Re: [PATCH v3 2/6] drm/msm/dp: reduce link rate if failed at link training 1

Quoting Kuogee Hsieh (2021-08-05 13:44:51)

Reduce link rate and re start link training if link training 1 failed due to loss of clock recovery done to fix Link Layer CTS case 4.3.1.7. Also only update voltage and pre-emphasis swing level after link training started to fix Link Layer CTS case 4.3.1.6.

Changes in V2: -- replaced cr_status with link_status[DP_LINK_STATUS_SIZE] -- replaced dp_ctrl_any_lane_cr_done() with dp_ctrl_colco_recovery_any_ok() -- replaced dp_ctrl_any_ane_cr_lose() with !drm_dp_clock_recovery_ok()

Changes in V3: -- return failed if lane_count <= 1

Signed-off-by: Kuogee Hsieh khsieh@codeaurora.org

Reviewed-by: Stephen Boyd swboyd@chromium.org