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authorJacopo Mondi <jacopo@jmondi.org>2022-11-04 14:24:45 +0000
committerMauro Carvalho Chehab <mchehab@kernel.org>2022-11-25 08:43:22 +0000
commit114df30420e5a773e9b15411af5c5b7988f715fb (patch)
treef0557c9c34dd6c42f9ff1f2738913e1b7d5d4374 /drivers
parentf79101354cd8dd3f1cf298fcdf350525bcc2e187 (diff)
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media: ar0521: Add V4L2_CID_ANALOG_GAIN
Add support for V4L2_CID_ANALOG_GAIN. The control programs the global gain register which applies to all color channels. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/i2c/ar0521.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/media/i2c/ar0521.c b/drivers/media/i2c/ar0521.c
index 45fcf3798ad2..20a87dde2289 100644
--- a/drivers/media/i2c/ar0521.c
+++ b/drivers/media/i2c/ar0521.c
@@ -35,6 +35,11 @@
#define AR0521_HEIGHT_BLANKING_MIN 38u /* must be even */
#define AR0521_TOTAL_WIDTH_MIN 2968u
+#define AR0521_ANA_GAIN_MIN 0x00
+#define AR0521_ANA_GAIN_MAX 0x3f
+#define AR0521_ANA_GAIN_STEP 0x01
+#define AR0521_ANA_GAIN_DEFAULT 0x00
+
/* AR0521 registers */
#define AR0521_REG_VT_PIX_CLK_DIV 0x0300
#define AR0521_REG_FRAME_LENGTH_LINES 0x0340
@@ -50,6 +55,8 @@
#define AR0521_REG_RESET_RESTART BIT(1)
#define AR0521_REG_RESET_INIT BIT(0)
+#define AR0521_REG_ANA_GAIN_CODE_GLOBAL 0x3028
+
#define AR0521_REG_GREEN1_GAIN 0x3056
#define AR0521_REG_BLUE_GAIN 0x3058
#define AR0521_REG_RED_GAIN 0x305A
@@ -455,6 +462,10 @@ static int ar0521_s_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_VBLANK:
ret = ar0521_set_geometry(sensor);
break;
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = ar0521_write_reg(sensor, AR0521_REG_ANA_GAIN_CODE_GLOBAL,
+ ctrl->val);
+ break;
case V4L2_CID_GAIN:
case V4L2_CID_RED_BALANCE:
case V4L2_CID_BLUE_BALANCE:
@@ -498,6 +509,11 @@ static int ar0521_init_controls(struct ar0521_dev *sensor)
/* We can use our own mutex for the ctrl lock */
hdl->lock = &sensor->lock;
+ /* Analog gain */
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_ANALOGUE_GAIN,
+ AR0521_ANA_GAIN_MIN, AR0521_ANA_GAIN_MAX,
+ AR0521_ANA_GAIN_STEP, AR0521_ANA_GAIN_DEFAULT);
+
/* Manual gain */
ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 511, 1, 0);
ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,