From: Jaehyun Chung <jaehyun.chung@xxxxxxx> commit 79940e4d10df9c737a394630968471c632246ee0 upstream. [Why] Stream disable sequence incorretly destroys HDCP session while stream is not blanked and while audio is not muted. This sequence causes a flash of corruption during mode change and an audio click. [How] Change sequence to blank stream before destroying HDCP session. Audio will also be muted by blanking the stream. Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Jaehyun Chung <jaehyun.chung@xxxxxxx> Reviewed-by: Alvin Lee <Alvin.Lee2@xxxxxxx> Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -3113,12 +3113,11 @@ void core_link_disable_stream(struct pip dc_is_virtual_signal(pipe_ctx->stream->signal)) return; + dc->hwss.blank_stream(pipe_ctx); #if defined(CONFIG_DRM_AMD_DC_HDCP) update_psp_stream_config(pipe_ctx, true); #endif - dc->hwss.blank_stream(pipe_ctx); - if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) deallocate_mst_payload(pipe_ctx);
