[0/7] camss: Fixup multiple VDDA regulator support

Message

Bryan O'Donoghue Jan. 6, 2022, 11:55 p.m. UTC

Following on from comments from Vladimir on the sm8250 CAMSS patches I had
a look through the RB3 and RB5 schematics.

Here we see the CSI PHY connects to the same VDDA power-rails as USB, PCIe,
UFS and the DSI PHYs.

Right now CAMSS works on SDM845 and SM8250 because one of the USB, PCIe,
or UFS has enabled the relevant VDDA supplies, prior to the CAMSS driver
running.

The solution is to
- Fix the describing YAML
- Add in regulator_bulk_enable()/regulator_bulk_disable()
- Update the DTS to point at the necessary regulators

I have an SDM660 board on-order so when it arrives I can also look into the
vdda_sec regulator if nobody else has.

For now this series addresses the fundamental gap in the CSI PHY power
rails and remediates the situation for the two boards I have schematics for
and can test, RB3/SDM845 and RB5/SM8250.

This patch applies on top of
git.linuxtv.org/hverkuil/media_tree.git  / br-v5.17j

Bootable and testable tree for both RB3 and RB5 here:
git.linaro.org/people/bryan.odonoghue/kernel.git / br-v5.17j+camss-fixes

Bryan O'Donoghue (7):
  media: dt-bindings: media: camss: Fixup vdda regulator descriptions
    sdm845
  media: dt-bindings: media: camss: Add vdda supply declarations sm8250
  arm64: dts: qcom: sdm845: Rename camss vdda-supply to vdda-phy-supply
  arm64: dts: qcom: sdm845: Add camss vdda-pll-supply
  media: camss: Add regulator_bulk support
  media: camss: Point sdm845 at the correct vdda regulators
  media: camss: Point sm8250 at the correct vdda regulators

 .../bindings/media/qcom,sdm845-camss.yaml     | 14 ++-
 .../bindings/media/qcom,sm8250-camss.yaml     | 13 +++
 arch/arm64/boot/dts/qcom/sdm845-db845c.dts    |  3 +-
 .../media/platform/qcom/camss/camss-csid.c    | 40 +++++---
 .../media/platform/qcom/camss/camss-csid.h    |  3 +-
 drivers/media/platform/qcom/camss/camss.c     | 94 +++++++++----------
 drivers/media/platform/qcom/camss/camss.h     |  2 +-
 7 files changed, 100 insertions(+), 69 deletions(-)