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Message-ID: <6de8f9611e5bcf20d7d30e6d26d78f146316b164.camel@intel.com>
Subject: Re: [PATCH v2] media: uapi: v4l: Intel metadata format update
From:   Dmitry Perchanov <dmitry.perchanov@intel.com>
To:     Sakari Ailus <sakari.ailus@intel.com>
Cc:     linux-media@vger.kernel.org, mchehab@kernel.org,
        linux-kernel@vger.kernel.org, laurent.pinchart@ideasonboard.com,
        evgeni.raikhel@intel.com, demisrael@gmail.com
Date:   Tue, 16 May 2023 11:10:02 +0300
In-Reply-To: <ZFoESmKficDbqwFv@kekkonen.localdomain>
References: <e16ddf4fdb83f30899e575b218e524f6346a9f50.camel@intel.com>
         <ZFoESmKficDbqwFv@kekkonen.localdomain>
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On Tue, 2023-05-09 at 11:28 +0300, Sakari Ailus wrote:
> Hi Dmitry,
> =

> Thanks for the patch.
> =

> No need to cc me to my @iki.fi address, I do read both. :-)
Good.
> =

> On Tue, May 09, 2023 at 11:24:53AM +0300, Dmitry Perchanov wrote:
> > Update metadata structure for Intel RealSense UVC/MIPI cameras.
> > Compliant to Intel Configuration version 3.
> > =

> > Signed-off-by: Dmitry Perchanov <dmitry.perchanov@intel.com>
> > ---
> =

> Please detail here what changed between patch versions in future versions
> of the patch.
Intel Configuration:
version 2: gpioInputData added to md_configuration (with its flag)
version 3: sub_preset_info added to md_configuration (with its flag)
> =

> >  .../media/v4l/pixfmt-meta-d4xx.rst            | 19 ++++++++++++++++---
> >  1 file changed, 16 insertions(+), 3 deletions(-)
> > =

> > diff --git a/Documentation/userspace-api/media/v4l/pixfmt-meta-d4xx.rst=
 b/Documentation/userspace-api/media/v4l/pixfmt-meta-d4xx.rst
> > index 4e437ba97a0e..b5decde640c1 100644
> > --- a/Documentation/userspace-api/media/v4l/pixfmt-meta-d4xx.rst
> > +++ b/Documentation/userspace-api/media/v4l/pixfmt-meta-d4xx.rst
> > @@ -12,7 +12,7 @@ Intel D4xx UVC Cameras Metadata
> >  Description
> >  =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> >  =

> > -Intel D4xx (D435 and other) cameras include per-frame metadata in thei=
r UVC
> > +Intel D4xx (D435, D455 and others) cameras include per-frame metadata =
in their UVC
> >  payload headers, following the Microsoft(R) UVC extension proposal [1_=
]. That
> >  means, that the private D4XX metadata, following the standard UVC head=
er, is
> >  organised in blocks. D4XX cameras implement several standard block typ=
es,
> > @@ -26,6 +26,8 @@ V4L2_META_FMT_UVC with the only difference, that it a=
lso includes proprietary
> >  payload header data. D4xx cameras use bulk transfers and only send one=
 payload
> >  per frame, therefore their headers cannot be larger than 255 bytes.
> >  =

> > +This document implements Intel Configuration version 3.
> =

> Which version was described here before this patch?
Before that patch it was "Intel Configuration version 1"
> =

> Are there devices that use that presumably different version? Or does
> this depend on e.g. firmware version?
These changes are extensions and backward compatible with old firmware.
Users are notified in case firmware too old and some features disabled.
> =

> > +
> >  Below are proprietary Microsoft style metadata types, used by D4xx cam=
eras,
> >  where all fields are in little endian order:
> >  =

> > @@ -43,7 +45,7 @@ where all fields are in little endian order:
> >      * - __u32 ID
> >        - 0x80000000
> >      * - __u32 Size
> > -      - Size in bytes (currently 56)
> > +      - Size in bytes (currently 60)
> >      * - __u32 Version
> >        - Version of this structure. The documentation herein correspond=
s to
> >          version xxx. The version number will be incremented when new f=
ields are
> > @@ -72,8 +74,11 @@ where all fields are in little endian order:
> >        - Bottom border of the AE Region of Interest
> >      * - __u32 Preset
> >        - Preset selector value, default: 0, unless changed by the user
> > -    * - __u32 Laser mode
> > +    * - __u8 Emitter mode
> >        - 0: off, 1: on
> > +    * - __u8 RFU byte
> > +    * - __u16 LED Power
> > +      - Led power value 0-360 (F416 SKU)
> >      * - :cspan:`1` *Capture Timing*
> >      * - __u32 ID
> >        - 0x80000001
> > @@ -124,6 +129,14 @@ where all fields are in little endian order:
> >        - Requested frame rate per second
> >      * - __u16 Trigger
> >        - Byte 0: bit 0: depth and RGB are synchronised, bit 1: external=
 trigger
> > +    * - __u16 Calibration count
> > +    * - __u8 GPIO input data
> > +      - GPIO readout
> > +      - Supported from FW 5.12.7.0
> > +    * - __u32 Sub-preset info
> > +      - Sub-preset choice information
> > +    * - __u8 reserved
> > +      - RFU byte.
> >  =

> >  .. _1:
> >  =


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