Hi Laurent
On Fri, 18 Aug 2023 at 10:15, Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
>
> Hi Ricardo,
>
> Thank you for the patch.
>
> On Thu, Aug 17, 2023 at 12:38:04PM +0000, Ricardo Ribalda wrote:
> > The device does not implement the control properly.
> >
> > Fixes vl2-compliance error:
> >
> > info: checking control 'Power Line Frequency' (0x00980918)
> > fail: v4l2-test-controls.cpp(552): could not set valid menu item 3
> >
> > Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
> > ---
> > This camera, like other Chicony devices, do not implement properly the
> > Power Line Frequency control.
> >
> > This time, I do not have direct access to the device, just to the
> > report, but since other devices from the same family are showing the
> > same error, it is safe to assume that the same fix will work here.
>
> Why, ô why does UVC not provide a way to query this dynamically ? :-( Of
> course, even if it did, I'm sure vendors would get it wrong... It sounds
> like the Windows UVC compliance test suite must be a joke.
>
> > ---
> > drivers/media/usb/uvc/uvc_driver.c | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> > index 08fcd2ffa727..db2556e95b72 100644
> > --- a/drivers/media/usb/uvc/uvc_driver.c
> > +++ b/drivers/media/usb/uvc/uvc_driver.c
> > @@ -2592,6 +2592,15 @@ static const struct usb_device_id uvc_ids[] = {
> > .bInterfaceSubClass = 1,
> > .bInterfaceProtocol = 0,
> > .driver_info = (kernel_ulong_t)&uvc_ctrl_power_line_limited },
> > + /* Chicony Electronics Co., Ltd */
>
> I'll write
>
> /* Chicony Electronics Co., Ltd Integrated Camera */
>
> as that's what the descriptors expose. Is this integrated in a
> chromebook by any chance ? If so, could you share which model the camera
> is found in, and can I add that to the comment ?
It is a non-chromebook running ChromeOS Flex.
https://chromeenterprise.google/os/chromeosflex/
I believe it is a thinkpad, but I am not sure the exact model.
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
>
> > + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> > + | USB_DEVICE_ID_MATCH_INT_INFO,
> > + .idVendor = 0x04f2,
> > + .idProduct = 0xb67c,
> > + .bInterfaceClass = USB_CLASS_VIDEO,
> > + .bInterfaceSubClass = 1,
> > + .bInterfaceProtocol = 0,
> > + .driver_info = (kernel_ulong_t)&uvc_ctrl_power_line_limited },
> > /* Chicony EasyCamera */
> > { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> > | USB_DEVICE_ID_MATCH_INT_INFO,
> >
> > ---
> > base-commit: 4853c74bd7ab7fdb83f319bd9ace8a08c031e9b6
> > change-id: 20230817-chicony-9c35f2046c6f
>
> --
> Regards,
>
> Laurent Pinchart
--
Ricardo Ribalda
