Re: [Xen-devel] [PATCH v3] xen, input: try to read screen resolution for xen-kbdfront

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

Ping as I am also interested in modifying kbdfront...

On 02/09/2017 03:45 PM, Juergen Gross wrote:
> On 30/01/17 16:10, Juergen Gross wrote:
> > Instead of using the default resolution of 800*600 for the pointing
> > device of xen-kbdfront try to read the resolution of the (virtual)
> > framebuffer device. Use the default as fallback only.
> >
> > Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> Ping?
>
> > ---
> > V3: add case of late framebuffer registration (Oleksandr Andrushchenko)
> > V2: get framebuffer resolution only if CONFIG_FB (Dmitry Torokhov)
> > ---
> >   drivers/input/misc/xen-kbdfront.c | 46 ++++++++++++++++++++++++++++++++++++---
> >   1 file changed, 43 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/input/misc/xen-kbdfront.c 
> > b/drivers/input/misc/xen-kbdfront.c
> > index 3900875..9a20800 100644
> > --- a/drivers/input/misc/xen-kbdfront.c
> > +++ b/drivers/input/misc/xen-kbdfront.c
> > @@ -16,6 +16,7 @@
> >   #include <linux/kernel.h>
> >   #include <linux/errno.h>
> >   #include <linux/module.h>
> > +#include <linux/fb.h>
> >   #include <linux/input.h>
> >   #include <linux/slab.h>
> >   
> > @@ -39,6 +40,9 @@ struct xenkbd_info {
> >         int irq;
> >         struct xenbus_device *xbdev;
> >         char phys[32];
> > +#ifdef CONFIG_FB_NOTIFY
> > +       struct notifier_block nb;
> > +#endif
> >   };
> >   
> >   static int xenkbd_remove(struct xenbus_device *);
> > @@ -105,10 +109,29 @@ static irqreturn_t input_handler(int rq, void *dev_id)
> >         return IRQ_HANDLED;
> >   }
> >   
> > +#ifdef CONFIG_FB
> > +#ifdef CONFIG_FB_NOTIFY
> > +static int xenkbd_fb_event(struct notifier_block *self,
> > +                          unsigned long action, void *data)
> > +{
> > +       struct xenkbd_info *info = container_of(self, struct xenkbd_info, nb);
> > +       struct fb_info *fb = registered_fb[0];
> > +
> > +       if (action != FB_EVENT_FB_REGISTERED || !fb)
> > +               return 0;
> > +
> > +       input_set_abs_params(info->ptr, ABS_X, 0, fb->var.xres_virtual, 0, 0);
> > +       input_set_abs_params(info->ptr, ABS_Y, 0, fb->var.yres_virtual, 0, 0);
> > +
> > +       return 0;
> > +}
> > +#endif
> > +#endif
> > +
> >   static int xenkbd_probe(struct xenbus_device *dev,
> >                                   const struct xenbus_device_id *id)
> >   {
> > -       int ret, i;
> > +       int ret, i, width, height;
> >         unsigned int abs;
> >         struct xenkbd_info *info;
> >         struct input_dev *kbd, *ptr;
> > @@ -173,9 +196,22 @@ static int xenkbd_probe(struct xenbus_device *dev,
> >         ptr->id.product = 0xfffe;
> >   
> >   	if (abs) {
> > +               width = XENFB_WIDTH;
> > +               height = XENFB_HEIGHT;
> > +#ifdef CONFIG_FB
> > +               if (registered_fb[0]) {
> > +                       width = registered_fb[0]->var.xres_virtual;
> > +                       height = registered_fb[0]->var.yres_virtual;
> > +               } else {
> > +#ifdef CONFIG_FB_NOTIFY
> > +                       info->nb.notifier_call = xenkbd_fb_event;
> > +                       fb_register_client(&info->nb);
> > +#endif
> > +               }
> > +#endif
> >                 __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, width, 0, 0);
> > +               input_set_abs_params(ptr, ABS_Y, 0, height, 0, 0);
> >         } else {
> >                 input_set_capability(ptr, EV_REL, REL_X);
> >                 input_set_capability(ptr, EV_REL, REL_Y);
> > @@ -222,6 +258,10 @@ static int xenkbd_remove(struct xenbus_device *dev)
> >         struct xenkbd_info *info = dev_get_drvdata(&dev->dev);
> >   
> >   	xenkbd_disconnect_backend(info);
> > +#ifdef CONFIG_FB_NOTIFY
> > +       if (info->nb.notifier_call)
> > +               fb_unregister_client(&info->nb);
> > +#endif
> >         if (info->kbd)
> >                 input_unregister_device(info->kbd);
> >         if (info->ptr)
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