Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
Hi Takashi
Thanks a lot.
---
Hi Sridhara
Can you please try the test kernel ?
Regards
Jeffrey
>>> Takashi Iwai 2017/1/31 下午 13:49 >>>On Tue, 31 Jan 2017
>>> 03:34:23 +0100,
Jeffrey Cheung wrote:
>
> Hi Takashi
>
> How is the test kernel ? Just wonder when Sridhara team can test again.
I already informed it in bugzilla and waiting for the test result...
http://bugzilla.suse.com/show_bug.cgi?id=1019061#c35
It's found in
http://download.opensuse.org/repositories/home:/tiwai:/bnc1019061-3/standard/
Takashi
>
> Regards
>
> Jeffrey
>
> >>> Takashi Iwai 2017/1/27 下午 18:29 >>>On Thu, 26 Jan 2017
> >>> 15:19:44 +0100,
> Takashi Iwai wrote:
> >
> > On Thu, 26 Jan 2017 14:58:55 +0100,
> > Ville Syrjälä wrote:
> > >
> > > Hmm. Have you tried 9f2bdb006a7e ("drm/i915: Prevent PPS stealing
> > > from a normal DP port on VLV/CHV") ?
> >
> > No, it's not tested. I'll prepare a test kernel with it.
>
> Sridhara reported that my backport didn't help, unfortunately.
>
> But it was a backport, so I might have missed something.
> To be sure, I'll try to build a kernel from drm-intel-nightly, and let
> them test again.
>
>
> thanks,
>
> Takashi
>
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Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
Hi Takashi
How is the test kernel ? Just wonder when Sridhara team can test again.
Regards
Jeffrey
>>> Takashi Iwai 2017/1/27 下午 18:29 >>>On Thu, 26 Jan 2017
>>> 15:19:44 +0100,
Takashi Iwai wrote:
>
> On Thu, 26 Jan 2017 14:58:55 +0100,
> Ville Syrjälä wrote:
> >
> > Hmm. Have you tried 9f2bdb006a7e ("drm/i915: Prevent PPS stealing
> > from a normal DP port on VLV/CHV") ?
>
> No, it's not tested. I'll prepare a test kernel with it.
Sridhara reported that my backport didn't help, unfortunately.
But it was a backport, so I might have missed something.
To be sure, I'll try to build a kernel from drm-intel-nightly, and let
them test again.
thanks,
Takashi
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Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
Hi,
Installed RPM,
Issue still present with Single Dell E- Series monitor (Display doesn't appear )
Issue not observed with Dual Dell E-Series monitor.
Sleep issue not observed.
Thanks
Sridhar
-Original Message-
From: Jeffrey Cheung [mailto:jche...@suse.com]
Sent: Tuesday, January 31, 2017 11:39 AM
To: ti...@suse.de
Cc: Venkatanara, Sridhara ;
angus.c...@intel.com; ray@intel.com; ville.syrj...@linux.intel.com;
intel-gfx@lists.freedesktop.org; mma...@suse.cz
Subject: Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
Hi Takashi
Thanks a lot.
---
Hi Sridhara
Can you please try the test kernel ?
Regards
Jeffrey
>>> Takashi Iwai 2017/1/31 下午 13:49 >>>On Tue, 31 Jan
>>> 2017 03:34:23 +0100,
Jeffrey Cheung wrote:
>
> Hi Takashi
>
> How is the test kernel ? Just wonder when Sridhara team can test again.
I already informed it in bugzilla and waiting for the test result...
http://bugzilla.suse.com/show_bug.cgi?id=1019061#c35
It's found in
http://download.opensuse.org/repositories/home:/tiwai:/bnc1019061-3/standard/
Takashi
>
> Regards
>
> Jeffrey
>
> >>> Takashi Iwai 2017/1/27 下午 18:29 >>>On Thu, 26 Jan
> >>> 2017 15:19:44 +0100,
> Takashi Iwai wrote:
> >
> > On Thu, 26 Jan 2017 14:58:55 +0100,
> > Ville Syrjälä wrote:
> > >
> > > Hmm. Have you tried 9f2bdb006a7e ("drm/i915: Prevent PPS stealing
> > > from a normal DP port on VLV/CHV") ?
> >
> > No, it's not tested. I'll prepare a test kernel with it.
>
> Sridhara reported that my backport didn't help, unfortunately.
>
> But it was a backport, so I might have missed something.
> To be sure, I'll try to build a kernel from drm-intel-nightly, and let
> them test again.
>
>
> thanks,
>
> Takashi
>
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Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
On Tue, 31 Jan 2017 03:34:23 +0100,
Jeffrey Cheung wrote:
>
> Hi Takashi
>
> How is the test kernel ? Just wonder when Sridhara team can test again.
I already informed it in bugzilla and waiting for the test result...
http://bugzilla.suse.com/show_bug.cgi?id=1019061#c35
It's found in
http://download.opensuse.org/repositories/home:/tiwai:/bnc1019061-3/standard/
Takashi
>
> Regards
>
> Jeffrey
>
> >>> Takashi Iwai 2017/1/27 下午 18:29 >>>On Thu, 26 Jan 2017
> >>> 15:19:44 +0100,
> Takashi Iwai wrote:
> >
> > On Thu, 26 Jan 2017 14:58:55 +0100,
> > Ville Syrjälä wrote:
> > >
> > > Hmm. Have you tried 9f2bdb006a7e ("drm/i915: Prevent PPS stealing
> > > from a normal DP port on VLV/CHV") ?
> >
> > No, it's not tested. I'll prepare a test kernel with it.
>
> Sridhara reported that my backport didn't help, unfortunately.
>
> But it was a backport, so I might have missed something.
> To be sure, I'll try to build a kernel from drm-intel-nightly, and let
> them test again.
>
>
> thanks,
>
> Takashi
>
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Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
Please find My replay.
Thanks
Sridhar
-Original Message-
From: Takashi Iwai [mailto:ti...@suse.de]
Sent: Thursday, January 26, 2017 7:50 PM
To: Ville Syrjälä
Cc: intel-gfx ; Michal Marek ;
Chen, Angus ; Jeffrey Cheung ; Hsu, Ray
; Venkatanara, Sridhara
Subject: Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
On Thu, 26 Jan 2017 14:58:55 +0100,
Ville Syrjälä wrote:
>
> On Wed, Jan 25, 2017 at 01:56:35PM +0100, Takashi Iwai wrote:
> > Hi,
> >
> > we've got a bug report about the blank monitor on Cherry Trail
> > machines. And, Intel team (Cc'ed) spotted out that this seems
> > triggered by DPMS transition. A patch like below actually fixes the
> > problem.
> >
> > Of course it doesn't look like a right "fix". Do you guys have any
> > hint for further debugging?
>
> Is it some kind of new fangled MST capable monitor? I've noticed that
> those tend to be super easy to mess up.
The monitors are in Dell team. Sridhara, could you give details about the
problematic monitors?
[Sridhar] Monitor types E2316H, E2216H
http://www.dell.com/ed/business/p/dell-e2316h-monitor/pd
> > Some more (not alt-) facts:
> >
> > - The machine we've tested is a Cherry Trail based box with two
> > DisplayPorts. Intel team mentioned that there are other machines
> > suffering from the same problem.
>
> Is it really somehow tied to the machine? I would imagine it should
> behave exactly the same way no matter what machine you have.
A good question. Again the question is delegated to Sridhara :)
[Sridhar] It is tied to the Cherry Trail based box. Not observed with Bay Trail
machines.
> > - With some monitors, the screen remains blank during boot and on X.
> > This can be cured after "xset dpms force off" and resume, or
> > reconfiguring via xrandr.
> >
> > - The issue seems specific to DP connections. When two (identical)
> > monitors are connected, only one monitor goes blank.
>
> Hmm. Have you tried 9f2bdb006a7e ("drm/i915: Prevent PPS stealing from
> a normal DP port on VLV/CHV") ?
No, it's not tested. I'll prepare a test kernel with it.
Thanks!
Takashi
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Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
On Thu, 26 Jan 2017 15:19:44 +0100,
Takashi Iwai wrote:
>
> On Thu, 26 Jan 2017 14:58:55 +0100,
> Ville Syrjälä wrote:
> >
> > Hmm. Have you tried 9f2bdb006a7e ("drm/i915: Prevent PPS stealing
> > from a normal DP port on VLV/CHV") ?
>
> No, it's not tested. I'll prepare a test kernel with it.
Sridhara reported that my backport didn't help, unfortunately.
But it was a backport, so I might have missed something.
To be sure, I'll try to build a kernel from drm-intel-nightly, and let
them test again.
thanks,
Takashi
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Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
On Thu, 26 Jan 2017 14:58:55 +0100,
Ville Syrjälä wrote:
>
> On Wed, Jan 25, 2017 at 01:56:35PM +0100, Takashi Iwai wrote:
> > Hi,
> >
> > we've got a bug report about the blank monitor on Cherry Trail
> > machines. And, Intel team (Cc'ed) spotted out that this seems
> > triggered by DPMS transition. A patch like below actually fixes the
> > problem.
> >
> > Of course it doesn't look like a right "fix". Do you guys have any
> > hint for further debugging?
>
> Is it some kind of new fangled MST capable monitor? I've noticed that
> those tend to be super easy to mess up.
The monitors are in Dell team. Sridhara, could you give details about
the problematic monitors?
> > Some more (not alt-) facts:
> >
> > - The machine we've tested is a Cherry Trail based box with two
> > DisplayPorts. Intel team mentioned that there are other machines
> > suffering from the same problem.
>
> Is it really somehow tied to the machine? I would imagine it should
> behave exactly the same way no matter what machine you have.
A good question. Again the question is delegated to Sridhara :)
> > - With some monitors, the screen remains blank during boot and on X.
> > This can be cured after "xset dpms force off" and resume, or
> > reconfiguring via xrandr.
> >
> > - The issue seems specific to DP connections. When two (identical)
> > monitors are connected, only one monitor goes blank.
>
> Hmm. Have you tried 9f2bdb006a7e ("drm/i915: Prevent PPS stealing
> from a normal DP port on VLV/CHV") ?
No, it's not tested. I'll prepare a test kernel with it.
Thanks!
Takashi
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Re: [Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
On Wed, Jan 25, 2017 at 01:56:35PM +0100, Takashi Iwai wrote:
> Hi,
>
> we've got a bug report about the blank monitor on Cherry Trail
> machines. And, Intel team (Cc'ed) spotted out that this seems
> triggered by DPMS transition. A patch like below actually fixes the
> problem.
>
> Of course it doesn't look like a right "fix". Do you guys have any
> hint for further debugging?
Is it some kind of new fangled MST capable monitor? I've noticed that
those tend to be super easy to mess up.
>
> Some more (not alt-) facts:
>
> - The machine we've tested is a Cherry Trail based box with two
> DisplayPorts. Intel team mentioned that there are other machines
> suffering from the same problem.
Is it really somehow tied to the machine? I would imagine it should
behave exactly the same way no matter what machine you have.
>
> - With some monitors, the screen remains blank during boot and on X.
> This can be cured after "xset dpms force off" and resume, or
> reconfiguring via xrandr.
>
> - The issue seems specific to DP connections. When two (identical)
> monitors are connected, only one monitor goes blank.
Hmm. Have you tried 9f2bdb006a7e ("drm/i915: Prevent PPS stealing
from a normal DP port on VLV/CHV") ?
>
> - The issue happens only with some monitor models (Dell E-series).
> Other Dell monitors (e.g. U-series) or other vendors seem working as
> far as we've tested.
>
> - Intel team mentioned that a similar issue was seen on a Baytrail
> machine.
>
> - The register value seems passed correctly. The read back after the
> register write showed the expected value.
> Also, spinning more times in DPMS_ON loop didn't help, too.
>
> - The issue is reproduced with the recent kernels (at least 4.9.x)
>
>
> Any comments / suggestions appreciated.
>
> thanks,
>
> Takashi
>
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -2205,8 +2205,12 @@ void intel_dp_sink_dpms(struct intel_dp
> return;
>
> if (mode != DRM_MODE_DPMS_ON) {
> +#if 0
> ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
>DP_SET_POWER_D3);
> +#else
> + ret = 1;
> +#endif
> } else {
> /*
>* When turning on, we need to retry for 1ms to give the sink
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--
Ville Syrjälä
Intel OTC
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[Intel-gfx] Broken DPMS with DisplayPort on CHV (also BYT?)
Hi,
we've got a bug report about the blank monitor on Cherry Trail
machines. And, Intel team (Cc'ed) spotted out that this seems
triggered by DPMS transition. A patch like below actually fixes the
problem.
Of course it doesn't look like a right "fix". Do you guys have any
hint for further debugging?
Some more (not alt-) facts:
- The machine we've tested is a Cherry Trail based box with two
DisplayPorts. Intel team mentioned that there are other machines
suffering from the same problem.
- With some monitors, the screen remains blank during boot and on X.
This can be cured after "xset dpms force off" and resume, or
reconfiguring via xrandr.
- The issue seems specific to DP connections. When two (identical)
monitors are connected, only one monitor goes blank.
- The issue happens only with some monitor models (Dell E-series).
Other Dell monitors (e.g. U-series) or other vendors seem working as
far as we've tested.
- Intel team mentioned that a similar issue was seen on a Baytrail
machine.
- The register value seems passed correctly. The read back after the
register write showed the expected value.
Also, spinning more times in DPMS_ON loop didn't help, too.
- The issue is reproduced with the recent kernels (at least 4.9.x)
Any comments / suggestions appreciated.
thanks,
Takashi
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2205,8 +2205,12 @@ void intel_dp_sink_dpms(struct intel_dp
return;
if (mode != DRM_MODE_DPMS_ON) {
+#if 0
ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
DP_SET_POWER_D3);
+#else
+ ret = 1;
+#endif
} else {
/*
* When turning on, we need to retry for 1ms to give the sink
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