From: "Kumar, Shobhit" <shobhit.kumar@linux.intel.com>
To: "C. B." <cbrookes@gmail.com>,
Shobhit Kumar <shobhit.kumar@intel.com>,
intel-gfx@lists.freedesktop.org
Cc: Brain WrecK <bloften80@gmail.com>
Subject: Re: [PATCH 0/3] LPSS PWM support for devices that support it
Date: Wed, 13 Jan 2016 12:02:16 +0530 [thread overview]
Message-ID: <5695EF70.7030006@linux.intel.com> (raw)
In-Reply-To: <CAAzPvNxyqqtgWRFK+HCXJiuWkir+NpTNTJHWvxGkGKBq4kvdqQ@mail.gmail.com>
On 01/13/2016 11:00 AM, C. B. wrote:
> On 12 January 2016 at 08:59, Shobhit Kumar <shobhit.kumar@intel.com> wrote:
>
>> Not sending yet to pwm mailing list as this is all untested. C.B. please
>> test the patches and see if they work at all for you. For testing Please
>> enable -
>>
>> CONFIG_PWM_LPSS=y
>> CONFIG_PWM_LPSS_PLATFORM=y
>
> I applied these patches to 4.4-rc8. So far no progress:
>
> [ 14.251512] [drm:pwm_setup_backlight [i915]] *ERROR* Failed to own
> the pwm chip: pm_backlight
Are you sure this is pm_backlight, it should have printed pwm_backlight
as that is the name for the PMIC bases PWM. I checked the code and I
have not made a typo there.
>
> I dug in a little and found that dev_priv->vbt.dsi.config->pwm_blc ==
> 0, I wonder if some of these Dell Venue's have different hardware?
> This is the model I have:
>
This means that this device is using PMIC base PWM and not LPSS. I have
heard from Brain, that my CRC PWM driver is also broken in latest kernel
which should be probably used in this device. I am looking into that
separately.
Regards
Shobhit
> [ 16.370481] Hardware name: Dell Inc. Venue 8 Pro 5830/09RP78, BIOS
> A13 11/27/2015
>
> Let me know what I can provide to help
>
> CB
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
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next prev parent reply other threads:[~2016-01-13 6:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1452610789-30032-1-git-send-email-shobhit.kumar@intel.com>
2016-01-13 5:30 ` [PATCH 0/3] LPSS PWM support for devices that support it C. B.
2016-01-13 6:32 ` Kumar, Shobhit [this message]
[not found] <569757BE.7090009@gmail.com>
2016-01-14 8:13 ` Luka Karinja
2016-01-12 15:00 Shobhit Kumar
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