linux-kernel - Re: [Xen-devel] [PATCH 1/2] xen, input: add xen-kbdfront module parameter for setting resolution

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Date:   Mon, 10 Apr 2017 15:50:08 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Oleksandr Andrushchenko <andr2000@...il.com>,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        linux-input@...r.kernel.org
Cc:     dmitry.torokhov@...il.com
Subject: Re: [Xen-devel] [PATCH 1/2] xen, input: add xen-kbdfront module
 parameter for setting resolution

On 10/04/17 15:44, Oleksandr Andrushchenko wrote:
> Hi, Juergen!
> 
> On 03/21/2017 07:19 PM, Juergen Gross wrote:
>> Add a parameter for setting the resolution of xen-kbdfront in order to
>> be able to cope with a (virtual) frame buffer of arbitrary resolution.
>>
>> Signed-off-by: Juergen Gross <jgross@...e.com>
>> ---
>>   drivers/input/misc/xen-kbdfront.c | 10 ++++++++--
>>   1 file changed, 8 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/input/misc/xen-kbdfront.c
>> b/drivers/input/misc/xen-kbdfront.c
>> index 3900875..2df5678 100644
>> --- a/drivers/input/misc/xen-kbdfront.c
>> +++ b/drivers/input/misc/xen-kbdfront.c
>> @@ -41,6 +41,12 @@ struct xenkbd_info {
>>       char phys[32];
>>   };
>>   +enum { KPARAM_WIDTH, KPARAM_HEIGHT, KPARAM_CNT };
>> +static int size[KPARAM_CNT] = { XENFB_WIDTH, XENFB_HEIGHT };
>> +module_param_array(size, int, NULL, 0444);
> is this by intention that you use 0444 here?
> It means read-only, thus one cannot change these,
> so what is the point of the module parameters then?

You can see the settings in sysfs.

The values are settable via boot parameter.


Juergen