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    Subject[PATCH 5.10 031/104] drm/amd/display: Fix DPCD translation for LTTPR AUX_RD_INTERVAL
    Date
    From: George Shen <george.shen@amd.com>

    [ 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>
    ---
    drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 6 +++---
    1 file changed, 3 insertions(+), 3 deletions(-)

    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 17e6fd8201395..32b73ea866737 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
    @@ -877,13 +877,13 @@ 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;
    + aux_rd_interval_us = 4000;
    break;
    case 0x02:
    - aux_rd_interval_us = 4000;
    + aux_rd_interval_us = 8000;
    break;
    case 0x03:
    - aux_rd_interval_us = 8000;
    + aux_rd_interval_us = 12000;
    break;
    case 0x04:
    aux_rd_interval_us = 16000;
    --
    2.27.0


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