drm/amdgpu/display: change pipe policy for DCN 2.0

commit 6e7545ddb13416fd200e0b91c0acfd0404e2e27b upstream.

Fixes hangs on driver load with multiple displays on
DCN 2.0 parts.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=215511
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1877
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1886
Fixes: ee2698cf79cc ("drm/amd/display: Changed pipe split policy to allow for multi-display pipe split")
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index b01a21d8336cbba665876fe62979b2cfdb2e9898..ede11eb120d4faee8b331df3d4173b3b4bb0743a 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -1067,7 +1067,7 @@ static const struct dc_debug_options debug_defaults_drv = {
                .timing_trace = false,
                .clock_trace = true,
                .disable_pplib_clock_request = true,
-               .pipe_split_policy = MPC_SPLIT_DYNAMIC,
+               .pipe_split_policy = MPC_SPLIT_AVOID_MULT_DISP,
                .force_single_disp_pipe_split = false,
                .disable_dcc = DCC_ENABLE,
                .vsr_support = true,