Re: [PATCH 0/2] drm: Support HDMI 2.2 FRL rates from the sink

[Harry Wentland <harry.wentland@amd.com>]

On 2026-10-28 20:44, Fangzhi Zuo wrote:
> The HDMI 2.2 spec defines three new FRL rates - 16, 20 and 24 Gbps per
> lane over 4 lanes (Max_FRL_Rate values 7, 8 and 9 in the HF-SCDB). The
> current code stops at the HDMI 2.1 ceiling of 12 Gbps per lane, so a
> sink that advertises an HDMI 2.2 rate is treated as having no FRL
> support at all and the link ends up trained far below what the sink
> actually supports.
> 
> Patch 1 teaches the DRM EDID parser to decode the three new rates.
> Patch 2 maps them back to the FRL rate index used by DC in amdgpu_dm
> and extends the KUnit coverage.
> 

Series is
Reviewed-by: Harry Wentland <harry.wentland@amd.com>

Harry

> Fangzhi Zuo (2):
>   drm/edid: Parse HDMI 2.2 FRL rates from the SCDS
>   drm/amd/display: Accept HDMI 2.2 FRL rates from the sink EDID
> 
>  .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c |  6 ++++
>  .../amdgpu_dm/tests/amdgpu_dm_helpers_test.c  | 30 +++++++++++++++++++
>  drivers/gpu/drm/drm_edid.c                    | 12 ++++++++
>  3 files changed, 48 insertions(+)
>