From: Eldad Zack Subject: [PATCH 1/3] ALSA: usb-audio: correct M-Audio C400 clock source quirk Date: Sun, 13 Jan 2013 23:02:02 +0100 Message-ID: <1358114524-5152-2-git-send-email-eldad@fogrefinery.com> References: <1358114524-5152-1-git-send-email-eldad@fogrefinery.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-bk0-f52.google.com (mail-bk0-f52.google.com [209.85.214.52]) by alsa0.perex.cz (Postfix) with ESMTP id 43624265113 for ; Sun, 13 Jan 2013 23:02:18 +0100 (CET) Received: by mail-bk0-f52.google.com with SMTP id w5so1671540bku.11 for ; Sun, 13 Jan 2013 14:02:18 -0800 (PST) In-Reply-To: <1358114524-5152-1-git-send-email-eldad@fogrefinery.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Takashi Iwai Cc: alsa-devel@alsa-project.org, Eldad Zack List-Id: alsa-devel@alsa-project.org Taking another look at the C400 descriptors, I see now that there is a clock selector (0x80) for this device. Right now, the clock source points to the internal clock (0x81), which is also valid. When the external clock source (0x82) is selected in the mixer, and the rates mismatch (if it's free-running it is fixed to 48KHz), xruns will occur. Set the clock ID to the clock selector unit (0x81), which then allows the validation code to function correctly. Signed-off-by: Eldad Zack --- sound/usb/quirks-table.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h index 78e845e..64d25a7 100644 --- a/sound/usb/quirks-table.h +++ b/sound/usb/quirks-table.h @@ -2289,7 +2289,7 @@ YAMAHA_DEVICE(0x7010, "UB99"), .rate_table = (unsigned int[]) { 44100, 48000, 88200, 96000 }, - .clock = 0x81, + .clock = 0x80, } }, /* Capture */ @@ -2315,7 +2315,7 @@ YAMAHA_DEVICE(0x7010, "UB99"), .rate_table = (unsigned int[]) { 44100, 48000, 88200, 96000 }, - .clock = 0x81, + .clock = 0x80, } }, /* MIDI */ -- 1.7.12.4