* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
2010-12-08 16:18 [Bug 24462] New: r600: spread spectrum: flickering screen (bisected) bugzilla-daemon
@ 2010-12-08 17:11 ` bugzilla-daemon
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From: bugzilla-daemon @ 2010-12-08 17:11 UTC (permalink / raw)
To: dri-devel
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--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> 2010-12-08 17:11:56 ---
Created an attachment (id=39252)
--> (https://bugzilla.kernel.org/attachment.cgi?id=39252)
possible fix
Does this patch help?
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
2010-12-08 16:18 [Bug 24462] New: r600: spread spectrum: flickering screen (bisected) bugzilla-daemon
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From: bugzilla-daemon @ 2010-12-08 20:27 UTC (permalink / raw)
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--- Comment #2 from Luca Tettamanti <kronos.it@gmail.com> 2010-12-08 20:27:11 ---
(In reply to comment #1)
> Created an attachment (id=39252)
--> (https://bugzilla.kernel.org/attachment.cgi?id=39252) [details]
> possible fix
>
> Does this patch help?
No, flickering it's still there. The parameters passed to
EnableSpreadSpectrumOnPPLL with 2.6.36 and 2.6.37-rc5 are:
ss->percentage = 0x1e
ss->type = 0x1
ss->step = 0x1
ss->delay = 0x2a
ss->range = 0x2
pll_id = 0x0
but 2.6.36 uses ENABLE_SPREAD_SPECTRUM_ON_PPLL_PS_ALLOCATION, while the newer
kernel uses ENABLE_LVDS_SS_PARAMETERS_V2 for the parameters (the only
difference is that the latter does not have ucPpll); is this correct?
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-08 20:39 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=24462
Alex Deucher <alexdeucher@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alexdeucher@gmail.com
--- Comment #3 from Alex Deucher <alexdeucher@gmail.com> 2010-12-08 20:39:57 ---
Please attach a copy of your vbios:
(as root)
(use lspci to get the bus id)
cd /sys/bus/pci/devices/<pci bus id>
echo 1 > rom
cat rom > /tmp/vbios.rom
echo 0 > rom
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-08 20:47 UTC (permalink / raw)
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--- Comment #4 from Luca Tettamanti <kronos.it@gmail.com> 2010-12-08 20:47:55 ---
Created an attachment (id=39342)
--> (https://bugzilla.kernel.org/attachment.cgi?id=39342)
M76 vbios
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
2010-12-08 16:18 [Bug 24462] New: r600: spread spectrum: flickering screen (bisected) bugzilla-daemon
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From: bugzilla-daemon @ 2010-12-08 21:14 UTC (permalink / raw)
To: dri-devel
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--- Comment #5 from Alex Deucher <alexdeucher@gmail.com> 2010-12-08 21:14:47 ---
Created an attachment (id=39362)
--> (https://bugzilla.kernel.org/attachment.cgi?id=39362)
possible fix
(In reply to comment #2)
> but 2.6.36 uses ENABLE_SPREAD_SPECTRUM_ON_PPLL_PS_ALLOCATION, while the newer
> kernel uses ENABLE_LVDS_SS_PARAMETERS_V2 for the parameters (the only
> difference is that the latter does not have ucPpll); is this correct?
That is correct. I suspect it's the pll that's problematic:
if (ss_enabled) {
if (ss->refdiv) {
pll->flags |= RADEON_PLL_USE_REF_DIV;
pll->reference_div = ss->refdiv;
}
}
It uses a fixed reference divider of 2 in your case. Does the attached patch
help? Please also try this patch in conjunction with the patch in comment 1.
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-08 22:12 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=24462
Rafael J. Wysocki <rjw@sisk.pl> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |florian@mickler.org,
| |maciej.rutecki@gmail.com,
| |rjw@sisk.pl
Blocks| |21782
--- Comment #6 from Rafael J. Wysocki <rjw@sisk.pl> 2010-12-08 22:12:17 ---
First-Bad-Commit : ba032a58d1f320039e7850fb6e8651695c1aa571
Handled-By : Alex Deucher <alexdeucher@gmail.com>
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-08 22:32 UTC (permalink / raw)
To: dri-devel
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--- Comment #7 from Luca Tettamanti <kronos.it@gmail.com> 2010-12-08 22:32:06 ---
(In reply to comment #5)
> Does the attached patch
> help? Please also try this patch in conjunction with the patch in comment 1.
Still not working, even with the first patch applied.
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-08 23:05 UTC (permalink / raw)
To: dri-devel
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Alex Deucher <alexdeucher@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #39252|0 |1
is obsolete| |
Attachment #39362|0 |1
is obsolete| |
--- Comment #8 from Alex Deucher <alexdeucher@gmail.com> 2010-12-08 23:05:27 ---
Created an attachment (id=39372)
--> (https://bugzilla.kernel.org/attachment.cgi?id=39372)
possible fix
This patch disables use of the ss fixed ref divide and should fix it.
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-09 20:12 UTC (permalink / raw)
To: dri-devel
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--- Comment #9 from Luca Tettamanti <kronos.it@gmail.com> 2010-12-09 20:12:05 ---
(In reply to comment #8)
> This patch disables use of the ss fixed ref divide and should fix it.
Yes, taking out that code worked. I'm of course available for further testing
if you're not satisfied with this workaround ;)
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-17 0:43 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=24462
Florian Mickler <florian@mickler.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |PATCH_ALREADY_AVAILABLE
--- Comment #10 from Florian Mickler <florian@mickler.org> 2010-12-17 00:43:13 ---
Patch: https://bugzilla.kernel.org/attachment.cgi?id=39372
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-20 6:57 UTC (permalink / raw)
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--- Comment #11 from Alex Deucher <alexdeucher@gmail.com> 2010-12-20 06:57:15 ---
I've sent the patch to Dave. It should show up in his next drm pull request.
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2010-12-29 22:48 UTC (permalink / raw)
To: dri-devel
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Rafael J. Wysocki <rjw@sisk.pl> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
Resolution|PATCH_ALREADY_AVAILABLE |CODE_FIX
--- Comment #12 from Rafael J. Wysocki <rjw@sisk.pl> 2010-12-29 22:48:03 ---
Fixed by commit e5fd205 drm/radeon/kms: disable ss fixed ref divide .
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2011-02-11 6:57 UTC (permalink / raw)
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--- Comment #13 from Alex Deucher <alexdeucher@gmail.com> 2011-02-11 06:57:54 ---
Luca, can you try re-enabling this code with 2.6.38-rc4 or newer? Do you still
have problems?
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From: bugzilla-daemon @ 2011-02-11 7:32 UTC (permalink / raw)
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--- Comment #14 from Alex Deucher <alexdeucher@gmail.com> 2011-02-11 07:32:50 ---
Created an attachment (id=47282)
--> (https://bugzilla.kernel.org/attachment.cgi?id=47282)
better fix
Can you try the following patch against 2.6.38-rc4 or newer and make sure all
is working well?
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From: bugzilla-daemon @ 2011-02-11 16:09 UTC (permalink / raw)
To: dri-devel
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--- Comment #15 from Luca Tettamanti <kronos.it@gmail.com> 2011-02-11 16:09:40 ---
(In reply to comment #14)
> Created an attachment (id=47282)
--> (https://bugzilla.kernel.org/attachment.cgi?id=47282) [details]
> better fix
>
> Can you try the following patch against 2.6.38-rc4 or newer and make sure all
> is working well?
2.6.38-rc4 plus the patch looks good, thanks!
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2011-02-12 1:17 UTC (permalink / raw)
To: dri-devel
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--- Comment #16 from Alex Deucher <alexdeucher@gmail.com> 2011-02-12 01:17:21 ---
Created an attachment (id=47482)
--> (https://bugzilla.kernel.org/attachment.cgi?id=47482)
new patch
Can you try this patch? Try uncommenting the following lines to see if either
of those flags work as well. Try them individually and together if possible
and report back which, if any, helps.
/*pll->flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP;*/
/*if (ASIC_IS_AVIVO(rdev))
pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV;*/
Thanks!
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* [Bug 24462] r600: spread spectrum: flickering screen (bisected)
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From: bugzilla-daemon @ 2011-02-14 13:56 UTC (permalink / raw)
To: dri-devel
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--- Comment #17 from Luca Tettamanti <kronos.it@gmail.com> 2011-02-14 13:56:01 ---
(In reply to comment #16)
> Created an attachment (id=47482)
--> (https://bugzilla.kernel.org/attachment.cgi?id=47482) [details]
> new patch
>
> Can you try this patch? Try uncommenting the following lines to see if either
> of those flags work as well. Try them individually and together if possible
> and report back which, if any, helps.
>
> /*pll->flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP;*/
>
> /*if (ASIC_IS_AVIVO(rdev))
> pll->flags |= RADEON_PLL_USE_FRAC_FB_DIV;*/
The first one alone works, the second one alone does *not* work, both together
work fine.
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The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
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