From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f200.google.com (mail-oi1-f200.google.com [209.85.167.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1AAFE392C20 for ; Mon, 3 Aug 2026 06:58:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785740310; cv=none; b=pniCAITGW3iYqOH6lJlQPGUikV6tPBIQa+7GZ9GFB8aV1tMGKI2+/x+arNOLNYZMXJaTIWA+w46wgF9NpMAT2C/AECK6lju1qBsNw+w94dow98STAmoAv+pRTIWb/OQkCPdePzwtagrKQJxS03Kzg0fk8TG/xviAAgg1CCEuzvs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785740310; c=relaxed/simple; bh=On28LPNyT0wHYK1eiiih84TylpPEl11SClJhfwLcI+I=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=bVjGCwNtW8mIgS3vHck3rAAEbHWKf//QmVFD/aYfhhgKc5FsGfN0o4US9pJS4+mYVH+ikMPMu50Is7k8drBY4lKCRD3vvGgNCGWQdxjmAzGD/atqaAdPjRN8B+Cp9k8Bjj18vgIlHxS6gLho9dxkSEwqA5Sv9w2+OozIJ83yrsA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--yunkec.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=hA+V6W8W; arc=none smtp.client-ip=209.85.167.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--yunkec.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="hA+V6W8W" Received: by mail-oi1-f200.google.com with SMTP id 5614622812f47-49d4cb3ca23so4326967b6e.3 for ; Sun, 02 Aug 2026 23:58:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1785740308; x=1786345108; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:mime-version:date:from :to:cc:subject:date:message-id:reply-to:content-type; bh=XqovcFe5p0Xr/iAlnmCGfLgOyscM3G7091IkNg+7W2o=; b=hA+V6W8Wjll8zhdOwNv3wVqeC3TrpuuvlFgBs4AEL0iOhAvfdiVqNdh189fS+YqYda 6d4yfZZyVpp6AFZOFZAn6xcJmDrART6tCMABUuwEjR2CJeaWKTtw3A4V+qMiVfnhhA8P aVyrTBdukX79eXg9fE8FEmAgorVtA2RBNipmuJpSa75uvLKahGKkvz7C2yCQeL1m6+JW FetNxq8L55dv2izKmfbgcnBuMQdRfShdphtOlT1Dn/A+6vNQoq4ROzKNIBuV7XwQgCQi /4ixSBlP9Fc5gbGfI1eCbWKR0xcwdmDbIN1WFyEBxSyLc7UMll8w2po8xfM9J27JIcWa u69Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785740308; x=1786345108; h=content-type:cc:to:from:subject:message-id:mime-version:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=XqovcFe5p0Xr/iAlnmCGfLgOyscM3G7091IkNg+7W2o=; b=tWeeZMDX0ELyvqeBu6Ntv+iI4FC3rJrrSircAVE1GRr679Ja5IVGfVudJih91ZRQNQ Ug/kwtDnV2i/6SVhSVIA6tDOSXjDcUoBf6HWSLRzg5dmfFwS83iyuxPsh2bqrKHzRspx wfAh0PGr8ev3Cp+xdAZ7fRkdV4vWvG5L1Rl1K7YWd6ObI+xLckbj+skp5ZRPUS5adbrB 4R+PLJ0L3kQz1UCRPnyjbaR3md/43rm8YWb6wTeD1MU1bLd11k9tYIleiEKZV7fu03ly I42PicH3OkTBkhcv139Kw7luOUn32uDqyp9sR/w2fAHse6lsWnAqZzAWNZfNHA7dK3ji 2W6Q== X-Gm-Message-State: AOJu0YwZ0laJdPSzZvUyiTt3/wbkGu8jllxFvfBySEVf6wlpzAc7B7TD r1niBBFyA6C1fVb/cyQP2e/y4G0G3zuRmk8hkmrpUh8fYKxDOxqRzyPvLS7+zqVWO2MXpl7XX+M MPTH8NQ== X-Received: from oabyo7-n1.prod.google.com ([2002:a05:687c:47:10b0:457:cbf4:edf3]) (user=yunkec job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6820:7083:10b0:6a3:1e40:6329 with SMTP id 006d021491bc7-6ae43223c2emr9485122eaf.13.1785740307827; Sun, 02 Aug 2026 23:58:27 -0700 (PDT) Date: Mon, 3 Aug 2026 15:58:11 +0900 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.55.0.508.g3f0d502094-goog Message-ID: <20260803065811.3490286-1-yunkec@google.com> Subject: [PATCH] media: uvcvideo: Add quirk for invalid dev_sof in Logitech C925e From: Yunke Cao To: Laurent Pinchart , Hans de Goede , Ricardo Ribalda , Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org, Yunke Cao Content-Type: text/plain; charset="UTF-8" Logitech C925e SOF does not increases at a stable rate of 1kHz. Add a quirk for this camera to make hwtimestamp usable. Before applying the quirk: ``` seq: 31 ts: 1075.543294 delta: 29.423 ms fps: 34.94 seq: 32 ts: 1075.573022 delta: 29.728 ms fps: 34.90 seq: 33 ts: 1075.602353 delta: 29.331 ms fps: 34.87 seq: 34 ts: 1075.632031 delta: 29.678 ms fps: 34.84 seq: 35 ts: 1076.177759 delta: 545.728 ms fps: 23.00 seq: 36 ts: 1076.213255 delta: 35.496 ms fps: 23.12 seq: 37 ts: 1076.209371 delta: -3.884 ms fps: 23.82 seq: 38 ts: 1076.232233 delta: 22.862 ms fps: 24.11 seq: 39 ts: 1076.264682 delta: 32.449 ms fps: 24.24 seq: 40 ts: 1076.287318 delta: 22.636 ms fps: 24.52 seq: 41 ts: 1076.285949 delta: -1.369 ms fps: 25.16 seq: 42 ts: 1076.317714 delta: 31.765 ms fps: 25.28 seq: 43 ts: 1076.317085 delta: -0.629 ms fps: 25.89 seq: 44 ts: 1076.339919 delta: 22.834 ms fps: 26.13 seq: 45 ts: 1076.212836 delta: -127.083 ms fps: 28.91 seq: 46 ts: 1076.242494 delta: 29.658 ms fps: 29.00 seq: 47 ts: 1076.271852 delta: 29.358 ms fps: 29.09 seq: 48 ts: 1076.301739 delta: 29.887 ms fps: 29.17 seq: 49 ts: 1076.330887 delta: 29.148 ms fps: 29.26 seq: 50 ts: 1076.360639 delta: 29.752 ms fps: 29.33 seq: 51 ts: 1076.390095 delta: 29.456 ms fps: 29.41 ``` After applying the quirk: ``` seq: 31 ts: 203.782342 delta: 33.460 ms fps: 30.94 seq: 32 ts: 203.815492 delta: 33.150 ms fps: 30.91 seq: 33 ts: 203.849017 delta: 33.525 ms fps: 30.88 seq: 34 ts: 203.882190 delta: 33.173 ms fps: 30.86 seq: 35 ts: 203.915672 delta: 33.482 ms fps: 30.83 seq: 36 ts: 203.948902 delta: 33.230 ms fps: 30.81 seq: 37 ts: 203.982335 delta: 33.433 ms fps: 30.78 seq: 38 ts: 204.015475 delta: 33.140 ms fps: 30.76 seq: 39 ts: 204.048992 delta: 33.517 ms fps: 30.74 seq: 40 ts: 204.082208 delta: 33.216 ms fps: 30.72 seq: 41 ts: 204.115675 delta: 33.467 ms fps: 30.70 seq: 42 ts: 204.148995 delta: 33.320 ms fps: 30.69 seq: 43 ts: 204.182354 delta: 33.359 ms fps: 30.67 seq: 44 ts: 204.215605 delta: 33.251 ms fps: 30.66 seq: 45 ts: 204.249004 delta: 33.399 ms fps: 30.64 seq: 46 ts: 204.282259 delta: 33.255 ms fps: 30.63 seq: 47 ts: 204.315686 delta: 33.427 ms fps: 30.61 seq: 48 ts: 204.348945 delta: 33.259 ms fps: 30.60 seq: 49 ts: 204.382337 delta: 33.392 ms fps: 30.59 seq: 50 ts: 204.415570 delta: 33.233 ms fps: 30.58 seq: 51 ts: 204.449069 delta: 33.499 ms fps: 30.56 seq: 52 ts: 204.482218 delta: 33.149 ms fps: 30.55 seq: 53 ts: 204.515706 delta: 33.488 ms fps: 30.54 seq: 54 ts: 204.548940 delta: 33.234 ms fps: 30.53 seq: 55 ts: 204.582403 delta: 33.463 ms fps: 30.52 seq: 56 ts: 204.615563 delta: 33.160 ms fps: 30.51 seq: 57 ts: 204.649057 delta: 33.494 ms fps: 30.50 seq: 58 ts: 204.682301 delta: 33.244 ms fps: 30.49 seq: 59 ts: 204.715735 delta: 33.434 ms fps: 30.48 seq: 60 ts: 204.748890 delta: 33.155 ms fps: 30.48 ``` lsusb -v Bus 003 Device 005: ID 046d:085b Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 239 bDeviceSubClass 2 bDeviceProtocol 1 bMaxPacketSize0 64 idVendor 0x046d idProduct 0x085b bcdDevice 0.16 iManufacturer 0 iProduct 2 Logitech Webcam C925e iSerial 1 2F2036AF bNumConfigurations 1 Signed-off-by: Yunke Cao --- 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 e289cc71ba98..5b9ea19ad9f2 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -2706,6 +2706,15 @@ static const struct usb_device_id uvc_ids[] = { .bInterfaceSubClass = 1, .bInterfaceProtocol = 0, .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_INVALID_DEVICE_SOF) }, + /* Logitech HD Pro Webcam C925e */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x046d, + .idProduct = 0x085b, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_INVALID_DEVICE_SOF) }, /* Logitech Rally Bar Huddle */ { .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO, -- 2.55.0.508.g3f0d502094-goog