HID: core: add "report" hook, called once the report has been parsed

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>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index eb2ee11b6412..754098a7dd47 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);
         }
 
         if (hid->claimed & HID_CLAIMED_INPUT)
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 7330a0fef0c0..9f56e9040f66 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);