From: Nikola Cornij Date: Mon, 7 May 2018 19:35:15 +0000 (-0400) Subject: drm/amd/display: Read DPCD link caps up to and including DP_ADAPTER_CAP X-Git-Tag: v4.18-rc1~16^2^2~28 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=794550c6eaf791bfd2e8d70e11aa56fdd6361725;p=users%2Fhch%2Fuuid.git drm/amd/display: Read DPCD link caps up to and including DP_ADAPTER_CAP DP 1.4 compliance requires 16 bytes to be read when reading link caps, i.e. it requires DP_ADAPTER_CAP to be included. Included it for all DP versions because reading more than required won't fail. Signed-off-by: Nikola Cornij Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- 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 7d609c71394b..3fcb67cbc6cc 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 @@ -2278,7 +2278,7 @@ static void dp_wa_power_up_0010FA(struct dc_link *link, uint8_t *dpcd_data, static bool retrieve_link_cap(struct dc_link *link) { - uint8_t dpcd_data[DP_TRAINING_AUX_RD_INTERVAL - DP_DPCD_REV + 1]; + uint8_t dpcd_data[DP_ADAPTER_CAP - DP_DPCD_REV + 1]; union down_stream_port_count down_strm_port_count; union edp_configuration_cap edp_config_cap;