From efae5a9eb47b76d5f84c0a0ca2ec95c9ce8a393c Mon Sep 17 00:00:00 2001 From: Wayne Lin Date: Mon, 4 Dec 2023 10:09:33 +0800 Subject: [PATCH] drm/amd/display: pbn_div need be updated for hotplug event link_rate sometime will be changed when DP MST connector hotplug, so pbn_div also need be updated; otherwise, it will mismatch with link_rate, causes no output in external monitor. Cc: stable@vger.kernel.org Tested-by: Daniel Wheeler Reviewed-by: Jerry Zuo Acked-by: Rodrigo Siqueira Signed-off-by: Wade Wang Signed-off-by: Wayne Lin Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index ddde330860fc..a144024df97c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -7005,8 +7005,7 @@ static int dm_encoder_helper_atomic_check(struct drm_encoder *encoder, if (IS_ERR(mst_state)) return PTR_ERR(mst_state); - if (!mst_state->pbn_div.full) - mst_state->pbn_div.full = dfixed_const(dm_mst_get_pbn_divider(aconnector->mst_root->dc_link)); + mst_state->pbn_div.full = dfixed_const(dm_mst_get_pbn_divider(aconnector->mst_root->dc_link)); if (!state->duplicated) { int max_bpc = conn_state->max_requested_bpc; -- 2.25.1