linux-kernel - Re: [PATCH 1/2] drm: introduce page_flip

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Message-ID: <aXk_2HGdrf_2yPPm@hal-station>
Date: Tue, 27 Jan 2026 17:44:40 -0500
From: Hamza Mahfooz <someguy@...ective-light.com>
To: Mario Limonciello <mario.limonciello@....com>
Cc: Timur Kristóf <timur.kristof@...il.com>,
	dri-devel@...ts.freedesktop.org,
	Christian König <christian.koenig@....com>,
	Alex Deucher <alexander.deucher@....com>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Harry Wentland <harry.wentland@....com>,
	Leo Li <sunpeng.li@....com>, Rodrigo Siqueira <siqueira@...lia.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Sunil Khatri <sunil.khatri@....com>, Ce Sun <cesun102@....com>,
	Lijo Lazar <lijo.lazar@....com>,
	Kenneth Feng <kenneth.feng@....com>,
	Ivan Lipski <ivan.lipski@....com>, Alex Hung <alex.hung@....com>,
	Tom Chung <chiahsuan.chung@....com>, Melissa Wen <mwen@...lia.com>,
	Michel Dänzer <mdaenzer@...hat.com>,
	Fangzhi Zuo <Jerry.Zuo@....com>, amd-gfx@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drm: introduce page_flip_timeout()

The normal suspend-resume path doesn't seem to be enough (I end up
hitting [0] and [1] actually). However, if I force it to take the reset
path (using
amdgpu_device_lock_reset_domain()/amdgpu_device_unlock_reset_domain()),
that does seem to do the trick.

[0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c?h=v6.19-rc7#n3161
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c?h=v6.19-rc7#n3171