[PATCH] drm: adv7511: really enable interrupts for EDID detection

[Lars-Peter Clausen]

On 11/25/2015 09:27 AM, Wolfram Sang wrote:
> 
>> I guess you mean that the GPIO callbacks include Runtime PM handling
>> however for irq_chip Runtime PM may not be hooked up so the GPIO block
>> is in such case is not powered on / get clock enabled?
> 
> Yes. There is another drawback when GPIOs are not properly requested. It
> is still possible to request them from userspace although a kernel
> driver is using them. I am playing with the idea that the GPIO core
> auto-requests GPIOs which are not already requested but still set up as
> interrupts.

I think the GPIO core already reserves the pins that are requested as IRQs.
See gpiochip_lock_as_irq().

As for PM see this discussion
http://lkml.iu.edu/hypermail/linux/kernel/1511.1/01645.html

- Lars


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: OpenPGP digital signature
URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20151126/de4e15fc/attachment.sig>