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 7CDC73C7DAE; Sat, 28 Feb 2026 17:39:40 +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=1772300380; cv=none; b=YQhdOMoU3RexMltAmt0fujzqgoyBMSt3dj8NKajpeM/smgNqP/pIImm3DPk5/Lsx+jLN6t4Wu7NDiPJK1tupNRu9FaQCszsFFa9b1EC+Vr+FZaOPsHI9eSIYUnjlxm5QEHC0V7Q8CS1CfsBu4/UlG/Cch6HDN2YPPU35xkpMt7c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772300380; c=relaxed/simple; bh=m89m20wiqH7mnSq3LhErip9IslFvY+E+ehGPSQd9HaM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eyJ37pORMitEGHiHUocPRC9NcDFVxE7kOw5zyJmuBuxcJqzSkti7+lBzDiVUqexz0op9TinIfRfYAj9GpZBm76Bwe0ZDDBX4gbj+7xIg1lqPAHJikvhkNU7fwjIsGDyxgZQQEBPqNE2QGiCwu6hjJ7m/92DCcBpBfvR6BBOYiac= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pnuA2Nr/; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pnuA2Nr/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89CC6C2BC87; Sat, 28 Feb 2026 17:39:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772300380; bh=m89m20wiqH7mnSq3LhErip9IslFvY+E+ehGPSQd9HaM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pnuA2Nr/cb+U9gVnxh+s3wfM6E+H1CMwMQjT9+t/0OPSz2RuYaUe5+GIX46SPg5np HMAodA/gUvnW58HHqLv++JqsXPPFq5OZNZXyzscCfqeI/EgZalY4bn6xDAMxajguWa qFcvbk77nT9kOsLADEl51oFeS2DhEs28WlcoiK4v/KuPCLFUN5cah9QQIyNsg8sIeF u+gmtbpb2ZdqA9jw7vDfU2uGw53rc7HZvDe5xWH+bCstmgVAkGxy3N3D7eH84KiB4W JO08K3hvsQLLY9kHx0DoD3s9wsRkQA70cHINt1QbipNaz6MBKjjDfXiVULDLsRYDm+ VI3nNVc6mOYTg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alex Hung , Harry Wentland , Wayne Lin , Dan Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 6.19 416/844] drm/amd/display: Fix writeback on DCN 3.2+ Date: Sat, 28 Feb 2026 12:25:29 -0500 Message-ID: <20260228173244.1509663-417-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228173244.1509663-1-sashal@kernel.org> References: <20260228173244.1509663-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Alex Hung [ Upstream commit 9ef84a307582a92ef055ef0bd3db10fd8ac75960 ] [WHAT] 1. Set no scaling for writeback as they are hardcoded in DCN3.2+. 2. Set no fast plane update for writeback commits. Reviewed-by: Harry Wentland Signed-off-by: Alex Hung Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 209a6e5c713ca..150cc3fc7b2a9 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -10648,10 +10648,10 @@ static void dm_set_writeback(struct amdgpu_display_manager *dm, wb_info->dwb_params.capture_rate = dwb_capture_rate_0; - wb_info->dwb_params.scaler_taps.h_taps = 4; - wb_info->dwb_params.scaler_taps.v_taps = 4; - wb_info->dwb_params.scaler_taps.h_taps_c = 2; - wb_info->dwb_params.scaler_taps.v_taps_c = 2; + wb_info->dwb_params.scaler_taps.h_taps = 1; + wb_info->dwb_params.scaler_taps.v_taps = 1; + wb_info->dwb_params.scaler_taps.h_taps_c = 1; + wb_info->dwb_params.scaler_taps.v_taps_c = 1; wb_info->dwb_params.subsample_position = DWB_INTERSTITIAL_SUBSAMPLING; wb_info->mcif_buf_params.luma_pitch = afb->base.pitches[0]; @@ -11667,6 +11667,8 @@ static bool should_reset_plane(struct drm_atomic_state *state, struct drm_crtc_state *old_crtc_state, *new_crtc_state; struct dm_crtc_state *old_dm_crtc_state, *new_dm_crtc_state; struct amdgpu_device *adev = drm_to_adev(plane->dev); + struct drm_connector_state *new_con_state; + struct drm_connector *connector; int i; /* @@ -11677,6 +11679,15 @@ static bool should_reset_plane(struct drm_atomic_state *state, state->allow_modeset) return true; + /* Check for writeback commit */ + for_each_new_connector_in_state(state, connector, new_con_state, i) { + if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) + continue; + + if (new_con_state->writeback_job) + return true; + } + if (amdgpu_in_reset(adev) && state->allow_modeset) return true; -- 2.51.0