Kernel Newbies archive on
 help / color / Atom feed
From: Pintu Agarwal <>
To: open list <>,,
	 Kernelnewbies <>,
Subject: [IMX] [DRM]: suspend/resume support
Date: Mon, 17 Jun 2019 19:19:27 +0530
Message-ID: <> (raw)

Hi All,

I am trying to implement suspend/resume functionality to to imx-hdmi driver:

So, I need some help about this.
I logged the request in imx community, but it seems they are not responding.
Firstly I expect nxp community members to support (if anybody here).
Otherwise, I guess, people who are experts here and have prior
experience in implementing suspend/resume for their drivers, should be
able to give me some guidance.

Currently, I am trying to understand what needs to be taken care
during suspend/resume.
With some reference, I figured out that hdmi power off/on needs to be
done during suspend/resume.
But after resume, system is hanging.
It seems like vblank events are not getting triggered after the resume.
May be irq remains disabled after resume, I need to figure out some
way to enable the all the irqs again.

Even if I try to install hdmi driver as a dynamic loadable module,
still I get the same issue.

So, I wonder, what is the right way to handle suspend/resume for any driver.
Some clue/reference should help me to keep going...


Kernelnewbies mailing list

             reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-17 13:49 Pintu Agarwal [this message]
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
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

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Kernel Newbies archive on

Archives are clonable:
	git clone --mirror kernelnewbies/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kernelnewbies kernelnewbies/ \
	public-inbox-index kernelnewbies

Example config snippet for mirrors

Newsgroup available over NNTP:

AGPL code for this site: git clone public-inbox