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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aXUQKSJGkz7nzHJ4@hal-station.localdomain>
Date: Sat, 24 Jan 2026 13:32:09 -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()

On Fri, Jan 23, 2026 at 04:30:12PM -0600, Mario Limonciello wrote:
> Hamza - since you seem to have a "workload" that can run overnight and this
> series recovers, can you try what Alex said and do a dc_suspend() and
> dc_resume() for failure?
> 
> Make sure you log a message so you can know it worked.

Sure, I'll try something along the lines of:

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
index 492457c86393..bc7abd00f5f4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
@@ -579,11 +579,28 @@ amdgpu_dm_atomic_crtc_get_property(struct drm_crtc *crtc,
 }
 #endif

-static void amdgpu_dm_crtc_handle_timeout(struct drm_crtc *crtc)
+static void amdgpu_dm_crtc_handle_timeout(struct drm_crtc *crtc,
+					  struct drm_crtc_commit *commit)
 {
 	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
 	struct amdgpu_reset_context reset_ctx;
+	struct amdgpu_ip_block *ip_block;

+	ip_block = amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_DCE);
+	if (!ip_block)
+		goto full_reset;
+
+	ip_block->version->funcs->suspend(ip_block);
+	ip_block->version->funcs->resume(ip_block);
+
+	if (drm_crtc_commit_wait(commit)) {
+		drm_err(crtc->dev, "suspend-resume failed!\n");
+		goto full_reset;
+	}
+
+	return;
+
+full_reset:
 	if (amdgpu_device_should_recover_gpu(adev)) {
 		memset(&reset_ctx, 0, sizeof(reset_ctx));

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 7175294ccb57..b38c4ee2fc95 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1961,7 +1961,7 @@ void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
 				crtc->base.id, crtc->name);

 			if (crtc->funcs->page_flip_timeout)
-				crtc->funcs->page_flip_timeout(crtc);
+				crtc->funcs->page_flip_timeout(crtc, commit);
 		}
 	}

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 45dc5a76e915..47a34a05f6de 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -616,7 +616,8 @@ struct drm_crtc_funcs {
 	 * and can be used by drivers to attempt to recover from a page flip
 	 * timeout.
 	 */
-	void (*page_flip_timeout)(struct drm_crtc *crtc);
+	void (*page_flip_timeout)(struct drm_crtc *crtc,
+				  struct drm_crtc_commit *commit);

 	/**
 	 * @set_property: