V4L/DVB (12536): soc-camera: remove .gain and .exposure struct soc_camera_device members
This makes the soc-camera interface for V4L2 subdevices thinner yet. Handle
gain and exposure internally in each driver just like all other controls.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
index 4b39479..45388d2 100644
--- a/drivers/media/video/mt9m001.c
+++ b/drivers/media/video/mt9m001.c
@@ -80,6 +80,8 @@
struct v4l2_rect rect; /* Sensor window */
__u32 fourcc;
int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
+ unsigned int gain;
+ unsigned int exposure;
unsigned char autoexposure;
};
@@ -129,8 +131,8 @@
dev_dbg(&client->dev, "%s\n", __func__);
/*
- * We don't know, whether platform provides reset,
- * issue a soft reset too
+ * We don't know, whether platform provides reset, issue a soft reset
+ * too. This returns all registers to their default values.
*/
ret = reg_write(client, MT9M001_RESET, 1);
if (!ret)
@@ -200,6 +202,7 @@
struct soc_camera_device *icd = client->dev.platform_data;
int ret;
const u16 hblank = 9, vblank = 25;
+ unsigned int total_h;
if (mt9m001->fourcc == V4L2_PIX_FMT_SBGGR8 ||
mt9m001->fourcc == V4L2_PIX_FMT_SBGGR16)
@@ -219,6 +222,8 @@
soc_camera_limit_side(&rect.top, &rect.height,
MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT);
+ total_h = rect.height + icd->y_skip_top + vblank;
+
/* Blanking and start values - default... */
ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
if (!ret)
@@ -236,15 +241,13 @@
ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
rect.height + icd->y_skip_top - 1);
if (!ret && mt9m001->autoexposure) {
- ret = reg_write(client, MT9M001_SHUTTER_WIDTH,
- rect.height + icd->y_skip_top + vblank);
+ ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h);
if (!ret) {
const struct v4l2_queryctrl *qctrl =
soc_camera_find_qctrl(icd->ops,
V4L2_CID_EXPOSURE);
- icd->exposure = (524 + (rect.height + icd->y_skip_top +
- vblank - 1) *
- (qctrl->maximum - qctrl->minimum)) /
+ mt9m001->exposure = (524 + (total_h - 1) *
+ (qctrl->maximum - qctrl->minimum)) /
1048 + qctrl->minimum;
}
}
@@ -457,6 +460,12 @@
case V4L2_CID_EXPOSURE_AUTO:
ctrl->value = mt9m001->autoexposure;
break;
+ case V4L2_CID_GAIN:
+ ctrl->value = mt9m001->gain;
+ break;
+ case V4L2_CID_EXPOSURE:
+ ctrl->value = mt9m001->exposure;
+ break;
}
return 0;
}
@@ -518,7 +527,7 @@
}
/* Success */
- icd->gain = ctrl->value;
+ mt9m001->gain = ctrl->value;
break;
case V4L2_CID_EXPOSURE:
/* mt9m001 has maximum == default */
@@ -535,21 +544,21 @@
shutter);
if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0)
return -EIO;
- icd->exposure = ctrl->value;
+ mt9m001->exposure = ctrl->value;
mt9m001->autoexposure = 0;
}
break;
case V4L2_CID_EXPOSURE_AUTO:
if (ctrl->value) {
const u16 vblank = 25;
+ unsigned int total_h = mt9m001->rect.height +
+ icd->y_skip_top + vblank;
if (reg_write(client, MT9M001_SHUTTER_WIDTH,
- mt9m001->rect.height +
- icd->y_skip_top + vblank) < 0)
+ total_h) < 0)
return -EIO;
qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
- icd->exposure = (524 + (mt9m001->rect.height +
- icd->y_skip_top + vblank - 1) *
- (qctrl->maximum - qctrl->minimum)) /
+ mt9m001->exposure = (524 + (total_h - 1) *
+ (qctrl->maximum - qctrl->minimum)) /
1048 + qctrl->minimum;
mt9m001->autoexposure = 1;
} else
@@ -629,6 +638,10 @@
if (ret < 0)
dev_err(&client->dev, "Failed to initialise the camera\n");
+ /* mt9m001_init() has reset the chip, returning registers to defaults */
+ mt9m001->gain = 64;
+ mt9m001->exposure = 255;
+
return ret;
}
@@ -701,7 +714,7 @@
/* Second stage probe - when a capture adapter is there */
icd->ops = &mt9m001_ops;
- icd->y_skip_top = 1;
+ icd->y_skip_top = 0;
mt9m001->rect.left = MT9M001_COLUMN_SKIP;
mt9m001->rect.top = MT9M001_ROW_SKIP;
