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* [PATCH] HID: Recognize sensors with application collections too.
@ 2022-12-17  7:26 Aditya Garg
  2023-01-10  8:55 ` [PATCH RESEND] " Aditya Garg
  0 siblings, 1 reply; 8+ messages in thread
From: Aditya Garg @ 2022-12-17  7:26 UTC (permalink / raw)
  To: Jiri Kosina, jkosina@suse.cz, benjamin.tissoires@redhat.com,
	jic23@kernel.org, srinivas.pandruvada@linux.intel.com,
	linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-iio@vger.kernel.org
  Cc: Orlando Chamberlain

From: Ronald Tschalär <ronald@innovation.ch>

According to HUTRR39 logical sensor devices may be nested inside
physical collections or may be specified in multiple top-level
application collections (see page 59, strategies 1 and 2). However,
the current code was only recognizing those with physical collections.

This issue turned up in recent MacBook Pro's which define the ALS in
a top-level application collection.

Signed-off-by: Ronald Tschalär <ronald@innovation.ch>
Signed-off-by: Aditya Garg <gargaditya08@live.com>
---
 drivers/hid/hid-core.c       | 3 ++-
 drivers/hid/hid-sensor-hub.c | 6 ++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index b7f5566e338d..8fcd663b10e2 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -804,7 +804,8 @@ static void hid_scan_collection(struct hid_parser *parser, unsigned type)
 	int i;
 
 	if (((parser->global.usage_page << 16) == HID_UP_SENSOR) &&
-	    type == HID_COLLECTION_PHYSICAL)
+	    (type == HID_COLLECTION_PHYSICAL ||
+	     type == HID_COLLECTION_APPLICATION))
 		hid->group = HID_GROUP_SENSOR_HUB;
 
 	if (hid->vendor == USB_VENDOR_ID_MICROSOFT &&
diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index 6abd3e2a9094..d03dc4ca095f 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -397,7 +397,8 @@ int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 		for (i = 0; i < report->maxfield; ++i) {
 			field = report->field[i];
 			if (field->maxusage) {
-				if (field->physical == usage_id &&
+				if ((field->physical == usage_id ||
+				     field->application == usage_id) &&
 					(field->logical == attr_usage_id ||
 					field->usage[0].hid ==
 							attr_usage_id) &&
@@ -506,7 +507,8 @@ static int sensor_hub_raw_event(struct hid_device *hdev,
 					collection->usage);
 
 		callback = sensor_hub_get_callback(hdev,
-				report->field[i]->physical,
+				report->field[i]->physical ?:
+					report->field[i]->application,
 				report->field[i]->usage[0].collection_index,
 				&hsdev, &priv);
 		if (!callback) {
-- 
2.38.1


^ permalink raw reply related	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2023-01-18  9:37 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-12-17  7:26 [PATCH] HID: Recognize sensors with application collections too Aditya Garg
2023-01-10  8:55 ` [PATCH RESEND] " Aditya Garg
2023-01-10  8:57   ` [PATCH v2] " Aditya Garg
2023-01-10 22:16     ` srinivas pandruvada
2023-01-11 10:06       ` Aditya Garg
2023-01-11 10:07     ` [PATCH v3] HID: Recognize sensors with application collections Aditya Garg
2023-01-11 16:59       ` srinivas pandruvada
2023-01-18  8:54       ` Jiri Kosina

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