ACK: [PATCH V2 0/2][SRU][Mantic] Support mipi camera on Intel Meteor Lake platform

[Roxana Nicolescu]

On 25/10/2023 18:06, You-Sheng Yang wrote:
> BugLink: https://bugs.launchpad.net/bugs/2031412
>
> [Impact]
>
> Need kernel driver fixes for int3472/iommu for Intel IPU6 platform on MTL.
>
> [Fix]
>
> Two fixes in need. One, we need IOMMU passthrough for MTL platform. The other,
> fix is for handshake pin support for Lattice MIPI aggregator.
>
> The Intel IPU6 camera drivers are not yet all upstreamed yet. So far
> Intel VSC, LJCA (the previous MIPI aggregator for ADL/RPL platforms) are
> in v6.6 already, and IPU6 ISYS is under upstream review. More components
> to come according to Intel.
>
> These two fixes are therefore for related components for not-yet fully
> upstreamed IPU6 as needed for out-of-tree dkms drivers.
>
> [Test Case]
>
> ```
> $ sudo dmesg | grep "Passthrough IOMMU for integrated Intel IPU"
> $ sudo dmesg | grep int3472
> # should have no "int3472-discrete INT3472:0c: GPIO type 0x12 unknown; the sensor may not work"
> ```
>
> [Where problems could occur]
>
> IOMMU Passthrough as necessary to enable IPU6 on Intel platforms, and it has
> been patching a few generations e.g. Bug 1989041 for Raptor Lake, Bug 1958004
> for TGL and ADL. As IPU is not an external facing device which is not risky.
>
> For INT3472, the proposed patch might receive further updates per current
> upstream reviewers' opinions.
>
> [Other Info]
>
> Nominated for linux/mantic and oem-6.5/jammy as they're for MTL.
>
> --
> V2: no change resubmit with additional details to the current
> upstream status of Intel IPU6 drivers.
> --
> Hao Yao (1):
>    UBUNTU: SAUCE: platform/x86: int3472: Add handshake GPIO function
>
> You-Sheng Yang (1):
>    UBUNTU: SAUCE: iommu: intel-ipu: use IOMMU passthrough mode for Intel
>      IPUs on Meteor Lake
>
>   drivers/iommu/intel/iommu.c                   | 1 +
>   drivers/platform/x86/intel/int3472/common.h   | 1 +
>   drivers/platform/x86/intel/int3472/discrete.c | 5 +++++
>   3 files changed, 7 insertions(+)
>
Acked-by: Roxana Nicolescu <roxana.nicolescu at canonical.com>