Message-ID: <e4e3cdd4c2193198589ff6de05be165a8237a794.camel@intel.com>
Date:   Thu, 01 Jun 2023 17:22:15 +0300
From:   Dmitry Perchanov <dmitry.perchanov@...el.com>
To:     Sakari Ailus <sakari.ailus@...el.com>
Cc:     linux-media@...r.kernel.org, mchehab@...nel.org,
        linux-kernel@...r.kernel.org, laurent.pinchart@...asonboard.com,
        evgeni.raikhel@...el.com, demisrael@...il.com
Subject: Re: [PATCH v2] media: uapi: v4l: Intel metadata format update

Fixed in v3.

On Tue, 2023-05-16 at 11:54 +0000, Sakari Ailus wrote:
> Hi Dmitry,
> 
> On Tue, May 16, 2023 at 11:10:02AM +0300, Dmitry Perchanov wrote:
> > 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@...el.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
> > > >  ===========
> > > >  
> > > > -Intel D4xx (D435 and other) cameras include per-frame metadata in their 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 header, is
> > > >  organised in blocks. D4XX cameras implement several standard block types,
> > > > @@ -26,6 +26,8 @@ V4L2_META_FMT_UVC with the only difference, that it also 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.
> 
> The "Laser mode" below is replaced by three different fields. Was this a
> bug in the document or a change between versions 1 and 3? In the former
> case there should be another patch to fix it, in the latter both versions
> should continue to be described as they are supported.
> 
> > > > +
> > > >  Below are proprietary Microsoft style metadata types, used by D4xx cameras,
> > > >  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 corresponds to
> > > >          version xxx. The version number will be incremented when new fields 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.
> 
> Could you add to the documentation of these fields they're only valid for
> v3?
> 
> > > >  
> > > >  .. _1:
> > > >  

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