From nobody Sat Feb 7 21:24:18 2026 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 8350922337; Wed, 27 Mar 2024 12:08:06 +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=1711541286; cv=none; b=JGbfeNYu0K5AiCJYsP0tWJmK/vlZMr8T7xynjQfhoTH0qACvOmcURrZrTkPOmG0RN62Zlr9omPz1HkMtD1WDXLEO6aLA6s91i8UWYeKfc9iwwtzkefRoPOt6Pjua90tljX5XfWZuCgAWZlnDj0trIohjjhZMXaxdBu01QdzHubI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711541286; c=relaxed/simple; bh=hI+9SrSxqt4yNVHiTrypgdc+cCuIGbuwVKkE285Uvwk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Ieruj7prhGt4pBXCSwka61UtuMAGoEWuSPUINy0dRYFDvXCI7gj3FQV2akGQs00J3n65O9RN6EzPj6m7n1xQ5A+A/sFVmdubS8G4ckv+7THuBbemcWaZ51DxjWt5eWiFd9fBF+P6e5raqi3DJDM7WwG0C1EZAC/ozPoKw9n15tQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GTkkeNrB; 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="GTkkeNrB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4BAF1C433C7; Wed, 27 Mar 2024 12:08:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711541286; bh=hI+9SrSxqt4yNVHiTrypgdc+cCuIGbuwVKkE285Uvwk=; h=From:To:Cc:Subject:Date:From; b=GTkkeNrBSjLOYfJ/qFOXSPFVmbPndbdjUtjH/Yarc1KXRbTssMdaRrhXeR8V4/8q9 59ll8QNaBMuz9ExRn7sMSc4JRuem/3lEmktCPgDXtO3XxdBjsawUGBm58D1EXUmeGf k9tggvIacJjtg17XR3imji2Dd0ga5qmHvVugFLMr7SR8Na4RizBXP6cCmoDgAvhkPQ E3e5ulPhTyCgFwAqiu6iAzcfBK6V0E1zs5umFZdSvqUkdNFqYFeywLAYLRfbwPORzm OQ++XWXMm9JPrMSs8r/E3wlB5+GreV9jMwWO/yR/8xhFGuH/2NpKJe1xZQSzGXHkoA OcCSS2ePuXm4A== From: Sasha Levin To: stable@vger.kernel.org, Wayne.Lin@amd.com Cc: Mario Limonciello , Alex Deucher , Alex Hung , Daniel Wheeler , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: FAILED: Patch "drm/amd/display: Align the returned error code with legacy DP" failed to apply to 6.8-stable tree Date: Wed, 27 Mar 2024 08:08:04 -0400 Message-ID: <20240327120804.2825915-1-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Hint: ignore X-stable: review Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The patch below does not apply to the 6.8-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 . Thanks, Sasha Acked-by: Alex Hung Tested-by: Daniel Wheeler ------------------ original commit in Linus's tree ------------------ From 3b84525544be4ca0481110263a6d73eb00741cf3 Mon Sep 17 00:00:00 2001 From: Wayne Lin Date: Tue, 2 Jan 2024 14:20:37 +0800 Subject: [PATCH] drm/amd/display: Align the returned error code with legacy= DP [Why] For usb4 connector, AUX transaction is handled by dmub utilizing a differnt code path comparing to legacy DP connector. If the usb4 DP connector is disconnected, AUX access will report EBUSY and cause igt@kms_dp_aux_dev fail. [How] Align the error code with the one reported by legacy DP as EIO. Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Acked-by: Alex Hung Signed-off-by: Wayne Lin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/dr= ivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index eaf8d9f482446..85b7f58a7f35a 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -979,6 +979,11 @@ int dm_helper_dmub_aux_transfer_sync( struct aux_payload *payload, enum aux_return_code_type *operation_result) { + if (!link->hpd_status) { + *operation_result =3D AUX_RET_ERROR_HPD_DISCON; + return -1; + } + return amdgpu_dm_process_dmub_aux_transfer_sync(ctx, link->link_index, pa= yload, operation_result); } --=20 2.43.0