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rk30 lcdc: add vysnc support

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This commit is contained in:
yxj
2013-01-30 10:57:32 +08:00
parent 2d9594c2e9
commit 747ee2a75d
2 changed files with 60 additions and 1 deletions
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59
drivers/video/rockchip/lcdc/rk30_lcdc.c
View File

@@ -30,6 +30,8 @@
#include <linux/earlysuspend.h>
#include <asm/div64.h>
#include <asm/uaccess.h>
#include <linux/kthread.h>
#include "rk30_lcdc.h"
@@ -906,6 +908,7 @@ int rk30_lcdc_ioctl(struct rk_lcdc_device_driver * dev_drv,unsigned int cmd, uns
u32 panel_size[2];
void __user *argp = (void __user *)arg;
int ret = 0;
int enable;
switch(cmd)
{
case FBIOGET_PANEL_SIZE: //get panel size
@@ -914,6 +917,11 @@ int rk30_lcdc_ioctl(struct rk_lcdc_device_driver * dev_drv,unsigned int cmd, uns
if(copy_to_user(argp, panel_size, 8))
return -EFAULT;
break;
case RK_FBIOSET_VSYNC_ENABLE:
if (copy_from_user(&enable, argp, sizeof(enable)))
return -EFAULT;
lcdc_dev->vsync_info.active = enable;
break;
default:
break;
}
@@ -1387,9 +1395,39 @@ int rk30_lcdc_early_resume(struct rk_lcdc_device_driver *dev_drv)
return 0;
}
static int lcdc_wait_for_vsync_thread(void *data)
{
struct rk30_lcdc_device *lcdc_dev = data;
while (!kthread_should_stop()) {
ktime_t timestamp = lcdc_dev->vsync_info.timestamp;
int ret = wait_event_interruptible(lcdc_dev->vsync_info.wait,
!ktime_equal(timestamp, lcdc_dev->vsync_info.timestamp) &&
lcdc_dev->vsync_info.active);
if (!ret) {
sysfs_notify(&lcdc_dev->driver.dev->kobj, NULL, "vsync");
}
}
return 0;
}
static ssize_t rk30_lcdc_vsync_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct rk30_lcdc_device *lcdc_dev = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%llu\n",
ktime_to_ns(lcdc_dev->vsync_info.timestamp));
}
static DEVICE_ATTR(vsync, S_IRUGO, rk30_lcdc_vsync_show, NULL);
static irqreturn_t rk30_lcdc_isr(int irq, void *dev_id)
{
struct rk30_lcdc_device *lcdc_dev = (struct rk30_lcdc_device *)dev_id;
ktime_t timestamp = ktime_get();
lcdc_msk_reg(lcdc_dev, INT_STATUS, m_FRM_START_INT_CLEAR, v_FRM_START_INT_CLEAR(1));
lcdc_cfg_done(lcdc_dev);
@@ -1401,6 +1439,10 @@ static irqreturn_t rk30_lcdc_isr(int irq, void *dev_id)
complete(&(lcdc_dev->driver.frame_done));
spin_unlock(&(lcdc_dev->driver.cpl_lock));
}
lcdc_dev->vsync_info.timestamp = timestamp;
wake_up_interruptible_all(&lcdc_dev->vsync_info.wait);
return IRQ_HANDLED;
}
@@ -1557,7 +1599,22 @@ static int __devinit rk30_lcdc_probe (struct platform_device *pdev)
ret = -ENODEV;
goto err4;
}
init_waitqueue_head(&lcdc_dev->vsync_info.wait);
ret = device_create_file(&pdev->dev, &dev_attr_vsync);
if (ret) {
dev_err(&pdev->dev, "failed to create vsync file\n");
}
lcdc_dev->vsync_info.thread = kthread_run(lcdc_wait_for_vsync_thread,
lcdc_dev, "lcdc-vsync");
if (lcdc_dev->vsync_info.thread == ERR_PTR(-ENOMEM)) {
dev_err(&pdev->dev, "failed to run vsync thread\n");
lcdc_dev->vsync_info.thread = NULL;
}
lcdc_dev->vsync_info.active = 1;
ret = rk_fb_register(&(lcdc_dev->driver),&lcdc_driver,lcdc_dev->id);
if(ret < 0)
{

2
drivers/video/rockchip/lcdc/rk30_lcdc.h
View File

@@ -590,6 +590,8 @@ struct rk30_lcdc_device{
bool clk_on; //if aclk or hclk is closed ,acess to register is not allowed
u8 atv_layer_cnt; //active layer counter,when atv_layer_cnt = 0,disable lcdc
struct rk_fb_vsync vsync_info;
unsigned int irq;
struct clk *pd; //lcdc power domain