diff options
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/da8xx-fb.c | 43 |
1 files changed, 27 insertions, 16 deletions
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c index 8966274bbbb..eb95b893e8b 100644 --- a/drivers/video/da8xx-fb.c +++ b/drivers/video/da8xx-fb.c @@ -115,9 +115,11 @@ struct da8xx_fb_par { unsigned int databuf_sz; unsigned int palette_sz; unsigned int pxl_clk; + int blank; #ifdef CONFIG_CPU_FREQ struct notifier_block freq_transition; #endif + void (*panel_power_ctrl)(int); }; /* Variable Screen Information */ @@ -195,8 +197,18 @@ static struct da8xx_panel known_lcd_panels[] = { }, }; +/* Enable the Raster Engine of the LCD Controller */ +static inline void lcd_enable_raster(void) +{ + u32 reg; + + reg = lcdc_read(LCD_RASTER_CTRL_REG); + if (!(reg & LCD_RASTER_ENABLE)) + lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); +} + /* Disable the Raster Engine of the LCD Controller */ -static void lcd_disable_raster(struct da8xx_fb_par *par) +static inline void lcd_disable_raster(void) { u32 reg; @@ -448,8 +460,7 @@ static int fb_setcolreg(unsigned regno, unsigned red, unsigned green, static void lcd_reset(struct da8xx_fb_par *par) { /* Disable the Raster if previously Enabled */ - if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE) - lcd_disable_raster(par); + lcd_disable_raster(); /* DMA has to be disabled */ lcdc_write(0, LCD_DMA_CTRL_REG); @@ -529,13 +540,11 @@ static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg, static irqreturn_t lcdc_irq_handler(int irq, void *arg) { u32 stat = lcdc_read(LCD_STAT_REG); - u32 reg; if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) { - reg = lcdc_read(LCD_RASTER_CTRL_REG); - lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); + lcd_disable_raster(); lcdc_write(stat, LCD_STAT_REG); - lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); + lcd_enable_raster(); } else lcdc_write(stat, LCD_STAT_REG); @@ -595,16 +604,13 @@ static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb, unsigned long val, void *data) { struct da8xx_fb_par *par; - unsigned int reg; par = container_of(nb, struct da8xx_fb_par, freq_transition); if (val == CPUFREQ_PRECHANGE) { - reg = lcdc_read(LCD_RASTER_CTRL_REG); - lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); + lcd_disable_raster(); } else if (val == CPUFREQ_POSTCHANGE) { lcd_calc_clk_divider(par); - reg = lcdc_read(LCD_RASTER_CTRL_REG); - lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); + lcd_enable_raster(); } return 0; @@ -635,8 +641,10 @@ static int __devexit fb_remove(struct platform_device *dev) #ifdef CONFIG_CPU_FREQ lcd_da8xx_cpufreq_deregister(par); #endif - if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE) - lcd_disable_raster(par); + if (par->panel_power_ctrl) + par->panel_power_ctrl(0); + + lcd_disable_raster(); lcdc_write(0, LCD_RASTER_CTRL_REG); /* disable DMA */ @@ -777,6 +785,10 @@ static int __init fb_probe(struct platform_device *device) par = da8xx_fb_info->par; par->lcdc_clk = fb_clk; par->pxl_clk = lcdc_info->pxl_clk; + if (fb_pdata->panel_power_ctrl) { + par->panel_power_ctrl = fb_pdata->panel_power_ctrl; + par->panel_power_ctrl(1); + } if (lcd_init(par, lcd_cfg, lcdc_info) < 0) { dev_err(&device->dev, "lcd_init failed\n"); @@ -877,8 +889,7 @@ static int __init fb_probe(struct platform_device *device) #endif /* enable raster engine */ - lcdc_write(lcdc_read(LCD_RASTER_CTRL_REG) | - LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG); + lcd_enable_raster(); return 0; |