[0/3] ACPI-PMIC + i915: Add support for PMIC MIPI sequences

Message

Hans de Goede Dec. 5, 2018, 9:03 p.m. UTC

Hi All,

This series is the result of me debugging and fixing the LCD panel not
lighting up on some CHT devices when they are booted with an external
monitor connected and the GOP only initializes the external monitor,
leaving the LCD uninitialized.

This is caused by the lack of support for executing PMIC MIPI sequences
in drivers/gpu/drm/i915/intel_dsi_vbt.c. Specifically the VBT on these
devices uses a PMIC MIPI sequence to toggle a GPIO on the PMIC.

Besides fixing the LCD panel not working at all when an external monitor
is used, this should also save some power when the panel is off.

This series touches some files under drivers/acpi/pmic as well as some
i915 code. Since the code under drivers/acpi/pmic does not change that
often, I believe it would be best to merge this entire series through
intel-drm-next-queued, with acks from the ACPI maintainers.

Regards,

Hans