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rk2928 lcdc:switch lcdc io to gpio mode in suspend to avoid current leakage

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This commit is contained in:
yxj 2012-09-12 17:06:39 +08:00
parent 97e126c514
commit 56ba543ffc
2 changed files with 91 additions and 5 deletions
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91
drivers/video/rockchip/lcdc/rk2928_lcdc.c
View File

@ -31,6 +31,7 @@
#include <asm/div64.h>
#include <asm/uaccess.h>
#include <mach/iomux.h>
#include <mach/gpio.h>
#include "rk2928_lcdc.h"
#include "../lvds/rk_lvds.h"
@ -43,6 +44,82 @@ 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)
//rk2928 lcdc iomux,mode:0,gpio,1 lcdc io
static int rk2928_lcdc_iomux(rk_screen *screen,int mode)
{
int ret = 0;
int i=0;
if((screen->type == SCREEN_RGB)&&(mode)) //iomux for RGB screen
{
if(screen->lcdc_id == 0)
{
rk30_mux_api_set(GPIO2B0_LCDC0_DCLK_LCDC1_DCLK_NAME, GPIO2B_LCDC0_DCLK);
rk30_mux_api_set(GPIO2B1_LCDC0_HSYNC_LCDC1_HSYNC_NAME, GPIO2B_LCDC0_HSYNC);
rk30_mux_api_set(GPIO2B2_LCDC0_VSYNC_LCDC1_VSYNC_NAME, GPIO2B_LCDC0_VSYNC);
rk30_mux_api_set(GPIO2B3_LCDC0_DEN_LCDC1_DEN_NAME, GPIO2B_LCDC0_DEN);
rk30_mux_api_set(GPIO2B4_LCDC0_D10_LCDC1_D10_NAME, GPIO2B_LCDC0_D10);
rk30_mux_api_set(GPIO2B5_LCDC0_D11_LCDC1_D11_NAME, GPIO2B_LCDC0_D11);
rk30_mux_api_set(GPIO2B6_LCDC0_D12_LCDC1_D12_NAME, GPIO2B_LCDC0_D12);
rk30_mux_api_set(GPIO2B7_LCDC0_D13_LCDC1_D13_NAME, GPIO2B_LCDC0_D13);
rk30_mux_api_set(GPIO2C0_LCDC0_D14_LCDC1_D14_NAME, GPIO2C_LCDC0_D14);
rk30_mux_api_set(GPIO2C1_LCDC0_D15_LCDC1_D15_NAME, GPIO2C_LCDC0_D15);
rk30_mux_api_set(GPIO2C2_LCDC0_D16_LCDC1_D16_NAME, GPIO2C_LCDC0_D16);
rk30_mux_api_set(GPIO2C3_LCDC0_D17_LCDC1_D17_NAME, GPIO2C_LCDC0_D17);
}
else if(screen->lcdc_id == 1)
{
rk30_mux_api_set(GPIO2B0_LCDC0_DCLK_LCDC1_DCLK_NAME, GPIO2B_LCDC1_DCLK);
rk30_mux_api_set(GPIO2B1_LCDC0_HSYNC_LCDC1_HSYNC_NAME, GPIO2B_LCDC1_HSYNC);
rk30_mux_api_set(GPIO2B2_LCDC0_VSYNC_LCDC1_VSYNC_NAME, GPIO2B_LCDC1_VSYNC);
rk30_mux_api_set(GPIO2B3_LCDC0_DEN_LCDC1_DEN_NAME, GPIO2B_LCDC1_DEN);
rk30_mux_api_set(GPIO2B4_LCDC0_D10_LCDC1_D10_NAME, GPIO2B_LCDC1_D10);
rk30_mux_api_set(GPIO2B5_LCDC0_D11_LCDC1_D11_NAME, GPIO2B_LCDC1_D11);
rk30_mux_api_set(GPIO2B6_LCDC0_D12_LCDC1_D12_NAME, GPIO2B_LCDC1_D12);
rk30_mux_api_set(GPIO2B7_LCDC0_D13_LCDC1_D13_NAME, GPIO2B_LCDC1_D13);
rk30_mux_api_set(GPIO2C0_LCDC0_D14_LCDC1_D14_NAME, GPIO2C_LCDC1_D14);
rk30_mux_api_set(GPIO2C1_LCDC0_D15_LCDC1_D15_NAME, GPIO2C_LCDC1_D15);
rk30_mux_api_set(GPIO2C2_LCDC0_D16_LCDC1_D16_NAME, GPIO2C_LCDC1_D16);
rk30_mux_api_set(GPIO2C3_LCDC0_D17_LCDC1_D17_NAME, GPIO2C_LCDC1_D17);
}
else
{
printk(KERN_WARNING "%s>>>no such interface:%d\n",__func__,screen->lcdc_id);
return -1;
}
}
else if((screen->type == SCREEN_RGB)&&(!mode))
{
rk30_mux_api_set(GPIO2B0_LCDC0_DCLK_LCDC1_DCLK_NAME, GPIO2B_GPIO2B0 );
rk30_mux_api_set(GPIO2B1_LCDC0_HSYNC_LCDC1_HSYNC_NAME,GPIO2B_GPIO2B1);
rk30_mux_api_set(GPIO2B2_LCDC0_VSYNC_LCDC1_VSYNC_NAME, GPIO2B_GPIO2B2);
rk30_mux_api_set(GPIO2B3_LCDC0_DEN_LCDC1_DEN_NAME, GPIO2B_GPIO2B3);
rk30_mux_api_set(GPIO2B4_LCDC0_D10_LCDC1_D10_NAME, GPIO2B_GPIO2B4 );
rk30_mux_api_set(GPIO2B5_LCDC0_D11_LCDC1_D11_NAME, GPIO2B_GPIO2B5 );
rk30_mux_api_set(GPIO2B6_LCDC0_D12_LCDC1_D12_NAME, GPIO2B_GPIO2B6 );
rk30_mux_api_set(GPIO2B7_LCDC0_D13_LCDC1_D13_NAME, GPIO2B_GPIO2B7 );
rk30_mux_api_set(GPIO2C0_LCDC0_D14_LCDC1_D14_NAME, GPIO2C_GPIO2C0);
rk30_mux_api_set(GPIO2C1_LCDC0_D15_LCDC1_D15_NAME, GPIO2C_GPIO2C1);
rk30_mux_api_set(GPIO2C2_LCDC0_D16_LCDC1_D16_NAME, GPIO2C_GPIO2C2);
rk30_mux_api_set(GPIO2C3_LCDC0_D17_LCDC1_D17_NAME, GPIO2C_GPIO2C3);
for(i=0;i<8;i++)
{
ret += gpio_request(RK2928_PIN2_PB0 + i, NULL);
gpio_direction_output(RK2928_PIN2_PB0 + i, 0);
}
for(i=0;i<4;i++)
{
ret += gpio_request(RK2928_PIN2_PC0 + i, NULL);
gpio_direction_output(RK2928_PIN2_PC0 + i, 0);
}
if(ret < 0)
{
printk("%s:some gpio request fail\n",__func__);
}
}
return 0;
}
static int init_rk2928_lcdc(struct rk_lcdc_device_driver *dev_drv)
{
struct rk2928_lcdc_device *lcdc_dev = container_of(dev_drv,struct rk2928_lcdc_device,driver);
@ -245,7 +322,7 @@ static int rk2928_load_screen(struct rk_lcdc_device_driver *dev_drv, bool initsc
}
else
{
printk(KERN_WARNING "%s>>>no such interface:%d\n",dev_drv->cur_screen->lcdc_id);
printk(KERN_WARNING "%s>>>no such interface:%d\n",__func__,dev_drv->cur_screen->lcdc_id);
return -1;
}
@ -837,7 +914,9 @@ int rk2928_lcdc_early_suspend(struct rk_lcdc_device_driver *dev_drv)
{
lcdc_dev->clk_on = 0;
LcdMskReg(lcdc_dev, INT_STATUS, m_FRM_START_INT_CLEAR, v_FRM_START_INT_CLEAR(1));
LcdSetBit(lcdc_dev, SYS_CFG,m_LCDC_STANDBY);
LcdSetBit(lcdc_dev,DSP_CTRL,m_BLACK_MODE);
LcdMskReg(lcdc_dev, SYS_CFG,m_DSP_OUT_ZERO | m_LCDC_STANDBY,
v_DSP_OUT_ZERO(1) | v_LCDC_STANDBY(1));
LCDC_REG_CFG_DONE();
spin_unlock(&lcdc_dev->reg_lock);
}
@ -848,7 +927,8 @@ int rk2928_lcdc_early_suspend(struct rk_lcdc_device_driver *dev_drv)
}
mdelay(1);
mdelay(10);
rk2928_lcdc_iomux(dev_drv->screen0,0); //switch to gpio mode,to avoid current leakage
clk_disable(lcdc_dev->dclk);
clk_disable(lcdc_dev->hclk);
clk_disable(lcdc_dev->aclk);
@ -869,12 +949,15 @@ int rk2928_lcdc_early_resume(struct rk_lcdc_device_driver *dev_drv)
clk_enable(lcdc_dev->dclk);
clk_enable(lcdc_dev->aclk);
}
rk2928_lcdc_iomux(dev_drv->screen0,1); //switch to lcdc io
memcpy((u8*)lcdc_dev->preg, (u8*)&lcdc_dev->regbak, 0xc4); //resume reg
spin_lock(&lcdc_dev->reg_lock);
if(lcdc_dev->atv_layer_cnt)
{
LcdClrBit(lcdc_dev, SYS_CFG,m_LCDC_STANDBY);
LcdMskReg(lcdc_dev, SYS_CFG,m_DSP_OUT_ZERO | m_LCDC_STANDBY,
v_DSP_OUT_ZERO(0) | v_LCDC_STANDBY(0));
LcdClrBit(lcdc_dev,DSP_CTRL,m_BLACK_MODE);
LCDC_REG_CFG_DONE();
}
lcdc_dev->clk_on = 1;

5
drivers/video/rockchip/lcdc/rk2928_lcdc.h
View File

@ -77,6 +77,7 @@ typedef volatile struct tagLCDC_REG
#define m_LCDC_STANDBY (1<<22)
#define m_LCDC_AXICLK_AUTO_ENABLE (1<<24) //eanble for low power
#define m_DSP_OUT_ZERO (1<<25)
#define v_W0_EN(x) (((x)&1)<<0)
#define v_W1_EN(x) (((x)&1)<<1)
@ -86,6 +87,8 @@ typedef volatile struct tagLCDC_REG
#define v_LCDC_STANDBY(x) (((x)&1)<<22)
#define v_LCDC_AXICLK_AUTO_ENABLE(x) (((x)&1)<<24)
#define v_DSP_OUT_ZERO(x) (((x)&1)<<25)
#define v_LCDC_DMA_STOP(x) (((x)&1)<<0)
#define v_HWC_RELOAD_EN(x) (((x)&1)<<2)
@ -138,7 +141,7 @@ typedef volatile struct tagLCDC_REG
#define v_DISPLAY_FORMAT(x) (((x)&0x3)<<0)
#define v_BLANK_MODE(x) (((x)&1)<<2)
#define v_BLACK_MODE(x) (((x)&1)<<2)
#define v_BLACK_MODE(x) (((x)&1)<<3)
#define v_HSYNC_POLARITY(x) (((x)&1)<<4)
#define v_VSYNC_POLARITY(x) (((x)&1)<<5)
#define v_DEN_POLARITY(x) (((x)&1)<<6)