[Intel-gfx] [PATCH 0/3] LPSS PWM support for devices that support it

[C. B.]

On 12 January 2016 at 08:59, Shobhit Kumar <shobhit.kumar at 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

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:

[   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