linux-kernel - Re: [PATCH v2 2/3] soc: qcom: socinfo: Add support for new fields in revision 21

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Message-ID: <mc6n7fbhjhe6cxyoqkxs23kjs7gsa5cihy6qwrcrnz4g3kwjms@vh3vfqzfprw2>
Date: Fri, 25 Apr 2025 20:28:51 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Mukesh Ojha <mukesh.ojha@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] soc: qcom: socinfo: Add support for new fields in
 revision 21

On Fri, Apr 25, 2025 at 07:29:45PM +0530, Mukesh Ojha wrote:
> Add the subpartfeature offset field to the socinfo structure
> which came for version 21 of socinfo structure.
> 
> Subpart_feat_offset is subpart like camera, display, etc.,
> and its internal feature available on a bin.
> 
> Signed-off-by: Mukesh Ojha <mukesh.ojha@....qualcomm.com>
> ---
> Changes in v2:
>  - Added debugfs entry and described more about the field in commit.
> 
>  drivers/soc/qcom/socinfo.c       | 6 ++++++
>  include/linux/soc/qcom/socinfo.h | 2 ++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
> index 5800ebf9ceea..bac1485f1b27 100644
> --- a/drivers/soc/qcom/socinfo.c
> +++ b/drivers/soc/qcom/socinfo.c
> @@ -154,6 +154,7 @@ struct socinfo_params {
>  	u32 boot_cluster;
>  	u32 boot_core;
>  	u32 raw_package_type;
> +	u32 nsubpart_feat_array_offset;
>  };
>  
>  struct smem_image_version {
> @@ -608,6 +609,11 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
>  			   &qcom_socinfo->info.fmt);
>  
>  	switch (qcom_socinfo->info.fmt) {
> +	case SOCINFO_VERSION(0, 21):
> +		qcom_socinfo->info.nsubpart_feat_array_offset =
> +				   __le32_to_cpu(info->nsubpart_feat_array_offset);
> +		debugfs_create_u32("nsubpart_feat_array_offset", 0444, qcom_socinfo->dbg_root,
> +				   &qcom_socinfo->info.nsubpart_feat_array_offset);

An offset into what? If this provides additional data, then the data
should be visible in the debugfs. Not sure, what's the point in dumping
the offset here.

>  	case SOCINFO_VERSION(0, 20):
>  		qcom_socinfo->info.raw_package_type = __le32_to_cpu(info->raw_package_type);
>  		debugfs_create_u32("raw_package_type", 0444, qcom_socinfo->dbg_root,
> diff --git a/include/linux/soc/qcom/socinfo.h b/include/linux/soc/qcom/socinfo.h
> index c4dae173cc30..3666870b7988 100644
> --- a/include/linux/soc/qcom/socinfo.h
> +++ b/include/linux/soc/qcom/socinfo.h
> @@ -84,6 +84,8 @@ struct socinfo {
>  	__le32 boot_core;
>  	/* Version 20 */
>  	__le32 raw_package_type;
> +	/* Version 21 */
> +	__le32 nsubpart_feat_array_offset;
>  };
>  
>  /* Internal feature codes */
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry