ACK: [PATCH 0/1][SRU][N] Navi24 RX6300 light up issue on 6.8 kernel

[Jian Hui Lee]

Acked-by: Jian Hui Lee <jianhui.lee at canonical.com>

On Thu, Oct 24, 2024 at 1:28 PM AceLan Kao <acelan.kao at canonical.com> wrote:
>
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
>
> BugLink: https://bugs.launchpad.net/bugs/2084513
>
> [Impact]
> Navi24 (specific customer SKU of RX6300) had problems with lighting up
> display on 6.8 kernel.
>
> [Fix]
> Mario at AMD looked at issue and it is caused by this commit in 6.8-rc1:
>
> e57cd73f971194e94bc42d57b9fcb184c93a8754 drm/amd/display: Optimize fast validation cases
>
> It has been fixed by this commit in 6.9-rc1:
>
> f0ec30549a2b ("drm/amd/display: Ensure populate uclk in bb construction")
>
> [Test]
> Boot up the machine with AMD RX6300 gfx, it should display well.
>
> [Where problems could occur]
> The patch modifies how optimal DCFCLK (display controller fabric clock)
> and UCLK (memory clock) values are calculated and paired. This could
> potentially lead to suboptimal clock settings in some scenarios, especially
> for low bandwidth cases. The comment mentions this is specifically needed
> for DCN303 due to low memory bandwidth, but it may have unintended
> consequences for other configurations.
>
> Alvin Lee (1):
>   drm/amd/display: Ensure populate uclk in bb construction
>
>  .../display/dc/dml/dcn30/display_mode_vba_30.c   | 16 ++++++++--------
>  .../drm/amd/display/dc/dml/dcn303/dcn303_fpu.c   | 11 +++++++++++
>  .../display/dc/resource/dcn30/dcn30_resource.c   | 11 +++++++++++
>  3 files changed, 30 insertions(+), 8 deletions(-)
>
> --
> 2.43.0
>
>
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