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[media] m5mols: Add exposure bias control

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Add integer menu control for exposure bias. The control value range is
-2.0 EV to +2.0 EV, in 0.5 EV steps.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki 2012-03-06 07:10:00 -03:00 committed by Mauro Carvalho Chehab
parent d7a87e4cc3
commit 48311db676
2 changed files with 25 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/media/video/m5mols/m5mols.h
View File

@ -161,6 +161,7 @@ struct m5mols_version {
* @flags: state variable for the interrupt handler
* @handle: control handler
* @auto_exposure: auto/manual exposure control
* @exposure_bias: exposure compensation control
* @exposure: manual exposure control
* @auto_iso: auto/manual ISO sensitivity control
* @iso: manual ISO sensitivity control
@ -191,8 +192,9 @@ struct m5mols_info {
struct v4l2_ctrl_handler handle;
struct {
/* exposure/auto-exposure cluster */
/* exposure/exposure bias/auto exposure cluster */
struct v4l2_ctrl *auto_exposure;
struct v4l2_ctrl *exposure_bias;
struct v4l2_ctrl *exposure;
};
struct {

24
drivers/media/video/m5mols/m5mols_controls.c
View File

@ -241,6 +241,11 @@ static int m5mols_set_exposure(struct m5mols_info *info, int exposure)
ret = m5mols_write(sd, AE_MODE, REG_AE_ALL);
if (ret < 0)
return ret;
v4l2_dbg(1, m5mols_debug, sd, "%s: exposure bias: %#x\n",
__func__, info->exposure_bias->val);
return m5mols_write(sd, AE_INDEX, info->exposure_bias->val);
}
if (exposure == V4L2_EXPOSURE_MANUAL) {
@ -251,6 +256,9 @@ static int m5mols_set_exposure(struct m5mols_info *info, int exposure)
if (ret == 0)
ret = m5mols_write(sd, AE_MAN_GAIN_CAP,
info->exposure->val);
v4l2_dbg(1, m5mols_debug, sd, "%s: exposure: %#x\n",
__func__, info->exposure->val);
}
return ret;
@ -447,6 +455,12 @@ static const s64 iso_qmenu[] = {
50, 100, 200, 400, 800, 1600, 3200
};
/* Supported Exposure Bias values, -2.0EV...+2.0EV */
static const s64 ev_bias_qmenu[] = {
/* AE_INDEX: 0x00...0x08 */
-2000, -1500, -1000, -500, 0, 500, 1000, 1500, 2000
};
int m5mols_init_controls(struct v4l2_subdev *sd)
{
struct m5mols_info *info = to_m5mols(sd);
@ -467,6 +481,7 @@ int m5mols_init_controls(struct v4l2_subdev *sd)
&m5mols_ctrl_ops, V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
9, ~0x3fe, V4L2_WHITE_BALANCE_AUTO);
/* Exposure control cluster */
info->auto_exposure = v4l2_ctrl_new_std_menu(&info->handle,
&m5mols_ctrl_ops, V4L2_CID_EXPOSURE_AUTO,
1, ~0x03, V4L2_EXPOSURE_AUTO);
@ -475,6 +490,12 @@ int m5mols_init_controls(struct v4l2_subdev *sd)
&m5mols_ctrl_ops, V4L2_CID_EXPOSURE,
0, exposure_max, 1, exposure_max / 2);
info->exposure_bias = v4l2_ctrl_new_int_menu(&info->handle,
&m5mols_ctrl_ops, V4L2_CID_AUTO_EXPOSURE_BIAS,
ARRAY_SIZE(ev_bias_qmenu) - 1,
ARRAY_SIZE(ev_bias_qmenu)/2 - 1,
ev_bias_qmenu);
/* ISO control cluster */
info->auto_iso = v4l2_ctrl_new_std_menu(&info->handle, &m5mols_ctrl_ops,
V4L2_CID_ISO_SENSITIVITY_AUTO, 1, ~0x03, 1);
@ -499,8 +520,7 @@ int m5mols_init_controls(struct v4l2_subdev *sd)
return ret;
}
v4l2_ctrl_auto_cluster(2, &info->auto_exposure, 1, false);
v4l2_ctrl_auto_cluster(3, &info->auto_exposure, 1, false);
info->auto_iso->flags |= V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_UPDATE;
v4l2_ctrl_auto_cluster(2, &info->auto_iso, 0, false);