Commit 3626a6ae authored by George Shen's avatar George Shen Committed by Alex Deucher
Browse files

drm/amd/display: Handle Y carry-over in VCP X.Y calculation 



[Why/How]
Theoretically rare corner case where ceil(Y) results in rounding
up to an integer. If this happens, the 1 should be carried over to
the X value.

Reviewed-by: default avatarWenjing Liu <wenjing.liu@amd.com>
Acked-by: default avatarAnson Jacob <Anson.Jacob@amd.com>
Signed-off-by: default avatarGeorge Shen <george.shen@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent c01baf22

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c

+6 −0
Original line number Diff line number Diff line
@@ -647,6 +647,12 @@ void enc1_stream_encoder_set_throttled_vcp_size( 
				x),

			26));



	// If y rounds up to integer, carry it over to x.

	if (y >> 26) {

		x += 1;

		y = 0;

	}



	REG_SET_2(DP_MSE_RATE_CNTL, 0,

		DP_MSE_RATE_X, x,

		DP_MSE_RATE_Y, y);