Re: [PATCH v4 09/13] media: iris: Use power domain type to look up pd_devs index

[Vikash Garodia <vikash.garodia@oss.qualcomm.com>]

On 5/5/2026 12:29 PM, Vishnu Reddy wrote:
> The pmdomain_tbl was a array of strings holding only the power domain
> names. Callers had to pass a pd_devs[] pointer indexed directly by the
> platform_pm_domain_type enum value to iris_enable_power_domains() and
> iris_disable_power_domains().
> 
> A future platform may need to introduce a new enum value that aliases
> an existing one (e.g. IRIS_VCODEC1_POWER_DOMAIN aliasing the
> IRIS_VPP0_HW_POWER_DOMAIN on Glymur), which would break the assumption
> that enum values map 1:1 to pd_devs[] indices.
> 
> To fix this, replace the string array with a new struct platform_pd_data
> that pairs each power domain name with its platform_pm_domain_type. Add
> a helper iris_get_pd_index_by_type() that walks this table and returns
> the correct pd_devs[] index for a given type.
> 
> Update iris_enable_power_domains() and iris_disable_power_domains()
> to accept a platform_pm_domain_type instead of a struct device pointer.
> They now call the helper internally to resolve the index, removing the
> need for callers to do the index lookup themselves.
> 
> This prepares the driver for adding new platforms where power domain enum
> values cannot be used directly as pd_devs[] indices.
> 
> Signed-off-by: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
> ---
>   .../platform/qcom/iris/iris_platform_common.h      |  9 +++-
>   .../media/platform/qcom/iris/iris_platform_gen1.c  | 18 +++++---
>   .../media/platform/qcom/iris/iris_platform_gen2.c  | 24 ++++++----
>   drivers/media/platform/qcom/iris/iris_probe.c      |  4 +-
>   drivers/media/platform/qcom/iris/iris_resources.c  | 44 +++++++++++++++++-
>   drivers/media/platform/qcom/iris/iris_resources.h  |  6 ++-
>   drivers/media/platform/qcom/iris/iris_vpu3x.c      |  7 ++-
>   drivers/media/platform/qcom/iris/iris_vpu4x.c      | 52 ++++++++--------------
>   drivers/media/platform/qcom/iris/iris_vpu_common.c | 23 +++++-----
>   9 files changed, 116 insertions(+), 71 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_platform_common.h b/drivers/media/platform/qcom/iris/iris_platform_common.h
> index 30e9d4d288c6..7d59e6364e9d 100644
> --- a/drivers/media/platform/qcom/iris/iris_platform_common.h
> +++ b/drivers/media/platform/qcom/iris/iris_platform_common.h
> @@ -212,6 +212,12 @@ enum platform_pm_domain_type {
>   	IRIS_APV_HW_POWER_DOMAIN,
>   };
>   
> +struct platform_pd_data {
> +	enum platform_pm_domain_type *pd_types;
> +	const char **pd_names;
> +	u32 pd_count;
> +};
> +

<snip>

>   
> -int iris_enable_power_domains(struct iris_core *core, struct device *pd_dev)
> +static int iris_get_pd_index_by_type(struct iris_core *core, enum platform_pm_domain_type pd_type)
>   {
> +	const struct platform_pd_data *pd_tbl;
> +	u32 pd_count, i;
> +
> +	pd_tbl = core->iris_platform_data->pmdomain_tbl;
> +	pd_count = core->iris_platform_data->pmdomain_tbl->pd_count;

pd_count can be dropped, use pd_tbl->pd_count instead.

with that fixed,

Reviewed-by: Vikash Garodia <vikash.garodia@oss.qualcomm.com>