Re: [PATCH v2] drm/i915/cdclk: Don't force cd2x pipe select on Xe3 in bxt_sanitize_cdclk()

Zhefu Zhang <[email protected]>
Newsgroups gmane.linux.kernel,gmane.comp.freedesktop.xorg.drivers.intel,gmane.comp.video.dri.devel
Message-ID <[email protected]> 
I hit the same bug independently on a Panther Lake laptop
(Xiaomi Book Pro 14 2026, 8086:b080, Xe3_LPD display 30 stepping B0).

Arch linux 7.1.8 stock reproduces the corruption with two
"CPU pipe A FIFO underrun" errors. With the same change applied on 7.1.8,
the panel is clean and the boot log has no FIFO underrun. Also verified
the same change on current drm-tip (b801f94c49ffdb0f65e37baf31d68570356d4983):
normal panel, no FIFO underrun.

Tested-by: Zhefu Zhang <[email protected]>
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