From nobody Fri Oct 24 20:26:19 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA4AAC2BB47 for ; Mon, 15 Aug 2022 21:08:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244973AbiHOVFc (ORCPT ); Mon, 15 Aug 2022 17:05:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243708AbiHOVDM (ORCPT ); Mon, 15 Aug 2022 17:03:12 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10AE7D2E87; Mon, 15 Aug 2022 12:14:25 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 3A5DA6009B; Mon, 15 Aug 2022 19:14:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2AD8FC433D6; Mon, 15 Aug 2022 19:14:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660590864; bh=iJPDOtGlJElJvvZyDG8X4vC4wyhhFqxMXB3Iss6pbig=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qREuBFEXWB5zzv58IORpz5FkIrI1dyA/KdUD57Lp41jXn6dOm+T5AEg91twTLs7/9 eU56aHM00A3lCJLCl3tUJ/vw0AmdCBtHCCjADgXCBpAkWUqxGqNNV1ERCGdSCoiYNR uLUkIVtbTTtib3WczfVW62+ep2ViwmPGLMNBTcaE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dom Cobley , Maxime Ripard , Sasha Levin Subject: [PATCH 5.18 0394/1095] drm/vc4: hdmi: Avoid full hdmi audio fifo writes Date: Mon, 15 Aug 2022 19:56:33 +0200 Message-Id: <20220815180445.988914873@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180429.240518113@linuxfoundation.org> References: <20220815180429.240518113@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Dom Cobley [ Upstream commit 1c594eeccf92368177c2e22f1d3ee4933dfb8567 ] We are getting occasional VC4_HD_MAI_CTL_ERRORF in HDMI_MAI_CTL which seem to correspond with audio dropouts. Reduce the threshold where we deassert DREQ to avoid the fifo overfilling Fixes: bb7d78568814 ("drm/vc4: Add HDMI audio support") Signed-off-by: Dom Cobley Link: https://lore.kernel.org/r/20220613144800.326124-21-maxime@cerno.tech Signed-off-by: Maxime Ripard Signed-off-by: Sasha Levin --- drivers/gpu/drm/vc4/vc4_hdmi.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 0fe04b1f9782..114b007a1e6e 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -1626,10 +1626,10 @@ static int vc4_hdmi_audio_prepare(struct device *de= v, void *data, =20 /* Set the MAI threshold */ HDMI_WRITE(HDMI_MAI_THR, - VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICHIGH) | - VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICLOW) | - VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQHIGH) | - VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQLOW)); + VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_PANICHIGH) | + VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_PANICLOW) | + VC4_SET_FIELD(0x06, VC4_HD_MAI_THR_DREQHIGH) | + VC4_SET_FIELD(0x08, VC4_HD_MAI_THR_DREQLOW)); =20 HDMI_WRITE(HDMI_MAI_CONFIG, VC4_HDMI_MAI_CONFIG_BIT_REVERSE | --=20 2.35.1