Re: [PATCH v2 1/2] xen,input: add xen-kbdfront module parameter for setting resolution

[Oleksandr Andrushchenko]

On 04/11/2017 12:35 PM, Juergen Gross wrote:
> On 11/04/17 11:26, Oleksandr Andrushchenko wrote:
> > On 04/11/2017 11:50 AM, 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@xxxxxxxx>
> > > ---
> > >    drivers/input/misc/xen-kbdfront.c | 18 ++++++++++++++----
> > >    1 file changed, 14 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/input/misc/xen-kbdfront.c
> > > b/drivers/input/misc/xen-kbdfront.c
> > > index 3900875dec10..90e7981a7768 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 };
> > if you are about to release yet another version of the series,
> > could you please also rename "size" to "ptr_size/pointer_size/XXX",
> > so later when I add multi-touch support I can have
> > "mtouch_size" module parameter and they are consistent all together?
> Sure. After all I think I can merge the patches, as reading width and
> height a second time while connecting the device seems to be pointless.
>
> While logically patch 2 seems to correct the connection process there
> was never a problem with it being wrong: width and height would have
> been already read during probing of the device so missing to read them
> again wouldn't lead to any wrong settings.
Exactly, IMO this driver does need attention, but it
will also require changes to qemu-fb-backend if state
machine changes. This is why we still use this logic
in our backend as well
> Juergen