Re: [IMX] [DRM]: suspend/resume support
From: Fabio Estevam
Date: Tue Jun 18 2019 - 11:14:18 EST
On Tue, Jun 18, 2019 at 11:46 AM Pintu Agarwal <pintu.ping@xxxxxxxxx> wrote:
> Thank you so much for your reply.
> Yes, I already checked the latest mainline kernel changes until 5.2-**.
> I see that there are many cleanup related changes, but still I see
> that suspend/resume functions are missing in dw_hdmi-imx driver.
Please see this recently submitted patch:
> So, I am trying to implement myself.
> Also, I see that suspend/resume is missing even in :
> I am trying this also (not sure if we need this as well).
> Can you point out some specific patches which can be helpful ?
> Currently, what I observed is that hdmi bind() functions are not getting called.
> Not sure who is responsible for triggering this bind function.
> Or, irq remains disabled after resume, and we need to enable it back
> again (but how ?)
> Or, we may need to enable vblank events and thus irqs can be enabled.
> So, I am exploring many possibilities.
> If you have any suggestions please let me know.
The suggestion I have is to try to use latest mainline kernel. If you
see any issues with it, please report.
The combination you mentioned in a prior thread (kernel 3.10 +
backported drm patches 4.9) is not really something the community can