From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Kalakodima Venkata Rajesh (RBEI/ECF3)"
        <VenkataRajesh.Kalakodima@in.bosch.com>
Subject: RE: [PATCH v5 0/8] drm: rcar-du: Add Color Management Module (CMM)
Date: Mon, 11 Nov 2019 11:21:28 +0000
Message-ID: <e731216a728c4035af88c92b70756197@in.bosch.com>
References: <20191015104621.62514-1-jacopo+renesas@jmondi.org>
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To: Jacopo Mondi <jacopo+renesas@jmondi.org>, "laurent.pinchart@ideasonboard.com" <laurent.pinchart@ideasonboard.com>, "kieran.bingham+renesas@ideasonboard.com" <kieran.bingham+renesas@ideasonboard.com>, "geert@linux-m68k.org" <geert@linux-m68k.org>, "horms@verge.net.au" <horms@verge.net.au>, "uli+renesas@fpond.eu" <uli+renesas@fpond.eu>
Cc: "airlied@linux.ie" <airlied@linux.ie>, "daniel@ffwll.ch" <daniel@ffwll.ch>, "koji.matsuoka.xm@renesas.com" <koji.matsuoka.xm@renesas.com>, "muroya@ksk.co.jp" <muroya@ksk.co.jp>, "Harsha Manjula Mallikarjun (RBEI/ECF3)" <Harsha.ManjulaMallikarjun@in.bosch.com>, "ezequiel@collabora.com" <ezequiel@collabora.com>, "seanpaul@chromium.org" <seanpaul@chromium.org>, "linux-renesas-soc@vger.kernel.org" <linux-renesas-soc@vger.kernel.org>, "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
List-Id: dri-devel@lists.freedesktop.org

Hi Jacopo,

Please find comments below.

Best regards,

Rajesh Kv
RBEI/ECF3 =20

> -----Original Message-----
> From: linux-kernel-owner@vger.kernel.org <linux-kernel-
> owner@vger.kernel.org> On Behalf Of Jacopo Mondi
> Sent: Tuesday, October 15, 2019 4:16 PM
> To: laurent.pinchart@ideasonboard.com;
> kieran.bingham+renesas@ideasonboard.com; geert@linux-m68k.org;
> horms@verge.net.au; uli+renesas@fpond.eu; Kalakodima Venkata Rajesh
> (RBEI/ECF3) <VenkataRajesh.Kalakodima@in.bosch.com>
> Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>; airlied@linux.ie;
> daniel@ffwll.ch; koji.matsuoka.xm@renesas.com; muroya@ksk.co.jp; Harsha
> Manjula Mallikarjun (RBEI/ECF3) <Harsha.ManjulaMallikarjun@in.bosch.com>;
> ezequiel@collabora.com; seanpaul@chromium.org; linux-renesas-
> soc@vger.kernel.org; dri-devel@lists.freedesktop.org; linux-
> kernel@vger.kernel.org
> Subject: [PATCH v5 0/8] drm: rcar-du: Add Color Management Module (CMM)
>=20
> References:
> A reference to the v1 cover letter, with some background on the CMM is
> available here:
> https://lkml.org/lkml/2019/6/6/583
> v2:
> https://lore.kernel.org/linux-renesas-soc/20190706140746.29132-10-
> jacopo+renesas@jmondi.org/
> v3:
> https://lore.kernel.org/linux-renesas-soc/20190825135154.11488-1-
> jacopo+renesas@jmondi.org/
> v4:
> https://lore.kernel.org/linux-renesas-soc/20190906135436.10622-1-
> jacopo+renesas@jmondi.org/
>=20
> Again, quite a consistent changelog, mostly due to the developments happe=
ned
> on Ezequiel's VOP unit following Sean's advices.
>=20
> I here implemented the same, and moved the CMM handling to the crtc being
> and enable callbacks. As a result the overall implementation results quit=
e a lot
> simplified, mostly on the CMM driver side.
>=20
> I have dropped tags and acks on the CMM driver and CMM enablement patches
> in DU crtc driver because of the number of changes.
>=20
> A more detailed change log:
>=20
> - Rebased on renesas-devel-2019-10-07-v5.4-rc4
>=20
> * Bindings/DT
> - Included Rob's comments on the yaml file license and the use of 'OneOf'
>   in the compatible property description
> - Use the bracketed style suggested by Kieran for the 'renesas,cmm' prope=
rty
>   introduced in patch 2
> - Re-order the properties in the SoC DTS files as suggested by Kieran
>=20
> * CMM/DU
> - As anticipated, moved CMM management to the crtc from the atomic commit
> tail
>   helper where it was implemented in v4
>   This allow to correctly support resume/suspend and proper ordering of t=
he
> CMM
>   enable and setup operations (enable -before- setup)
> - As a consequence the CMM driver is greatly simplified by removing the n=
eed
>   to cache the LUT table entries provided to cmm_setup() and later re-app=
ly
>   them at enable time.
> - Better support handling of disabled CMM config option by returning -ENO=
DEV
>   at cmm_init() time as suggested by Kieran.
>=20
> * Testing
> I have tested by injecting a color inversion LUT table and enabling/disab=
ling it
> every 50 displayed frames:
> https://jmondi.org/cgit/kmsxx/log/?h=3Dgamma_lut
>=20
> CMM functionalities are retained between suspend/resume cycles (tested wi=
th
> suspend-to-idle) without requiring a re-programming of the LUT tables.
>=20
> Testing with real world use cases might be beneficial. Rajesh are you sti=
ll
> interested in giving this series a spin

I have tested version v3 of CMM module with a demo application based on lib=
drm=20
library. I could successfully test setting of Gamma LUT.

Next step is to test on full featured graphics stack i.e. involving Weston =
and OpenGL.
Weston can set Gamma. I have to stop this work for a while due to other hig=
h prio activities.
I plan to resume soon.

>=20
> Laurent, Kieran, could we fast-track review of this and hopefully try to =
have it
> merged for v5.5 ?
>=20
> Thanks Ezequiel for having suggested me this solution.
>=20
> Thanks
>    j
>=20
> Jacopo Mondi (8):
>   dt-bindings: display: renesas,cmm: Add R-Car CMM documentation
>   dt-bindings: display, renesas,du: Document cmms property
>   drm: rcar-du: Add support for CMM
>   drm: rcar-du: kms: Initialize CMM instances
>   drm: rcar-du: crtc: Control CMM operations
>   drm: rcar-du: crtc: Register GAMMA_LUT properties
>   arm64: dts: renesas: Add CMM units to Gen3 SoCs
>   drm: rcar-du: kms: Expand comment in vsps parsing routine
>=20
>  .../bindings/display/renesas,cmm.yaml         |  67 ++++++
>  .../bindings/display/renesas,du.txt           |   5 +
>  arch/arm64/boot/dts/renesas/r8a7795.dtsi      |  39 ++++
>  arch/arm64/boot/dts/renesas/r8a7796.dtsi      |  31 ++-
>  arch/arm64/boot/dts/renesas/r8a77965.dtsi     |  31 ++-
>  arch/arm64/boot/dts/renesas/r8a77990.dtsi     |  21 ++
>  arch/arm64/boot/dts/renesas/r8a77995.dtsi     |  21 ++
>  drivers/gpu/drm/rcar-du/Kconfig               |   7 +
>  drivers/gpu/drm/rcar-du/Makefile              |   1 +
>  drivers/gpu/drm/rcar-du/rcar_cmm.c            | 198 ++++++++++++++++++
>  drivers/gpu/drm/rcar-du/rcar_cmm.h            |  60 ++++++
>  drivers/gpu/drm/rcar-du/rcar_du_crtc.c        |  89 ++++++++
>  drivers/gpu/drm/rcar-du/rcar_du_crtc.h        |   2 +
>  drivers/gpu/drm/rcar-du/rcar_du_drv.h         |   2 +
>  drivers/gpu/drm/rcar-du/rcar_du_group.c       |   5 +
>  drivers/gpu/drm/rcar-du/rcar_du_group.h       |   2 +
>  drivers/gpu/drm/rcar-du/rcar_du_kms.c         |  82 +++++++-
>  drivers/gpu/drm/rcar-du/rcar_du_regs.h        |   5 +
>  18 files changed, 665 insertions(+), 3 deletions(-)  create mode 100644
> Documentation/devicetree/bindings/display/renesas,cmm.yaml
>  create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.c
>  create mode 100644 drivers/gpu/drm/rcar-du/rcar_cmm.h
>=20
> --
> 2.23.0

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From: "Kalakodima Venkata Rajesh (RBEI/ECF3)"
 <VenkataRajesh.Kalakodima@in.bosch.com>
To: Jacopo Mondi <jacopo+renesas@jmondi.org>,
 "laurent.pinchart@ideasonboard.com" <laurent.pinchart@ideasonboard.com>,
 "kieran.bingham+renesas@ideasonboard.com"
 <kieran.bingham+renesas@ideasonboard.com>, "geert@linux-m68k.org"
 <geert@linux-m68k.org>, "horms@verge.net.au" <horms@verge.net.au>,
 "uli+renesas@fpond.eu" <uli+renesas@fpond.eu>
Subject: RE: [PATCH v5 0/8] drm: rcar-du: Add Color Management Module (CMM)
Thread-Topic: [PATCH v5 0/8] drm: rcar-du: Add Color Management Module (CMM)
Thread-Index: AQHVg0WU8sl/jGtffUuJZcUH6VN3CqeFyP4w
Date: Mon, 11 Nov 2019 11:21:28 +0000
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References: <20191015104621.62514-1-jacopo+renesas@jmondi.org>
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