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Message-ID: <Y67tMN5+7vASplsE@pendragon.ideasonboard.com>
Date: Fri, 30 Dec 2022 15:52:48 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Ricardo Ribalda <ribalda@...omium.org>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
"hn.chen" <hn.chen@...plusit.com>, linux-media@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND v2 5/8] media: uvcvideo: Quirk for autosuspend in
Logi C910
Hi Ricardo,
Thank you for the patch.
s/C910/B910 and C910/ in the subject line.
On Fri, Dec 02, 2022 at 06:02:45PM +0100, Ricardo Ribalda wrote:
> Logitech C910 firmware is unable to recover from a usb autosuspend. When
s/C910/B910 and C910/
s/usb/USB/
> it resumes, the device is in a state where it only produces invalid
> frames. Eg:
>
> $ echo 0xFFFF > /sys/module/uvcvideo/parameters/trace # enable verbose log
> $ yavta -c1 -n1 --file='frame#.jpg' --format MJPEG --size=1920x1080 /dev/video1
Is this true for YUYV frames too ?
> [350438.435219] uvcvideo: uvc_v4l2_open
> [350438.529794] uvcvideo: Resuming interface 2
> [350438.529801] uvcvideo: Resuming interface 3
> [350438.529991] uvcvideo: Trying format 0x47504a4d (MJPG): 1920x1080.
> [350438.529996] uvcvideo: Using default frame interval 33333.3 us (30.0 fps).
> [350438.551496] uvcvideo: uvc_v4l2_mmap
> [350438.555890] uvcvideo: Device requested 3060 B/frame bandwidth.
> [350438.555896] uvcvideo: Selecting alternate setting 11 (3060 B/frame bandwidth).
> [350438.556362] uvcvideo: Allocated 5 URB buffers of 32x3060 bytes each.
> [350439.316468] uvcvideo: Marking buffer as bad (error bit set).
> [350439.316475] uvcvideo: Frame complete (EOF found).
> [350439.316477] uvcvideo: EOF in empty payload.
> [350439.316484] uvcvideo: frame 1 stats: 149/261/417 packets, 1/149/417 pts (early initial), 416/417 scr, last pts/stc/sof 2976325734/2978107243/249
> [350439.384510] uvcvideo: Marking buffer as bad (error bit set).
> [350439.384516] uvcvideo: Frame complete (EOF found).
> [350439.384518] uvcvideo: EOF in empty payload.
> [350439.384525] uvcvideo: frame 2 stats: 265/379/533 packets, 1/265/533 pts (early initial), 532/533 scr, last pts/stc/sof 2979524454/2981305193/316
> [350439.448472] uvcvideo: Marking buffer as bad (error bit set).
> [350439.448478] uvcvideo: Frame complete (EOF found).
> [350439.448480] uvcvideo: EOF in empty payload.
> [350439.448487] uvcvideo: frame 3 stats: 265/377/533 packets, 1/265/533 pts (early initial), 532/533 scr, last pts/stc/sof 2982723174/2984503144/382
> ...(loop)...
>
> The devices can leave this invalid state if its altstate is toggled.
s/its altstate/the alternate setting of the streaming interface/
How did you figure this out ?
> This patch addes a quirk for this device so it can be autosuspended
> properly.
>
> lsusb -v:
> Bus 001 Device 049: ID 046d:0821 Logitech, Inc. HD Webcam C910
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 2.00
> bDeviceClass 239 Miscellaneous Device
> bDeviceSubClass 2
> bDeviceProtocol 1 Interface Association
> bMaxPacketSize0 64
> idVendor 0x046d Logitech, Inc.
> idProduct 0x0821 HD Webcam C910
> bcdDevice 0.10
> iManufacturer 0
> iProduct 0
> iSerial 1 390022B0
> bNumConfigurations 1
>
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> ---
> drivers/media/usb/uvc/uvc_driver.c | 18 ++++++++++++++++++
> drivers/media/usb/uvc/uvc_video.c | 5 +++++
> drivers/media/usb/uvc/uvcvideo.h | 1 +
> 3 files changed, 24 insertions(+)
>
> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index 4512316c8748..d2a158a1ce35 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -2823,6 +2823,24 @@ static const struct usb_device_id uvc_ids[] = {
> .bInterfaceSubClass = 1,
> .bInterfaceProtocol = 0,
> .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax },
> + /* Logitech, Webcam C910 */
> + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> + | USB_DEVICE_ID_MATCH_INT_INFO,
> + .idVendor = 0x046d,
> + .idProduct = 0x0821,
> + .bInterfaceClass = USB_CLASS_VIDEO,
> + .bInterfaceSubClass = 1,
> + .bInterfaceProtocol = 0,
> + .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_WAKE_AUTOSUSPEND)},
> + /* Logitech, Webcam B910 */
> + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> + | USB_DEVICE_ID_MATCH_INT_INFO,
> + .idVendor = 0x046d,
> + .idProduct = 0x0823,
> + .bInterfaceClass = USB_CLASS_VIDEO,
> + .bInterfaceSubClass = 1,
> + .bInterfaceProtocol = 0,
> + .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_WAKE_AUTOSUSPEND)},
> /* Logitech Quickcam Fusion */
> { .match_flags = USB_DEVICE_ID_MATCH_DEVICE
> | USB_DEVICE_ID_MATCH_INT_INFO,
> diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
> index d387d6335344..75c32e232f5d 100644
> --- a/drivers/media/usb/uvc/uvc_video.c
> +++ b/drivers/media/usb/uvc/uvc_video.c
> @@ -1983,6 +1983,11 @@ static int uvc_video_start_transfer(struct uvc_streaming *stream,
> "Selecting alternate setting %u (%u B/frame bandwidth)\n",
> altsetting, best_psize);
>
Please add a comment to explain the issue.
> + if (stream->dev->quirks & UVC_QUIRK_WAKE_AUTOSUSPEND) {
> + usb_set_interface(stream->dev->udev, intfnum,
> + altsetting);
> + usb_set_interface(stream->dev->udev, intfnum, 0);
> + }
Missing blank line.
> ret = usb_set_interface(stream->dev->udev, intfnum, altsetting);
> if (ret < 0)
> return ret;
> diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
> index e41289605d0e..14daa7111953 100644
> --- a/drivers/media/usb/uvc/uvcvideo.h
> +++ b/drivers/media/usb/uvc/uvcvideo.h
> @@ -214,6 +214,7 @@
> #define UVC_QUIRK_FORCE_BPP 0x00001000
> #define UVC_QUIRK_IGNORE_EMPTY_TS 0x00002000
> #define UVC_QUIRK_INVALID_DEVICE_SOF 0x00004000
> +#define UVC_QUIRK_WAKE_AUTOSUSPEND 0x00008000
>
> /* Format flags */
> #define UVC_FMT_FLAG_COMPRESSED 0x00000001
>
--
Regards,
Laurent Pinchart
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