linux-kernel - Re: [PATCH] HID: sensor-hub: Enable hid core report processing for all devices

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Message-ID: <20231220145229.020abe62@jic23-huawei>
Date: Wed, 20 Dec 2023 14:52:29 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Yauhen Kharuzhy <jekhor@...il.com>
Cc: linux-input@...r.kernel.org, linux-iio@...r.kernel.org, Daniel Thompson
 <daniel.thompson@...aro.org>, linux-kernel@...r.kernel.org, Jiri Kosina
 <jikos@...nel.org>, Srinivas Pandruvada
 <srinivas.pandruvada@...ux.intel.com>, Benjamin Tissoires
 <benjamin.tissoires@...hat.com>
Subject: Re: [PATCH] HID: sensor-hub: Enable hid core report processing for
 all devices

On Wed, 20 Dec 2023 01:15:03 +0200
Yauhen Kharuzhy <jekhor@...il.com> wrote:

> After the commit 666cf30a589a ("HID: sensor-hub: Allow multi-function
> sensor devices") hub devices are claimed by hidraw driver in hid_connect().
> This causes stoppping of processing HID reports by hid core due to
> optimization.
> 
> In such case, the hid-sensor-custom driver cannot match a known custom
> sensor in hid_sensor_custom_get_known() because it try to check custom
> properties which weren't filled from the report because hid core didn't
> parsed it.
> 
> As result, custom sensors like hinge angle sensor and LISS sensors
> don't work.
> 
> Mark the sensor hub devices claimed by some driver to avoid hidraw-related
> optimizations.
> 
> Signed-off-by: Yauhen Kharuzhy <jekhor@...il.com>
Fixes tag?

> ---
>  drivers/hid/hid-sensor-hub.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
> index 2eba152e8b90..26e93a331a51 100644
> --- a/drivers/hid/hid-sensor-hub.c
> +++ b/drivers/hid/hid-sensor-hub.c
> @@ -632,7 +632,7 @@ static int sensor_hub_probe(struct hid_device *hdev,
>  	}
>  	INIT_LIST_HEAD(&hdev->inputs);
>  
> -	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
> +	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT | HID_CONNECT_DRIVER);
>  	if (ret) {
>  		hid_err(hdev, "hw start failed\n");
>  		return ret;