linux-kernel - Re: [PATCH 1/3] HID: make raw reports possible for both feature and output reports

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Message-ID: <alpine.LNX.2.00.1002031536220.15395@pobox.suse.cz>
Date:	Wed, 3 Feb 2010 15:37:06 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	Bastien Nocera <hadess@...ess.net>,
	Michael Poole <mdpoole@...ilus.org>,
	"Gunn, Brian" <bgunn@...ekai.com>, Ping <pinglinux@...il.com>,
	linux-kernel@...r.kernel.org,
	BlueZ development <linux-bluetooth@...r.kernel.org>
Subject: Re: [PATCH 1/3] HID: make raw reports possible for both feature and
 output reports

On Wed, 3 Feb 2010, Marcel Holtmann wrote:

> > In commit 2da31939a42 ("Bluetooth: Implement raw output support for HIDP
> > layer"), support for Bluetooth hid_output_raw_report was added, but it
> > pushes the data to the intr socket instead of the ctrl one. This has been
> > fixed by 6bf8268f9a91f1 ("Bluetooth: Use the control channel for raw HID reports")
> > 
> > Still, it is necessary to distinguish whether the report in question should be
> > either FEATURE or OUTPUT. For this, we have to extend the generic HID API,
> > so that hid_output_raw_report() callback provides means to specify this
> > value so that it can be passed down to lower level hardware drivers (currently
> > Bluetooth and USB).
> > 
> > Based on original patch by Bastien Nocera <hadess@...ess.net>
> > Signed-off-by: Jiri Kosina <jkosina@...e.cz>
> > ---
> >  drivers/hid/hidraw.c          |    2 +-
> >  drivers/hid/usbhid/hid-core.c |    5 +++--
> >  include/linux/hid.h           |    2 +-
> >  net/bluetooth/hidp/core.c     |   13 ++++++++++---
> >  4 files changed, 15 insertions(+), 7 deletions(-)
> 
> Acked-by: Marcel Holtmann <marcel@...tmann.org>
>  
> > -static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count)
> > +static int hidp_output_raw_report(struct hid_device *hid, unsigned char *data, size_t count,
> > +		unsigned char report_type)
> >  {
> > -	if (hidp_send_ctrl_message(hid->driver_data,
> > -			HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE,
> > +	if (report_type == HID_FEATURE_REPORT)
> > +		report_type = HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE;
> > +	else if (report_type == HID_OUTPUT_REPORT)
> > +		report_type = HIDP_TRANS_DATA | HIDP_DATA_RTYPE_OUPUT;
> > +	else
> > +		return -EINVAL;
> 
> If you wanna be a little bit more readable, then using a switch
> statement helps instead of else if. Just my 2 cents.

I have converted this to switch, added your Acked-by and queued in my 
tree.

Thanks Marcel.

-- 
Jiri Kosina
SUSE Labs, Novell Inc.
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