From: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
To: Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org>
Cc: Laurent Pinchart
<laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-fbdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Archit Taneja <archit-l0cyMroinI0@public.gmane.org>,
Darren Etheridge <detheridge-l0cyMroinI0@public.gmane.org>
Subject: Re: [PATCH 13/26] ARM: omap3.dtsi: add omapdss information
Date: Fri, 13 Dec 2013 09:10:25 -0800 [thread overview]
Message-ID: <20131213171025.GC28184@atomide.com> (raw)
In-Reply-To: <52AADEF3.9040808-l0cyMroinI0@public.gmane.org>
* Tomi Valkeinen <tomi.valkeinen-l0cyMroinI0@public.gmane.org> [131213 02:19]:
> On 2013-12-13 05:27, Laurent Pinchart wrote:
> > Hi Tony,
> >
> > On Thursday 12 December 2013 21:59:13 Tony Lindgren wrote:
> >> On Thu, Dec 12, 2013 at 10:38:34AM +0200, Tomi Valkeinen wrote:
> >>> On 2013-12-12 01:44, Laurent Pinchart wrote:
> >>>
> >>> So, are they independent? I don't know =). I think they lean on the
> >>> independent side. dss_core is always needed for the submodules to work,
> >>> but for example DSI could be used without DISPC, using system DMA to
> >>> transfer data from memory to DSI. Not a very useful thing to do, but
> >>> still, there are dedicated DMA channels for that.
> >>
> >> If they have separate hwmod entries, they should be considered separate
> >> independent devices for sure.
> >>
> >> To summarize, here are few reasons why they need to be treated as
> >> separate devices:
> >
> > Are you talking generally here, or about the DSS modules in particular ?
> >
> >> 1. The modules maybe clocked/powered/idled separately and can have their
> >> own idle configuration so they can do the hardware based idling
> >> separately.
> >
> > I don't think this applies to the DSS modules.
>
> The DSS submodules have their own SYSCONFIG register, and idle settings
> can be set per module. So I think they idle separately, even if they are
> in a common power domain.
Yes. Please see the current omap_hwmod_*_data.c files, if they are separate
entries there, that means we need to treat them as separate devices to
avoid the issues I listed.
We do have some entries still missing from omap_hwmod_*_data.c files, like
the SSI entries as they are undocumented. But for the existing ones there
please follow the same layout for the .dts entries.
Regards,
Tony
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next prev parent reply other threads:[~2013-12-13 17:10 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-04 12:28 [PATCH 00/26] OMAPDSS: DT support (Christmas edition) Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 01/26] OMAPDSS: rename display-sysfs 'name' entry Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 02/26] OMAPDSS: DSI: fix fifosize Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 03/26] ARM: OMAP: remove DSS DT hack Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 04/26] OMAPDSS: remove DT hacks for regulators Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 05/26] ARM: OMAP2+: add omapdss_init_of() Tomi Valkeinen
2013-12-11 23:10 ` Laurent Pinchart
2013-12-12 7:30 ` Tomi Valkeinen
2013-12-13 8:32 ` Archit Taneja
2013-12-13 8:40 ` Tomi Valkeinen
2013-12-13 17:07 ` Tony Lindgren
2013-12-04 12:28 ` [PATCH 06/26] OMAPDSS: if dssdev->name==NULL, use alias Tomi Valkeinen
2013-12-11 23:13 ` Laurent Pinchart
2013-12-11 23:56 ` Laurent Pinchart
2013-12-12 7:41 ` Tomi Valkeinen
[not found] ` <52A968BD.20304-l0cyMroinI0@public.gmane.org>
2013-12-12 10:05 ` Sebastian Reichel
2013-12-12 13:22 ` Laurent Pinchart
2013-12-12 14:13 ` Tomi Valkeinen
2013-12-12 14:15 ` Laurent Pinchart
2013-12-12 14:19 ` Tomi Valkeinen
2013-12-12 17:31 ` Sebastian Reichel
2013-12-13 12:01 ` Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 07/26] OMAPDSS: get dssdev->alias from DT alias Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 08/26] OMAPFB: clean up default display search Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 09/26] OMAPFB: search for default display with DT alias Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 10/26] OMAPDSS: add of helpers Tomi Valkeinen
2013-12-11 23:19 ` Laurent Pinchart
2013-12-12 7:48 ` Tomi Valkeinen
2013-12-13 2:37 ` Laurent Pinchart
2013-12-04 12:28 ` [PATCH 11/26] OMAPDSS: Add DT support to DSS, DISPC, DPI, HDMI, VENC Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 12/26] OMAPDSS: Add DT support to DSI Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 13/26] ARM: omap3.dtsi: add omapdss information Tomi Valkeinen
2013-12-05 17:05 ` Tony Lindgren
2013-12-09 12:45 ` Tomi Valkeinen
2013-12-09 18:04 ` Tony Lindgren
2013-12-11 23:44 ` Laurent Pinchart
2013-12-12 8:38 ` Tomi Valkeinen
2013-12-12 21:59 ` Tony Lindgren
2013-12-13 3:27 ` Laurent Pinchart
2013-12-13 10:18 ` Tomi Valkeinen
[not found] ` <52AADEF3.9040808-l0cyMroinI0@public.gmane.org>
2013-12-13 17:10 ` Tony Lindgren [this message]
2013-12-13 3:24 ` Laurent Pinchart
2013-12-13 9:29 ` Tomi Valkeinen
2013-12-16 10:49 ` Tomi Valkeinen
[not found] ` <52AEDA9F.2020609-l0cyMroinI0@public.gmane.org>
2013-12-16 13:55 ` Laurent Pinchart
2013-12-04 12:28 ` [PATCH 14/26] ARM: omap4.dtsi: " Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 15/26] ARM: omap4-panda.dts: add display information Tomi Valkeinen
2013-12-06 8:57 ` Javier Martinez Canillas
2013-12-09 12:56 ` Tomi Valkeinen
2013-12-09 15:09 ` Javier Martinez Canillas
2013-12-09 15:30 ` Tomi Valkeinen
2013-12-09 16:53 ` Javier Martinez Canillas
2013-12-10 10:56 ` Enric Balletbo Serra
2013-12-10 12:10 ` Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 16/26] ARM: omap4-sdp.dts: " Tomi Valkeinen
2013-12-13 9:27 ` Archit Taneja
2013-12-13 9:39 ` Tomi Valkeinen
2013-12-13 9:58 ` Archit Taneja
2013-12-13 10:15 ` Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 17/26] ARM: omap3-tobi.dts: add lcd (TEST) Tomi Valkeinen
2013-12-06 10:18 ` Florian Vaussard
2013-12-10 12:18 ` Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 18/26] ARM: omap3-beagle.dts: add display information Tomi Valkeinen
2013-12-06 8:41 ` Javier Martinez Canillas
2013-12-09 12:06 ` Tomi Valkeinen
2013-12-09 12:16 ` Javier Martinez Canillas
2013-12-04 12:28 ` [PATCH 19/26] ARM: omap3-beagle-xm.dts: " Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 20/26] OMAPDSS: panel-dsi-cm: Add DT support Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 21/26] OMAPDSS: encoder-tfp410: " Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 22/26] OMAPDSS: connector-dvi: " Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 23/26] OMAPDSS: encoder-tpd12s015: " Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 24/26] OMAPDSS: hdmi-connector: " Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 25/26] OMAPDSS: panel-dpi: " Tomi Valkeinen
2013-12-04 12:28 ` [PATCH 26/26] OMAPDSS: connector-analog-tv: " Tomi Valkeinen
[not found] ` <1386160133-24026-1-git-send-email-tomi.valkeinen-l0cyMroinI0@public.gmane.org>
2013-12-04 16:01 ` [PATCH 00/26] OMAPDSS: DT support (Christmas edition) Sebastian Reichel
2013-12-05 9:41 ` Tomi Valkeinen
2013-12-12 0:39 ` Laurent Pinchart
2013-12-12 8:54 ` Tomi Valkeinen
2013-12-13 3:45 ` Laurent Pinchart
2013-12-13 8:16 ` Geert Uytterhoeven
2013-12-13 10:05 ` Tomi Valkeinen
2013-12-13 14:37 ` Laurent Pinchart
2013-12-13 15:47 ` Tomi Valkeinen
2013-12-13 17:22 ` Tony Lindgren
2013-12-14 7:34 ` Tomi Valkeinen
2013-12-14 14:09 ` Tony Lindgren
2013-12-16 7:24 ` Tomi Valkeinen
2013-12-18 0:30 ` Tony Lindgren
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