drm/amd/display: Only poll analog connectors

Analog connectors may be hot-plugged unlike other connector
types that don't support HPD.

Stop DRM from polling other connector types that don't
support HPD, such as eDP, LVDS, etc. These were wrongly
polled when analog connector support was added,
causing issues with the seamless boot process.

Fixes: c4f3f11 ("drm/amd/display: Poll analog connectors (v3)")
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reported-by: Matthew Schwartz <matthew.schwartz@linux.dev>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit e924c70)

Author: Timur Kristóf

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c

@@ -915,13 +915,19 @@ void amdgpu_dm_hpd_init(struct amdgpu_device *adev)
 		struct amdgpu_dm_connector *amdgpu_dm_connector;
 		const struct dc_link *dc_link;
 
-		use_polling |= connector->polled != DRM_CONNECTOR_POLL_HPD;
-
 		if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
 			continue;
 
 		amdgpu_dm_connector = to_amdgpu_dm_connector(connector);
 
+		/*
+		 * Analog connectors may be hot-plugged unlike other connector
+		 * types that don't support HPD. Only poll analog connectors.
+		 */
+		use_polling |=
+			amdgpu_dm_connector->dc_link &&
+			dc_connector_supports_analog(amdgpu_dm_connector->dc_link->link_id.id);
+
 		dc_link = amdgpu_dm_connector->dc_link;
 
 		/*