drm/amd/display: Return max resolution supported by DWB

Alex Hung · alexdeucher · commit 2cc69a10d831 · 2024-04-09T23:30:19.000-04:00
mode_config's max width x height is 4096x2160 and is higher than DWB's
max resolution 3840x2160 which is returned instead.

Cc: stable@vger.kernel.org
Reviewed-by: Harry Wentland &lt;harry.wentland@amd.com&gt;
Acked-by: Hamza Mahfooz &lt;hamza.mahfooz@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c
@@ -76,10 +76,8 @@ static int amdgpu_dm_wb_encoder_atomic_check(struct drm_encoder *encoder,
 
 static int amdgpu_dm_wb_connector_get_modes(struct drm_connector *connector)
 {
-	struct drm_device *dev = connector->dev;
-
-	return drm_add_modes_noedid(connector, dev->mode_config.max_width,
-				    dev->mode_config.max_height);
+	/* Maximum resolution supported by DWB */
+	return drm_add_modes_noedid(connector, 3840, 2160);
 }
 
 static int amdgpu_dm_wb_prepare_job(struct drm_writeback_connector *wb_connector,

Original file line number	Diff line number	Diff line change
`@@ -76,10 +76,8 @@ static int amdgpu_dm_wb_encoder_atomic_check(struct drm_encoder *encoder,`
`76`	`76`
`77`	`77`	`static int amdgpu_dm_wb_connector_get_modes(struct drm_connector *connector)`
`78`	`78`	`{`
`79`		`- struct drm_device *dev = connector->dev;`
`80`		`-`
`81`		`- return drm_add_modes_noedid(connector, dev->mode_config.max_width,`
`82`		`- dev->mode_config.max_height);`
	`79`	`+ /* Maximum resolution supported by DWB */`
	`80`	`+ return drm_add_modes_noedid(connector, 3840, 2160);`
`83`	`81`	`}`
`84`	`82`
`85`	`83`	`static int amdgpu_dm_wb_prepare_job(struct drm_writeback_connector *wb_connector,`