From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E432318FDBD; Sat, 30 May 2026 18:47:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780166864; cv=none; b=rQ1le+e0v3jsnTaRFlzq3YazqqznglF+K1Gm4caDJr6HA/YizWquuA1NLNvO3eLATUsCDBVa1Z8gFIpojzaqFHqCF81vf+ZHVBvp3pcKU4AN5OUUbRWXpGo9nfqMquGK2pxcoJvv0zElXu1uh8ivBNCLsv2+DdcZ7B8AGhgKkTI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780166864; c=relaxed/simple; bh=RNNRmwe6ucmmLt3hz+fhT0wBc24gOi0xtAa6P2MoXu4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=rVEHfO2DXSrpo3xDc11P5+BcCR/zHlLfKnxX8bivzQabWe/kxm1wG/1KyiVYNh4vUcw9FG2+rYxR8KJDv7iasWQQ9nF/oD59YOtEVi/F6sqODttHQVy6DL+7+1M6LhcmVFNBqKaaSk9deywm+vJGBI8zIn/nYmC0M5cSNOXKL14= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tjZXhN03; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="tjZXhN03" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3506B1F00893; Sat, 30 May 2026 18:47:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780166863; bh=v4VY3YUDadFKcO47Rt9wgDmW6rz/xKUIZfcHYrk3AVA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=tjZXhN03i+zI9sr50nN5kVlnRS2LVEzPWkCH11Lfo0VBqpCerp/CiHN5jra5c2pUU gU5ZHIMmODr2844EJBB5mOGs2HCwChvWGgaUHjvs9S9dc1nqH/WTmYqYbJfvrLQDri BSIAilHdukL+JNG0O8T6atuUQY1IxH/le1Z87thw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Timur=20Krist=C3=B3f?= , Alex Deucher , Sasha Levin Subject: [PATCH 5.10 494/589] drm/amd/display: Allow DCE link encoder without AUX registers Date: Sat, 30 May 2026 18:06:15 +0200 Message-ID: <20260530160237.609486251@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160224.570625122@linuxfoundation.org> References: <20260530160224.570625122@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Timur Kristóf [ Upstream commit ac27e3f99035f132f23bc0409d0e57f11f054c70 ] Allow constructing the DCE link encoder without DDC, which means the AUX registers array will be NULL. This is necessary to support embedded connectors without DDC. Fixes: 4562236b3bc0 ("drm/amd/dc: Add dc display driver (v2)") Link: https://gitlab.freedesktop.org/drm/amd/-/work_items/5192 Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher (cherry picked from commit 87f30b101af62590faf6020d106da07efdda199b) Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c index 48bc459009547..f9d30fcfd052c 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c @@ -994,7 +994,9 @@ void dce110_link_encoder_hw_init( ASSERT(result == BP_RESULT_OK); } - aux_initialize(enc110); + + if (enc110->aux_regs) + aux_initialize(enc110); /* reinitialize HPD. * hpd_initialize() will pass DIG_FE id to HW context. -- 2.53.0