pmaports/device/testing/device-wileyfox-crackling/modprobe.conf
Minecrell e129e3ddb0
device/device-<msm8916-mainline>: minor cleanup and fixes (MR 1125)
- Cleanup kernel cmdline:
  - earlycon can automatically detect the memory address of
    the UART controller based on the device tree
  - the comma before n8 in console=ttyMSM0,115200,n8 is actually
    invalid so this was not parsed correctly. However, it is the
    default anyway so we might as well remove it completely

- Configure deviceinfo_getty for all devices

- Workaround probe issue of display by adding a softdep on the panel
  module. This allows the display to work when excluding proprietary
  firmware (just a weird side effect, see comment in modprobe.conf...)
2020-04-14 12:48:04 +02:00

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#
# There is a weird probe issue if both MSM DRM and the panel driver are built
# as modules: When MSM DRM is loaded it registers the DSI bus for the panel.
# At this point the panel is not loaded yet, so the kernel sends an uevent
# to userspace to load the necessary panel module.
#
# This causes some delay until the panel module is loaded, so MSM DRM fails to
# probe temporarily and returns -EPROBE_DEFER (to request probing again later).
# Unfortunately this will also unregister the DSI bus for the panel, and the
# kernel will not try probing MSM DRM + panel again until some other (slow)
# driver loads after MSM DRM.
#
# Usually WCNSS (WiFi/BT) fits that criteria, allowing the display to work.
# But this does not work if the user decides to exclude proprietary firmware.
#
# To avoid this problem we add an explicit soft dependency for MSM DRM
# on the panel module, so modprobe loads the panel module first and MSM DRM
# will immediately find the panel it is looking for.
#
softdep msm pre: panel-booyi-otm1287