linux-kernel - Re: [PATCH v3 2/6] firmware: arm_scmi: imx: Support discovering buildinfo of MISC protocol

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Message-ID: <20250831082229.GC17728@nxa18884-linux.ap.freescale.net>
Date: Sun, 31 Aug 2025 16:22:29 +0800
From: Peng Fan <peng.fan@....nxp.com>
To: Sudeep Holla <sudeep.holla@....com>
Cc: Peng Fan <peng.fan@....com>,
	Cristian Marussi <cristian.marussi@....com>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, arm-scmi@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/6] firmware: arm_scmi: imx: Support discovering
 buildinfo of MISC protocol

On Fri, Aug 29, 2025 at 11:50:20AM +0100, Sudeep Holla wrote:
>On Wed, Aug 27, 2025 at 12:59:14PM +0800, Peng Fan wrote:
>> MISC protocol supports discovering the System Manager(SM) build
>> information including build commit, build time and etc. Retrieve the
>> information from SM.
>> 
>> Reviewed-by: Cristian Marussi <cristian.marussi@....com>
>> Signed-off-by: Peng Fan <peng.fan@....com>
>> ---
>>  .../firmware/arm_scmi/vendors/imx/imx-sm-misc.c    | 41 ++++++++++++++++++++++
>>  1 file changed, 41 insertions(+)
>> 
>> diff --git a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
>> index a8915d3b4df518719d56bfff38922625ad9b70f6..464afeae8267d8c1eca4c4d5e008eca6d741c6ff 100644
>> --- a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
>> +++ b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
>> @@ -25,6 +25,7 @@
>>  enum scmi_imx_misc_protocol_cmd {
>>  	SCMI_IMX_MISC_CTRL_SET	= 0x3,
>>  	SCMI_IMX_MISC_CTRL_GET	= 0x4,
>> +	SCMI_IMX_MISC_DISCOVER_BUILDINFO = 0x6,
>>  	SCMI_IMX_MISC_CTRL_NOTIFY = 0x8,
>>  };
>>  
>> @@ -65,6 +66,15 @@ struct scmi_imx_misc_ctrl_get_out {
>>  	__le32 val[];
>>  };
>>  
>> +struct scmi_imx_misc_buildinfo_out {
>> +	__le32 buildnum;
>> +	__le32 buildcommit;
>> +#define MISC_MAX_BUILDDATE	16
>> +	u8 builddate[MISC_MAX_BUILDDATE];
>> +#define MISC_MAX_BUILDTIME	16
>> +	u8 buildtime[MISC_MAX_BUILDTIME];
>> +};
>> +
>>  static int scmi_imx_misc_attributes_get(const struct scmi_protocol_handle *ph,
>>  					struct scmi_imx_misc_info *mi)
>>  {
>> @@ -272,6 +282,33 @@ static int scmi_imx_misc_ctrl_set(const struct scmi_protocol_handle *ph,
>>  	return ret;
>>  }
>>  
>> +static int scmi_imx_misc_discover_build_info(const struct scmi_protocol_handle *ph)
>> +{
>> +	char date[MISC_MAX_BUILDDATE], time[MISC_MAX_BUILDTIME];
>> +	struct scmi_imx_misc_buildinfo_out *out;
>> +	struct scmi_xfer *t;
>> +	int ret;
>> +
>> +	ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_DISCOVER_BUILDINFO, 0,
>> +				      sizeof(*out), &t);
>> +	if (ret)
>> +		return ret;
>> +
>> +	ret = ph->xops->do_xfer(ph, t);
>> +	if (!ret) {
>> +		out = t->rx.buf;
>> +		strscpy(date, out->builddate, MISC_MAX_BUILDDATE);
>> +		strscpy(time, out->buildtime, MISC_MAX_BUILDTIME);
>> +		dev_info(ph->dev, "SM Version\t= Build %u, Commit %08x %s %s\n",
>> +			le32_to_cpu(out->buildnum), le32_to_cpu(out->buildcommit),
>> +			date, time);
>
>And fix the alignment above, just noticed after hitting enter.

My bad, just not sure why "b4 prep --check" not report warning for this.

Thanks,
Peng

>
>-- 
>Regards,
>Sudeep