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SubjectRe: [PATCH v2 1/9] HID: core: add "report" hook, called once the report has been parsed
Hi Benjamin,

> This callback is called when the parsing of the report has been done
> by hid-core (so after the calls to .event). The hid drivers can now
> have access to the whole report by relying on the values stored in
> the different fields.
>
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
> ---
> drivers/hid/hid-core.c | 4 ++++
> include/linux/hid.h | 2 ++
> 2 files changed, 6 insertions(+)
>
> diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> index 5ae2cb1..b671e4e 100644
> --- a/drivers/hid/hid-core.c
> +++ b/drivers/hid/hid-core.c
> @@ -1195,6 +1195,7 @@ int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
> {
> struct hid_report_enum *report_enum = hid->report_enum + type;
> struct hid_report *report;
> + struct hid_driver *hdrv;
> unsigned int a;
> int rsize, csize = size;
> u8 *cdata = data;
> @@ -1231,6 +1232,9 @@ int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
> if (hid->claimed != HID_CLAIMED_HIDRAW) {
> for (a = 0; a < report->maxfield; a++)
> hid_input_field(hid, report->field[a], cdata, interrupt);
> + hdrv = hid->driver;
> + if (hdrv && hdrv->report)
> + hdrv->report(hid, report);

I think this is more useful if called before the individual fields. In
fact, it seems raw_event() is already doing exactly that. No need for
a new callback, in other words.

> }
>
> if (hid->claimed & HID_CLAIMED_INPUT)
> diff --git a/include/linux/hid.h b/include/linux/hid.h
> index 828726c..e14b465 100644
> --- a/include/linux/hid.h
> +++ b/include/linux/hid.h
> @@ -589,6 +589,7 @@ struct hid_usage_id {
> * @raw_event: if report in report_table, this hook is called (NULL means nop)
> * @usage_table: on which events to call event (NULL means all)
> * @event: if usage in usage_table, this hook is called (NULL means nop)
> + * @report: this hook is called after parsing a report (NULL means nop)
> * @report_fixup: called before report descriptor parsing (NULL means nop)
> * @input_mapping: invoked on input registering before mapping an usage
> * @input_mapped: invoked on input registering after mapping an usage
> @@ -627,6 +628,7 @@ struct hid_driver {
> const struct hid_usage_id *usage_table;
> int (*event)(struct hid_device *hdev, struct hid_field *field,
> struct hid_usage *usage, __s32 value);
> + void (*report)(struct hid_device *hdev, struct hid_report *report);
>
> __u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
> unsigned int *size);
> --
> 1.8.1
>

Thanks,
Henrik


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