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Message-ID: <950d627dc280af94a1073da7938a6f2a09e31e34.camel@linux.intel.com>
Date: Thu, 18 Dec 2025 07:54:44 -0800
From: srinivas pandruvada <srinivas.pandruvada@...ux.intel.com>
To: Vishnu Sankar <vishnuocv@...il.com>, jikos@...nel.org,
bentiss@...nel.org, vsankar@...ovo.com, "Zhang, Lixu"
<lixu.zhang@...el.com>, Even Xu <even.xu@...el.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org, Mark Pearson
<mpearson-lenovo@...ebb.ca>, Richie Roy Jayme <rjayme.jp@...il.com>
Subject: Re: [PATCH] HID: intel-ish-hid: loader: Add PRODUCT_FAMILY-based
firmware matching
+ Lixu
+ Even
On Thu, 2025-12-18 at 23:00 +0900, Vishnu Sankar wrote:
> Add support for firmware filenames that include the CRC32 checksum of
> the
> DMI product_family field. Several OEMs ship ISH firmware variants
> shared
> across a product family while product_name or product_sku may differ.
> This
> intermediate matching granularity reduces duplication and improves
> firmware
> selection for vendor-customized platforms.
>
> The newly supported filename forms are checked before existing
> patterns:
>
> ish_${gen}_${vendor}_${family}_${name}_${sku}.bin
> ish_${gen}_${vendor}_${family}_${sku}.bin
> ish_${gen}_${vendor}_${family}_${name}.bin
> ish_${gen}_${vendor}_${family}.bin
>
> The legacy product_name/product_sku rules remain unchanged and
> continue
> to provide fallback matching.
>
> ISH_FW_FILENAME_LEN_MAX is changed to 72 to accommodate the
> product_family.
>
> Tested with X9 series and X1 series.
>
> Reviewed-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
> Tested-by: Richie Roy Jayme <rjayme.jp@...il.com>
> Signed-off-by: Vishnu Sankar <vishnuocv@...il.com>
> ---
> drivers/hid/intel-ish-hid/ishtp/loader.c | 50
> +++++++++++++++++++++++-
> 1 file changed, 48 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hid/intel-ish-hid/ishtp/loader.c
> b/drivers/hid/intel-ish-hid/ishtp/loader.c
> index f34086b29cf0..4559d460fd83 100644
> --- a/drivers/hid/intel-ish-hid/ishtp/loader.c
> +++ b/drivers/hid/intel-ish-hid/ishtp/loader.c
> @@ -194,6 +194,11 @@ static int prepare_dma_bufs(struct ishtp_device
> *dev,
>
> return 0;
> }
> +/* Patterns with PRODUCT_FAMILY */
> +#define ISH_FW_FILE_VENDOR_FAMILY_NAME_SKU_FMT
> "intel/ish/ish_%s_%08x_%08x_%08x_%08x.bin"
> +#define ISH_FW_FILE_VENDOR_FAMILY_SKU_FMT
> "intel/ish/ish_%s_%08x_%08x_%08x.bin"
> +#define ISH_FW_FILE_VENDOR_FAMILY_NAME_FMT
> "intel/ish/ish_%s_%08x_%08x_%08x.bin"
> +#define ISH_FW_FILE_VENDOR_FAMILY_FMT
> "intel/ish/ish_%s_%08x_%08x.bin"
>
> #define ISH_FW_FILE_VENDOR_NAME_SKU_FMT
> "intel/ish/ish_%s_%08x_%08x_%08x.bin"
> #define ISH_FW_FILE_VENDOR_SKU_FMT "intel/ish/ish_%s_%08x_%08x.bin"
> @@ -201,7 +206,7 @@ static int prepare_dma_bufs(struct ishtp_device
> *dev,
> #define ISH_FW_FILE_VENDOR_FMT "intel/ish/ish_%s_%08x.bin"
> #define ISH_FW_FILE_DEFAULT_FMT "intel/ish/ish_%s.bin"
>
> -#define ISH_FW_FILENAME_LEN_MAX 56
> +#define ISH_FW_FILENAME_LEN_MAX 72
>
> #define ISH_CRC_INIT (~0u)
> #define ISH_CRC_XOROUT (~0u)
> @@ -256,8 +261,9 @@ static int request_ish_firmware(const struct
> firmware **firmware_p,
> struct device *dev)
> {
> const char *gen, *sys_vendor, *product_name, *product_sku;
> + const char *product_family;
> struct ishtp_device *ishtp = dev_get_drvdata(dev);
> - u32 vendor_crc, name_crc, sku_crc;
> + u32 vendor_crc, name_crc, sku_crc, family_crc;
> char filename[ISH_FW_FILENAME_LEN_MAX];
> int ret;
>
> @@ -265,6 +271,7 @@ static int request_ish_firmware(const struct
> firmware **firmware_p,
> sys_vendor = dmi_get_system_info(DMI_SYS_VENDOR);
> product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
> product_sku = dmi_get_system_info(DMI_PRODUCT_SKU);
> + product_family = dmi_get_system_info(DMI_PRODUCT_FAMILY);
>
> if (sys_vendor)
> vendor_crc = crc32(ISH_CRC_INIT, sys_vendor,
> strlen(sys_vendor)) ^ ISH_CRC_XOROUT;
> @@ -272,6 +279,45 @@ static int request_ish_firmware(const struct
> firmware **firmware_p,
> name_crc = crc32(ISH_CRC_INIT, product_name,
> strlen(product_name)) ^ ISH_CRC_XOROUT;
> if (product_sku)
> sku_crc = crc32(ISH_CRC_INIT, product_sku,
> strlen(product_sku)) ^ ISH_CRC_XOROUT;
> + if (product_family)
> + family_crc = crc32(ISH_CRC_INIT, product_family,
> strlen(product_family)) ^ ISH_CRC_XOROUT;
> +
> + /* PRODUCT_FAMILY-extended matching */
> + if (sys_vendor && product_family && product_name &&
> product_sku) {
> + snprintf(filename, sizeof(filename),
> + ISH_FW_FILE_VENDOR_FAMILY_NAME_SKU_FMT,
> + gen, vendor_crc, family_crc, name_crc,
> sku_crc);
> + ret = _request_ish_firmware(firmware_p, filename,
> dev);
> + if (!ret)
> + return 0;
> + }
> +
> + if (sys_vendor && product_family && product_sku) {
> + snprintf(filename, sizeof(filename),
> + ISH_FW_FILE_VENDOR_FAMILY_SKU_FMT,
> + gen, vendor_crc, family_crc, sku_crc);
> + ret = _request_ish_firmware(firmware_p, filename,
> dev);
> + if (!ret)
> + return 0;
> + }
> +
> + if (sys_vendor && product_family && product_name) {
> + snprintf(filename, sizeof(filename),
> + ISH_FW_FILE_VENDOR_FAMILY_NAME_FMT,
> + gen, vendor_crc, family_crc, name_crc);
> + ret = _request_ish_firmware(firmware_p, filename,
> dev);
> + if (!ret)
> + return 0;
> + }
> +
> + if (sys_vendor && product_family) {
> + snprintf(filename, sizeof(filename),
> + ISH_FW_FILE_VENDOR_FAMILY_FMT,
> + gen, vendor_crc, family_crc);
> + ret = _request_ish_firmware(firmware_p, filename,
> dev);
> + if (!ret)
> + return 0;
> +}
>
> if (sys_vendor && product_name && product_sku) {
> snprintf(filename, sizeof(filename),
> ISH_FW_FILE_VENDOR_NAME_SKU_FMT, gen,
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