18016e35d4
If we blank the panel by echo 1 > /sys/devices/platform/omapfb/graphics/fb0/blank Then, we reboot the sytem, the kernel will crash at drivers/video/omap2/dss/core.c:323 This is because the panel is closed twice. Now check the state of a dssdev to forbid a panel is power on or power off twice. Signed-off-by: Stanley.Miao <stanley.miao@windriver.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
165 lines
3.4 KiB
C
165 lines
3.4 KiB
C
/*
|
|
* LCD panel driver for Sharp LQ043T1DG01
|
|
*
|
|
* Copyright (C) 2009 Texas Instruments Inc
|
|
* Author: Vaibhav Hiremath <hvaibhav@ti.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/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
|
|
#include <plat/display.h>
|
|
|
|
static struct omap_video_timings sharp_lq_timings = {
|
|
.x_res = 480,
|
|
.y_res = 272,
|
|
|
|
.pixel_clock = 9000,
|
|
|
|
.hsw = 42,
|
|
.hfp = 3,
|
|
.hbp = 2,
|
|
|
|
.vsw = 11,
|
|
.vfp = 3,
|
|
.vbp = 2,
|
|
};
|
|
|
|
static int sharp_lq_panel_power_on(struct omap_dss_device *dssdev)
|
|
{
|
|
int r;
|
|
|
|
if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
|
|
return 0;
|
|
|
|
r = omapdss_dpi_display_enable(dssdev);
|
|
if (r)
|
|
goto err0;
|
|
|
|
/* wait couple of vsyncs until enabling the LCD */
|
|
msleep(50);
|
|
|
|
if (dssdev->platform_enable) {
|
|
r = dssdev->platform_enable(dssdev);
|
|
if (r)
|
|
goto err1;
|
|
}
|
|
|
|
return 0;
|
|
err1:
|
|
omapdss_dpi_display_disable(dssdev);
|
|
err0:
|
|
return r;
|
|
}
|
|
|
|
static void sharp_lq_panel_power_off(struct omap_dss_device *dssdev)
|
|
{
|
|
if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
|
|
return;
|
|
|
|
if (dssdev->platform_disable)
|
|
dssdev->platform_disable(dssdev);
|
|
|
|
/* wait at least 5 vsyncs after disabling the LCD */
|
|
msleep(100);
|
|
|
|
omapdss_dpi_display_disable(dssdev);
|
|
}
|
|
|
|
static int sharp_lq_panel_probe(struct omap_dss_device *dssdev)
|
|
{
|
|
|
|
dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
|
|
OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IEO;
|
|
dssdev->panel.acb = 0x0;
|
|
dssdev->panel.timings = sharp_lq_timings;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sharp_lq_panel_remove(struct omap_dss_device *dssdev)
|
|
{
|
|
}
|
|
|
|
static int sharp_lq_panel_enable(struct omap_dss_device *dssdev)
|
|
{
|
|
int r = 0;
|
|
|
|
r = sharp_lq_panel_power_on(dssdev);
|
|
if (r)
|
|
return r;
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sharp_lq_panel_disable(struct omap_dss_device *dssdev)
|
|
{
|
|
sharp_lq_panel_power_off(dssdev);
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
|
|
}
|
|
|
|
static int sharp_lq_panel_suspend(struct omap_dss_device *dssdev)
|
|
{
|
|
sharp_lq_panel_power_off(dssdev);
|
|
dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
|
|
return 0;
|
|
}
|
|
|
|
static int sharp_lq_panel_resume(struct omap_dss_device *dssdev)
|
|
{
|
|
int r = 0;
|
|
|
|
r = sharp_lq_panel_power_on(dssdev);
|
|
if (r)
|
|
return r;
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct omap_dss_driver sharp_lq_driver = {
|
|
.probe = sharp_lq_panel_probe,
|
|
.remove = sharp_lq_panel_remove,
|
|
|
|
.enable = sharp_lq_panel_enable,
|
|
.disable = sharp_lq_panel_disable,
|
|
.suspend = sharp_lq_panel_suspend,
|
|
.resume = sharp_lq_panel_resume,
|
|
|
|
.driver = {
|
|
.name = "sharp_lq_panel",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init sharp_lq_panel_drv_init(void)
|
|
{
|
|
return omap_dss_register_driver(&sharp_lq_driver);
|
|
}
|
|
|
|
static void __exit sharp_lq_panel_drv_exit(void)
|
|
{
|
|
omap_dss_unregister_driver(&sharp_lq_driver);
|
|
}
|
|
|
|
module_init(sharp_lq_panel_drv_init);
|
|
module_exit(sharp_lq_panel_drv_exit);
|
|
MODULE_LICENSE("GPL");
|