During sensors binding, there is a window where the sensor is switched
off, while there is a call it to set a new format, which can end up in
an access to the sensor, especially an I2C based sensor.
Remove this window by activating the sensor.
Signed-off-by: Robert Jarzmik <robert.jarz...@free.fr>
---
drivers/media/platform/pxa_camera.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/pxa_camera.c
b/drivers/media/platform/pxa_camera.c
index 2978cd6efa63..794c41d24d9f 100644
--- a/drivers/media/platform/pxa_camera.c
+++ b/drivers/media/platform/pxa_camera.c
@@ -2128,17 +2128,22 @@ static int pxa_camera_sensor_bound(struct
v4l2_async_notifier *notifier,
pix->bytesperline, pix->height);
pix->pixelformat = pcdev->current_fmt->host_fmt->fourcc;
v4l2_fill_mbus_format(mf, pix, pcdev->current_fmt->code);
- err = sensor_call(pcdev, pad, set_fmt, NULL, &format);
+
+ err = sensor_call(pcdev, core, s_power, 1);
if (err)
goto out;
+ err = sensor_call(pcdev, pad, set_fmt, NULL, &format);
+ if (err)
+ goto out_sensor_poweroff;
+
v4l2_fill_pix_format(pix, mf);
pr_info("%s(): colorspace=0x%x pixfmt=0x%x\n",
__func__, pix->colorspace, pix->pixelformat);
err = pxa_camera_init_videobuf2(pcdev);
if (err)
- goto out;
+ goto out_sensor_poweroff;
err = video_register_device(&pcdev->vdev, VFL_TYPE_GRABBER, -1);
if (err) {
@@ -2149,6 +2154,9 @@ static int pxa_camera_sensor_bound(struct
v4l2_async_notifier *notifier,
"PXA Camera driver attached to camera %s\n",
subdev->name);
}
+
+out_sensor_poweroff:
+ err = sensor_call(pcdev, core, s_power, 0);
out:
mutex_unlock(&pcdev->mlock);
return err;
--
2.1.4
--
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