Get the line length from sysfs.

Get the line length from sysfs.

[James Simmons]

Let me know if this is acceptable. Some people might not like the name.


--- linus-2.6/drivers/video/fbsysfs.c	2005-07-31 15:45:22.000000000 -0700
+++ fbdev-2.6/drivers/video/fbsysfs.c	2005-09-21 13:54:02.000000000 -0700
@@ -242,6 +242,13 @@
 			fb_info->var.yres_virtual);
 }
 
+static ssize_t show_stride(struct class_device *class_device, char *buf)
+{
+	struct fb_info *fb_info =
+		(struct fb_info *)class_get_devdata(class_device);
+	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
+}
+
 /* Format for cmap is "%02x%c%4x%4x%4x\n" */
 /* %02x entry %c transp %4x red %4x blue %4x green \n */
 /* 256 rows at 16 chars equals 4096, the normal page size */
@@ -432,6 +439,7 @@
 	__ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan),
 	__ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
 	__ATTR(name, S_IRUGO, show_name, NULL),
+	__ATTR(stride, S_IRUGO, show_stride, NULL),
 };
 
 int fb_init_class_device(struct fb_info *fb_info)


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Re: Get the line length from sysfs.

[Kronos]

Il Wed, Sep 21, 2005 at 10:03:29PM +0100, James Simmons ha scritto: 
> --- linus-2.6/drivers/video/fbsysfs.c	2005-07-31 15:45:22.000000000 -0700
> +++ fbdev-2.6/drivers/video/fbsysfs.c	2005-09-21 13:54:02.000000000 -0700
> @@ -242,6 +242,13 @@
>  			fb_info->var.yres_virtual);
>  }
>  
> +static ssize_t show_stride(struct class_device *class_device, char *buf)
> +{
> +	struct fb_info *fb_info =
> +		(struct fb_info *)class_get_devdata(class_device);

class_get_devdata returns a void*, you can remove the cast and use just
one line :)

> +	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
> +}
> +
>  /* Format for cmap is "%02x%c%4x%4x%4x\n" */
>  /* %02x entry %c transp %4x red %4x blue %4x green \n */
>  /* 256 rows at 16 chars equals 4096, the normal page size */
> @@ -432,6 +439,7 @@
>  	__ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan),
>  	__ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
>  	__ATTR(name, S_IRUGO, show_name, NULL),
> +	__ATTR(stride, S_IRUGO, show_stride, NULL),
>  };
>  
>  int fb_init_class_device(struct fb_info *fb_info)


Luca
-- 
Home: http://kronoz.cjb.net
Se non puoi convincerli, confondili.


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Re: Get the line length from sysfs.

[Geert Uytterhoeven]

On Wed, 21 Sep 2005, James Simmons wrote:
> Let me know if this is acceptable. Some people might not like the name.
> 
> 
> --- linus-2.6/drivers/video/fbsysfs.c	2005-07-31 15:45:22.000000000 -0700
> +++ fbdev-2.6/drivers/video/fbsysfs.c	2005-09-21 13:54:02.000000000 -0700
> @@ -242,6 +242,13 @@
>  			fb_info->var.yres_virtual);
>  }
>  
> +static ssize_t show_stride(struct class_device *class_device, char *buf)
> +{
> +	struct fb_info *fb_info =
> +		(struct fb_info *)class_get_devdata(class_device);
> +	return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);

Do all drivers set fix.line_length these days?

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds


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Re: Get the line length from sysfs.

[Antonino Daplas]

On 9/22/05, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> On Wed, 21 Sep 2005, James Simmons wrote:
> > Let me know if this is acceptable. Some people might not like the name.
> >
> >
> > --- linus-2.6/drivers/video/fbsysfs.c 2005-07-31 15:45:22.000000000 -0700
> > +++ fbdev-2.6/drivers/video/fbsysfs.c 2005-09-21 13:54:02.000000000 -0700
> > @@ -242,6 +242,13 @@
> >                       fb_info->var.yres_virtual);
> >  }
> >
> > +static ssize_t show_stride(struct class_device *class_device, char *buf)
> > +{
> > +     struct fb_info *fb_info =
> > +             (struct fb_info *)class_get_devdata(class_device);
> > +     return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
>
> Do all drivers set fix.line_length these days?
>

They have to, if they want to use any of the cfb_* drawing functions.

Tony


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