int medusa_set_brightness(struct cx25821_dev *dev, int brightness, int decoder)
{
int ret_val = 0;
int value = 0;
u32 val = 0, tmp = 0;
mutex_lock(&dev->lock);
if ((brightness > VIDEO_PROCAMP_MAX) ||
(brightness < VIDEO_PROCAMP_MIN)) {
mutex_unlock(&dev->lock);
return -1;
}
ret_val = mapM(VIDEO_PROCAMP_MIN, VIDEO_PROCAMP_MAX, brightness,
SIGNED_BYTE_MIN, SIGNED_BYTE_MAX, &value);
value = convert_to_twos(value, 8);
val = cx25821_i2c_read(&dev->i2c_bus[0],
VDEC_A_BRITE_CTRL + (0x200 * decoder), &tmp);
val &= 0xFFFFFF00;
ret_val |= cx25821_i2c_write(&dev->i2c_bus[0],
VDEC_A_BRITE_CTRL + (0x200 * decoder), val | value);
mutex_unlock(&dev->lock);
return ret_val;
}
int medusa_set_contrast(struct cx25821_dev *dev, int contrast, int decoder)
{
int ret_val = 0;
int value = 0;
u32 val = 0, tmp = 0;
mutex_lock(&dev->lock);
if ((contrast > VIDEO_PROCAMP_MAX) || (contrast < VIDEO_PROCAMP_MIN)) {
mutex_unlock(&dev->lock);
return -1;
}
ret_val = mapM(VIDEO_PROCAMP_MIN, VIDEO_PROCAMP_MAX, contrast,
UNSIGNED_BYTE_MIN, UNSIGNED_BYTE_MAX, &value);
val = cx25821_i2c_read(&dev->i2c_bus[0],
VDEC_A_CNTRST_CTRL + (0x200 * decoder), &tmp);
val &= 0xFFFFFF00;
ret_val |= cx25821_i2c_write(&dev->i2c_bus[0],
VDEC_A_CNTRST_CTRL + (0x200 * decoder), val | value);
mutex_unlock(&dev->lock);
return ret_val;
}