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add comment for some key fucntion

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This commit is contained in:
yxj
2012-12-01 15:12:28 +08:00
parent 02541026a1
commit e6a80df673
1 changed files with 20 additions and 1 deletions
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21
drivers/video/rockchip/rk_fb.c
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@@ -657,6 +657,14 @@ void rk_direct_fb_show(struct fb_info * fbi)
EXPORT_SYMBOL(rk_direct_fb_show);
/******************************************
function:this function will be called by hdmi,when
hdmi plug in/out
screen: the screen attached to hdmi
enable: 1,hdmi plug in,0,hdmi plug out
lcdc_id: the lcdc id the hdmi attached ,0 or 1
******************************************/
int rk_fb_switch_screen(rk_screen *screen ,int enable ,int lcdc_id)
{
struct rk_fb_inf *inf = platform_get_drvdata(g_fb_pdev);
@@ -700,7 +708,7 @@ int rk_fb_switch_screen(rk_screen *screen ,int enable ,int lcdc_id)
}
else if((lcdc_id == 1)&&(inf->num_lcdc == 2))
{
info = inf->fb[dev_drv->num_layer]; //the main fb of lcdc2
info = inf->fb[dev_drv->num_layer]; //the main fb of lcdc1
}
if(dev_drv->screen1) //device like rk2928 ,have only one lcdc but two outputs
@@ -814,6 +822,17 @@ int rk_fb_switch_screen(rk_screen *screen ,int enable ,int lcdc_id)
}
/******************************************
function:this function current only called by hdmi for
scale the display
scale_x: scale rate of x resolution
scale_y: scale rate of y resolution
lcdc_id: the lcdc id the hdmi attached ,0 or 1
******************************************/
int rk_fb_disp_scale(u8 scale_x, u8 scale_y,u8 lcdc_id)
{
struct rk_fb_inf *inf = platform_get_drvdata(g_fb_pdev);