From: Sung Lee <[email protected]> [Why] The DP 1.4a Spec requires that training pattern only under certain specific conditions. Currently driver will re-send training pattern every time voltage swing value changes, but that should not be the case.
[How] Do not re-send training pattern every time VS values are different. Only send it on the first iteration. Change-Id: I5d98439de574c73c98edf21fe1741b947a365bf5 Signed-off-by: Sung Lee <[email protected]> Reviewed-by: Tony Cheng <[email protected]> Acked-by: Abdoulaye Berthe <[email protected]> Acked-by: Bhawanpreet Lakha <[email protected]> IP-reviewed-by: Yongqiang Sun <[email protected]> --- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 1bd0946829e3..3bb1b481451b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -983,7 +983,7 @@ static enum link_training_result perform_clock_recovery_sequence( offset); /* 2. update DPCD of the receiver*/ - if (!retries_cr) + if (!retry_count) /* EPR #361076 - write as a 5-byte burst, * but only for the 1-st iteration.*/ dpcd_set_lt_pattern_and_lane_settings( -- 2.17.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
