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From: Fabio Estevam <festevam@gmail.com>
To: Pintu Agarwal <pintu.ping@gmail.com>
Cc: linux-pm@vger.kernel.org,
	open list <linux-kernel@vger.kernel.org>,
	"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
	<linux-arm-kernel@lists.infradead.org>,
	Kernelnewbies <kernelnewbies@kernelnewbies.org>
Subject: Re: [IMX] [DRM]: suspend/resume support
Date: Tue, 18 Jun 2019 12:09:23 -0300
Message-ID: <CAOMZO5BY8JcLNMCRCC_d=emy8HR6kE=dB9f5qfZ=ci_c+Jak0w@mail.gmail.com> (raw)
In-Reply-To: <CAOuPNLgEEfDca4aeT1+q8GfUfGzbJ4x6JwGf-ROB1pgpXUBHSw@mail.gmail.com>

On Tue, Jun 18, 2019 at 11:46 AM Pintu Agarwal <pintu.ping@gmail.com> 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:
https://lore.kernel.org/patchwork/patch/1084057/

> So, I am trying to implement myself.
> Also, I see that suspend/resume is missing even in :
> drivers/gpu/drm/imx/ipuv3-crtc.c
> 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
help you.

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  reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-17 13:49 Pintu Agarwal
2019-06-18  7:01 ` Oliver Neukum
2019-06-18 14:02 ` Fabio Estevam
2019-06-18 14:45   ` Pintu Agarwal
2019-06-18 15:09     ` Fabio Estevam [this message]
2019-06-19 13:33       ` Pintu Agarwal
2019-06-19 13:44         ` Fabio Estevam
2019-06-19 15:04           ` Pintu Agarwal
2019-06-19 15:11             ` Fabio Estevam
2019-06-19 15:29               ` Pintu Agarwal
2019-06-21 15:12                 ` Pintu Agarwal
2019-06-21 15:40                   ` Fabio Estevam
2019-06-22  8:13                     ` Pintu Agarwal
2019-07-01 14:25                       ` Pintu Agarwal
2019-07-11 15:29                         ` [IMX] [DRM]: help in analyzing clock_summary rate difference Pintu Agarwal
2019-06-19 15:04         ` [IMX] [DRM]: suspend/resume support Greg KH
2019-06-19 15:17           ` Pintu Agarwal
2019-06-19 16:26             ` Valdis Klētnieks
2019-06-21 15:04               ` Pintu Agarwal

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