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Commit 0ec561f4 authored by Dmitry Eremin-Solenikov's avatar Dmitry Eremin-Solenikov Committed by Richard Purdie
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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: default avatarDmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: default avatarRichard Purdie <rpurdie@linux.intel.com>
parent 9a2c61a9

drivers/video/backlight/tosa_lcd.c

+25 −2
Original line number Diff line number Diff line
@@ -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

	 */