diff options
Diffstat (limited to 'drivers/media/i2c/ov2740.c')
| -rw-r--r-- | drivers/media/i2c/ov2740.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/drivers/media/i2c/ov2740.c b/drivers/media/i2c/ov2740.c index 599369a3d192..934c9d65cb09 100644 --- a/drivers/media/i2c/ov2740.c +++ b/drivers/media/i2c/ov2740.c @@ -51,7 +51,7 @@ #define OV2740_REG_MWB_R_GAIN 0x500a #define OV2740_REG_MWB_G_GAIN 0x500c #define OV2740_REG_MWB_B_GAIN 0x500e -#define OV2740_DGTL_GAIN_MIN 0 +#define OV2740_DGTL_GAIN_MIN 1024 #define OV2740_DGTL_GAIN_MAX 4095 #define OV2740_DGTL_GAIN_STEP 1 #define OV2740_DGTL_GAIN_DEFAULT 1024 @@ -61,6 +61,12 @@ #define OV2740_TEST_PATTERN_ENABLE BIT(7) #define OV2740_TEST_PATTERN_BAR_SHIFT 2 +/* Group Access */ +#define OV2740_REG_GROUP_ACCESS 0x3208 +#define OV2740_GROUP_HOLD_START 0x0 +#define OV2740_GROUP_HOLD_END 0x10 +#define OV2740_GROUP_HOLD_LAUNCH 0xa0 + /* ISP CTRL00 */ #define OV2740_REG_ISP_CTRL00 0x5000 /* ISP CTRL01 */ @@ -438,6 +444,11 @@ static int ov2740_update_digital_gain(struct ov2740 *ov2740, u32 d_gain) { int ret = 0; + ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1, + OV2740_GROUP_HOLD_START); + if (ret) + return ret; + ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_R_GAIN, 2, d_gain); if (ret) return ret; @@ -446,7 +457,18 @@ static int ov2740_update_digital_gain(struct ov2740 *ov2740, u32 d_gain) if (ret) return ret; - return ov2740_write_reg(ov2740, OV2740_REG_MWB_B_GAIN, 2, d_gain); + ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_B_GAIN, 2, d_gain); + if (ret) + return ret; + + ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1, + OV2740_GROUP_HOLD_END); + if (ret) + return ret; + + ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1, + OV2740_GROUP_HOLD_LAUNCH); + return ret; } static int ov2740_test_pattern(struct ov2740 *ov2740, u32 pattern) |