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authorJason Gerecke <killertofu@gmail.com>2015-07-21 11:07:23 -0700
committerJiri Kosina <jkosina@suse.com>2015-07-23 14:02:43 +0200
commit06324e0cb28e06cd7cf609d7c3099b12841a5dd6 (patch)
tree2fe8a94b455aba6f0cd6a2508d73ef9e37c3aada /drivers/hid/wacom_wac.c
parent2bdd163cfd262914e8f6152e37aebea2034f801e (diff)
downloadblackbird-op-linux-06324e0cb28e06cd7cf609d7c3099b12841a5dd6.tar.gz
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HID: wacom: Perform all event processing as part of report processing
In some cases, we need access to information before it becomes available to the 'event' handler. In particular, for some devices we cannot properly process the finger data without first knowing the "contact count" at the very end of the report (e.g. the Cintiq 24HDT touch screen, when forced through the GENERIC codepath). Since the HID subsystem doesn't provide a way to take action before 'event' is called, we take a cue from hid-multitouch.c and add a pre-process step within the 'report' handler that performs the same function. Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
Diffstat (limited to 'drivers/hid/wacom_wac.c')
-rw-r--r--drivers/hid/wacom_wac.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index f5a0d3c64520..1d9d5d1d800d 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -1437,6 +1437,12 @@ static int wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field,
return 0;
}
+static void wacom_wac_pen_pre_report(struct hid_device *hdev,
+ struct hid_report *report)
+{
+ return;
+}
+
static void wacom_wac_pen_report(struct hid_device *hdev,
struct hid_report *report)
{
@@ -1564,6 +1570,12 @@ static int wacom_wac_finger_event(struct hid_device *hdev,
return 0;
}
+static void wacom_wac_finger_pre_report(struct hid_device *hdev,
+ struct hid_report *report)
+{
+ return;
+}
+
static void wacom_wac_finger_report(struct hid_device *hdev,
struct hid_report *report)
{
@@ -1615,6 +1627,25 @@ int wacom_wac_event(struct hid_device *hdev, struct hid_field *field,
return 0;
}
+static void wacom_report_events(struct hid_device *hdev, struct hid_report *report)
+{
+ int r;
+
+ for (r = 0; r < report->maxfield; r++) {
+ struct hid_field *field;
+ unsigned count, n;
+
+ field = report->field[r];
+ count = field->report_count;
+
+ if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
+ continue;
+
+ for (n = 0; n < count; n++)
+ wacom_wac_event(hdev, field, &field->usage[n], field->value[n]);
+ }
+}
+
void wacom_wac_report(struct hid_device *hdev, struct hid_report *report)
{
struct wacom *wacom = hid_get_drvdata(hdev);
@@ -1625,6 +1656,14 @@ void wacom_wac_report(struct hid_device *hdev, struct hid_report *report)
return;
if (WACOM_PEN_FIELD(field))
+ wacom_wac_pen_pre_report(hdev, report);
+
+ if (WACOM_FINGER_FIELD(field))
+ wacom_wac_finger_pre_report(hdev, report);
+
+ wacom_report_events(hdev, report);
+
+ if (WACOM_PEN_FIELD(field))
return wacom_wac_pen_report(hdev, report);
if (WACOM_FINGER_FIELD(field))
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