From mboxrd@z Thu Jan 1 00:00:00 1970 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 2AF53C433FE for ; Mon, 10 Oct 2022 00:16:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232087AbiJJAQj (ORCPT ); Sun, 9 Oct 2022 20:16:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55290 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232030AbiJJAPu (ORCPT ); Sun, 9 Oct 2022 20:15:50 -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 4207958DE5; Sun, 9 Oct 2022 16:52:17 -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 EE10660D3F; Sun, 9 Oct 2022 23:52:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 883FFC433D7; Sun, 9 Oct 2022 23:52:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665359535; bh=Ol+2Xj2+b+tySJ+C/RyQP4TaRR4MLjLtzXy+zmFgurg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VU9kY46989hLIM5rIwfXnpo9UyI3qE6fEcgLZ4Hr+r/IWftgoUjPEA/nKFjKV/CKC +sqauSuxcjs+i8H5N9FH4hoMcjfUvei+ePugXeh016B/Bm6HLOPueyaGk66SS/7UNU DtdLsAPSGZFOuscLFQpAaipMUeDGmNznM5ADOOE4pHtkSHz/vxh8tU5kfyWUgLo7Rf vxnIecUqYyY+rR2HFy/n06nZ/VvGAUMbwBlJXUHSI5r7p1uemDzR25amRz1nCNeHUw S5xBjtGdXmYHmrPKme4SiADr/z6mIxd2hFcp1XIYiCDLbOAuiYkl0DrYl1mZnr2FV2 Z9w8XkuW6Z4Lw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wenjing Liu , Ariel Bernstein , Jasdeep Dhillon , Daniel Wheeler , Alex Deucher , Sasha Levin , harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, Jerry.Zuo@amd.com, wayne.lin@amd.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.0 42/44] drm/amd/display: polling vid stream status in hpo dp blank Date: Sun, 9 Oct 2022 19:49:30 -0400 Message-Id: <20221009234932.1230196-42-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221009234932.1230196-1-sashal@kernel.org> References: <20221009234932.1230196-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wenjing Liu [ Upstream commit e32df0c7ecead95d70ca89f39b1b2b02a59ff691 ] [why] vid stream control is double bufferred, if we don't wait for video stream enable set to 0, we may get temporary image corruption showing on the stream when setting PIXEL_TO_SYMBOL_FIFO_ENABLE to 0. Reviewed-by: Ariel Bernstein Acked-by: Jasdeep Dhillon Signed-off-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- .../drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c index 23621ff08c90..52fb2bf3d578 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c @@ -150,9 +150,9 @@ static void dcn31_hpo_dp_stream_enc_dp_blank( * 10us*5000=50ms. This covers 41.7ms of minimum 24 Hz mode + * a little more because we may not trust delay accuracy. */ - //REG_WAIT(DP_SYM32_ENC_VID_STREAM_CONTROL, - // VID_STREAM_STATUS, 0, - // 10, 5000); + REG_WAIT(DP_SYM32_ENC_VID_STREAM_CONTROL, + VID_STREAM_STATUS, 0, + 10, 5000); /* Disable SDP tranmission */ REG_UPDATE(DP_SYM32_ENC_SDP_CONTROL, -- 2.35.1