diff options
| author | Akinobu Mita <akinobu.mita@gmail.com> | 2019-03-18 11:25:43 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-03-29 10:44:47 -0400 |
| commit | c4b50cabd6a2c018c5b388392cce4d842d15ad86 (patch) | |
| tree | 955083dbc92230c31d7efeee51804d3721d41467 /drivers | |
| parent | 05fa38fd63e557d2681b063f053c5b94d9c442e3 (diff) | |
media: ov7740: enable to get exposure control in autoexposure mode
The exposure control is clustered with the autoexposure control and
flagged as volatile, but the g_volatile_ctrl() doesn't handle
V4L2_CID_EXPOSURE_AUTO. So, the value of the exposure control can't be
read in autoexposure mode.
This enables to get the exposure control in autoexposure mode by making
ov7740_get_volatile_ctrl() deal with V4L2_CID_EXPOSURE_AUTO.
This also sets the exposure control as volatile by specifying the
argument to v4l2_ctrl_auto_cluster() instead of manually flagging it.
Cc: Wenyou Yang <wenyou.yang@microchip.com>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/i2c/ov7740.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/drivers/media/i2c/ov7740.c b/drivers/media/i2c/ov7740.c index dfece91ce96b..54e80a60aa57 100644 --- a/drivers/media/i2c/ov7740.c +++ b/drivers/media/i2c/ov7740.c @@ -448,6 +448,27 @@ static int ov7740_get_gain(struct ov7740 *ov7740, struct v4l2_ctrl *ctrl) return 0; } +static int ov7740_get_exp(struct ov7740 *ov7740, struct v4l2_ctrl *ctrl) +{ + struct regmap *regmap = ov7740->regmap; + unsigned int value0, value1; + int ret; + + if (ctrl->val == V4L2_EXPOSURE_MANUAL) + return 0; + + ret = regmap_read(regmap, REG_AEC, &value0); + if (ret) + return ret; + ret = regmap_read(regmap, REG_HAEC, &value1); + if (ret) + return ret; + + ov7740->exposure->val = (value1 << 8) | (value0 & 0xff); + + return 0; +} + static int ov7740_set_exp(struct regmap *regmap, int value) { int ret; @@ -494,6 +515,9 @@ static int ov7740_get_volatile_ctrl(struct v4l2_ctrl *ctrl) case V4L2_CID_AUTOGAIN: ret = ov7740_get_gain(ov7740, ctrl); break; + case V4L2_CID_EXPOSURE_AUTO: + ret = ov7740_get_exp(ov7740, ctrl); + break; default: ret = -EINVAL; break; @@ -991,8 +1015,6 @@ static int ov7740_init_controls(struct ov7740 *ov7740) ov7740->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops, V4L2_CID_EXPOSURE, 0, 65535, 1, 500); - if (ov7740->exposure) - ov7740->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE; ov7740->auto_exposure = v4l2_ctrl_new_std_menu(ctrl_hdlr, &ov7740_ctrl_ops, @@ -1003,7 +1025,7 @@ static int ov7740_init_controls(struct ov7740 *ov7740) v4l2_ctrl_auto_cluster(3, &ov7740->auto_wb, 0, false); v4l2_ctrl_auto_cluster(2, &ov7740->auto_gain, 0, true); v4l2_ctrl_auto_cluster(2, &ov7740->auto_exposure, - V4L2_EXPOSURE_MANUAL, false); + V4L2_EXPOSURE_MANUAL, true); v4l2_ctrl_cluster(2, &ov7740->hflip); if (ctrl_hdlr->error) { |