media: ov2740: change the minimal exposure value to 4

The minimal valid exposure value should be 4 lines instead of 8 for
ov2740 mannual exposure control.

Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/i2c/ov2740.c b/drivers/media/i2c/ov2740.c
index 0d32b0c..64ecb69 100644 (file)
--- a/drivers/media/i2c/ov2740.c
+++ b/drivers/media/i2c/ov2740.c
@@ -37,7 +37,7 @@
 
 /* Exposure controls from sensor */
 #define OV2740_REG_EXPOSURE            0x3500
-#define OV2740_EXPOSURE_MIN            8
+#define OV2740_EXPOSURE_MIN            4
 #define OV2740_EXPOSURE_MAX_MARGIN     8
 #define OV2740_EXPOSURE_STEP           1