From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC55E4C10E8; Thu, 17 Sep 2026 15:48:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789660110; cv=none; b=WtsKAAKnbebB0tuJO0hJIlJp30/vqw2K82BRoYXzjCmxfpYM3mF5IjTOPK878q6GISs6lf/u29DEGdhHAPlKEUgMr9gv63HHXOwQPEegHdq9Qsbn6tP5ud+Oano64toRZmDFXYtLc6sbIF2oaaWcUyrjzfh38rNh2hYfXKKGjR8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789660110; c=relaxed/simple; bh=c9UTo42lbiN8EkiTMY9psEx+htdATRjdFYnSdufVVns=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lzubwuZMDSvU1VzRy/rYowC6PvUKUHBU+Z9R7zQlw9v9yFNbsZ6z7l72+eWVcZZJAqPCFTLtXkbYQ6ItEpQ2fQsT2S5z3Sb4w+mdgxDXexbiiz69kqRluWOTW7AR9l7Yc+HiQdfCD5X5EoVv4OHzfYvcFDIzyGLpCMULkwS7j/Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=B3QWJ8w8; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="B3QWJ8w8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F01361F0089A; Thu, 17 Sep 2026 15:48:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789660103; bh=ppRi/MqXj3bB8FxgkZZSGNdttrATllyRqi4VVIOqveg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=B3QWJ8w8IYbmWO7TTFGmTw1DrMD9doSBsxmLmsbSeyU1QWDz9GYi2mVohuUzSrb94 dik7Xj+Z4O6BWXVmvTk8LAUnsbREpscxMNrGlpQcAQbb7Pms43NghXTT8vCRM3KWmY z7y2SxfK8HG03f9BBDmrnTnEvIgzwwExl8WD4uYE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Roman Prucha , Takashi Iwai Subject: [PATCH 7.2 480/733] ALSA: ctxfi: Fix CA20K2 S/PDIF passthrough Date: Thu, 17 Sep 2026 16:13:08 +0100 Message-ID: <20260917151403.977960043@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151350.597953846@linuxfoundation.org> References: <20260917151350.597953846@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Roman Prucha commit b26a7a80e6bbf8dd17dacb127d12435d79375cf2 upstream. dao_rsc_init() encodes the DAIO configuration as conf = (desc->msr & 0x7) | (desc->passthru << 3); S/PDIF passthrough uses msr=1 and passthru=1, resulting in conf=9. daio_mgr_dao_init() masks conf with 0xf, but handles only values 1, 2, 4 and 8 when programming ATXCTL_NUC. As a result, conf=9 falls through to the default case and leaves NUC at its previous setting. On a Creative X-Fi Titanium HD SB1270 (CA20K2), this breaks AC3 IEC61937 passthrough when snd_ctxfi runs with reference_rate=48000,multiple=2. The receiver detects a non-audio stream but cannot decode the AC3 payload. With the unmodified driver, multiple=1 makes the same stream work. Handle conf=9 through the same NUC=0 path as conf=1. The change was runtime tested on the SB1270 with multiple=2 using IEC958 stereo PCM, pre-encoded AC3 IEC61937 passthrough and ALSA A52 live 5.1 encoding. Fixes: 26a9630c72eb ("ALSA: ctxfi: cthw20k2: fix mask on conf to allow 4 bits") Cc: stable@vger.kernel.org Assisted-by: LLM Signed-off-by: Roman Prucha Link: https://patch.msgid.link/20260903-ctxfi-spdif-conf9-fix-v1-1-5e4e3e1f801c@gmail.com Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/ctxfi/cthw20k2.c | 1 + 1 file changed, 1 insertion(+) --- a/sound/pci/ctxfi/cthw20k2.c +++ b/sound/pci/ctxfi/cthw20k2.c @@ -994,6 +994,7 @@ static int daio_mgr_dao_init(struct hw * /* S/PDIF output */ switch ((conf & 0xf)) { case 1: + case 9: set_field(&ctl->txctl[idx], ATXCTL_NUC, 0); break; case 2: