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

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

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?
> +module_param_array(size, int, NULL, 0444);
> +MODULE_PARM_DESC(size,
> +       "Pointing device width, height in pixels (default 800,600)");
> +
>   static int xenkbd_remove(struct xenbus_device *);
>   static int xenkbd_connect_backend(struct xenbus_device *, struct xenkbd_info 
> *);
>   static void xenkbd_disconnect_backend(struct xenkbd_info *);
> @@ -174,8 +180,8 @@ static int xenkbd_probe(struct xenbus_device *dev,
>   
>   	if (abs) {
>                 __set_bit(EV_ABS, ptr->evbit);
> -               input_set_abs_params(ptr, ABS_X, 0, XENFB_WIDTH, 0, 0);
> -               input_set_abs_params(ptr, ABS_Y, 0, XENFB_HEIGHT, 0, 0);
> +               input_set_abs_params(ptr, ABS_X, 0, size[KPARAM_WIDTH], 0, 0);
> +               input_set_abs_params(ptr, ABS_Y, 0, size[KPARAM_HEIGHT], 0, 0);
>         } else {
>                 input_set_capability(ptr, EV_REL, REL_X);
>                 input_set_capability(ptr, EV_REL, REL_Y);
> @@ -344,12 +350,16 @@ static void xenkbd_backend_changed(struct xenbus_device 
> *dev,
>   
>   		/* Set input abs params to match backend screen res */
>                 if (xenbus_scanf(XBT_NIL, info->xbdev->otherend,
> -                                "width", "%d", &val) > 0)
> +                                "width", "%d", &val) > 0) {
>                         input_set_abs_params(info->ptr, ABS_X, 0, val, 0, 0);
> +                       size[KPARAM_WIDTH] = val;
> +               }
>   
>   		if (xenbus_scanf(XBT_NIL, info->xbdev->otherend,
> -                                "height", "%d", &val) > 0)
> +                                "height", "%d", &val) > 0) {
>                         input_set_abs_params(info->ptr, ABS_Y, 0, val, 0, 0);
> +                       size[KPARAM_HEIGHT] = val;
> +               }
>   
>   		break;
>   
Thank you,
Oleksandr

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