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Re: [REGRESSION] i915: No HDMI output with 4.4

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  Re: [REGRESSION] i915: No HDMI output with 4.4 Ville Syrjälä <ville.syrjala@linux.intel.com> - 2016-02-23 16:10 +0100
    Re: [REGRESSION] i915: No HDMI output with 4.4 "Jindal, Sonika" <sonika.jindal@intel.com> - 2016-02-24 05:50 +0100
      Re: [REGRESSION] i915: No HDMI output with 4.4 Oleksandr Natalenko <oleksandr@natalenko.name> - 2016-02-24 17:50 +0100
    RE: [REGRESSION] i915: No HDMI output with 4.4 "Sharma, Shashank" <shashank.sharma@intel.com> - 2016-02-24 07:10 +0100
      RE: [REGRESSION] i915: No HDMI output with 4.4 "Sharma, Shashank" <shashank.sharma@intel.com> - 2016-02-29 16:20 +0100
        RE: [REGRESSION] i915: No HDMI output with 4.4 "Sharma, Shashank" <shashank.sharma@intel.com> - 2016-02-29 16:50 +0100
          Re: [REGRESSION] i915: No HDMI output with 4.4 Daniel Vetter <daniel@ffwll.ch> - 2016-02-29 18:10 +0100
        Re: [REGRESSION] i915: No HDMI output with 4.4 Daniel Vetter <daniel@ffwll.ch> - 2016-02-29 16:50 +0100
      Re: [REGRESSION] i915: No HDMI output with 4.4 Daniel Vetter <daniel@ffwll.ch> - 2016-02-29 16:20 +0100
    Re: [REGRESSION] i915: No HDMI output with 4.4 Oleksandr Natalenko <oleksandr@natalenko.name> - 2016-02-24 17:10 +0100

#1340734 — Re: [REGRESSION] i915: No HDMI output with 4.4

On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote:
> Ville, Daniel,
> 
> any additional info I could provide? I have to return dual-link DVI 
> cable back, so let me know if I could reveal more details if necessary.

Unfortunately I'm out of ideas for now. Daniel is on vacation.
Anyone else? VPG folks should take the ball here since they broke it.

In the meantime I think as a workaround I think you could use
something like video=HDMI-A-1:e on the kernel command line (not sure
I got the connector name right for your system). I think that should
result in the live status check to be skipped, at least when
populating the mode list.

Might be a good idea to collect all the information here and put in a
bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that
all the logs and such would be in one place.

> 
> Regards,
>    Oleksandr
> 
> 16.02.2016 14:54, Daniel Vetter написав:
> > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote:
> >> Ville, Daniel,
> >> 
> >> I've just got another monitor and another DVI-HDMI cable, and here 
> >> what I've
> >> got.
> >> 
> >> ===Single Link DVI-D cable with 3 different monitors===
> >> 
> >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP65HQ-P 
> >> ===
> >> not working
> > 
> > I presume the above LG screen is what you've called previously "old
> > monitor"?
> > 
> >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP67HQ-P 
> >> ===
> >> not working
> >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP55HQ-P 
> >> ===
> >> works!
> >> 
> >> ===Dual Link DVI-D cable with monitor that doesn't work with Single 
> >> Link
> >> cable===
> >> 
> >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 23MP65HQ-P 
> >> ===
> >> works!
> > 
> > Funky. Can you pls grab the debug logs (with the special patches from
> > Ville) for this case? I wonder why suddenly different cable and it 
> > works.
> > 
> > Also: Is this one of these older-ish screens where you must have a
> > dual-link cable to drive it at full resolution&refresh rate?
> > -Daniel
> > 
> > 
> >> ===Laptop with HDMI output===
> >> 
> >> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works!
> >> 
> >> I'd say that single link DVI cables are broken with new kernel, but 
> >> one of
> >> monitors could work with such a cable. So I have no idea :(.
> >> 
> >> Regards,
> >>   Oleksandr.
> >> 
> >> 15.02.2016 17:42, Daniel Vetter wrote:
> >> >The other downside is that it'll make us non-compliant, which was the
> >> >point of this entire ordeal: HDMI spec forbids us from starting any i2c
> >> >transactions when the hpd isn't signalling a present screen.
> >> >
> >> >So maybe we need to buy one of these broken screens.
> >> >
> >> >Oleksandr, what exact model are you using? And any chance that you could
> >> >test this on some other machine with intel gfx and latest kernel, just to
> >> >make sure this really is some issue with the sink and not with the machine
> >> >itself? And I guess you've tested with some other hdmi sink, and that
> >> >works?

-- 
Ville Syrjälä
Intel OTC

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#1341458

On 2/23/2016 8:38 PM, Ville Syrjälä wrote:
> On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote:
>> Ville, Daniel,
>>
>> any additional info I could provide? I have to return dual-link DVI
>> cable back, so let me know if I could reveal more details if necessary.
> Unfortunately I'm out of ideas for now. Daniel is on vacation.
> Anyone else? VPG folks should take the ball here since they broke it.
>
> In the meantime I think as a workaround I think you could use
> something like video=HDMI-A-1:e on the kernel command line (not sure
> I got the connector name right for your system). I think that should
> result in the live status check to be skipped, at least when
> populating the mode list.
>
> Might be a good idea to collect all the information here and put in a
> bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that
> all the logs and such would be in one place.
>
>> Regards,
>>     Oleksandr
>>
>> 16.02.2016 14:54, Daniel Vetter написав:
>>> On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote:
>>>> Ville, Daniel,
>>>>
>>>> I've just got another monitor and another DVI-HDMI cable, and here
>>>> what I've
>>>> got.
>>>>
>>>> ===Single Link DVI-D cable with 3 different monitors===
>>>>
>>>> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP65HQ-P
>>>> ===
>>>> not working
>>> I presume the above LG screen is what you've called previously "old
>>> monitor"?
>>>
>>>> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP67HQ-P
>>>> ===
>>>> not working
Do you have logs for the failure with the single link hdmi cable and the 
register dump which you have given for the working case?
If not, can you please capture the logs and register dump.
Also which platform is this?
If it is live status related issue, we need to see how long it is taking 
to set the live status, or is it not setting it at all with the 
single-link cable?


>>>> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 23MP55HQ-P
>>>> ===
>>>> works!
>>>>
>>>> ===Dual Link DVI-D cable with monitor that doesn't work with Single
>>>> Link
>>>> cable===
>>>>
>>>> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 23MP65HQ-P
>>>> ===
>>>> works!
>>> Funky. Can you pls grab the debug logs (with the special patches from
>>> Ville) for this case? I wonder why suddenly different cable and it
>>> works.
>>>
>>> Also: Is this one of these older-ish screens where you must have a
>>> dual-link cable to drive it at full resolution&refresh rate?
>>> -Daniel
>>>
>>>
>>>> ===Laptop with HDMI output===
>>>>
>>>> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works!
>>>>
>>>> I'd say that single link DVI cables are broken with new kernel, but
>>>> one of
>>>> monitors could work with such a cable. So I have no idea :(.
>>>>
>>>> Regards,
>>>>    Oleksandr.
>>>>
>>>> 15.02.2016 17:42, Daniel Vetter wrote:
>>>>> The other downside is that it'll make us non-compliant, which was the
>>>>> point of this entire ordeal: HDMI spec forbids us from starting any i2c
>>>>> transactions when the hpd isn't signalling a present screen.
>>>>>
>>>>> So maybe we need to buy one of these broken screens.
>>>>>
>>>>> Oleksandr, what exact model are you using? And any chance that you could
>>>>> test this on some other machine with intel gfx and latest kernel, just to
>>>>> make sure this really is some issue with the sink and not with the machine
>>>>> itself? And I guess you've tested with some other hdmi sink, and that
>>>>> works?

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#1342210

24.02.2016 06:40, Jindal, Sonika написав:
> Do you have logs for the failure with the single link hdmi cable and
> the register dump which you have given for the working case?
> If not, can you please capture the logs and register dump.
> Also which platform is this?
> If it is live status related issue, we need to see how long it is
> taking to set the live status, or is it not setting it at all with the
> single-link cable?

Emm, I've already posted all requested logs and dumps in this thread 
before.

Any additional logs/dumps needed?

Thanks,
   Oleksandr.

[toc] | [prev] | [next] | [standalone]

#1341592

Hi Ville, 
We will look into this in sometime. Right now team is slightly loaded due to project milestone. 
Last time I looked into this, we dint have this HW to reproduce this issue.

Regards
Shashank
-----Original Message-----
From: Ville Syrjälä [mailto:ville.syrjala@linux.intel.com] 
Sent: Tuesday, February 23, 2016 8:38 PM
To: Oleksandr Natalenko
Cc: Vetter, Daniel; intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Daniel Vetter; Jindal, Sonika; Sharma, Shashank; Wang, Gary C
Subject: Re: [REGRESSION] i915: No HDMI output with 4.4

On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote:
> Ville, Daniel,
> 
> any additional info I could provide? I have to return dual-link DVI 
> cable back, so let me know if I could reveal more details if necessary.

Unfortunately I'm out of ideas for now. Daniel is on vacation.
Anyone else? VPG folks should take the ball here since they broke it.

In the meantime I think as a workaround I think you could use something like video=HDMI-A-1:e on the kernel command line (not sure I got the connector name right for your system). I think that should result in the live status check to be skipped, at least when populating the mode list.

Might be a good idea to collect all the information here and put in a bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that all the logs and such would be in one place.

> 
> Regards,
>    Oleksandr
> 
> 16.02.2016 14:54, Daniel Vetter написав:
> > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote:
> >> Ville, Daniel,
> >> 
> >> I've just got another monitor and another DVI-HDMI cable, and here 
> >> what I've got.
> >> 
> >> ===Single Link DVI-D cable with 3 different monitors===
> >> 
> >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> >> 23MP65HQ-P === not working
> > 
> > I presume the above LG screen is what you've called previously "old 
> > monitor"?
> > 
> >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> >> 23MP67HQ-P === not working Computer DVI ——— DVI-D (Single 
> >> Link)/HDMI cable ——— HDMI LG 23MP55HQ-P === works!
> >> 
> >> ===Dual Link DVI-D cable with monitor that doesn't work with Single 
> >> Link cable===
> >> 
> >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 
> >> 23MP65HQ-P === works!
> > 
> > Funky. Can you pls grab the debug logs (with the special patches 
> > from
> > Ville) for this case? I wonder why suddenly different cable and it 
> > works.
> > 
> > Also: Is this one of these older-ish screens where you must have a 
> > dual-link cable to drive it at full resolution&refresh rate?
> > -Daniel
> > 
> > 
> >> ===Laptop with HDMI output===
> >> 
> >> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works!
> >> 
> >> I'd say that single link DVI cables are broken with new kernel, but 
> >> one of monitors could work with such a cable. So I have no idea :(.
> >> 
> >> Regards,
> >>   Oleksandr.
> >> 
> >> 15.02.2016 17:42, Daniel Vetter wrote:
> >> >The other downside is that it'll make us non-compliant, which was 
> >> >the point of this entire ordeal: HDMI spec forbids us from 
> >> >starting any i2c transactions when the hpd isn't signalling a present screen.
> >> >
> >> >So maybe we need to buy one of these broken screens.
> >> >
> >> >Oleksandr, what exact model are you using? And any chance that you 
> >> >could test this on some other machine with intel gfx and latest 
> >> >kernel, just to make sure this really is some issue with the sink 
> >> >and not with the machine itself? And I guess you've tested with 
> >> >some other hdmi sink, and that works?

--
Ville Syrjälä
Intel OTC

[toc] | [prev] | [next] | [standalone]

#1345898

Please see the latest mail chain, Sonika has already started on it.

Regards
Shashank

-----Original Message-----
From: Daniel Vetter [mailto:daniel.vetter@ffwll.ch] On Behalf Of Daniel Vetter
Sent: Monday, February 29, 2016 8:44 PM
To: Sharma, Shashank
Cc: Ville Syrjälä; Oleksandr Natalenko; Vetter, Daniel; intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Daniel Vetter; Jindal, Sonika; Wang, Gary C
Subject: Re: [REGRESSION] i915: No HDMI output with 4.4

On Wed, Feb 24, 2016 at 06:07:25AM +0000, Sharma, Shashank wrote:
> Hi Ville,
> We will look into this in sometime. Right now team is slightly loaded due to project milestone. 
> Last time I looked into this, we dint have this HW to reproduce this issue.

This is an upstream regression. Either you can handle it, or your code must be reverted again. Please either assign someone for this, or send in the patch to revert.

I'll discuss this with Indranil, too.

Thanks, Daniel
> 
> Regards
> Shashank
> -----Original Message-----
> From: Ville Syrjälä [mailto:ville.syrjala@linux.intel.com]
> Sent: Tuesday, February 23, 2016 8:38 PM
> To: Oleksandr Natalenko
> Cc: Vetter, Daniel; intel-gfx@lists.freedesktop.org; 
> dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Daniel 
> Vetter; Jindal, Sonika; Sharma, Shashank; Wang, Gary C
> Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> 
> On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote:
> > Ville, Daniel,
> > 
> > any additional info I could provide? I have to return dual-link DVI 
> > cable back, so let me know if I could reveal more details if necessary.
> 
> Unfortunately I'm out of ideas for now. Daniel is on vacation.
> Anyone else? VPG folks should take the ball here since they broke it.
> 
> In the meantime I think as a workaround I think you could use something like video=HDMI-A-1:e on the kernel command line (not sure I got the connector name right for your system). I think that should result in the live status check to be skipped, at least when populating the mode list.
> 
> Might be a good idea to collect all the information here and put in a bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that all the logs and such would be in one place.
> 
> > 
> > Regards,
> >    Oleksandr
> > 
> > 16.02.2016 14:54, Daniel Vetter написав:
> > > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote:
> > >> Ville, Daniel,
> > >> 
> > >> I've just got another monitor and another DVI-HDMI cable, and 
> > >> here what I've got.
> > >> 
> > >> ===Single Link DVI-D cable with 3 different monitors===
> > >> 
> > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > >> 23MP65HQ-P === not working
> > > 
> > > I presume the above LG screen is what you've called previously 
> > > "old monitor"?
> > > 
> > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > >> 23MP67HQ-P === not working Computer DVI ——— DVI-D (Single 
> > >> Link)/HDMI cable ——— HDMI LG 23MP55HQ-P === works!
> > >> 
> > >> ===Dual Link DVI-D cable with monitor that doesn't work with 
> > >> Single Link cable===
> > >> 
> > >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 
> > >> 23MP65HQ-P === works!
> > > 
> > > Funky. Can you pls grab the debug logs (with the special patches 
> > > from
> > > Ville) for this case? I wonder why suddenly different cable and it 
> > > works.
> > > 
> > > Also: Is this one of these older-ish screens where you must have a 
> > > dual-link cable to drive it at full resolution&refresh rate?
> > > -Daniel
> > > 
> > > 
> > >> ===Laptop with HDMI output===
> > >> 
> > >> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works!
> > >> 
> > >> I'd say that single link DVI cables are broken with new kernel, 
> > >> but one of monitors could work with such a cable. So I have no idea :(.
> > >> 
> > >> Regards,
> > >>   Oleksandr.
> > >> 
> > >> 15.02.2016 17:42, Daniel Vetter wrote:
> > >> >The other downside is that it'll make us non-compliant, which 
> > >> >was the point of this entire ordeal: HDMI spec forbids us from 
> > >> >starting any i2c transactions when the hpd isn't signalling a present screen.
> > >> >
> > >> >So maybe we need to buy one of these broken screens.
> > >> >
> > >> >Oleksandr, what exact model are you using? And any chance that 
> > >> >you could test this on some other machine with intel gfx and 
> > >> >latest kernel, just to make sure this really is some issue with 
> > >> >the sink and not with the machine itself? And I guess you've 
> > >> >tested with some other hdmi sink, and that works?
> 
> --
> Ville Syrjälä
> Intel OTC

--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

[toc] | [prev] | [next] | [standalone]

#1345920

No problems, I guessed the mail situation :)

Regards
Shashank
-----Original Message-----
From: Daniel Vetter [mailto:daniel.vetter@ffwll.ch] On Behalf Of Daniel Vetter
Sent: Monday, February 29, 2016 9:12 PM
To: Sharma, Shashank
Cc: Daniel Vetter; Ville Syrjälä; Oleksandr Natalenko; Vetter, Daniel; intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Daniel Vetter; Jindal, Sonika; Wang, Gary C
Subject: Re: [REGRESSION] i915: No HDMI output with 4.4

On Mon, Feb 29, 2016 at 03:16:08PM +0000, Sharma, Shashank wrote:
> Please see the latest mail chain, Sonika has already started on it.

Ah ok, crawling through 1k mails after one week of vacation, so I'm still catching up ;-) My apologies for the confusion.

Thanks, Daniel
> 
> Regards
> Shashank
> 
> -----Original Message-----
> From: Daniel Vetter [mailto:daniel.vetter@ffwll.ch] On Behalf Of 
> Daniel Vetter
> Sent: Monday, February 29, 2016 8:44 PM
> To: Sharma, Shashank
> Cc: Ville Syrjälä; Oleksandr Natalenko; Vetter, Daniel; 
> intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; 
> linux-kernel@vger.kernel.org; Daniel Vetter; Jindal, Sonika; Wang, 
> Gary C
> Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> 
> On Wed, Feb 24, 2016 at 06:07:25AM +0000, Sharma, Shashank wrote:
> > Hi Ville,
> > We will look into this in sometime. Right now team is slightly loaded due to project milestone. 
> > Last time I looked into this, we dint have this HW to reproduce this issue.
> 
> This is an upstream regression. Either you can handle it, or your code must be reverted again. Please either assign someone for this, or send in the patch to revert.
> 
> I'll discuss this with Indranil, too.
> 
> Thanks, Daniel
> > 
> > Regards
> > Shashank
> > -----Original Message-----
> > From: Ville Syrjälä [mailto:ville.syrjala@linux.intel.com]
> > Sent: Tuesday, February 23, 2016 8:38 PM
> > To: Oleksandr Natalenko
> > Cc: Vetter, Daniel; intel-gfx@lists.freedesktop.org; 
> > dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; 
> > Daniel Vetter; Jindal, Sonika; Sharma, Shashank; Wang, Gary C
> > Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> > 
> > On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote:
> > > Ville, Daniel,
> > > 
> > > any additional info I could provide? I have to return dual-link 
> > > DVI cable back, so let me know if I could reveal more details if necessary.
> > 
> > Unfortunately I'm out of ideas for now. Daniel is on vacation.
> > Anyone else? VPG folks should take the ball here since they broke it.
> > 
> > In the meantime I think as a workaround I think you could use something like video=HDMI-A-1:e on the kernel command line (not sure I got the connector name right for your system). I think that should result in the live status check to be skipped, at least when populating the mode list.
> > 
> > Might be a good idea to collect all the information here and put in a bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that all the logs and such would be in one place.
> > 
> > > 
> > > Regards,
> > >    Oleksandr
> > > 
> > > 16.02.2016 14:54, Daniel Vetter написав:
> > > > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote:
> > > >> Ville, Daniel,
> > > >> 
> > > >> I've just got another monitor and another DVI-HDMI cable, and 
> > > >> here what I've got.
> > > >> 
> > > >> ===Single Link DVI-D cable with 3 different monitors===
> > > >> 
> > > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > > >> 23MP65HQ-P === not working
> > > > 
> > > > I presume the above LG screen is what you've called previously 
> > > > "old monitor"?
> > > > 
> > > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > > >> 23MP67HQ-P === not working Computer DVI ——— DVI-D (Single 
> > > >> Link)/HDMI cable ——— HDMI LG 23MP55HQ-P === works!
> > > >> 
> > > >> ===Dual Link DVI-D cable with monitor that doesn't work with 
> > > >> Single Link cable===
> > > >> 
> > > >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 
> > > >> 23MP65HQ-P === works!
> > > > 
> > > > Funky. Can you pls grab the debug logs (with the special patches 
> > > > from
> > > > Ville) for this case? I wonder why suddenly different cable and 
> > > > it works.
> > > > 
> > > > Also: Is this one of these older-ish screens where you must have 
> > > > a dual-link cable to drive it at full resolution&refresh rate?
> > > > -Daniel
> > > > 
> > > > 
> > > >> ===Laptop with HDMI output===
> > > >> 
> > > >> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works!
> > > >> 
> > > >> I'd say that single link DVI cables are broken with new kernel, 
> > > >> but one of monitors could work with such a cable. So I have no idea :(.
> > > >> 
> > > >> Regards,
> > > >>   Oleksandr.
> > > >> 
> > > >> 15.02.2016 17:42, Daniel Vetter wrote:
> > > >> >The other downside is that it'll make us non-compliant, which 
> > > >> >was the point of this entire ordeal: HDMI spec forbids us from 
> > > >> >starting any i2c transactions when the hpd isn't signalling a present screen.
> > > >> >
> > > >> >So maybe we need to buy one of these broken screens.
> > > >> >
> > > >> >Oleksandr, what exact model are you using? And any chance that 
> > > >> >you could test this on some other machine with intel gfx and 
> > > >> >latest kernel, just to make sure this really is some issue 
> > > >> >with the sink and not with the machine itself? And I guess 
> > > >> >you've tested with some other hdmi sink, and that works?
> > 
> > --
> > Ville Syrjälä
> > Intel OTC
> 
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

[toc] | [prev] | [next] | [standalone]

#1346004

On Mon, Feb 29, 2016 at 03:41:59PM +0000, Sharma, Shashank wrote:
> No problems, I guessed the mail situation :)

Ok, caught up now, at least on dri-devel. There's 2 bug report mail
threads:
- A new one from Oleksandr, still being investigated.
- This one here where Sonika asked for some logs from Nick, but Nick has
  already provided those. Since then (24th Feb) nothing new seems to have
  happened.

There's also other threads in the past, but I think we have resolved them
all. I guess we need to start tracking all these in some JIRA? I'll bring
this up in tomorrow's display sync meeting.

Thanks, Daniel
> 
> Regards
> Shashank
> -----Original Message-----
> From: Daniel Vetter [mailto:daniel.vetter@ffwll.ch] On Behalf Of Daniel Vetter
> Sent: Monday, February 29, 2016 9:12 PM
> To: Sharma, Shashank
> Cc: Daniel Vetter; Ville Syrjälä; Oleksandr Natalenko; Vetter, Daniel; intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Daniel Vetter; Jindal, Sonika; Wang, Gary C
> Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> 
> On Mon, Feb 29, 2016 at 03:16:08PM +0000, Sharma, Shashank wrote:
> > Please see the latest mail chain, Sonika has already started on it.
> 
> Ah ok, crawling through 1k mails after one week of vacation, so I'm still catching up ;-) My apologies for the confusion.
> 
> Thanks, Daniel
> > 
> > Regards
> > Shashank
> > 
> > -----Original Message-----
> > From: Daniel Vetter [mailto:daniel.vetter@ffwll.ch] On Behalf Of 
> > Daniel Vetter
> > Sent: Monday, February 29, 2016 8:44 PM
> > To: Sharma, Shashank
> > Cc: Ville Syrjälä; Oleksandr Natalenko; Vetter, Daniel; 
> > intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; 
> > linux-kernel@vger.kernel.org; Daniel Vetter; Jindal, Sonika; Wang, 
> > Gary C
> > Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> > 
> > On Wed, Feb 24, 2016 at 06:07:25AM +0000, Sharma, Shashank wrote:
> > > Hi Ville,
> > > We will look into this in sometime. Right now team is slightly loaded due to project milestone. 
> > > Last time I looked into this, we dint have this HW to reproduce this issue.
> > 
> > This is an upstream regression. Either you can handle it, or your code must be reverted again. Please either assign someone for this, or send in the patch to revert.
> > 
> > I'll discuss this with Indranil, too.
> > 
> > Thanks, Daniel
> > > 
> > > Regards
> > > Shashank
> > > -----Original Message-----
> > > From: Ville Syrjälä [mailto:ville.syrjala@linux.intel.com]
> > > Sent: Tuesday, February 23, 2016 8:38 PM
> > > To: Oleksandr Natalenko
> > > Cc: Vetter, Daniel; intel-gfx@lists.freedesktop.org; 
> > > dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; 
> > > Daniel Vetter; Jindal, Sonika; Sharma, Shashank; Wang, Gary C
> > > Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> > > 
> > > On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote:
> > > > Ville, Daniel,
> > > > 
> > > > any additional info I could provide? I have to return dual-link 
> > > > DVI cable back, so let me know if I could reveal more details if necessary.
> > > 
> > > Unfortunately I'm out of ideas for now. Daniel is on vacation.
> > > Anyone else? VPG folks should take the ball here since they broke it.
> > > 
> > > In the meantime I think as a workaround I think you could use something like video=HDMI-A-1:e on the kernel command line (not sure I got the connector name right for your system). I think that should result in the live status check to be skipped, at least when populating the mode list.
> > > 
> > > Might be a good idea to collect all the information here and put in a bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that all the logs and such would be in one place.
> > > 
> > > > 
> > > > Regards,
> > > >    Oleksandr
> > > > 
> > > > 16.02.2016 14:54, Daniel Vetter написав:
> > > > > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote:
> > > > >> Ville, Daniel,
> > > > >> 
> > > > >> I've just got another monitor and another DVI-HDMI cable, and 
> > > > >> here what I've got.
> > > > >> 
> > > > >> ===Single Link DVI-D cable with 3 different monitors===
> > > > >> 
> > > > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > > > >> 23MP65HQ-P === not working
> > > > > 
> > > > > I presume the above LG screen is what you've called previously 
> > > > > "old monitor"?
> > > > > 
> > > > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > > > >> 23MP67HQ-P === not working Computer DVI ——— DVI-D (Single 
> > > > >> Link)/HDMI cable ——— HDMI LG 23MP55HQ-P === works!
> > > > >> 
> > > > >> ===Dual Link DVI-D cable with monitor that doesn't work with 
> > > > >> Single Link cable===
> > > > >> 
> > > > >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 
> > > > >> 23MP65HQ-P === works!
> > > > > 
> > > > > Funky. Can you pls grab the debug logs (with the special patches 
> > > > > from
> > > > > Ville) for this case? I wonder why suddenly different cable and 
> > > > > it works.
> > > > > 
> > > > > Also: Is this one of these older-ish screens where you must have 
> > > > > a dual-link cable to drive it at full resolution&refresh rate?
> > > > > -Daniel
> > > > > 
> > > > > 
> > > > >> ===Laptop with HDMI output===
> > > > >> 
> > > > >> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works!
> > > > >> 
> > > > >> I'd say that single link DVI cables are broken with new kernel, 
> > > > >> but one of monitors could work with such a cable. So I have no idea :(.
> > > > >> 
> > > > >> Regards,
> > > > >>   Oleksandr.
> > > > >> 
> > > > >> 15.02.2016 17:42, Daniel Vetter wrote:
> > > > >> >The other downside is that it'll make us non-compliant, which 
> > > > >> >was the point of this entire ordeal: HDMI spec forbids us from 
> > > > >> >starting any i2c transactions when the hpd isn't signalling a present screen.
> > > > >> >
> > > > >> >So maybe we need to buy one of these broken screens.
> > > > >> >
> > > > >> >Oleksandr, what exact model are you using? And any chance that 
> > > > >> >you could test this on some other machine with intel gfx and 
> > > > >> >latest kernel, just to make sure this really is some issue 
> > > > >> >with the sink and not with the machine itself? And I guess 
> > > > >> >you've tested with some other hdmi sink, and that works?
> > > 
> > > --
> > > Ville Syrjälä
> > > Intel OTC
> > 
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
> 
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

[toc] | [prev] | [next] | [standalone]

#1345926

On Mon, Feb 29, 2016 at 03:16:08PM +0000, Sharma, Shashank wrote:
> Please see the latest mail chain, Sonika has already started on it.

Ah ok, crawling through 1k mails after one week of vacation, so I'm still
catching up ;-) My apologies for the confusion.

Thanks, Daniel
> 
> Regards
> Shashank
> 
> -----Original Message-----
> From: Daniel Vetter [mailto:daniel.vetter@ffwll.ch] On Behalf Of Daniel Vetter
> Sent: Monday, February 29, 2016 8:44 PM
> To: Sharma, Shashank
> Cc: Ville Syrjälä; Oleksandr Natalenko; Vetter, Daniel; intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Daniel Vetter; Jindal, Sonika; Wang, Gary C
> Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> 
> On Wed, Feb 24, 2016 at 06:07:25AM +0000, Sharma, Shashank wrote:
> > Hi Ville,
> > We will look into this in sometime. Right now team is slightly loaded due to project milestone. 
> > Last time I looked into this, we dint have this HW to reproduce this issue.
> 
> This is an upstream regression. Either you can handle it, or your code must be reverted again. Please either assign someone for this, or send in the patch to revert.
> 
> I'll discuss this with Indranil, too.
> 
> Thanks, Daniel
> > 
> > Regards
> > Shashank
> > -----Original Message-----
> > From: Ville Syrjälä [mailto:ville.syrjala@linux.intel.com]
> > Sent: Tuesday, February 23, 2016 8:38 PM
> > To: Oleksandr Natalenko
> > Cc: Vetter, Daniel; intel-gfx@lists.freedesktop.org; 
> > dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Daniel 
> > Vetter; Jindal, Sonika; Sharma, Shashank; Wang, Gary C
> > Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> > 
> > On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote:
> > > Ville, Daniel,
> > > 
> > > any additional info I could provide? I have to return dual-link DVI 
> > > cable back, so let me know if I could reveal more details if necessary.
> > 
> > Unfortunately I'm out of ideas for now. Daniel is on vacation.
> > Anyone else? VPG folks should take the ball here since they broke it.
> > 
> > In the meantime I think as a workaround I think you could use something like video=HDMI-A-1:e on the kernel command line (not sure I got the connector name right for your system). I think that should result in the live status check to be skipped, at least when populating the mode list.
> > 
> > Might be a good idea to collect all the information here and put in a bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that all the logs and such would be in one place.
> > 
> > > 
> > > Regards,
> > >    Oleksandr
> > > 
> > > 16.02.2016 14:54, Daniel Vetter написав:
> > > > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote:
> > > >> Ville, Daniel,
> > > >> 
> > > >> I've just got another monitor and another DVI-HDMI cable, and 
> > > >> here what I've got.
> > > >> 
> > > >> ===Single Link DVI-D cable with 3 different monitors===
> > > >> 
> > > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > > >> 23MP65HQ-P === not working
> > > > 
> > > > I presume the above LG screen is what you've called previously 
> > > > "old monitor"?
> > > > 
> > > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > > >> 23MP67HQ-P === not working Computer DVI ——— DVI-D (Single 
> > > >> Link)/HDMI cable ——— HDMI LG 23MP55HQ-P === works!
> > > >> 
> > > >> ===Dual Link DVI-D cable with monitor that doesn't work with 
> > > >> Single Link cable===
> > > >> 
> > > >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 
> > > >> 23MP65HQ-P === works!
> > > > 
> > > > Funky. Can you pls grab the debug logs (with the special patches 
> > > > from
> > > > Ville) for this case? I wonder why suddenly different cable and it 
> > > > works.
> > > > 
> > > > Also: Is this one of these older-ish screens where you must have a 
> > > > dual-link cable to drive it at full resolution&refresh rate?
> > > > -Daniel
> > > > 
> > > > 
> > > >> ===Laptop with HDMI output===
> > > >> 
> > > >> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works!
> > > >> 
> > > >> I'd say that single link DVI cables are broken with new kernel, 
> > > >> but one of monitors could work with such a cable. So I have no idea :(.
> > > >> 
> > > >> Regards,
> > > >>   Oleksandr.
> > > >> 
> > > >> 15.02.2016 17:42, Daniel Vetter wrote:
> > > >> >The other downside is that it'll make us non-compliant, which 
> > > >> >was the point of this entire ordeal: HDMI spec forbids us from 
> > > >> >starting any i2c transactions when the hpd isn't signalling a present screen.
> > > >> >
> > > >> >So maybe we need to buy one of these broken screens.
> > > >> >
> > > >> >Oleksandr, what exact model are you using? And any chance that 
> > > >> >you could test this on some other machine with intel gfx and 
> > > >> >latest kernel, just to make sure this really is some issue with 
> > > >> >the sink and not with the machine itself? And I guess you've 
> > > >> >tested with some other hdmi sink, and that works?
> > 
> > --
> > Ville Syrjälä
> > Intel OTC
> 
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

[toc] | [prev] | [next] | [standalone]

#1345899

On Wed, Feb 24, 2016 at 06:07:25AM +0000, Sharma, Shashank wrote:
> Hi Ville, 
> We will look into this in sometime. Right now team is slightly loaded due to project milestone. 
> Last time I looked into this, we dint have this HW to reproduce this issue.

This is an upstream regression. Either you can handle it, or your code
must be reverted again. Please either assign someone for this, or send in
the patch to revert.

I'll discuss this with Indranil, too.

Thanks, Daniel
> 
> Regards
> Shashank
> -----Original Message-----
> From: Ville Syrjälä [mailto:ville.syrjala@linux.intel.com] 
> Sent: Tuesday, February 23, 2016 8:38 PM
> To: Oleksandr Natalenko
> Cc: Vetter, Daniel; intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Daniel Vetter; Jindal, Sonika; Sharma, Shashank; Wang, Gary C
> Subject: Re: [REGRESSION] i915: No HDMI output with 4.4
> 
> On Mon, Feb 22, 2016 at 02:32:32PM +0200, Oleksandr Natalenko wrote:
> > Ville, Daniel,
> > 
> > any additional info I could provide? I have to return dual-link DVI 
> > cable back, so let me know if I could reveal more details if necessary.
> 
> Unfortunately I'm out of ideas for now. Daniel is on vacation.
> Anyone else? VPG folks should take the ball here since they broke it.
> 
> In the meantime I think as a workaround I think you could use something like video=HDMI-A-1:e on the kernel command line (not sure I got the connector name right for your system). I think that should result in the live status check to be skipped, at least when populating the mode list.
> 
> Might be a good idea to collect all the information here and put in a bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that all the logs and such would be in one place.
> 
> > 
> > Regards,
> >    Oleksandr
> > 
> > 16.02.2016 14:54, Daniel Vetter написав:
> > > On Tue, Feb 16, 2016 at 12:58:56PM +0200, Oleksandr Natalenko wrote:
> > >> Ville, Daniel,
> > >> 
> > >> I've just got another monitor and another DVI-HDMI cable, and here 
> > >> what I've got.
> > >> 
> > >> ===Single Link DVI-D cable with 3 different monitors===
> > >> 
> > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > >> 23MP65HQ-P === not working
> > > 
> > > I presume the above LG screen is what you've called previously "old 
> > > monitor"?
> > > 
> > >> Computer DVI ——— DVI-D (Single Link)/HDMI cable ——— HDMI LG 
> > >> 23MP67HQ-P === not working Computer DVI ——— DVI-D (Single 
> > >> Link)/HDMI cable ——— HDMI LG 23MP55HQ-P === works!
> > >> 
> > >> ===Dual Link DVI-D cable with monitor that doesn't work with Single 
> > >> Link cable===
> > >> 
> > >> Computer DVI ——— DVI-D (Dual Link)/HDMI cable ——— HDMI LG 
> > >> 23MP65HQ-P === works!
> > > 
> > > Funky. Can you pls grab the debug logs (with the special patches 
> > > from
> > > Ville) for this case? I wonder why suddenly different cable and it 
> > > works.
> > > 
> > > Also: Is this one of these older-ish screens where you must have a 
> > > dual-link cable to drive it at full resolution&refresh rate?
> > > -Daniel
> > > 
> > > 
> > >> ===Laptop with HDMI output===
> > >> 
> > >> Laptop HDMI ——— HDMI/HDMI cable ——— HDMI LG 23MP65HQ-P === works!
> > >> 
> > >> I'd say that single link DVI cables are broken with new kernel, but 
> > >> one of monitors could work with such a cable. So I have no idea :(.
> > >> 
> > >> Regards,
> > >>   Oleksandr.
> > >> 
> > >> 15.02.2016 17:42, Daniel Vetter wrote:
> > >> >The other downside is that it'll make us non-compliant, which was 
> > >> >the point of this entire ordeal: HDMI spec forbids us from 
> > >> >starting any i2c transactions when the hpd isn't signalling a present screen.
> > >> >
> > >> >So maybe we need to buy one of these broken screens.
> > >> >
> > >> >Oleksandr, what exact model are you using? And any chance that you 
> > >> >could test this on some other machine with intel gfx and latest 
> > >> >kernel, just to make sure this really is some issue with the sink 
> > >> >and not with the machine itself? And I guess you've tested with 
> > >> >some other hdmi sink, and that works?
> 
> --
> Ville Syrjälä
> Intel OTC

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

[toc] | [prev] | [next] | [standalone]

#1342155

23.02.2016 17:08, Ville Syrjälä написав:
> In the meantime I think as a workaround I think you could use
> something like video=HDMI-A-1:e on the kernel command line (not sure
> I got the connector name right for your system). I think that should
> result in the live status check to be skipped, at least when
> populating the mode list.

This definitely did the trick for me:

===
[  +0.000354] [drm] forcing HDMI-A-1 connector ON
===

And single-link cable works now.

> Might be a good idea to collect all the information here and put in a
> bug report (https://bugs.freedesktop.org/ -> DRI -> DRM/Intel) so that
> all the logs and such would be in one place.

OK.

Thanks,
   Oleksandr.

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