Re: [PATCH v2 3/7] media: iris: add iris vpu bus support and register it with iommu_buses

[Krzysztof Kozlowski <krzk@kernel.org>]

On 27/02/2026 15:11, Vikash Garodia wrote:
> Add iris vpu bus support and hooks the new bus into the iommu_buses
> list. Iris devices need their own bus so that each iris device can run
> its own dma_configure() logic.
> 
> Co-developed-by: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
> Signed-off-by: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
> Signed-off-by: Vikash Garodia <vikash.garodia@oss.qualcomm.com>
> ---
>  drivers/iommu/iommu.c                           |  4 ++++
>  drivers/media/platform/qcom/iris/Makefile       |  4 ++++
>  drivers/media/platform/qcom/iris/iris_vpu_bus.c | 32 +++++++++++++++++++++++++
>  include/linux/iris_vpu_bus.h                    | 13 ++++++++++
>  4 files changed, 53 insertions(+)
> 
> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
> index 35db5178095404fec87cd0f18e44ea97cf354e78..fd5fb7c10da22ab548d359ca1f44504acc3d646c 100644
> --- a/drivers/iommu/iommu.c
> +++ b/drivers/iommu/iommu.c
> @@ -13,6 +13,7 @@
>  #include <linux/bug.h>
>  #include <linux/types.h>
>  #include <linux/init.h>
> +#include <linux/iris_vpu_bus.h>
>  #include <linux/export.h>
>  #include <linux/slab.h>
>  #include <linux/errno.h>
> @@ -178,6 +179,9 @@ static const struct bus_type * const iommu_buses[] = {
>  #ifdef CONFIG_CDX_BUS
>  	&cdx_bus_type,
>  #endif
> +#if IS_ENABLED(CONFIG_VIDEO_QCOM_IRIS)
> +	&iris_vpu_bus_type,
> +#endif
>  };
>  
>  /*
> diff --git a/drivers/media/platform/qcom/iris/Makefile b/drivers/media/platform/qcom/iris/Makefile
> index 2abbd3aeb4af07e52bf372a4b2f352463529c92c..6f4052b98491aeddc299669334d4c93e9a3420e4 100644
> --- a/drivers/media/platform/qcom/iris/Makefile
> +++ b/drivers/media/platform/qcom/iris/Makefile
> @@ -31,3 +31,7 @@ qcom-iris-objs += iris_platform_gen1.o
>  endif
>  
>  obj-$(CONFIG_VIDEO_QCOM_IRIS) += qcom-iris.o
> +
> +ifdef CONFIG_VIDEO_QCOM_IRIS
> +obj-y += iris_vpu_bus.o
> +endif
> diff --git a/drivers/media/platform/qcom/iris/iris_vpu_bus.c b/drivers/media/platform/qcom/iris/iris_vpu_bus.c
> new file mode 100644
> index 0000000000000000000000000000000000000000..34ce78d9b0ff1feda15ba4f060a56d02749a0858
> --- /dev/null
> +++ b/drivers/media/platform/qcom/iris/iris_vpu_bus.c
> @@ -0,0 +1,32 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2026 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#include <linux/device.h>
> +#include <linux/of_device.h>
> +
> +#include "iris_platform_common.h"
> +
> +static int iris_vpu_bus_dma_configure(struct device *dev)
> +{
> +	struct iris_context_bank *cb = dev_get_drvdata(dev);
> +
> +	if (!cb)
> +		return -ENODEV;
> +
> +	return of_dma_configure_id(dev, dev->parent->of_node, true, &cb->f_id);


Apply this patch and build it. Does it build?

Best regards,
Krzysztof