Re: [PATCH AUTOSEL 6.1 4/9] drm/amd/display: Do not set drr on pipe commit

On 5/11/23 21:39, Sasha Levin wrote:

From: Wesley Chalmers Wesley.Chalmers@amd.com

[ Upstream commit 474f01015ffdb74e01c2eb3584a2822c64e7b2be ]

[WHY] Writing to DRR registers such as OTG_V_TOTAL_MIN on the same frame as a pipe commit can cause underflow.

[HOW] Move DMUB p-state delegate into optimze_bandwidth; enabling FAMS sets optimized_required.

This change expects that Freesync requests are blocked when optimized_required is true.

This change caused a regression, see https://patchwork.freedesktop.org/patch/532240/?series=116487&rev=1#comm... / 9deeb132-a317-7419-e9da-cbc0a379c0eb@daenzer.net .