[v4,0/7] Fix RK3588 GPU power domain

Hi,

I got a report, that the Linux kernel crashes on Rock 5B when the panthor
driver is loaded late after booting. The crash starts with the following
shortened error print:

rockchip-pm-domain fd8d8000.power-management:power-controller: failed to set domain 'gpu', val=0
rockchip-pm-domain fd8d8000.power-management:power-controller: failed to get ack on domain 'gpu', val=0xa9fff
SError Interrupt on CPU4, code 0x00000000be000411 -- SError

This series first does some cleanups in the Rockchip power domain
driver and changes the driver, so that it no longer tries to continue
when it fails to enable a domain. This gets rid of the SError interrupt
and long backtraces. But the kernel still hangs when it fails to enable
a power domain. I have not done further analysis to check if that can
be avoided.

Last but not least this provides a fix for the GPU power domain failing
to get enabled - after some testing from my side it seems to require the
GPU voltage supply to be enabled.

This introduces devm_of_regulator_get without the _optional suffix, since
that is more sensible for the Rockchip usecase. Longer explanation can be
seen in patch 6, which adds the handling to the Rockchip driver. My merge
suggestion would be that Mark provides an immutable branch.

The last patch, which updates the RK3588 board files should cover all RK3588
boards that are currently in Heiko's for-next branch. Any board missing the
update will behave as before, so it is perfectly fine not to update all DT
files at once (in case I missed any).

Changes since PATCHv3:
 * https://lore.kernel.org/linux-rockchip/20241022154508.63563-1-sebastian.reichel@collabora.com/
 * Rebase to Heiko's for-next branch
   - update DT patch to handle new RK3588(s) boards
   - make sure to use a clean topic branch without HDMI-RX code (Heiko Stübner)
 * Add Tested-by from Heiko Stübner

Changes since PATCHv2:
 * https://lore.kernel.org/linux-rockchip/20240919091834.83572-1-sebastian.reichel@collabora.com/
 * Rebase to 6.12-rc1 + devm_of_regulator_get_optional branch (Ulf Hansson, Chen-Yu Tsai)
  - Introduce devm_of_regulator_get()
  - Add code to only request regulators for domains needing them
 * Mention other platforms in the DT binding patch (Rob Murphy)
 * Update more RK3588 DT files (Jonas Karlman)

Changes since PATCHv1:
 * https://lore.kernel.org/all/20240910180530.47194-1-sebastian.reichel@collabora.com/
 * Collect Reviewed-by/Acked-by/Tested-by
 * swap first and second patch to avoid introducing and directly removing a mutex_unlock
 * fix spelling of indentation
 * fix double empty line after rockchip_pd_regulator_disable()

Greetings,

-- Sebastian

Sebastian Reichel (7):
  regulator: Add (devm_)of_regulator_get()
  pmdomain: rockchip: cleanup mutex handling in rockchip_pd_power
  pmdomain: rockchip: forward rockchip_do_pmu_set_power_domain errors
  pmdomain: rockchip: reduce indentation in rockchip_pd_power
  dt-bindings: power: rockchip: add regulator support
  pmdomain: rockchip: add regulator support
  arm64: dts: rockchip: Add GPU power domain regulator dependency for
    RK3588

 .../power/rockchip,power-controller.yaml      |   3 +
 .../boot/dts/rockchip/rk3588-armsom-sige7.dts |   4 +
 arch/arm64/boot/dts/rockchip/rk3588-base.dtsi |   2 +-
 .../boot/dts/rockchip/rk3588-coolpi-cm5.dtsi  |   4 +
 .../rockchip/rk3588-edgeble-neu6a-common.dtsi |   4 +
 .../boot/dts/rockchip/rk3588-evb1-v10.dts     |   4 +
 .../boot/dts/rockchip/rk3588-fet3588-c.dtsi   |   4 +
 .../rockchip/rk3588-friendlyelec-cm3588.dtsi  |   4 +
 .../arm64/boot/dts/rockchip/rk3588-jaguar.dts |   4 +
 .../boot/dts/rockchip/rk3588-nanopc-t6.dtsi   |   4 +
 .../boot/dts/rockchip/rk3588-ok3588-c.dts     |   4 +
 .../dts/rockchip/rk3588-orangepi-5-plus.dts   |   4 +
 .../boot/dts/rockchip/rk3588-quartzpro64.dts  |   4 +
 .../boot/dts/rockchip/rk3588-rock-5-itx.dts   |   4 +
 .../boot/dts/rockchip/rk3588-rock-5b.dts      |   4 +
 .../arm64/boot/dts/rockchip/rk3588-tiger.dtsi |   4 +
 .../boot/dts/rockchip/rk3588-toybrick-x0.dts  |   4 +
 .../boot/dts/rockchip/rk3588-turing-rk1.dtsi  |   4 +
 .../boot/dts/rockchip/rk3588s-coolpi-4b.dts   |   4 +
 .../dts/rockchip/rk3588s-gameforce-ace.dts    |   4 +
 .../dts/rockchip/rk3588s-indiedroid-nova.dts  |   4 +
 .../dts/rockchip/rk3588s-khadas-edge2.dts     |   4 +
 .../boot/dts/rockchip/rk3588s-nanopi-r6s.dts  |   4 +
 .../boot/dts/rockchip/rk3588s-odroid-m2.dts   |   4 +
 .../boot/dts/rockchip/rk3588s-orangepi-5.dts  |   4 +
 .../boot/dts/rockchip/rk3588s-rock-5a.dts     |   4 +
 drivers/pmdomain/rockchip/pm-domains.c        | 190 +++++++++++-------
 drivers/regulator/devres.c                    |  17 ++
 drivers/regulator/of_regulator.c              |  21 ++
 include/linux/regulator/consumer.h            |   6 +
 30 files changed, 266 insertions(+), 69 deletions(-)