linux/drivers/video/omap2/displays/panel-taal.c
Tomi Valkeinen 8d8aa61dcf OMAP: DSS2: move set/get_mirror()
Move set/get_mirror() from omap_dss_device to omap_dss_driver.

This is part of a larger patch-set, which moves the control from omapdss
driver to the display driver.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
2010-02-24 14:31:27 +02:00

1021 lines
20 KiB
C

/*
* Taal DSI command mode panel
*
* Copyright (C) 2009 Nokia Corporation
* Author: Tomi Valkeinen <tomi.valkeinen@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/>.
*/
/*#define DEBUG*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <plat/display.h>
/* DSI Virtual channel. Hardcoded for now. */
#define TCH 0
#define DCS_READ_NUM_ERRORS 0x05
#define DCS_READ_POWER_MODE 0x0a
#define DCS_READ_MADCTL 0x0b
#define DCS_READ_PIXEL_FORMAT 0x0c
#define DCS_RDDSDR 0x0f
#define DCS_SLEEP_IN 0x10
#define DCS_SLEEP_OUT 0x11
#define DCS_DISPLAY_OFF 0x28
#define DCS_DISPLAY_ON 0x29
#define DCS_COLUMN_ADDR 0x2a
#define DCS_PAGE_ADDR 0x2b
#define DCS_MEMORY_WRITE 0x2c
#define DCS_TEAR_OFF 0x34
#define DCS_TEAR_ON 0x35
#define DCS_MEM_ACC_CTRL 0x36
#define DCS_PIXEL_FORMAT 0x3a
#define DCS_BRIGHTNESS 0x51
#define DCS_CTRL_DISPLAY 0x53
#define DCS_WRITE_CABC 0x55
#define DCS_READ_CABC 0x56
#define DCS_GET_ID1 0xda
#define DCS_GET_ID2 0xdb
#define DCS_GET_ID3 0xdc
/* #define TAAL_USE_ESD_CHECK */
#define TAAL_ESD_CHECK_PERIOD msecs_to_jiffies(5000)
struct taal_data {
struct backlight_device *bldev;
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 omap_dss_device *dssdev;
bool enabled;
u8 rotate;
bool mirror;
bool te_enabled;
bool use_ext_te;
struct completion te_completion;
bool use_dsi_bl;
bool cabc_broken;
unsigned cabc_mode;
bool intro_printed;
struct workqueue_struct *esd_wq;
struct delayed_work esd_work;
};
static void taal_esd_work(struct work_struct *work);
static void hw_guard_start(struct taal_data *td, int guard_msec)
{
td->hw_guard_wait = msecs_to_jiffies(guard_msec);
td->hw_guard_end = jiffies + td->hw_guard_wait;
}
static void hw_guard_wait(struct taal_data *td)
{
unsigned long wait = td->hw_guard_end - jiffies;
if ((long)wait > 0 && wait <= td->hw_guard_wait) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(wait);
}
}
static int taal_dcs_read_1(u8 dcs_cmd, u8 *data)
{
int r;
u8 buf[1];
r = dsi_vc_dcs_read(TCH, dcs_cmd, buf, 1);
if (r < 0)
return r;
*data = buf[0];
return 0;
}
static int taal_dcs_write_0(u8 dcs_cmd)
{
return dsi_vc_dcs_write(TCH, &dcs_cmd, 1);
}
static int taal_dcs_write_1(u8 dcs_cmd, u8 param)
{
u8 buf[2];
buf[0] = dcs_cmd;
buf[1] = param;
return dsi_vc_dcs_write(TCH, buf, 2);
}
static int taal_sleep_in(struct taal_data *td)
{
u8 cmd;
int r;
hw_guard_wait(td);
cmd = DCS_SLEEP_IN;
r = dsi_vc_dcs_write_nosync(TCH, &cmd, 1);
if (r)
return r;
hw_guard_start(td, 120);
msleep(5);
return 0;
}
static int taal_sleep_out(struct taal_data *td)
{
int r;
hw_guard_wait(td);
r = taal_dcs_write_0(DCS_SLEEP_OUT);
if (r)
return r;
hw_guard_start(td, 120);
msleep(5);
return 0;
}
static int taal_get_id(u8 *id1, u8 *id2, u8 *id3)
{
int r;
r = taal_dcs_read_1(DCS_GET_ID1, id1);
if (r)
return r;
r = taal_dcs_read_1(DCS_GET_ID2, id2);
if (r)
return r;
r = taal_dcs_read_1(DCS_GET_ID3, id3);
if (r)
return r;
return 0;
}
static int taal_set_addr_mode(u8 rotate, bool mirror)
{
int r;
u8 mode;
int b5, b6, b7;
r = taal_dcs_read_1(DCS_READ_MADCTL, &mode);
if (r)
return r;
switch (rotate) {
default:
case 0:
b7 = 0;
b6 = 0;
b5 = 0;
break;
case 1:
b7 = 0;
b6 = 1;
b5 = 1;
break;
case 2:
b7 = 1;
b6 = 1;
b5 = 0;
break;
case 3:
b7 = 1;
b6 = 0;
b5 = 1;
break;
}
if (mirror)
b6 = !b6;
mode &= ~((1<<7) | (1<<6) | (1<<5));
mode |= (b7 << 7) | (b6 << 6) | (b5 << 5);
return taal_dcs_write_1(DCS_MEM_ACC_CTRL, mode);
}
static int taal_set_update_window(u16 x, u16 y, u16 w, u16 h)
{
int r;
u16 x1 = x;
u16 x2 = x + w - 1;
u16 y1 = y;
u16 y2 = y + h - 1;
u8 buf[5];
buf[0] = DCS_COLUMN_ADDR;
buf[1] = (x1 >> 8) & 0xff;
buf[2] = (x1 >> 0) & 0xff;
buf[3] = (x2 >> 8) & 0xff;
buf[4] = (x2 >> 0) & 0xff;
r = dsi_vc_dcs_write_nosync(TCH, buf, sizeof(buf));
if (r)
return r;
buf[0] = DCS_PAGE_ADDR;
buf[1] = (y1 >> 8) & 0xff;
buf[2] = (y1 >> 0) & 0xff;
buf[3] = (y2 >> 8) & 0xff;
buf[4] = (y2 >> 0) & 0xff;
r = dsi_vc_dcs_write_nosync(TCH, buf, sizeof(buf));
if (r)
return r;
dsi_vc_send_bta_sync(TCH);
return r;
}
static int taal_bl_update_status(struct backlight_device *dev)
{
struct omap_dss_device *dssdev = dev_get_drvdata(&dev->dev);
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
int r;
int level;
if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
dev->props.power == FB_BLANK_UNBLANK)
level = dev->props.brightness;
else
level = 0;
dev_dbg(&dssdev->dev, "update brightness to %d\n", level);
if (td->use_dsi_bl) {
if (td->enabled) {
dsi_bus_lock();
r = taal_dcs_write_1(DCS_BRIGHTNESS, level);
dsi_bus_unlock();
if (r)
return r;
}
} else {
if (!dssdev->set_backlight)
return -EINVAL;
r = dssdev->set_backlight(dssdev, level);
if (r)
return r;
}
return 0;
}
static int taal_bl_get_intensity(struct backlight_device *dev)
{
if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
dev->props.power == FB_BLANK_UNBLANK)
return dev->props.brightness;
return 0;
}
static struct backlight_ops taal_bl_ops = {
.get_brightness = taal_bl_get_intensity,
.update_status = taal_bl_update_status,
};
static void taal_get_timings(struct omap_dss_device *dssdev,
struct omap_video_timings *timings)
{
*timings = dssdev->panel.timings;
}
static void taal_get_resolution(struct omap_dss_device *dssdev,
u16 *xres, u16 *yres)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
if (td->rotate == 0 || td->rotate == 2) {
*xres = dssdev->panel.timings.x_res;
*yres = dssdev->panel.timings.y_res;
} else {
*yres = dssdev->panel.timings.x_res;
*xres = dssdev->panel.timings.y_res;
}
}
static irqreturn_t taal_te_isr(int irq, void *data)
{
struct omap_dss_device *dssdev = data;
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
complete_all(&td->te_completion);
return IRQ_HANDLED;
}
static ssize_t taal_num_errors_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
u8 errors;
int r;
if (td->enabled) {
dsi_bus_lock();
r = taal_dcs_read_1(DCS_READ_NUM_ERRORS, &errors);
dsi_bus_unlock();
} else {
r = -ENODEV;
}
if (r)
return r;
return snprintf(buf, PAGE_SIZE, "%d\n", errors);
}
static ssize_t taal_hw_revision_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
u8 id1, id2, id3;
int r;
if (td->enabled) {
dsi_bus_lock();
r = taal_get_id(&id1, &id2, &id3);
dsi_bus_unlock();
} else {
r = -ENODEV;
}
if (r)
return r;
return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3);
}
static const char *cabc_modes[] = {
"off", /* used also always 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 omap_dss_device *dssdev = to_dss_device(dev);
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
const char *mode_str;
int mode;
int len;
mode = td->cabc_mode;
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 omap_dss_device *dssdev = to_dss_device(dev);
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
int i;
for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
if (sysfs_streq(cabc_modes[i], buf))
break;
}
if (i == ARRAY_SIZE(cabc_modes))
return -EINVAL;
if (td->enabled) {
dsi_bus_lock();
if (!td->cabc_broken)
taal_dcs_write_1(DCS_WRITE_CABC, i);
dsi_bus_unlock();
}
td->cabc_mode = i;
return count;
}
static ssize_t show_cabc_available_modes(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int len;
int i;
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(num_dsi_errors, S_IRUGO, taal_num_errors_show, NULL);
static DEVICE_ATTR(hw_revision, S_IRUGO, taal_hw_revision_show, NULL);
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 *taal_attrs[] = {
&dev_attr_num_dsi_errors.attr,
&dev_attr_hw_revision.attr,
&dev_attr_cabc_mode.attr,
&dev_attr_cabc_available_modes.attr,
NULL,
};
static struct attribute_group taal_attr_group = {
.attrs = taal_attrs,
};
static int taal_probe(struct omap_dss_device *dssdev)
{
struct taal_data *td;
struct backlight_device *bldev;
int r;
const struct omap_video_timings taal_panel_timings = {
.x_res = 864,
.y_res = 480,
};
dev_dbg(&dssdev->dev, "probe\n");
dssdev->panel.config = OMAP_DSS_LCD_TFT;
dssdev->panel.timings = taal_panel_timings;
dssdev->ctrl.pixel_size = 24;
td = kzalloc(sizeof(*td), GFP_KERNEL);
if (!td) {
r = -ENOMEM;
goto err0;
}
td->dssdev = dssdev;
td->esd_wq = create_singlethread_workqueue("taal_esd");
if (td->esd_wq == NULL) {
dev_err(&dssdev->dev, "can't create ESD workqueue\n");
r = -ENOMEM;
goto err1;
}
INIT_DELAYED_WORK_DEFERRABLE(&td->esd_work, taal_esd_work);
dev_set_drvdata(&dssdev->dev, td);
dssdev->get_timings = taal_get_timings;
dssdev->get_resolution = taal_get_resolution;
/* if no platform set_backlight() defined, presume DSI backlight
* control */
if (!dssdev->set_backlight)
td->use_dsi_bl = true;
bldev = backlight_device_register("taal", &dssdev->dev, dssdev,
&taal_bl_ops);
if (IS_ERR(bldev)) {
r = PTR_ERR(bldev);
goto err2;
}
td->bldev = bldev;
bldev->props.fb_blank = FB_BLANK_UNBLANK;
bldev->props.power = FB_BLANK_UNBLANK;
if (td->use_dsi_bl) {
bldev->props.max_brightness = 255;
bldev->props.brightness = 255;
} else {
bldev->props.max_brightness = 127;
bldev->props.brightness = 127;
}
taal_bl_update_status(bldev);
if (dssdev->phy.dsi.ext_te) {
int gpio = dssdev->phy.dsi.ext_te_gpio;
r = gpio_request(gpio, "taal irq");
if (r) {
dev_err(&dssdev->dev, "GPIO request failed\n");
goto err3;
}
gpio_direction_input(gpio);
r = request_irq(gpio_to_irq(gpio), taal_te_isr,
IRQF_DISABLED | IRQF_TRIGGER_RISING,
"taal vsync", dssdev);
if (r) {
dev_err(&dssdev->dev, "IRQ request failed\n");
gpio_free(gpio);
goto err3;
}
init_completion(&td->te_completion);
td->use_ext_te = true;
}
r = sysfs_create_group(&dssdev->dev.kobj, &taal_attr_group);
if (r) {
dev_err(&dssdev->dev, "failed to create sysfs files\n");
goto err4;
}
return 0;
err4:
if (td->use_ext_te) {
int gpio = dssdev->phy.dsi.ext_te_gpio;
free_irq(gpio_to_irq(gpio), dssdev);
gpio_free(gpio);
}
err3:
backlight_device_unregister(bldev);
err2:
cancel_delayed_work_sync(&td->esd_work);
destroy_workqueue(td->esd_wq);
err1:
kfree(td);
err0:
return r;
}
static void taal_remove(struct omap_dss_device *dssdev)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
struct backlight_device *bldev;
dev_dbg(&dssdev->dev, "remove\n");
sysfs_remove_group(&dssdev->dev.kobj, &taal_attr_group);
if (td->use_ext_te) {
int gpio = dssdev->phy.dsi.ext_te_gpio;
free_irq(gpio_to_irq(gpio), dssdev);
gpio_free(gpio);
}
bldev = td->bldev;
bldev->props.power = FB_BLANK_POWERDOWN;
taal_bl_update_status(bldev);
backlight_device_unregister(bldev);
cancel_delayed_work_sync(&td->esd_work);
destroy_workqueue(td->esd_wq);
kfree(td);
}
static int taal_enable(struct omap_dss_device *dssdev)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
u8 id1, id2, id3;
int r;
dev_dbg(&dssdev->dev, "enable\n");
if (dssdev->platform_enable) {
r = dssdev->platform_enable(dssdev);
if (r)
return r;
}
/* it seems we have to wait a bit until taal is ready */
msleep(5);
r = taal_sleep_out(td);
if (r)
goto err;
r = taal_get_id(&id1, &id2, &id3);
if (r)
goto err;
/* on early revisions CABC is broken */
if (id2 == 0x00 || id2 == 0xff || id2 == 0x81)
td->cabc_broken = true;
taal_dcs_write_1(DCS_BRIGHTNESS, 0xff);
taal_dcs_write_1(DCS_CTRL_DISPLAY, (1<<2) | (1<<5)); /* BL | BCTRL */
taal_dcs_write_1(DCS_PIXEL_FORMAT, 0x7); /* 24bit/pixel */
taal_set_addr_mode(td->rotate, td->mirror);
if (!td->cabc_broken)
taal_dcs_write_1(DCS_WRITE_CABC, td->cabc_mode);
taal_dcs_write_0(DCS_DISPLAY_ON);
#ifdef TAAL_USE_ESD_CHECK
queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
#endif
td->enabled = 1;
if (!td->intro_printed) {
dev_info(&dssdev->dev, "revision %02x.%02x.%02x\n",
id1, id2, id3);
if (td->cabc_broken)
dev_info(&dssdev->dev,
"old Taal version, CABC disabled\n");
td->intro_printed = true;
}
return 0;
err:
if (dssdev->platform_disable)
dssdev->platform_disable(dssdev);
return r;
}
static void taal_disable(struct omap_dss_device *dssdev)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
dev_dbg(&dssdev->dev, "disable\n");
cancel_delayed_work(&td->esd_work);
taal_dcs_write_0(DCS_DISPLAY_OFF);
taal_sleep_in(td);
/* wait a bit so that the message goes through */
msleep(10);
if (dssdev->platform_disable)
dssdev->platform_disable(dssdev);
td->enabled = 0;
}
static int taal_suspend(struct omap_dss_device *dssdev)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
struct backlight_device *bldev = td->bldev;
bldev->props.power = FB_BLANK_POWERDOWN;
taal_bl_update_status(bldev);
return 0;
}
static int taal_resume(struct omap_dss_device *dssdev)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
struct backlight_device *bldev = td->bldev;
bldev->props.power = FB_BLANK_UNBLANK;
taal_bl_update_status(bldev);
return 0;
}
static void taal_setup_update(struct omap_dss_device *dssdev,
u16 x, u16 y, u16 w, u16 h)
{
taal_set_update_window(x, y, w, h);
}
static int taal_enable_te(struct omap_dss_device *dssdev, bool enable)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
int r;
td->te_enabled = enable;
if (enable)
r = taal_dcs_write_1(DCS_TEAR_ON, 0);
else
r = taal_dcs_write_0(DCS_TEAR_OFF);
return r;
}
static int taal_wait_te(struct omap_dss_device *dssdev)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
long wait = msecs_to_jiffies(500);
if (!td->use_ext_te || !td->te_enabled)
return 0;
INIT_COMPLETION(td->te_completion);
wait = wait_for_completion_timeout(&td->te_completion, wait);
if (wait == 0) {
dev_err(&dssdev->dev, "timeout waiting TE\n");
return -ETIME;
}
return 0;
}
static int taal_rotate(struct omap_dss_device *dssdev, u8 rotate)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
int r;
dev_dbg(&dssdev->dev, "rotate %d\n", rotate);
if (td->enabled) {
r = taal_set_addr_mode(rotate, td->mirror);
if (r)
return r;
}
td->rotate = rotate;
return 0;
}
static u8 taal_get_rotate(struct omap_dss_device *dssdev)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
return td->rotate;
}
static int taal_mirror(struct omap_dss_device *dssdev, bool enable)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
int r;
dev_dbg(&dssdev->dev, "mirror %d\n", enable);
dsi_bus_lock();
if (td->enabled) {
r = taal_set_addr_mode(td->rotate, enable);
if (r)
goto err;
}
td->mirror = enable;
dsi_bus_unlock();
return 0;
err:
dsi_bus_unlock();
return r;
}
static bool taal_get_mirror(struct omap_dss_device *dssdev)
{
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
return td->mirror;
}
static int taal_run_test(struct omap_dss_device *dssdev, int test_num)
{
u8 id1, id2, id3;
int r;
dsi_bus_lock();
r = taal_dcs_read_1(DCS_GET_ID1, &id1);
if (r)
goto err;
r = taal_dcs_read_1(DCS_GET_ID2, &id2);
if (r)
goto err;
r = taal_dcs_read_1(DCS_GET_ID3, &id3);
if (r)
goto err;
dsi_bus_unlock();
return 0;
err:
dsi_bus_unlock();
return r;
}
static int taal_memory_read(struct omap_dss_device *dssdev,
void *buf, size_t size,
u16 x, u16 y, u16 w, u16 h)
{
int r;
int first = 1;
int plen;
unsigned buf_used = 0;
struct taal_data *td = dev_get_drvdata(&dssdev->dev);
if (!td->enabled)
return -ENODEV;
if (size < w * h * 3)
return -ENOMEM;
size = min(w * h * 3,
dssdev->panel.timings.x_res *
dssdev->panel.timings.y_res * 3);
dsi_bus_lock();
/* plen 1 or 2 goes into short packet. until checksum error is fixed,
* use short packets. plen 32 works, but bigger packets seem to cause
* an error. */
if (size % 2)
plen = 1;
else
plen = 2;
taal_set_update_window(x, y, w, h);
r = dsi_vc_set_max_rx_packet_size(TCH, plen);
if (r)
goto err0;
while (buf_used < size) {
u8 dcs_cmd = first ? 0x2e : 0x3e;
first = 0;
r = dsi_vc_dcs_read(TCH, dcs_cmd,
buf + buf_used, size - buf_used);
if (r < 0) {
dev_err(&dssdev->dev, "read error\n");
goto err;
}
buf_used += r;
if (r < plen) {
dev_err(&dssdev->dev, "short read\n");
break;
}
if (signal_pending(current)) {
dev_err(&dssdev->dev, "signal pending, "
"aborting memory read\n");
r = -ERESTARTSYS;
goto err;
}
}
r = buf_used;
err:
dsi_vc_set_max_rx_packet_size(TCH, 1);
err0:
dsi_bus_unlock();
return r;
}
static void taal_esd_work(struct work_struct *work)
{
struct taal_data *td = container_of(work, struct taal_data,
esd_work.work);
struct omap_dss_device *dssdev = td->dssdev;
u8 state1, state2;
int r;
if (!td->enabled)
return;
dsi_bus_lock();
r = taal_dcs_read_1(DCS_RDDSDR, &state1);
if (r) {
dev_err(&dssdev->dev, "failed to read Taal status\n");
goto err;
}
/* Run self diagnostics */
r = taal_sleep_out(td);
if (r) {
dev_err(&dssdev->dev, "failed to run Taal self-diagnostics\n");
goto err;
}
r = taal_dcs_read_1(DCS_RDDSDR, &state2);
if (r) {
dev_err(&dssdev->dev, "failed to read Taal status\n");
goto err;
}
/* Each sleep out command will trigger a self diagnostic and flip
* Bit6 if the test passes.
*/
if (!((state1 ^ state2) & (1 << 6))) {
dev_err(&dssdev->dev, "LCD self diagnostics failed\n");
goto err;
}
/* Self-diagnostics result is also shown on TE GPIO line. We need
* to re-enable TE after self diagnostics */
if (td->use_ext_te && td->te_enabled)
taal_enable_te(dssdev, true);
dsi_bus_unlock();
queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
return;
err:
dev_err(&dssdev->dev, "performing LCD reset\n");
taal_disable(dssdev);
taal_enable(dssdev);
dsi_bus_unlock();
queue_delayed_work(td->esd_wq, &td->esd_work, TAAL_ESD_CHECK_PERIOD);
}
static struct omap_dss_driver taal_driver = {
.probe = taal_probe,
.remove = taal_remove,
.enable = taal_enable,
.disable = taal_disable,
.suspend = taal_suspend,
.resume = taal_resume,
.setup_update = taal_setup_update,
.enable_te = taal_enable_te,
.wait_for_te = taal_wait_te,
.set_rotate = taal_rotate,
.get_rotate = taal_get_rotate,
.set_mirror = taal_mirror,
.get_mirror = taal_get_mirror,
.run_test = taal_run_test,
.memory_read = taal_memory_read,
.driver = {
.name = "taal",
.owner = THIS_MODULE,
},
};
static int __init taal_init(void)
{
omap_dss_register_driver(&taal_driver);
return 0;
}
static void __exit taal_exit(void)
{
omap_dss_unregister_driver(&taal_driver);
}
module_init(taal_init);
module_exit(taal_exit);
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
MODULE_DESCRIPTION("Taal Driver");
MODULE_LICENSE("GPL");