Commit 9ca08992 authored Jan 16, 2019 by John Barberiz Committed by Alex Deucher Feb 05, 2019

drm/amd/display: Use udelay when waiting between aux retries



[Why]
"IRQ_HPD Pulse Length Test" DP compliance test
fails. Test complains that certain DPCD registers
are not read within 100 ms.

[How]
msleep is inaccurate for small values. Used udelay
instead for accuracy.

Signed-off-by: John Barberiz <John.Barberiz@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 1b52f2d5

drivers/gpu/drm/amd/display/dc/dce/dce_aux.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -516,7 +516,7 @@ bool dce_aux_transfer_with_retries(struct ddc_service *ddc,
		}
		}

		msleep(1);
		udelay(1000);
		}
		return false;
		}