On Wednesday 06 April 2016 04:26 PM, Lluís Batlle i Rossell wrote:
On Tue, Apr 05, 2016 at 09:06:25PM +0200, Lluís Batlle i Rossell wrote:
On Tue, Apr 05, 2016 at 12:39:30PM +0200, Lluís Batlle i Rossell wrote:
On Tue, Apr 05, 2016 at 12:03:44PM +0530, Kumar, Shobhit wrote:
On Thursday 31 March 2016 03:57 PM, Lluís Batlle i Rossell wrote:
Hello,
I saw that you did some work for LPSS PWM:
https://lists.freedesktop.org/archives/intel-gfx/2016-January/085006.html
Definitely I was quite blind in my initial attempts at applying the
patches, and gave me the idea that they did not apply in any recent tree.
I've checked that they apply and build over the released 4.5, so I will go
testing that, maybe today. I will report.
The screen goes black, as before.
I attach the dmesg after applying the four patches (3 + 1) to 4.5.
PWM_LPSS=y and PWM_LPSS_PLATFORM=y
I also attach a dmesg of a panicked kernel that actually does run in that
board, so you can see that it is actually a lpss-pwm case.
I don't see any trace of pwm/lpss in dmesg, so it's normal that i915 fails
to find it. I wonder if there may be a problem in the ACPI table. I have
the DSDT and it clearly reports the:
Name (_CID, "80860F09") // _CID: Compatible ID
Name (_DDN, "Intel(R) PWM Controller #2 - 80860F09") // _DDN: DOS Device Name
Which should be the lpss pwm. But somehow it is not loaded, so I guess it
fails the probing.
Can we put some prints in the probe routines and see whats happening in
the pwm-lpss-platform.c driver. There is also a PCI PWM LPSS driver -
pwm-lpss-pci.c Can you also enable that and see if the probe for that is
being called and successful ?
Regards
Shobhit
Maybe the DSDT is broken, and I should fix and recompile a new one for the
pwm controller to work? I don't really know how this things work, and
whether the kernel should report anything special if it were the case of a
broken DSDT.
Regards,
Lluḉis.
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