diff options
| author | Abhinav Kumar <quic_abhinavk@quicinc.com> | 2024-07-25 15:04:50 -0700 |
|---|---|---|
| committer | Abhinav Kumar <quic_abhinavk@quicinc.com> | 2024-08-05 13:55:26 -0700 |
| commit | 319aca883bfa1b85ee08411541b51b9a934ac858 (patch) | |
| tree | 597b0e22a89032f009985867cff140598b6c1375 | |
| parent | aedf02e46eb549dac8db4821a6b9f0c6bf6e3990 (diff) | |
drm/msm/dp: reset the link phy params before link training
Before re-starting link training reset the link phy params namely
the pre-emphasis and voltage swing levels otherwise the next
link training begins at the previously cached levels which can result
in link training failures.
Fixes: 8ede2ecc3e5e ("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> # SM8350-HDK
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/605946/
Link: https://lore.kernel.org/r/20240725220450.131245-1-quic_abhinavk@quicinc.com
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_ctrl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 7bc8a9f0657a..f342fc5ae41e 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1286,6 +1286,8 @@ static int dp_ctrl_link_train(struct dp_ctrl_private *ctrl, link_info.rate = ctrl->link->link_params.rate; link_info.capabilities = DP_LINK_CAP_ENHANCED_FRAMING; + dp_link_reset_phy_params_vx_px(ctrl->link); + dp_aux_link_configure(ctrl->aux, &link_info); if (drm_dp_max_downspread(dpcd)) |