Commit 79940e4d authored by Jaehyun Chung's avatar Jaehyun Chung Committed by Alex Deucher
Browse files

drm/amd/display: Blank stream before destroying HDCP session 



[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@vger.kernel.org
Signed-off-by: default avatarJaehyun Chung <jaehyun.chung@amd.com>
Reviewed-by: default avatarAlvin Lee <Alvin.Lee2@amd.com>
Acked-by: default avatarQingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b24bdc37

drivers/gpu/drm/amd/display/dc/core/dc_link.c

+1 −2
Original line number Diff line number Diff line
@@ -3286,12 +3286,11 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx) 
		core_link_set_avmute(pipe_ctx, true);

	}



	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);