linux-kernel - [PATCH v3] drm/amd/display: Add error check for avi and vendor infoframe setup function

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Message-ID: <20250414031439.1895-1-vulab@iscas.ac.cn>
Date: Mon, 14 Apr 2025 11:14:39 +0800
From: Wentao Liang <vulab@...as.ac.cn>
To: harry.wentland@....com,
	sunpeng.li@....com,
	Rodrigo.Siqueira@....com,
	alexander.deucher@....com,
	christian.koenig@....com,
	Xinhui.Pan@....com,
	airlied@...il.com,
	simona@...ll.ch,
	alex.hung@....com
Cc: chiahsuan.chung@....com,
	hamza.mahfooz@....com,
	sunil.khatri@....com,
	aurabindo.pillai@....com,
	hersenxs.wu@....com,
	mario.limonciello@....com,
	mwen@...lia.com,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Wentao Liang <vulab@...as.ac.cn>
Subject: [PATCH v3] drm/amd/display: Add error check for avi and vendor infoframe setup function

The function fill_stream_properties_from_drm_display_mode() calls the
function drm_hdmi_avi_infoframe_from_display_mode() and the
function drm_hdmi_vendor_infoframe_from_display_mode(), but does
not check its return value. Log the error messages to prevent silent
failure if either function fails.

Signed-off-by: Wentao Liang <vulab@...as.ac.cn>
---
v3: Fix error-logging function error
v2: Fix code diff error

 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 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 5f216d626cbb..cdf1a07aa8af 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6104,6 +6104,7 @@ static void fill_stream_properties_from_drm_display_mode(
 	struct amdgpu_dm_connector *aconnector = NULL;
 	struct hdmi_vendor_infoframe hv_frame;
 	struct hdmi_avi_infoframe avi_frame;
+	ssize_t err;
 
 	if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
 		aconnector = to_amdgpu_dm_connector(connector);
@@ -6150,9 +6151,17 @@ static void fill_stream_properties_from_drm_display_mode(
 	}
 
 	if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A) {
-		drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, (struct drm_connector *)connector, mode_in);
+		err = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame,
+							       (struct drm_connector *)connector,
+							       mode_in);
+		if (err < 0)
+			drm_err(connector->dev, "Failed to setup avi infoframe: %zd\n", err);
 		timing_out->vic = avi_frame.video_code;
-		drm_hdmi_vendor_infoframe_from_display_mode(&hv_frame, (struct drm_connector *)connector, mode_in);
+		err = drm_hdmi_vendor_infoframe_from_display_mode(&hv_frame,
+								  (struct drm_connector *)connector,
+								  mode_in);
+		if (err < 0)
+			drm_err(connector->dev, "Failed to setup vendor infoframe: %zd\n", err);
 		timing_out->hdmi_vic = hv_frame.vic;
 	}
 
-- 
2.42.0.windows.2