Re: [PATCH v7 01/12] media: iris: Add iris vpu bus support

[Dmitry Baryshkov]

On Wed, Jun 03, 2026 at 07:48:39PM +0530, Vishnu Reddy wrote:
> From: Vikash Garodia <vikash.garodia@xxxxxxxxxxxxxxxx>
> 
> On glymur platform, firmware loading needs a separate IOMMU mapping with
> its own stream ID. This stream ID is defined in the device tree with the
> associated firmware function ID in the iommu-map property. To create this
> mapping, a separate child device is needed so the firmware memory can be
> isolated in its own IOMMU context.
> 
> Introduce a new bus called iris-vpu-bus. This creates a dynamic device,
> and its dma_configure() callback calls of_dma_configure_id() with the
> function ID provided by the client to map the corresponding stream ID.
> This sets up a dedicated IOMMU context for the child device.
> 
> Reviewed-by: Vishnu Reddy <busanna.reddy@xxxxxxxxxxxxxxxx>
> Signed-off-by: Vikash Garodia <vikash.garodia@xxxxxxxxxxxxxxxx>
> Signed-off-by: Vishnu Reddy <busanna.reddy@xxxxxxxxxxxxxxxx>
> ---
>  MAINTAINERS                                     |  1 +
>  drivers/media/platform/qcom/iris/Kconfig        |  4 ++
>  drivers/media/platform/qcom/iris/Makefile       |  1 +
>  drivers/media/platform/qcom/iris/iris_vpu_bus.c | 61 +++++++++++++++++++++++++
>  include/linux/iris_vpu_bus.h                    | 25 ++++++++++
>  5 files changed, 92 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>


-- 
With best wishes
Dmitry