closing out / clean up.
** Changed in: linux-linaro
Status: Fix Committed => Fix Released
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
On Tue, 24 May 2011, Andy Doan wrote:
> The fix DaMiEn667 mentioned in comment #28 never seems to have been
> mainlined.
>
> I just did a quick test with the latest omap tree:
> commit: c7769fdf6a9c87c6c3ddca0103566eabc5e4db01
>
> The underflwo now longer occurs, so I think the problem has alr
The fix DaMiEn667 mentioned in comment #28 never seems to have been
mainlined.
I just did a quick test with the latest omap tree:
commit: c7769fdf6a9c87c6c3ddca0103566eabc5e4db01
The underflwo now longer occurs, so I think the problem has already
been fixed upstream.
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http://e2e.ti.com/cfs-filesystemfile.ashx/__key/CommunityServer-
Discussions-Components-
Files/447/7220.0001_2D00_OMAP3EVM_2D00_Set_2D00_minimum_2D00_throughput_2D00_requirement_2D00_for_2D00_DSS.txt
TI guys fixed it on the EVM long ago... I applied their patch to the
relative files for beagleboar
** Branch linked: lp:ubuntu/linux-linaro-vexpress
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
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** Branch linked: lp:ubuntu/linux-linaro-s5pv310
** Branch linked: lp:ubuntu/linux-linaro-u8500
** Branch linked: lp:ubuntu/linux-linaro-mx51
** Branch linked: lp:ubuntu/linux-linaro-omap
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This bug was fixed in the package linux-linaro-omap - 2.6.38-1002.3
---
linux-linaro-omap (2.6.38-1002.3) natty; urgency=low
[ Upstream Fixes ]
* MUSB: shutdown: Make sure block is awake before doing shutdown
- LP: #745737
* Fixed gpio polarity of gpio USB-phy reset.
-
** Changed in: linux-linaro
Status: New => Fix Committed
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
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** Changed in: linux-linaro-omap (Ubuntu)
Status: Confirmed => Fix Committed
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
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** Changed in: linux-linaro
Importance: Undecided => High
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
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Will do.
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
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On 04/13/2011 10:21 AM, John Rigby wrote:
> More info, commenting out the lowest two operating points for 34xx makes
> the problem go away:
>
> diff --git a/arch/arm/mach-omap2/opp3xxx_data.c
> b/arch/arm/mach-omap2/opp3xxx_data.c
> index e71c5ba..06b6297 100644
> --- a/arch/arm/mach-omap2/opp3xx
So for the packaged kernel we have an ugly but working work-around. The
upstream issue remains.
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
More info, commenting out the lowest two operating points for 34xx makes
the problem go away:
diff --git a/arch/arm/mach-omap2/opp3xxx_data.c
b/arch/arm/mach-omap2/opp3xxx_data.c
index e71c5ba..06b6297 100644
--- a/arch/arm/mach-omap2/opp3xxx_data.c
+++ b/arch/arm/mach-omap2/opp3xxx_data.c
@@ -10
Confirming Andy's report. This is still broken in
git://git.linaro.org/kernel/linux-linaro-2.6.38.git. Again to recap the
problem occurs when the governor is switched to ondemand.
** Also affects: linux-linaro
Importance: Undecided
Status: New
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Tom in right, we never saw this on XM. In addition newer upstream does
not work at all for my on any omap3. Not sure if it is my tree, my
config or upstream. Chasing this now.
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Saw the same error on IGEP with 2011-04-08 build. See
https://bugs.launchpad.net/linaro-graphics-wg/+bug/729374
which maybe a duplicate of this bug.
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On 04/12/2011 09:38 AM, vishwanath sripathy wrote:
> I saw a comment saying issue is no longer seen in 2.6.38 Linaro kernel. So
> does it mean this issue is no longer valid?
It looks like it must have either been temporarily fixed and is now
broken, or my testing was incorrect last time.
I'm on
Wait. This issue never showed up on the Xm. We should test this on a
Beagle Cx if it hasn't been.
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
Right, Andy did say it's fixed for him in the current linaro tree - I
think I misread that, sorry.
John has also confirmed that it works for him on the Beagle XM and is
now testing on the Beagle C4. If that checks out, we should see kernel
packages including the fix soon.
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Thanks for the work around suggestion.
Until the update of the kernel in the linaro hwpack for omap3, this
issue will affect those running on beagle C hardware.
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I saw a comment saying issue is no longer seen in 2.6.38 Linaro kernel. So does
it mean this issue is no longer valid?
If someone is blocked because of this, I would suggest to use performance
governor instead of ondemand to avoid cpufreq impact.
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Assigning to the PM WG. Amit, Vishwa, any progress on fixing this? Is
there some power management patch we could back out as a workaround?
** Changed in: linux-linaro-omap (Ubuntu)
Importance: Undecided => High
** Changed in: linux-linaro-omap (Ubuntu)
Assignee: (unassigned) => Linaro P
I just moved to the latest code from:
git://git.linaro.org/kernel/linux-linaro-2.6.38.git
and the problem seems to have gone away for me.
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Title:
Vishwa added the DVFS code to for OMAP3. He must've seen this problem.
Adding him.
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
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In response to Jamie's question (Amitk will know better). Display
driver hw sucks from ram and blows to an lcd or other graphics . It has
to keep up a certain speed to keep the output side happy. To deal with
occasional starving on the input side there is usually a fifo. A deeper
fifo can help s
Subscribing Amitk who may have more insight here.
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
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John, can you see anything in the power management code that could
starve the video buffer and never allow it to come back to life?
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Title:
omapds
After conversation via email (thanks andy green) that this might have
something to do with power management. Turns out that ondemand scaling
is turned on about 60 seconds after boot. From etc/init.d/ondemand:
#! /bin/sh
### BEGIN INIT INFO
# Provides: ondemand
# Required-Start:$rem
This needs to be assigned to someone else. The similar bugs found doing
a web search were all about having more than one plane enabled and doing
rotations. In those cases it makes sense that the memory bandwidth was
being exhausted. That should not be the case here where all we have is
a console
** Changed in: linux-linaro-omap (Ubuntu)
Assignee: (unassigned) => John Rigby (jcrigby)
** Changed in: linux-linaro-omap (Ubuntu)
Status: New => Confirmed
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This fails even with the boot parameters called out in #4 above?
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
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Current 0317 omap3 hwpack no matter what user space image (nano, alip
etc) fails across the board.
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Title:
omapdss DISPC error: GFX_FIFO_UNDERFLOW
Does the following help?
Try allocating some more VRAM for fb0 and fb1 and change 'rootdelay=1' to
'rootwait' and remove 'nohz=off'
(From http://www.mail-archive.com/linux-
o...@vger.kernel.org/msg19936.html.)
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A further cold restart. same error message after 96 seconds.
[ 96.624816] omapdss DISPC error: GFX_FIFO_UNDERFLOW, disabling GFX
Here's the full dmesg:
root@linaro:~# dmesg
[0.00] Initializing cgroup subsys cpuset
[0.00] Initializing cgroup subsys cpu
[0.00] Linux ver
After a warm restart I see the following :
[5.712554] registered taskstats version 1
[5.717163] fbcvt: 1280x720@60: CVT Name - .921M9-R
[5.722747] usb 1-2.1.2: new low speed USB device using ehci-omap and
address 6
[5.747558] Console: switching to colour frame buffer device 160x45
This just showed up when running the ALIP image dated 03102011 on a
beagle C4 using the omap3-x11 hwpack dated 03102011.
The moment the mapdss DISPC error: GFX_FIFO_UNDERFLOW, disabling GFX
unsuprisingly the graphical session disappeared from ALIP.
Here's a dmesg dump
[ 15.639648] usbcore: re
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