From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Eugeniu Rosca <erosca@de.adit-jv.com>
Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
Simon Horman <horms@verge.net.au>,
Ulrich Hecht <uli+renesas@fpond.eu>,
VenkataRajesh.Kalakodima@in.bosch.com,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Koji Matsuoka <koji.matsuoka.xm@renesas.com>,
muroya@ksk.co.jp, Harsha.ManjulaMallikarjun@in.bosch.com,
Ezequiel Garcia <ezequiel@collabora.com>,
Sean Paul <seanpaul@chromium.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
DRI Development <dri-devel@lists.freedesktop.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Michael Dege <michael.dege@renesas.com>,
gotthard.voellmeke@renesas.com, efriedrich@de.adit-jv.com,
Michael Rodin <mrodin@de.adit-jv.com>,
ChaitanyaKumar.Borah@in.bosch.com,
Eugeniu Rosca <roscaeugeniu@gmail.com>
Subject: Re: [PATCH v5 0/8] drm: rcar-du: Add Color Management Module (CMM)
Date: Wed, 27 May 2020 09:34:30 +0200 [thread overview]
Message-ID: <CAMuHMdVGcFGL6V6_zDCPQA66VFyqM9bQ6choWs8eYfOieFu1ZQ@mail.gmail.com> (raw)
In-Reply-To: <20200527071555.GA23912@lxhi-065.adit-jv.com>
Hi Eugeniu,
On Wed, May 27, 2020 at 9:16 AM Eugeniu Rosca <erosca@de.adit-jv.com> wrote:
> On Tue, Oct 15, 2019 at 12:46:13PM +0200, Jacopo Mondi wrote:
> > CMM functionalities are retained between suspend/resume cycles (tested with
> > suspend-to-idle) without requiring a re-programming of the LUT tables.
>
> Hmm. Is this backed up by any statement in the HW User's manual?
> This comes in contrast with the original Renesas CMM implementation [**]
> which does make use of suspend (where the freeze actually happens).
>
> Can we infer, based on your statement, that we could also get rid of
> the suspend callback in [**]?
While the CMM state will be retained across suspend-to-idle, I'm quite
sure it will be lost by suspend-to-RAM, at least on the Salvator-X(S),
ULCB, and Ebisu development boards, as PSCI will ask the BD9571WMV
regulator to power down the R-Car SoC.
So IMHO we do need suspend/resume handling.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
next prev parent reply other threads:[~2020-05-27 7:34 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-15 10:46 [PATCH v5 0/8] drm: rcar-du: Add Color Management Module (CMM) Jacopo Mondi
2019-10-15 10:46 ` [PATCH v5 1/8] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation Jacopo Mondi
2019-10-15 11:38 ` Kieran Bingham
2019-10-15 14:03 ` Geert Uytterhoeven
2019-10-15 10:46 ` [PATCH v5 2/8] dt-bindings: display, renesas,du: Document cmms property Jacopo Mondi
2019-10-15 10:46 ` [PATCH v5 3/8] drm: rcar-du: Add support for CMM Jacopo Mondi
2019-10-15 11:53 ` Kieran Bingham
2019-10-15 13:17 ` Kieran Bingham
2019-10-15 13:33 ` Jacopo Mondi
2019-10-15 14:26 ` Kieran Bingham
2019-10-15 17:25 ` Laurent Pinchart
2019-10-15 10:46 ` [PATCH v5 4/8] drm: rcar-du: kms: Initialize CMM instances Jacopo Mondi
2019-10-15 10:46 ` [PATCH v5 5/8] drm: rcar-du: crtc: Control CMM operations Jacopo Mondi
2019-10-15 13:15 ` Kieran Bingham
2019-10-15 13:37 ` Jacopo Mondi
2019-10-15 17:54 ` Laurent Pinchart
2019-10-15 19:17 ` Jacopo Mondi
2019-10-15 19:53 ` Laurent Pinchart
2019-10-15 10:46 ` [PATCH v5 6/8] drm: rcar-du: crtc: Register GAMMA_LUT properties Jacopo Mondi
2019-10-15 10:46 ` [PATCH v5 7/8] arm64: dts: renesas: Add CMM units to Gen3 SoCs Jacopo Mondi
2019-10-15 12:52 ` Kieran Bingham
2019-10-15 18:06 ` Laurent Pinchart
2019-10-15 10:46 ` [PATCH v5 8/8] drm: rcar-du: kms: Expand comment in vsps parsing routine Jacopo Mondi
2019-10-15 13:04 ` Kieran Bingham
2019-10-15 16:54 ` [PATCH v5 0/8] drm: rcar-du: Add Color Management Module (CMM) Laurent Pinchart
2019-11-11 11:21 ` Kalakodima Venkata Rajesh (RBEI/ECF3)
2019-11-11 13:06 ` Jacopo Mondi
2020-05-27 7:15 ` Eugeniu Rosca
2020-05-27 7:34 ` Geert Uytterhoeven [this message]
2020-05-27 7:40 ` Gotthard Voellmeke
2020-05-27 7:44 ` Eugeniu Rosca
2020-06-05 13:29 ` Jacopo Mondi
2020-06-05 13:41 ` Eugeniu Rosca
2020-06-05 13:53 ` Jacopo Mondi
2020-06-07 2:41 ` Laurent Pinchart
2020-06-08 9:44 ` Eugeniu Rosca
2020-06-12 15:12 ` Jacopo Mondi
2020-06-15 14:17 ` Eugeniu Rosca
2020-07-17 15:06 ` Jacopo Mondi
2020-06-09 14:29 ` Eugeniu Rosca
2020-06-12 15:00 ` Jacopo Mondi
2020-06-12 15:10 ` Laurent Pinchart
2020-06-12 15:36 ` Eugeniu Rosca
2020-06-12 15:50 ` Laurent Pinchart
2020-08-18 9:50 ` Geert Uytterhoeven
2020-06-05 19:05 ` Laurent Pinchart
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