On Tue, 2026-01-13 at 22:41 +0100, Tomasz Pakuła wrote:
> Adaptive Sync over PCON is only available as FreeSync over HDMI. TVs which do
> not support FreeSync, do not have working VRR with DP -> HDMI 2.1 adapters even
> though adapters will take care of HDMI VRR info packets.
>
> Since HDMI VRR relies on FRL modes, this will only be enabled for PCONs in the
> VRR whitelist. HDMI VRR for native HDMI connector will still not be
> possible/attempted.
>
> I myself validated these changes with my Samsung S95B + Bernhard validated on
> LG C4 + FreeSync-less Sony Bravia 8. I used Alienware AW3423DWF that only
> has HDMI 2.0 to check that FreeSync still triggers properly for "older" hardware
>
> For missing VRRmax or VRRmax == 0, the upper boundary is the currently selected
> video mode refresh rate. I wasn't sure how best to implement it but 10000
> works since the driver already limits VRR range to the currently selected
> video mode and 10000 Hz should be good enough for years to come.
>
> Changes in v2:
> - More info parsed from HDMI Forum vsdb
> - EDID parsing squashed into one commit
> - Support for VRRmax == 0
>
> Tomasz Pakuła (3):
> drm/edid: parse more info from HDMI Forum vsdb
> drm/amd/display: rename PCON adaptive sync types
> drm/amd/display: enable HDMI VRR over PCON
>
> .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 27 +++++++++--
> .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 2 +-
> .../amd/display/modules/inc/mod_info_packet.h | 4 +-
> .../display/modules/info_packet/info_packet.c | 4 +-
> drivers/gpu/drm/drm_edid.c | 41 +++++++++++++++-
> include/drm/drm_connector.h | 47 +++++++++++++++++++
> 6 files changed, 114 insertions(+), 11 deletions(-)
I'd like to inform you that this patch series will be superseded by
another, bigger patch series which compiles my recent work as all the
separate series/patches di conflict with each other.
Thank you.
Tomasz