[PATCH v2] drm/msm/dp: delete DP_RECOVERED_CLOCK_OUT_EN to fix tps4

Stephen Boyd swboyd at chromium.org
Mon Aug 1 21:23:01 UTC 2022


Quoting Kuogee Hsieh (2022-08-01 13:13:50)
> Data Symbols scrambled is required for tps4 at link training 2.
> Therefore SCRAMBLING_DISABLE bit should not be set for tps4 to
> work.
> RECOVERED_CLOCK_OUT_EN is for enable simple EYE test for jitter
> measurement with minimal equipment for embedded applications purpose
> and is not required to be set during normal operation.
> Current implementation always have RECOVERED_CLOCK_OUT_EN bit set
> which cause SCRAMBLING_DISABLE bit wrongly set at tps4 which prevent
> tps4 from working.
> This patch delete setting RECOVERED_CLOCK_OUT_EN to fix SCRAMBLING_DISABLE
> be wrongly set at tps4.
>
> Changes in v2:
> -- fix Fixes tag
>
> Fixes: c943b4948b58 ("drm/msm/dp: add displayPort driver support")
> Signed-off-by: Kuogee Hsieh <quic_khsieh at quicinc.com>
> ---

Reviewed-by: Stephen Boyd <swboyd at chromium.org>


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