shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-09 12:17:12 +09:00
Code Issues Packages Projects Releases Wiki Activity

rk3066b lcdc:dynamic gating lcdc clk

Browse Source
This commit is contained in:
yxj
2013-05-22 10:35:54 +08:00
parent 9083a453cc
commit 4e54eccb78
1 changed files with 56 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
drivers/video/rockchip/lcdc/rk3066b_lcdc.c
View File

@@ -44,6 +44,43 @@ module_param(dbg_thresd, int, S_IRUGO|S_IWUSR);
#define DBG(level,x...) do { if(unlikely(dbg_thresd >= level)) printk(KERN_INFO x); } while (0)
static int rk3066b_lcdc_clk_enable(struct rk3066b_lcdc_device *lcdc_dev)
{
clk_enable(lcdc_dev->hclk);
clk_enable(lcdc_dev->dclk);
clk_enable(lcdc_dev->aclk);
clk_enable(lcdc_dev->pd);
spin_lock(&lcdc_dev->reg_lock);
lcdc_dev->clk_on = 1;
spin_unlock(&lcdc_dev->reg_lock);
printk("rk3066b lcdc%d clk enable...\n",lcdc_dev->id);
return 0;
}
static int rk3066b_lcdc_clk_disable(struct rk3066b_lcdc_device *lcdc_dev)
{
spin_lock(&lcdc_dev->reg_lock);
lcdc_dev->clk_on = 0;
spin_unlock(&lcdc_dev->reg_lock);
mdelay(25);
clk_disable(lcdc_dev->dclk);
clk_disable(lcdc_dev->hclk);
clk_disable(lcdc_dev->aclk);
clk_disable(lcdc_dev->pd);
printk("rk3066b lcdc%d clk disable...\n",lcdc_dev->id);
return 0;
}
static int rk3066b_lcdc_reg_resume(struct rk3066b_lcdc_device *lcdc_dev)
{
memcpy((u8*)lcdc_dev->preg, (u8*)&lcdc_dev->regbak, 0x9C);
return 0;
}
static int init_rk3066b_lcdc(struct rk_lcdc_device_driver *dev_drv)
{
struct rk3066b_lcdc_device *lcdc_dev = container_of(dev_drv,struct rk3066b_lcdc_device,driver);
@@ -72,12 +109,9 @@ static int init_rk3066b_lcdc(struct rk_lcdc_device_driver *dev_drv)
{
printk(KERN_ERR "failed to get lcdc%d clk source\n",lcdc_dev->id);
}
clk_enable(lcdc_dev->pd);
clk_enable(lcdc_dev->hclk); //enable aclk and hclk for register config
clk_enable(lcdc_dev->aclk);
clk_enable(lcdc_dev->dclk);
lcdc_dev->clk_on = 1;
rk3066b_lcdc_clk_enable(lcdc_dev);
if(lcdc_dev->id == 0)
{
#if defined(CONFIG_RK3066B_LCDC0_IO_18V)
@@ -140,6 +174,8 @@ static int init_rk3066b_lcdc(struct rk_lcdc_device_driver *dev_drv)
v_SCANNING_MASK(1)); //mask all interrupt in init
LcdMskReg(lcdc_dev,FIFO_WATER_MARK,m_WIN1_FIFO_FULL_LEVEL,v_WIN1_FIFO_FULL_LEVEL(0x1e0));
//LCDC_REG_CFG_DONE(); // write any value to REG_CFG_DONE let config become effective
rk3066b_lcdc_clk_disable(lcdc_dev);
return 0;
}
@@ -563,8 +599,11 @@ static int rk3066b_lcdc_open(struct rk_lcdc_device_driver *dev_drv,int layer_id,
{
struct rk3066b_lcdc_device *lcdc_dev = container_of(dev_drv,struct rk3066b_lcdc_device,driver);
if(open)
if((open) && (!lcdc_dev->atv_layer_cnt)) //enable clk,when first layer open
{
rk3066b_lcdc_clk_enable(lcdc_dev);
rk3066b_lcdc_reg_resume(lcdc_dev); //resume reg
LcdMskReg(lcdc_dev, SYS_CFG,m_LCDC_STANDBY,v_LCDC_STANDBY(0));
rk3066b_load_screen(dev_drv,1);
}
if(layer_id == 0)
@@ -575,7 +614,14 @@ static int rk3066b_lcdc_open(struct rk_lcdc_device_driver *dev_drv,int layer_id,
{
win1_open(lcdc_dev,open);
}
if((!open) && (!lcdc_dev->atv_layer_cnt)) //when all layer closed,disable clk
{
LcdMskReg(lcdc_dev, INT_STATUS, m_FRM_STARTCLEAR, v_FRM_STARTCLEAR(1));
LcdMskReg(lcdc_dev, SYS_CFG,m_LCDC_STANDBY,v_LCDC_STANDBY(1));
LCDC_REG_CFG_DONE();
rk3066b_lcdc_clk_disable(lcdc_dev);
}
return 0;
}
@@ -1030,6 +1076,9 @@ int rk3066b_lcdc_early_resume(struct rk_lcdc_device_driver *dev_drv)
lcdc_dev->clk_on = 1;
spin_unlock(&lcdc_dev->reg_lock);
if(!lcdc_dev->atv_layer_cnt)
rk3066b_lcdc_clk_disable(lcdc_dev);
if(dev_drv->screen0->standby)
dev_drv->screen0->standby(0); //screen wake up