[Intel-gfx] How to check the HDMI TMDS clock frequency and DP link symbol clock frequency, on HSW/BDW/VLV?

[Lin, Mengdong]

Hi,

Could someone clarify how to check HDMI TMDS clock frequency and DisplayPort link symbol clock frequency?

-          Is there some registers which can dump the clock frequency?

-          Is 'clock' field in 'struct drm_display_mode' reflect the this clock?

My platform is Haswell, Broadwell and Baytrail (Valleyview).

I want to check

-          TMDS clock frequency for HDMI

-          Link Symbol clock for DP

One test monitor has problem to play 48khz audio. So I want to make sure N/M/CTS values are right for the display clock and audio sample rate.

Thanks
Mengdong

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