lkml.org 
[lkml]   [2017]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3] xen,input: try to read screen resolution for xen-kbdfront
Date
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@suse.com>
---
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)
--
2.10.2
\
 
 \ /
  Last update: 2017-01-30 16:12    [W:0.122 / U:0.188 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site