drm/amd/display: Don't set dpms_off for seamless boot

commit 23645bc upstream.

[Why]
eDPs fail to light up with seamless boot enabled

[How]
When seamless boot is enabled don't configure dpms_off
in disable_vbios_mode_if_required.

Reviewed-by: Charlene Liu <[email protected]>
Cc: Mario Limonciello <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: [email protected]
Acked-by: Tom Chung <[email protected]>
Signed-off-by: Daniel Miess <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Daniel Miess

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -1263,6 +1263,9 @@ static void disable_vbios_mode_if_required(
 		if (stream == NULL)
 			continue;
 
+		if (stream->apply_seamless_boot_optimization)
+			continue;
+
 		// only looking for first odm pipe
 		if (pipe->prev_odm_pipe)
 			continue;