Re: [PATCH 1/3] drm/i915/vrr: Use vrr.in_range to determine if we need the AS SDP

["xizheTang2005@163.com" <xizheTang2005@163.com>]

I tested this series against #9252 (applied by semantics on Fedora
7.2.7-200.fc44 xe; the distro tree did not take a clean git-am).

Machine: Lenovo ThinkBook 14 G8+ IPH (21VG), Panther Lake
8086:b080, eDP.

The boot / resume full modeset still shows vertical corruption.
With Adaptive Sync = Always, a lid s2idle resume is sometimes
clean and sometimes leaves a persistent streak (same policy,
repeated resumes). With Never or Automatic the streak appears
and then recovers on its own. Userspace fastsets on an
already-lit panel do not show it.

intel_dp_needs_as_sdp() now returns crtc_state->vrr.in_range.
That flag is set from intel_vrr_is_in_range():

  intel_vrr_is_capable(connector) &&
  vrefresh >= monitor_range.min_vfreq &&
  vrefresh <= monitor_range.max_vfreq

It does not look at uapi.vrr_enabled / crtc_state->vrr.enable.
This panel's EDID range descriptor is 30-120 Hz, so both 60 Hz
and 120 Hz stay in_range while userspace has VRR off. The VRR
TG is still programmed (fixed_rr, flipline set).

drm.debug=0xe intel_crtc_state_dump:

1) Adaptive Sync Never, userspace modeset 3072x1920@60:

   vrr: no, fixed rr: yes, vmin: 2016, vmax: 2016, flipline: 2016,
        pipeline full: 0, guardband: 91 vsync start: 90, vsync end: 84
   DP SDP: Adaptive-Sync, revision 2, length 9
   operation mode: 1 (AVT_FIXED_VTOTAL)
   requested mode: "3072x1920": 60 390950 ... 2016

2) Same, Never, 3072x1920@120: identical vrr/flipline/AS SDP lines,
   requested mode 120 781886.

3) Never, s2idle resume (lid), 3072x1920@120: same dump, full
   [modeset] on pipe A. Not an in_range readout mismatch on resume.

4) Always, s2idle resume (lid), 3072x1920@120, full [modeset]:

   vrr: yes, fixed rr: no, vmin: 2016, vmax: 8064, flipline: 2016
   DP SDP: Adaptive-Sync, revision 2, length 9
   operation mode: 0 (AVT_DYNAMIC_VTOTAL)
   this captured resume was corrupt and stayed that way;
   later Always resumes on the same setup were sometimes clean

https://gitlab.freedesktop.org/drm/xe/kernel/-/work_items/9252
https://patchwork.freedesktop.org/series/174831/

Thanks,
Xizhe Tang