[drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!

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* [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
@ 2015-10-01  9:41 Jiri Kosina
  2015-10-01 11:13 ` Ville Syrjälä
  0 siblings, 1 reply; 3+ messages in thread
From: Jiri Kosina @ 2015-10-01  9:41 UTC (permalink / raw)
  To: ville.syrjala, maarten.lankhorst; +Cc: linux-kernel, intel-gfx

Hi,

since I've updated on my thinkpad x200s to latest Linus' tree (3235031), I 
am getting a lot of

	[drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!

googling revealed this patch:

	http://permalink.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/67471

is there any reason why it's not present upstream?

Thanks,

-- 
Jiri Kosina
SUSE Labs

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
  2015-10-01  9:41 [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0! Jiri Kosina
@ 2015-10-01 11:13 ` Ville Syrjälä
  2015-10-01 14:42   ` Jiri Kosina
  0 siblings, 1 reply; 3+ messages in thread
From: Ville Syrjälä @ 2015-10-01 11:13 UTC (permalink / raw)
  To: Jiri Kosina; +Cc: intel-gfx, linux-kernel

On Thu, Oct 01, 2015 at 11:41:34AM +0200, Jiri Kosina wrote:
> Hi,
> 
> since I've updated on my thinkpad x200s to latest Linus' tree (3235031), I 
> am getting a lot of
> 
> 	[drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!

What's a lot? I think you should see at most a few during driver load,
and maybe resume.

If you're seeing more during runtime, then I think there must be a more
serious bug somewhere.

> 
> googling revealed this patch:
> 
> 	http://permalink.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/67471
> 
> is there any reason why it's not present upstream?

There's a v2 of that patch in some tree. Hmm. Seems to be in
drm-intel-next-queued. Maybe it should get bumped to -fixes?

There's also another one that kills some of those message on certain
platforms:
0f64614dde17 drm/i915: Fix clock readout when pipes are enabled w/o ports

-- 
Ville Syrjälä
Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
  2015-10-01 11:13 ` Ville Syrjälä
@ 2015-10-01 14:42   ` Jiri Kosina
  0 siblings, 0 replies; 3+ messages in thread
From: Jiri Kosina @ 2015-10-01 14:42 UTC (permalink / raw)
  To: Ville Syrjälä
  Cc: maarten.lankhorst, linux-kernel, intel-gfx, Jani Nikula

On Thu, 1 Oct 2015, Ville Syrjälä wrote:

> > since I've updated on my thinkpad x200s to latest Linus' tree (3235031), I 
> > am getting a lot of
> > 
> > 	[drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
> 
> What's a lot? I think you should see at most a few during driver load,
> and maybe resume.

[    3.756567] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 24: Can't calculate constants, dotclock = 0!
[ 7771.241748] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[ 9152.628287] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[ 9512.095867] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[10048.228482] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[10142.184977] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[12493.752024] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[15632.648128] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[15716.797901] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[16556.733077] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[17512.064180] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[20715.628417] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[21320.640013] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[22683.175822] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[25220.245033] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[26368.499920] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[26512.968766] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[26591.247879] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[26743.192682] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[27078.552137] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[27211.084856] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[27351.736901] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[27786.483885] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[28338.355034] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[28547.083901] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[29467.645962] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[29716.963667] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[30569.185842] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[30793.842093] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[31272.401593] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[31850.805163] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[32128.428781] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[32354.066889] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[40041.595879] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[47064.983235] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[47762.080168] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[48104.316468] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[52426.688693] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[54151.332341] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[55787.948272] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
[82084.602344] [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!

This is mostly around suspend/resume cycles, but there are exceptions, for 
example the ones between 25220.245033 and 47064.983235 are contiguous and 
don't contain any other message in between (i.e. no suspend/resume 
happening either).

Thanks,

-- 
Jiri Kosina
SUSE Labs

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2015-10-01 14:42 UTC | newest]

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2015-10-01  9:41 [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0! Jiri Kosina
2015-10-01 11:13 ` Ville Syrjälä
2015-10-01 14:42   ` Jiri Kosina

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