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backlight: Support VGA/QVGA mode switching in tosa_lcd 

LCD driver on tosa requires reprogramming TG after mode
switching. Add support for switching to QVGA mode.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Dmitry Baryshkov 2008-12-04 16:54:42 +00:00 committed by Richard Purdie
parent 9a2c61a921
commit 0ec561f4b6
1 changed files with 25 additions and 2 deletions
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27
drivers/video/backlight/tosa_lcd.c
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@ -39,6 +39,7 @@ struct tosa_lcd_data {
struct i2c_client *i2c;
int lcd_power;
bool is_vga;
};
static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data)
@ -81,8 +82,12 @@ static void tosa_lcd_tg_init(struct tosa_lcd_data *data)
static void tosa_lcd_tg_on(struct tosa_lcd_data *data)
{
struct spi_device *spi = data->spi;
const int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR;
tosa_tg_send(spi, TG_PNLCTL, value | TG_REG0_VQV); /* this depends on mode */
int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR;
if (data->is_vga)
value |= TG_REG0_VQV;
tosa_tg_send(spi, TG_PNLCTL, value);
/* TG LCD pannel power up */
tosa_tg_send(spi, TG_PINICTL,0x4);
@ -142,9 +147,25 @@ static int tosa_lcd_get_power(struct lcd_device *lcd)
return data->lcd_power;
}
static int tosa_lcd_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
{
struct tosa_lcd_data *data = lcd_get_data(lcd);
if (mode->xres == 320 || mode->yres == 320)
data->is_vga = false;
else
data->is_vga = true;
if (POWER_IS_ON(data->lcd_power))
tosa_lcd_tg_on(data);
return 0;
}
static struct lcd_ops tosa_lcd_ops = {
.set_power = tosa_lcd_set_power,
.get_power = tosa_lcd_get_power,
.set_mode = tosa_lcd_set_mode,
};
static int __devinit tosa_lcd_probe(struct spi_device *spi)
@ -156,6 +177,8 @@ static int __devinit tosa_lcd_probe(struct spi_device *spi)
if (!data)
return -ENOMEM;
data->is_vga = true; /* defaut to VGA mode */
/*
* bits_per_word cannot be configured in platform data
*/