[v6,0/2] Add support for ANX7688

ANX7688 is a typec port controller that also converts HDMI to DP.
ANX7688 is found on Acer Chromebook R13 (elm) and on Pine64 PinePhone.

On Acer Chromebook R13 (elm), the device is powered-up and controller by the
Embedded Controller. Therefore its operation is transparent
to the SoC. It is used in elm only as a display bridge driver.
The bridge driver only reads some values using i2c and use them to
implement the mode_fixup cb.

On v5 we added the full dt-binding of the generic Analogix anx7688 device.
The problem is that for elm, most of the fields are not needed since
the anx7688 sits behind the EC. After a discussion on v5 (see [1])
we decided to go back to the original approach and send the dt binding
as specific to the elm. So in this version we rename the device to cros_ec_anx7688
and use the compatible 'google,cros-ec-anx7688'.

[1] https://patchwork.kernel.org/project/dri-devel/patch/20210305124351.15079-3-dafna.hirschfeld@collabora.com/

Changes since v5:
* treat the device as a specific combination of an ANX7688 behind the EC and
call it 'cros-ec-anx7688'

Changes since v4:
In v4 of this set, the device was added as an 'mfd' device
and an additional 'bridge' device for the HDMI-DP conversion, see [2].

[2] https://lkml.org/lkml/2020/3/18/64

Dafna Hirschfeld (1):
  dt-bindings: display: add google,cros-ec-anx7688.yaml

Enric Balletbo i Serra (1):
  drm/bridge: Add ChromeOS EC ANX7688 bridge driver support

 .../bridge/google,cros-ec-anx7688.yaml        |  82 ++++++++
 drivers/gpu/drm/bridge/Kconfig                |  12 ++
 drivers/gpu/drm/bridge/Makefile               |   1 +
 drivers/gpu/drm/bridge/cros-ec-anx7688.c      | 191 ++++++++++++++++++
 4 files changed, 286 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/google,cros-ec-anx7688.yaml
 create mode 100644 drivers/gpu/drm/bridge/cros-ec-anx7688.c

Hi, pinging here, can one of the kernel bridge maintainers review this patchset?

Thanks,
Dafna

On 09.04.21 18:19, Dafna Hirschfeld wrote:
> ANX7688 is a typec port controller that also converts HDMI to DP.
> ANX7688 is found on Acer Chromebook R13 (elm) and on Pine64 PinePhone.
> 
> On Acer Chromebook R13 (elm), the device is powered-up and controller by the
> Embedded Controller. Therefore its operation is transparent
> to the SoC. It is used in elm only as a display bridge driver.
> The bridge driver only reads some values using i2c and use them to
> implement the mode_fixup cb.
> 
> On v5 we added the full dt-binding of the generic Analogix anx7688 device.
> The problem is that for elm, most of the fields are not needed since
> the anx7688 sits behind the EC. After a discussion on v5 (see [1])
> we decided to go back to the original approach and send the dt binding
> as specific to the elm. So in this version we rename the device to cros_ec_anx7688
> and use the compatible 'google,cros-ec-anx7688'.
> 
> [1] https://patchwork.kernel.org/project/dri-devel/patch/20210305124351.15079-3-dafna.hirschfeld@collabora.com/
> 
> Changes since v5:
> * treat the device as a specific combination of an ANX7688 behind the EC and
> call it 'cros-ec-anx7688'
> 
> Changes since v4:
> In v4 of this set, the device was added as an 'mfd' device
> and an additional 'bridge' device for the HDMI-DP conversion, see [2].
> 
> [2] https://lkml.org/lkml/2020/3/18/64
> 
> Dafna Hirschfeld (1):
>    dt-bindings: display: add google,cros-ec-anx7688.yaml
> 
> Enric Balletbo i Serra (1):
>    drm/bridge: Add ChromeOS EC ANX7688 bridge driver support
> 
>   .../bridge/google,cros-ec-anx7688.yaml        |  82 ++++++++
>   drivers/gpu/drm/bridge/Kconfig                |  12 ++
>   drivers/gpu/drm/bridge/Makefile               |   1 +
>   drivers/gpu/drm/bridge/cros-ec-anx7688.c      | 191 ++++++++++++++++++
>   4 files changed, 286 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/display/bridge/google,cros-ec-anx7688.yaml
>   create mode 100644 drivers/gpu/drm/bridge/cros-ec-anx7688.c
>