMAP_DSS_DISPLAY_ACTIVE)
+		omapdss_sdi_display_disable(dssdev);
+
+	dssdev->panel.timings = *timings;
+
+	if (dssdev->state = OMAP_DSS_DISPLAY_ACTIVE) {
+		r = omapdss_sdi_display_enable(dssdev);
+		if (r)
+			dev_err(&dssdev->dev, "%s enable failed\n", __func__);
+	}
+}
+
+static void acx_panel_get_timings(struct omap_dss_device *dssdev,
+		struct omap_video_timings *timings)
+{
+	*timings = dssdev->panel.timings;
+}
+
+static int acx_panel_check_timings(struct omap_dss_device *dssdev,
+		struct omap_video_timings *timings)
+{
+	return 0;
+}
+
+
+static struct omap_dss_driver acx_panel_driver = {
+	.probe		= acx_panel_probe,
+	.remove		= acx_panel_remove,
+
+	.enable		= acx_panel_enable,
+	.disable	= acx_panel_disable,
+	.suspend	= acx_panel_suspend,
+	.resume		= acx_panel_resume,
+
+	.set_timings	= acx_panel_set_timings,
+	.get_timings	= acx_panel_get_timings,
+	.check_timings	= acx_panel_check_timings,
+
+	.get_recommended_bpp = acx_get_recommended_bpp,
+
+	.driver         = {
+		.name   = "panel-acx565akm",
+		.owner  = THIS_MODULE,
+	},
+};
+
+/*--------------------SPI probe-------------------------*/
+
+static int acx565akm_spi_probe(struct spi_device *spi)
+{
+	struct acx565akm_device *md = &acx_dev;
+
+	dev_dbg(&spi->dev, "%s\n", __func__);
+
+	spi->mode = SPI_MODE_3;
+	md->spi = spi;
+	mutex_init(&md->mutex);
+	dev_set_drvdata(&spi->dev, md);
+
+	omap_dss_register_driver(&acx_panel_driver);
+
+	return 0;
+}
+
+static int acx565akm_spi_remove(struct spi_device *spi)
+{
+	struct acx565akm_device *md = dev_get_drvdata(&spi->dev);
+
+	dev_dbg(&md->spi->dev, "%s\n", __func__);
+	omap_dss_unregister_driver(&acx_panel_driver);
+
+	return 0;
+}
+
+static struct spi_driver acx565akm_spi_driver = {
+	.driver = {
+		.name	= "acx565akm",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe	= acx565akm_spi_probe,
+	.remove	= __devexit_p(acx565akm_spi_remove),
+};
+
+static int __init acx565akm_init(void)
+{
+	return spi_register_driver(&acx565akm_spi_driver);
+}
+
+static void __exit acx565akm_exit(void)
+{
+	spi_unregister_driver(&acx565akm_spi_driver);
+}
+
+module_init(acx565akm_init);
+module_exit(acx565akm_exit);
+
+MODULE_AUTHOR("Nokia Corporation");
+MODULE_DESCRIPTION("acx565akm LCD Driver");
+MODULE_LICENSE("GPL");
-- 
1.7.0.4