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drm/amd/display: Fix DPCD translation for LTTPR AUX_RD_INTERVAL

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[ Upstream commit 2b6b7ab4b1cabfbee1af5d818efcab5d51d62c7e ]

[Why]
The translation between the DPCD value and the specified AUX_RD_INTERVAL
in the DP spec do not match.

[How]
Update values to match the spec.

Signed-off-by: George Shen <george.shen@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
George Shen 2020-12-22 14:05:41 -05:00 committed by Greg Kroah-Hartman
parent 07c8c581d2
commit 7963f3ff8e
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View File

@ -877,14 +877,14 @@ static uint32_t translate_training_aux_read_interval(uint32_t dpcd_aux_read_inte
switch (dpcd_aux_read_interval) {
case 0x01:
aux_rd_interval_us = 400;
break;
case 0x02:
aux_rd_interval_us = 4000;
break;
case 0x03:
case 0x02:
aux_rd_interval_us = 8000;
break;
case 0x03:
aux_rd_interval_us = 12000;
break;
case 0x04:
aux_rd_interval_us = 16000;
break;