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lcd: nt35510: faster resume

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This commit is contained in:
黄涛
2011-08-12 12:09:25 +08:00
parent b91b35b8b0
commit a2f46f0db3
1 changed files with 63 additions and 28 deletions
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91
drivers/video/display/screen/lcd_nt35510.c
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@@ -1,5 +1,6 @@
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/earlysuspend.h>
#include "../../rk29_fb.h"
#include <mach/gpio.h>
#include <mach/iomux.h>
@@ -317,7 +318,7 @@ void WriteParameter(char DH)
void init_nt35510(void)
{
WriteCommand(0X1100);
msleep(10);
usleep_range(10*1000, 10*1000);
WriteCommand(0X1300);
@@ -1431,11 +1432,11 @@ else if(OUT_FACE == OUT_P666)
WriteCommand(0X2000); //
WriteCommand(0X1100);
msleep(120);
usleep_range(120*1000, 120*1000);
WriteCommand(0X2900);
msleep(100);
usleep_range(100*1000, 100*1000);
WriteCommand(0X2C00);
}
@@ -1586,6 +1587,49 @@ else if(OUT_FACE == OUT_P666)
WriteCommand(0X2C00);
}
static DEFINE_MUTEX(lcd_mutex);
extern void rk29_lcd_spim_spin_lock(void);
extern void rk29_lcd_spim_spin_unlock(void);
static void lcd_resume(struct work_struct *work)
{
mutex_lock(&lcd_mutex);
rk29_lcd_spim_spin_lock();
if(gLcd_info)
gLcd_info->io_init();
gpio_request(RK29_PIN6_PC6, NULL);
gpio_direction_output(RK29_PIN6_PC6, 1);
gpio_direction_output(RK29_PIN6_PC6, 0);
usleep_range(5*1000, 5*1000);
gpio_set_value(RK29_PIN6_PC6, 1);
usleep_range(50*1000, 50*1000);
gpio_free(RK29_PIN6_PC6);
init_nt35510();
//set_backlight(255);
//resume_nt35510();//may be fail to wake up LCD some time,so change to init lcd again
printk(KERN_DEBUG "%s\n",__FUNCTION__);
if(gLcd_info)
gLcd_info->io_deinit();
rk29_lcd_spim_spin_unlock();
mutex_unlock(&lcd_mutex);
}
static DECLARE_WORK(lcd_resume_work, lcd_resume);
static struct workqueue_struct *lcd_resume_wq;
static void lcd_late_resume(struct early_suspend *h)
{
queue_work(lcd_resume_wq, &lcd_resume_work);
}
static struct early_suspend lcd_early_suspend_desc = {
.level = EARLY_SUSPEND_LEVEL_DISABLE_FB + 1, // before fb resume
.resume = lcd_late_resume,
};
int init(void)
{
volatile u32 data;
@@ -1608,43 +1652,34 @@ int init(void)
//set_backlight(255);
lcd_resume_wq = create_singlethread_workqueue("lcd");
register_early_suspend(&lcd_early_suspend_desc);
return 0;
}
extern void rk29_lcd_spim_spin_lock(void);
extern void rk29_lcd_spim_spin_unlock(void);
int standby(u8 enable) //***enable =1 means suspend, 0 means resume
{
rk29_lcd_spim_spin_lock();
if(gLcd_info)
gLcd_info->io_init();
if (enable) {
mutex_lock(&lcd_mutex);
rk29_lcd_spim_spin_lock();
if(gLcd_info)
gLcd_info->io_init();
if(enable) {
WriteCommand(0X2800);
//set_backlight(0);
WriteCommand(0X1100);
msleep(5);
WriteCommand(0X4f00);
WriteParameter(0x01);
} else {
gpio_request(RK29_PIN6_PC6, NULL);
gpio_direction_output(RK29_PIN6_PC6, 1);
gpio_direction_output(RK29_PIN6_PC6, 0);
msleep(5);
gpio_set_value(RK29_PIN6_PC6, 1);
msleep(50);
gpio_free(RK29_PIN6_PC6);
init_nt35510();
//set_backlight(255);
//resume_nt35510();//may be fail to wake up LCD some time,so change to init lcd again
printk("%s\n",__FUNCTION__);
if(gLcd_info)
gLcd_info->io_deinit();
rk29_lcd_spim_spin_unlock();
mutex_unlock(&lcd_mutex);
} else {
flush_workqueue(lcd_resume_wq);
}
if(gLcd_info)
gLcd_info->io_deinit();
rk29_lcd_spim_spin_unlock();
return 0;
return 0;
}