HDR support for Ubuntu

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

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

we have libva 2.5.0 which should contain that commit already

looks like media driver is fixed as well

likewise with ffmpeg

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.

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

Gary

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

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

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)

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?

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

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

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