Linux framebuffer development

Andrew Morton | 21 Sep 01:18

Re: [Bugme-new] [Bug 18912] New: BUG: unable to handle kernel NULL pointer dereference at (null)


(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

On Mon, 20 Sep 2010 22:34:17 GMT bugzilla-daemon <at> bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=18912
> 
>            Summary: BUG: unable to handle kernel NULL pointer dereference
>                     at (null)
>            Product: IO/Storage
>            Version: 2.5
>     Kernel Version: 2.6.35
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Other
>         AssignedTo: io_other <at> kernel-bugs.osdl.org
>         ReportedBy: thomas.creutz <at> gmx.de
>         Regression: No
> 
> 
> Created an attachment (id=30872)
>  --> (https://bugzilla.kernel.org/attachment.cgi?id=30872)
> full dmesg
> 
> at restart with ubuntu mainline kernel from there

(Continue reading)

Andrew Morton | 23 Mar 20:11

Re: [PATCH] fix Kconfig breakage in drivers/video

On Mon, 15 Mar 2010 08:39:20 +0200
Baruch Siach <baruch <at> tkos.co.il> wrote:

> Hi Krzysztof,
> 
> On Sun, Mar 14, 2010 at 10:53:29PM +0100, Krzysztof Helt wrote:
> > From: Krzysztof Helt <krzysztof.h1 <at> wp.pl>
> > 
> > There are two new options inside the CONFIG_FB section which do not
> > depend on the CONFIG_FB. This break Kconfig menu layout.
> > 
> > Fix it and reduce few conditions for sparc frame buffers
> > as the FB_SBUS == ((FB = y) && SPARC).
> > 
> > Signed-off-by: Krzysztof Helt <krzysztof.h1 <at> wp.pl>
> > ---
> > 
> > --- linux-orig/drivers/video/Kconfig	2010-03-14 23:54:39.000000000 +0100
> > +++ linux-git/drivers/video/Kconfig	2010-03-15 00:05:59.000000000 +0100
> > @@ -400,12 +400,9 @@ config FB_SA1100
> >  	  If you plan to use the LCD display with your SA-1100 system, say
> >  	  Y here.
> >  
> > -config HAVE_FB_IMX
> > -	bool
> > -
> >  config FB_IMX
> >  	tristate "Motorola i.MX LCD support"
> > -	depends on FB && (HAVE_FB_IMX || ARCH_MX1 || ARCH_MX2)
> > +	depends on FB && (ARCH_MX1 || ARCH_MX2)

(Continue reading)

David Miller | 14 Mar 23:19

Re: [PATCH] fix Kconfig breakage in drivers/video

From: Krzysztof Helt <krzysztof.h1 <at> poczta.fm>
Date: Sun, 14 Mar 2010 22:53:29 +0100

> From: Krzysztof Helt <krzysztof.h1 <at> wp.pl>
> 
> There are two new options inside the CONFIG_FB section which do not
> depend on the CONFIG_FB. This break Kconfig menu layout.
> 
> Fix it and reduce few conditions for sparc frame buffers
> as the FB_SBUS == ((FB = y) && SPARC).
> 
> Signed-off-by: Krzysztof Helt <krzysztof.h1 <at> wp.pl>

Acked-by: David S. Miller <davem <at> davemloft.net>

------------------------------------------------------------------------------
Download Intel&#174; Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev

Andrew Morton | 8 Dec 21:25

Re: [PATCH 2/4] da850/omap-l138: Add callback to control LCD panel power

On Tue, 08 Dec 2009 09:53:46 -0800
Kevin Hilman <khilman <at> deeprootsystems.com> wrote:

> Chaithrika U S <chaithrika <at> ti.com> writes:
> 
> > Add the platform specific callback to control LCD panel and
> > backlight power.
> >
> > Signed-off-by: Chaithrika U S <chaithrika <at> ti.com>
> > ---
> > This patch applies to DaVinci GIT tree at
> > http://git.kernel.org/?p=linux/kernel/git/khilman/linux-davinci.git;a=summary
> 
> Andrew,
> 
> I see you have pulled this series into -mm.  Thanks.  The
> drivers/video/* changes in patches 1,3 and 4 should go upstream
> through you, but I'd like to request that you drop this patch (PATCH
> 2/4) from your queue, and I will queue it in davinci-next.

I autodrop patches when they turn up in linux-next.  So if you want to
merge something then please just merge away, then I'll drop my copy.

This way patches don't get lost, and I get to check whether the patch
which was in linux-next matches the version I had, and whether the patch
which was merged into linux-next is missing any followup patches which
I had accumulated against the original.

------------------------------------------------------------------------------
Return on Information:

(Continue reading)

Henry Nestler | 2 Dec 03:59

Picon

[PATCH 4/4] fbcon: Replace vc_cursor_type mask 0x10 with CUR_USE_SW

from: Henry Nestler <henry.nestler <at> gmail.com>

Replace hard coded vc_cursor_type mask 0x10 with macro CUR_USE_SW.

Signed-off-by: Henry Nestler <henry.nestler <at> gmail.com>
---

This patch depends on [patch 3/4], because it used new macro CUR_USE_SW 0x10.

Kernel version 2.6.32-rc8

 drivers/video/console/tileblit.c        |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/video/console/tileblit.c b/drivers/video/console/tileblit.c
--- a/drivers/video/console/tileblit.c
+++ b/drivers/video/console/tileblit.c
@@ -83,7 +83,7 @@ static void tile_cursor(struct vc_data *vc, struct
fb_info *info, int mode,
 			int softback_lines, int fg, int bg)
 {
 	struct fb_tilecursor cursor;
-	int use_sw = (vc->vc_cursor_type & 0x10);
+	int use_sw = (vc->vc_cursor_type & CUR_USE_SW);

 	cursor.sx = vc->vc_x;
 	cursor.sy = vc->vc_y;
===

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

(Continue reading)

Henry Nestler | 2 Dec 03:52

Picon

[PATCH 3/4] fbcon: Bugfix soft cursor detection in Tile Blitting

from: Henry Nestler <henry.nestler <at> gmail.com>

Use mask 0x10 for "soft cursor" detection on in function tile_cursor.
(Tile Blitting Operation in framebuffer console).

The old mask 0x01 for vc_cursor_type detects CUR_NONE, CUR_LOWER_THIRD
and every second mode value as "software cursor". This hides the cursor
for these modes (cursor.mode = 0). But, only CUR_NONE or "software cursor"
should hide the cursor.

Signed-off-by: Henry Nestler <henry.nestler <at> gmail.com>
---
Kernel version 2.6.32-rc8

 drivers/video/console/tileblit.c        |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/video/console/tileblit.c b/drivers/video/console/tileblit.c
index 0056a41..15e8e1a 100644
--- a/drivers/video/console/tileblit.c
+++ b/drivers/video/console/tileblit.c
@@ -83,7 +83,7 @@ static void tile_cursor(struct vc_data *vc, struct
fb_info *info, int mode,
 			int softback_lines, int fg, int bg)
 {
 	struct fb_tilecursor cursor;
-	int use_sw = (vc->vc_cursor_type & 0x01);
+	int use_sw = (vc->vc_cursor_type & 0x10);

 	cursor.sx = vc->vc_x;

(Continue reading)

Henry Nestler | 2 Dec 03:50

Picon

[PATCH 2/4] fbcon: Macro CUR_USE_SW for vc_cursor_type mask 0x10

from: Henry Nestler <henry.nestler <at> gmail.com>

Replace hard coded 0x10 mask for vc_cursor_type with new macro CUR_USE_SW.

Signed-off-by: Henry Nestler <henry.nestler <at> gmail.com>
---
Kernel version 2.6.32-rc8

 drivers/char/vt.c                       |    2 +-
 drivers/video/console/bitblit.c         |    2 +-
 drivers/video/console/fbcon.c           |    2 +-
 drivers/video/console/fbcon_ccw.c       |    2 +-
 drivers/video/console/fbcon_cw.c        |    2 +-
 drivers/video/console/fbcon_ud.c        |    2 +-
 include/linux/console_struct.h          |    1 +
 7 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 0c80c68..f8b0f58 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -566,7 +566,7 @@ static void add_softcursor(struct vc_data *vc)
 	int i = scr_readw((u16 *) vc->vc_pos);
 	u32 type = vc->vc_cursor_type;

-	if (! (type & 0x10)) return;
+	if (! (type & CUR_USE_SW)) return;
 	if (softcursor_original != -1) return;
 	softcursor_original = i;
 	i |= ((type >> 8) & 0xff00 );

(Continue reading)

Henry Nestler | 2 Dec 03:45

Picon

[PATCH 1/4] vt: Replace mask 0x0f with macro CUR_HWMASK

from: Henry Nestler <henry.nestler <at> gmail.com>

Replace hard coded 0x0f with pre-defined macro CUR_HWMASK
to mask vc_cursor_type, and replace hard coded 1 with CUR_NONE.

Signed-off-by: Henry Nestler <henry.nestler <at> gmail.com>
---
Kernel version 2.6.32-rc8

 drivers/char/vt.c                       |    2 +-
 drivers/usb/misc/sisusbvga/sisusb_con.c |    2 +-
 drivers/video/console/mdacon.c          |    2 +-
 drivers/video/console/sticon.c          |    2 +-
 drivers/video/console/tileblit.c        |    2 +-
 drivers/video/console/vgacon.c          |    2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 0c80c68..26cf397 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -606,7 +606,7 @@ static void set_cursor(struct vc_data *vc)
 		if (vc == sel_cons)
 			clear_selection();
 		add_softcursor(vc);
-		if ((vc->vc_cursor_type & 0x0f) != 1)
+		if ((vc->vc_cursor_type & CUR_HWMASK) != CUR_NONE)
 			vc->vc_sw->con_cursor(vc, CM_DRAW);
 	} else
 		hide_cursor(vc);

(Continue reading)

Dan Carpenter | 22 Nov 15:21

Picon

[patch] fix oops with no /proc

Fixed a typo:  missing *.  This would lead to a kernel oops if the kernel
was compiled without support for the /proc file system.

Found with a static checker.  Compile tested.

regards,
dan carpenter

Signed-off-by: Dan Carpenter <error27 <at> gmail.com>

--- orig/drivers/video/via/viafbdev.c	2009-11-21 14:44:33.000000000 +0200
+++ devel/drivers/video/via/viafbdev.c	2009-11-21 14:44:43.000000000 +0200
@@ -1797,7 +1797,7 @@ static const struct file_operations viaf
 static void viafb_init_proc(struct proc_dir_entry **viafb_entry)
 {
 	*viafb_entry = proc_mkdir("viafb", NULL);
-	if (viafb_entry) {
+	if (*viafb_entry) {
 		proc_create("dvp0", 0, *viafb_entry, &viafb_dvp0_proc_fops);
 		proc_create("dvp1", 0, *viafb_entry, &viafb_dvp1_proc_fops);
 		proc_create("dfph", 0, *viafb_entry, &viafb_dfph_proc_fops);

------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
trial. Simplify your report design, integration and deployment - and focus on 
what you do best, core application coding. Discover what's new with
Crystal Reports now.  http://p.sf.net/sfu/bobj-july

Ben Dooks | 23 Nov 17:01

Picon

[PATCH 1/4] FRAMEBUFFER: Fix cfbfillrect for non-zero colours.

From: Vincent Sanders <vince <at> simtec.co.uk>

The cfbfillrect routine was incorrectly using the palette to lookup true and
direct colours, but using indexed colours directly. This was simply the
inversion of the sense of an 'if' statement. This patch fixes that so that
colours other than black work properly for cfbfillrect.

Signed-off-by: Vincent Sanders <vince <at> simtec.co.uk>
Signed-off-by: Simtec Linux Team <linux <at> simtec.co.uk>

---
 drivers/video/cfbfillrect.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: b/drivers/video/cfbfillrect.c
===================================================================
--- a/drivers/video/cfbfillrect.c	2009-05-10 14:11:19.000000000 +0100
+++ b/drivers/video/cfbfillrect.c	2009-05-10 14:16:33.000000000 +0100
@@ -289,9 +289,9 @@ void cfb_fillrect(struct fb_info *p, con

 	if (p->fix.visual == FB_VISUAL_TRUECOLOR ||
 	    p->fix.visual == FB_VISUAL_DIRECTCOLOR )
-		fg = ((u32 *) (p->pseudo_palette))[rect->color];
-	else
 		fg = rect->color;
+	else
+		fg = ((u32 *) (p->pseudo_palette))[rect->color];

 	pat = pixel_to_pat(bpp, fg);

(Continue reading)

Ben Dooks | 23 Nov 17:01

Picon

[PATCH 4/4] SM501: Implement acceleration features

From: Vincent Sanders <vince <at> simtec.co.uk>

This patch provides the acceleration entry points for the SM501
framebuffer driver.

This patch provides the sync, copyarea and fillrect entry points,
using the SM501's 2D acceleration engine to perform the operations
in-chip rather than across the bus.

Signed-off-by: Simtec Linux Team <linux <at> simtec.co.uk>
Signed-off-by: Vincent Sanders <vince <at> simtec.co.uk>

---
 drivers/video/sm501fb.c    |  237 ++++++++++++++++++++++++++++++++++++++++++---
 include/linux/sm501-regs.h |    2 
 2 files changed, 226 insertions(+), 13 deletions(-)

Index: b/drivers/video/sm501fb.c
===================================================================
--- a/drivers/video/sm501fb.c	2009-11-23 10:30:13.000000000 +0000
+++ b/drivers/video/sm501fb.c	2009-11-23 10:30:16.000000000 +0000
@@ -66,6 +66,7 @@ struct sm501fb_info {
 	struct fb_info		*fb[2];		/* fb info for both heads */
 	struct resource		*fbmem_res;	/* framebuffer resource */
 	struct resource		*regs_res;	/* registers resource */
+	struct resource		*regs2d_res;	/* 2d registers resource */
 	struct sm501_platdata_fb *pdata;	/* our platform data */

 	unsigned long		 pm_crt_ctrl;	/* pm: crt ctrl save */
@@ -73,6 +74,7 @@ struct sm501fb_info {

(Continue reading)

Group

gmane.linux.fbdev.devel.

Search Archive

Page

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11

May 2012

Language

Change language

Options

Current view: Threads only / Showing only 20 lines / Not hiding cited text.
Change to All messages, whole messages, or hide cited text.

Post a message
NNTP Newsgroup
Classic Gmane web interface
XML

XML

RSS Feed
List Information

About Gmane

Recent entries

[Bugme-new] [Bug 18912] New: BUG: unable to handle kernel NULL pointer (21 Sep 01:18)
[PATCH] fix Kconfig breakage in drivers/video (23 Mar 20:11)
[PATCH] fix Kconfig breakage in drivers/video (14 Mar 23:19)
[PATCH 2/4] da850/omap-l138: Add callback to control LCD panel power (8 Dec 21:25)
[PATCH 4/4] fbcon: Replace vc_cursor_type mask 0x10 with CUR_USE_SW (2 Dec 03:59)
[PATCH 3/4] fbcon: Bugfix soft cursor detection in Tile Blitting (2 Dec 03:52)
[PATCH 2/4] fbcon: Macro CUR_USE_SW for vc_cursor_type mask 0x10 (2 Dec 03:50)
[PATCH 1/4] vt: Replace mask 0x0f with macro CUR_HWMASK (2 Dec 03:45)
[patch] fix oops with no /proc (22 Nov 15:21)
[PATCH 1/4] FRAMEBUFFER: Fix cfbfillrect for non-zero colours. (23 Nov 17:01)
[PATCH 4/4] SM501: Implement acceleration features (23 Nov 17:01)
[PATCH 2/4] SM501: Fix missing uses of resource_size() (23 Nov 17:01)
[PATCH 3/4] SM501: Fix use of old instead of (23 Nov 17:01)
drm_fb_helper: Impossible to change video mode (20 Nov 14:16)
i810fb: fix wrong pixclock for discrete mode selection (19 Nov 18:58)
[PATCH 4/8] pxa: delete redundant vsync/hsync revert flag (16 Nov 10:34)
[PATCH 3/8] pxa: fix offset setting at initialization (16 Nov 10:34)
[PATCH 2/8] pxa: support PXA168 LCD platform dependent power on (16 Nov 10:34)
framebuffer general questions (13 Nov 15:11)
[PATCH] mx3fb: adds LCD backlight driver (9 Nov 12:13)
[PATCH] mx3fb: Fix display brightness initialization (9 Nov 12:10)

Archives

3	March 2012
1	September 2010
1	April 2010
7	March 2010
1	January 2010
5	December 2009
61	November 2009
31	October 2009
85	September 2009
129	August 2009
132	July 2009
193	June 2009
247	May 2009
129	April 2009
107	March 2009
140	February 2009
157	January 2009
226	December 2008
188	November 2008
125	October 2008
119	September 2008
244	August 2008
157	July 2008
211	June 2008
240	May 2008
145	April 2008
155	March 2008
138	February 2008
104	January 2008
27	December 2007
78	November 2007
130	October 2007
122	September 2007
154	August 2007
187	July 2007
156	June 2007
229	May 2007
173	April 2007
121	March 2007
309	February 2007
131	January 2007
83	December 2006
218	November 2006
69	October 2006
67	September 2006
81	August 2006
85	July 2006
232	June 2006
102	May 2006
109	April 2006
129	March 2006
58	February 2006
87	January 2006
143	December 2005
152	November 2005
112	October 2005
86	September 2005
237	August 2005
159	July 2005
77	June 2005
77	May 2005
108	April 2005
592	March 2005
270	February 2005
126	January 2005
88	December 2004
310	November 2004
226	October 2004
193	September 2004
128	August 2004
122	July 2004
223	June 2004
239	May 2004
254	April 2004
169	March 2004
183	February 2004
165	January 2004
65	December 2003
58	November 2003
204	October 2003
263	September 2003
181	August 2003
81	July 2003
84	June 2003
112	May 2003
140	April 2003
384	March 2003
134	February 2003
295	January 2003
214	December 2002
109	November 2002
139	October 2002
31	September 2002
133	August 2002
96	July 2002
57	June 2002
62	May 2002
1	January 2002

Design

Zawodny | Right Menu | Left Menu

Your Own Design

Paste the URL of your CSS below. Download CSS template