HDR support for Ubuntu

[Timo Aaltonen]

This is a tracker bug for getting HDR support integrated in Ubuntu.

wayland-protocols:
https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/14

Mutter:
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2356

Weston:
https://gitlab.freedesktop.org/wayland/weston/-/issues/467

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Gary Wang (gary-c-wang)]

I also put information for HDR feature in media's software stack (ffmpeg/libva/iHD driver(media-driver)/

intel's video codec with HDR is enabled in Linux media stack for transcoding, I list the code commits of media libraries related to HDR for reference,
FFmpeg
https://github.com/FFmpeg/FFmpeg/commit/38a413213216fc7add112f67e26326492c859c08
Libva
https://github.com/intel/libva/commit/cf11abe5e1b9c93ee75cf974076957162c1605b9
intel's iHD driver
https://github.com/intel/media-driver/commit/7e0ebbc794e83202808f6404f20f2a41c32a181d

[Timo Aaltonen (tjaalton)]

we have libva 2.5.0 which should contain that commit already

[Timo Aaltonen (tjaalton)]

looks like media driver is fixed as well

[Timo Aaltonen (tjaalton)]

likewise with ffmpeg

[Daniel van Vugt (vanvugt)]

Note that "HDR" and deep colour (any colour depth higher than 8-bit) are two different things.

It sounds like some of the above links refer to deep colour support and others refer to HDR. We should clarify which this bug is about (or that it really is about both disparate issues).

For regular desktop usage I think deep colour support is more important (and should come first), as first mentioned in bug 1293950.

[Gary Wang (gary-c-wang)]

Hi Timo and Daniel (@vanvugt),
Any plan for enabling HDR in part of X.org? Thanks!

Gary

[Timo Aaltonen (tjaalton)]

You mean doing upstream work to add support for it? No, I don't think so.

[Gary Wang (gary-c-wang)]

For related commits of i915's HDR support with Gemini Lake,
https://github.com/freedesktop/drm-tip/c...85b071e868
https://patchwork.freedesktop.org/series/25091/#rev15

[Timo Aaltonen (tjaalton)]

Still not upstream? We'll have kernel 5.4 in 20.04, and likely won't be backporting big patchsets like this for it. Sounds like these would have to wait for the 20.04.2 HWE update in early 2021.. (backported from 20.10)

[Daniel van Vugt (vanvugt)]

That certainly looks HDR related. But if Ubuntu is to be able to use HDR then gnome-shell/mutter first should enable use of a deep colour framebuffer. Actually, for me, that's the only part I care about :) Can anyone confirm what the minimum Intel GPU required is for 10-bpc?

[Gary Wang (gary-c-wang)]

For #15,
Sorry for causing you confusion, just put related HDR patch of Gemini Lake for your reference.

The patch for GLK were in i915 upstream.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v5.4-rc4&id=44b42ebfccfd9d6ef377a25e99ae0085b071e868

Gary

[Gary Wang (gary-c-wang)]

HDR i915 for Gfx-Gen9 in CFL/CML: Reviewing in upstream (https://patchwork.kernel.org/patch/11204583/)
[v2,0/6] Enable HDR on MCA LSPCON based Gen9 devices
[v2,1/6] drm/i915/display: Add HDR Capability detection for LSPCON
[v2,2/6] drm/i915/display: Enable HDR on gen9 devices with MCA Lspcon
[v2,3/6] drm/i915/display: Attach HDR property for capable Gen9 devices
[v2,4/6] drm/i915/display: Set HDR Infoframe for HDR capable LSPCON devices
[v2,5/6] drm/i915/display: Enable BT2020 for HDR on LSPCON devices
[v2,6/6,NOT,FOR,MERGE] drm/i915/display: Reduce blanking to support 4k60@10bpp for LSPCON

[U. Artie Eoff (uartie)]

FWIW, There is also HDR10 tone map support in gstreamer-vaapi https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/-/merge_requests/270