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rk fb: delay 200ms when extern display switch screen can fix mmu pagefault

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This commit is contained in:
hjc
2015-05-06 15:56:58 +08:00
parent 9943c5b12d
commit 7bb02ff83e
1 changed files with 4 additions and 0 deletions
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4
drivers/video/rockchip/rk_fb.c
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@@ -2671,6 +2671,7 @@ static int rk_fb_blank(int blank_mode, struct fb_info *info)
win_id = dev_drv->ops->fb_get_win_id(dev_drv, fix->id);
if (win_id < 0)
return -ENODEV;
mutex_lock(&dev_drv->switch_screen);
#if defined(CONFIG_RK_HDMI)
if ((rk_fb->disp_mode == ONE_DUAL) &&
(hdmi_get_hotplug() == HDMI_HPD_ACTIVED)) {
@@ -2680,6 +2681,7 @@ static int rk_fb_blank(int blank_mode, struct fb_info *info)
{
dev_drv->ops->blank(dev_drv, win_id, blank_mode);
}
mutex_unlock(&dev_drv->switch_screen);
return 0;
}
@@ -3223,6 +3225,8 @@ int rk_fb_switch_screen(struct rk_screen *screen, int enable, int lcdc_id)
mutex_lock(&dev_drv->switch_screen);
hdmi_switch_state = 0;
dev_drv->hdmi_switch = 1;
if (!dev_drv->uboot_logo)
mdelay(200);
envp[0] = "switch screen";
envp[1] = kmalloc(32, GFP_KERNEL);