linux-kernel - [PATCH v2 2/2] drm/amdgpu: implement page_flip

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Message-ID: <20260206235846.1019172-2-someguy@effective-light.com>
Date: Fri,  6 Feb 2026 18:58:43 -0500
From: Hamza Mahfooz <someguy@...ective-light.com>
To: dri-devel@...ts.freedesktop.org
Cc: Timur Kristóf <timur.kristof@...il.com>,
	Michel Dänzer <michel.daenzer@...lbox.org>,
	Xaver Hugl <xaver.hugl@....org>,
	Hamza Mahfooz <someguy@...ective-light.com>,
	Harry Wentland <harry.wentland@....com>,
	Leo Li <sunpeng.li@....com>,
	Rodrigo Siqueira <siqueira@...lia.com>,
	Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	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: [PATCH v2 2/2] drm/amdgpu: implement page_flip_timeout() support

We now have a means to respond to page flip timeouts. So, hook up
support for the new page_flip_timeout() callback.

Signed-off-by: Hamza Mahfooz <someguy@...ective-light.com>
---
v2: send a wedged event instead of attempting a GPU reset.
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

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 697e232acebf..1faf39b7a1b4 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
@@ -23,6 +23,7 @@
  * Authors: AMD
  *
  */
+#include <drm/drm_drv.h>
 #include <drm/drm_vblank.h>
 #include <drm/drm_atomic_helper.h>
 
@@ -578,12 +579,19 @@ amdgpu_dm_atomic_crtc_get_property(struct drm_crtc *crtc,
 }
 #endif
 
+static void amdgpu_dm_crtc_handle_timeout(struct drm_crtc *crtc)
+{
+	drm_dev_wedged_event(crtc->dev, DRM_WEDGE_RECOVERY_REBIND |
+			     DRM_WEDGE_RECOVERY_BUS_RESET, NULL);
+}
+
 /* Implemented only the options currently available for the driver */
 static const struct drm_crtc_funcs amdgpu_dm_crtc_funcs = {
 	.reset = amdgpu_dm_crtc_reset_state,
 	.destroy = amdgpu_dm_crtc_destroy,
 	.set_config = drm_atomic_helper_set_config,
 	.page_flip = drm_atomic_helper_page_flip,
+	.page_flip_timeout = amdgpu_dm_crtc_handle_timeout,
 	.atomic_duplicate_state = amdgpu_dm_crtc_duplicate_state,
 	.atomic_destroy_state = amdgpu_dm_crtc_destroy_state,
 	.set_crc_source = amdgpu_dm_crtc_set_crc_source,
-- 
2.52.0