From: Leo (Hanghong) Ma Date: Thu, 24 Jan 2019 20:07:52 +0000 (-0500) Subject: drm/amd/display: Fix MST reboot/poweroff sequence X-Git-Tag: v5.4-rc1~1566^2~2^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d2f0b53bda3193874f3905bc839888f895d1c0cf;p=platform%2Fkernel%2Flinux-rpi.git drm/amd/display: Fix MST reboot/poweroff sequence [Why] drm_dp_mst_topology_mgr_suspend() is added into the new reboot sequence, which disables the UP request at the beginning. Therefore sideband messages are blocked. [How] Finish MST sideband message transaction before UP request is suppressed. Signed-off-by: Leo (Hanghong) Ma Reviewed-by: Roman Li Acked-by: Leo Li Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- 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 0b392bf..5296b8f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -786,12 +786,13 @@ static int dm_suspend(void *handle) struct amdgpu_display_manager *dm = &adev->dm; int ret = 0; + WARN_ON(adev->dm.cached_state); + adev->dm.cached_state = drm_atomic_helper_suspend(adev->ddev); + s3_handle_mst(adev->ddev, true); amdgpu_dm_irq_suspend(adev); - WARN_ON(adev->dm.cached_state); - adev->dm.cached_state = drm_atomic_helper_suspend(adev->ddev); dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D3);