[PATCH 0/4] drm/panel: himax-hx8279: add VDDP supply for Startek KD070FHFID078

[David Lechner]

The Startek KD070FHFID078 panel has a VDDP power input, which feeds its
DC-DC converter in addition to VDD and IOVCC. On the MediaTek Genio 520
and 720 EVKs, VDDP is switched by its own regulator, and on the Genio
1200 EVK it comes from its own PMIC LDO, so it needs to be described and
enabled. The existing Genio 1200 EVK device tree also turned out to
describe the panel supplies incorrectly, so this series fixes that too.

Patch 1 adds vddp-supply to the binding, required for the Startek panel
only, since it is not known whether the Aoly panel has a VDDP input.
Patch 2 enables the new supply in the driver. Boards without a
vddp-supply in their device tree get a dummy regulator and keep working
so nothing breaks.

Patch 3 adds the property to the Genio 510 and 700 EVK device trees,
where VDDP and VDD share the same VSYS_LCM1 rail. Patch 4 fixes the
panel supplies on the Genio 1200 EVK: its device tree pointed vdd-supply
at the VDDP rail and used the backlight (VDD) switch as the IOVCC
regulator.

The Genio 520 and 720 EVK device trees are not upstream yet; U-Boot
support for them is being submitted separately and uses this property.

Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx>
---
David Lechner (4):
      dt-bindings: display: panel: himax,hx8279: add vddp-supply
      drm/panel: himax-hx8279: add the VDDP supply
      arm64: dts: mediatek: mt8390-genio-common: add the panel vddp-supply
      arm64: dts: mediatek: mt8395-genio-common: fix the panel supplies

 .../bindings/display/panel/himax,hx8279.yaml        | 13 +++++++++++++
 .../boot/dts/mediatek/mt8390-genio-common.dtsi      |  1 +
 .../boot/dts/mediatek/mt8395-genio-common.dtsi      | 21 ++++++++-------------
 drivers/gpu/drm/panel/panel-himax-hx8279.c          |  3 ++-
 4 files changed, 24 insertions(+), 14 deletions(-)
---
base-commit: 5d7b464a4f517d1db533b1b231f42ddcf4e1dff4
change-id: 20261006-panel-himax-hx8279-vddp-5dabebff2c99

Best regards,
--  
David Lechner <dlechner@xxxxxxxxxxxx>