drm/amdgpu/display: change pipe policy for DCN 2.1

commit 879791ad8bf3dc5453061cad74776a617b6e3319 upstream.

Fixes crash on MST Hub disconnect.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1849
Fixes: ee2698cf79cc ("drm/amd/display: Changed pipe split policy to allow for multi-display pipe split")
Signed-off-by: Benjamin Marty <info@benjaminmarty.ch>
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/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index 92a308a..fbbdf99 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -874,7 +874,7 @@ static const struct dc_debug_options debug_defaults_drv = {
                .clock_trace = true,
                .disable_pplib_clock_request = true,
                .min_disp_clk_khz = 100000,
-               .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,