From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 22158153BF6 for ; Mon, 12 Aug 2024 14:53:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723474426; cv=none; b=r7RvX+abP4vO/BbbV08J49/wRwx5ruxZDS7yPIHa/cUx6D9NCvbcJ0wEHBgl5kfjcyO/8PPIe6fvNqR7VrBz4cRMecRyJHCIgbBaFyikKK2knAp8vt853S63OIFhIn7SX1VkuJXyQ/RuezHIobXJysi8/wEodA0X3+N9vprt0QE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723474426; c=relaxed/simple; bh=GchTE/pcM9K5cBx/GOqnQC2jrwV6DRjCLnR/G4XXIPY=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=q3z6LoZDiocTnSTjOH28G4sNy9QWqqBmIjmrIQ+4141l/pdmJTS1FLfHC272O9/fS5DEA3umam5gDOnh+SuInIaxW5suJ7QGMAlAcGSKJsik20upqgNUlQ0oDW74RDPmamEa8uk/JoyPh2l0QGrXKagrypHC3QqOdR3laax4Ir0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=mdT1cPpk; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="mdT1cPpk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 929CAC32782; Mon, 12 Aug 2024 14:53:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1723474426; bh=GchTE/pcM9K5cBx/GOqnQC2jrwV6DRjCLnR/G4XXIPY=; h=Subject:To:Cc:From:Date:From; b=mdT1cPpkqHf7kM2uCVVl8JDW41hOO5y23hHoRXfkPBMKdJzjEkg0HbHjX+QIRIQ4l cE2R6gLHEe6vebWSaNxWUkwthK1LieE3LV3IrQflB1KXXbbiSkETxiiRAMe2ohRNXi 7HbBCvK4ESYVk8VfObbPvqOQyvKaBAmzSmqhyK1c= Subject: FAILED: patch "[PATCH] drm/amd/display: Fix FEC_READY write on DP LT" failed to apply to 6.6-stable tree To: ilya.bakoulin@amd.com,alexander.deucher@amd.com,daniel.wheeler@amd.com,mario.limonciello@amd.com,wayne.lin@amd.com,wenjing.liu@amd.com Cc: From: Date: Mon, 12 Aug 2024 16:51:11 +0200 Message-ID: <2024081210-collie-staunch-198a@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x a8baec4623aedf36d50767627f6eae5ebf07c6fb # git commit -s git send-email --to '' --in-reply-to '2024081210-collie-staunch-198a@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: a8baec4623ae ("drm/amd/display: Fix FEC_READY write on DP LT") a8ac994cf069 ("drm/amd/display: Disable error correction if it's not supported") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a8baec4623aedf36d50767627f6eae5ebf07c6fb Mon Sep 17 00:00:00 2001 From: Ilya Bakoulin Date: Wed, 17 Apr 2024 14:21:28 -0400 Subject: [PATCH] drm/amd/display: Fix FEC_READY write on DP LT [Why/How] We can miss writing FEC_READY in some cases before LT start, which violates DP spec. Remove the condition guarding the DPCD write so that the write happens unconditionally. Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Reviewed-by: Wenjing Liu Acked-by: Wayne Lin Signed-off-by: Ilya Bakoulin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c index 5cbf5f93e584..bafa52a0165a 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c @@ -151,16 +151,14 @@ enum dc_status dp_set_fec_ready(struct dc_link *link, const struct link_resource return DC_NOT_SUPPORTED; if (ready && dp_should_enable_fec(link)) { - if (link->fec_state == dc_link_fec_not_ready) { - fec_config = 1; + fec_config = 1; - status = core_link_write_dpcd(link, DP_FEC_CONFIGURATION, - &fec_config, sizeof(fec_config)); + status = core_link_write_dpcd(link, DP_FEC_CONFIGURATION, + &fec_config, sizeof(fec_config)); - if (status == DC_OK) { - link_enc->funcs->fec_set_ready(link_enc, true); - link->fec_state = dc_link_fec_ready; - } + if (status == DC_OK) { + link_enc->funcs->fec_set_ready(link_enc, true); + link->fec_state = dc_link_fec_ready; } } else { if (link->fec_state == dc_link_fec_ready) {