Commit 3d028d5d authored by Wesley Chalmers's avatar Wesley Chalmers Committed by Alex Deucher
Browse files

drm/amd/display: Fix a bug when searching for insert_above_mpcc 



[WHY]
Currently, when insert_plane is called with insert_above_mpcc
parameter that is equal to tree->opp_list, the function returns NULL.

[HOW]
Instead, the function should insert the plane at the top of the tree.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: default avatarJun Lei <jun.lei@amd.com>
Acked-by: default avatarTom Chung <chiahsuan.chung@amd.com>
Signed-off-by: default avatarWesley Chalmers <wesley.chalmers@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 7ce34cbf

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c

+3 −2
Original line number Diff line number Diff line
@@ -212,6 +212,7 @@ struct mpcc *mpc1_insert_plane( 
		/* check insert_above_mpcc exist in tree->opp_list */

		struct mpcc *temp_mpcc = tree->opp_list;



		if (temp_mpcc != insert_above_mpcc)

			while (temp_mpcc && temp_mpcc->mpcc_bot != insert_above_mpcc)

				temp_mpcc = temp_mpcc->mpcc_bot;

		if (temp_mpcc == NULL)