* linux-ptl: add package with audio, wifi, and Panel Replay SU patches
Adds the linux-ptl Omarchy package for Panther Lake (PTL) hardware.
The stock Arch linux kernel on PTL is missing: SDCA audio class
driver backports, an iwlwifi generation-data fix, and Panel Replay
SU enablement + cursor-lag workaround. Ship them in this package
until they land upstream and Arch picks them up.
Patch sets
==========
Audio (SDCA backports on 6.19.10)
0001-0005, 0007-0008, 0010, 0012-0014, 0017
Cirrus CS35L57 amps and SDCA jack on Dell XPS OLED require the
SDCA class driver plus a NULL-pointer fix (0017). Without these
the sound card never registers. 0006/0009/0011/0015/0016 from the
full upstream series are already in 6.19.10 stable and not needed.
WiFi
0018-wifi-iwlwifi-mld-correctly-set-wifi-generation-data.patch
Backport from wifi-next to fix wifi generation data reporting on
Intel AX/BE radios in PTL.
Display (PSR2 + Panel Replay SU)
0019-drm-i915-psr-accept-early-transport-for-psr2.patch
0020-drm-i915-psr-fix-su-granularity-source-for-psr2.patch
0022-drm-i915-psr-allow-psr-with-vrr-on-ptl.patch
Enable PSR2 Early Transport and fix the SU-granularity DPCD
source so PSR2 is not rejected at compute_config on OLED
panels (LGD 2880x1800 etc). Also allow PSR with VRR on PTL.
0026-drm-i915-psr-handle-Panel-Replay-full-line-SU-granul.patch
PR SU can advertise X granularity = 0xFFFF (full-line).
Without this the modulo check rejects PR SU.
0027-drm-i915-trans-push-frame-change-for-panel-replay.patch
Program TRANS_PUSH Frame Change path so PR SU cursor/plane
updates actually trigger selective updates.
0028-drm-i915-psr-exit-Panel-Replay-for-ALPM-lag.patch
Workaround for the LGD OLED panel (Dell XPS 14 DA14260,
sink OUI 00:22:b9). PR ALPM AUX-Less wake/sleep cycling on
this panel cannot resume selective updates at frame rate,
producing ~15 Hz visible motion from a 120 Hz source.
The workaround exits PR in frontbuffer_flush() and uses the
existing dc3co_work delayed_work as a 50 ms idle timer.
During continuous motion the timer is re-armed by each flush,
so the link stays awake and motion is smooth; after 50 ms of
genuine idle, dc3co_work fires and PR re-activates with ALPM
for power savings.
Compared to a per-commit exit/re-enter approach (earlier
revision of this PR), the delayed re-entry keeps video and
animation playback smooth: per-commit cycling pays the panel's
wake-to-display latency on every frame, which is visible as
playback stutter. 50 ms was chosen empirically against 100 ms
and 200 ms on the same device; 50 ms gives the best idle and
cursor-motion power while remaining subjectively identical in
smoothness to the longer delays.
Power on Dell XPS 14 OLED (LGD 2880x1800 @ 120 Hz, battery,
brightness 268/512, 10-run averaged idle):
PR SU + delayed-re-entry WA : 3268 mW (smooth)
PR SU stock (cursor laggy) : 3384 mW
PR SU + WA 100 ms : 3436 mW
PR SU + WA 200 ms : 3484 mW
PSR2 : 4060 mW (baseline)
config.x86_64 changes
=====================
Required for the kernel to boot cleanly on this hardware:
CONFIG_PINCTRL_INTEL_PLATFORM=y (was =m)
Without this the PTL GPIO controller is a late-loaded module
and early probe of CS35L57 audio amps (spk-id-gpios) and the
I2C touchpad time out with EPROBE_DEFER / -110 ETIMEDOUT.
CONFIG_VFAT_FS=y, CONFIG_FAT_FS=y, CONFIG_MSDOS_FS=y,
CONFIG_NLS_ISO8859_1=y (all were =m)
Required for the ESP /boot to mount in the initramfs / UKI
boot flow. Without these the box drops to emergency mode.
CONFIG_RUST is disabled in this package because Arch Rust 1.94.1
is too new for kernel 6.19.x Rust code.
* Backport DisplayID adaptive sync VRR parsing
* add vrr patch
* fix linux-ptl patch indentation
* linux-ptl: renumber DisplayID VRR patch
---------
Co-authored-by: Gaggery Tsai <gaggery.tsai@gmail.com>
Co-authored-by: Spencer Bull <Spencer.Bull@Dell.com>
