Get the line length from sysfs.

4 messages, 4 authors, 2005-09-22 · open the first message on its own page

Get the line length from sysfs.

From: James Simmons <hidden>
Date: 2005-09-21 21:03:37

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)


-------------------------------------------------------

SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42" plasma tv or your very own
Sony(tm)PSP.  Click here to play: http://sourceforge.net/geronimo.php

Re: Get the line length from sysfs.

From: Kronos <hidden>
Date: 2005-09-21 23:27:55

Il Wed, Sep 21, 2005 at 10:03:29PM +0100, James Simmons ha scritto:

quoted hunk

--- 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 :)

quoted hunk

+	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.


-------------------------------------------------------
SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42" plasma tv or your very own
Sony(tm)PSP.  Click here to play: http://sourceforge.net/geronimo.php

Re: Get the line length from sysfs.

From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: 2005-09-22 09:38:57

On Wed, 21 Sep 2005, James Simmons wrote:

quoted hunk

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


-------------------------------------------------------
SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42" plasma tv or your very own
Sony(tm)PSP.  Click here to play: http://sourceforge.net/geronimo.php

Re: Get the line length from sysfs.

From: Antonino Daplas <adaplas@gmail.com>
Date: 2005-09-22 10:19:49

On 9/22/05, Geert Uytterhoeven [off-list ref] wrote:

On Wed, 21 Sep 2005, James Simmons wrote:

quoted

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


-------------------------------------------------------
SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42" plasma tv or your very own
Sony(tm)PSP.  Click here to play: http://sourceforge.net/geronimo.php

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help