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| author | Jocelyn Falempe <jfalempe@redhat.com> | 2024-04-09 18:30:43 +0200 |
|---|---|---|
| committer | Jocelyn Falempe <jfalempe@redhat.com> | 2024-04-15 16:13:15 +0200 |
| commit | 813ca3aa8fecaca9cf81f831d2e036d997ac3ee7 (patch) | |
| tree | b7b4e2d94a0d640c665cc521946ba29ebfd89bb6 /drivers/gpu/drm/Kconfig | |
| parent | 9544309775c334c9cc5f7d88be3daccc846199d1 (diff) | |
| download | linux-813ca3aa8fecaca9cf81f831d2e036d997ac3ee7.tar.gz linux-813ca3aa8fecaca9cf81f831d2e036d997ac3ee7.tar.bz2 linux-813ca3aa8fecaca9cf81f831d2e036d997ac3ee7.zip | |
drm/panic: Add debugfs entry to test without triggering panic.
Add a debugfs file, so you can test drm_panic without freezing
your machine. This is unsafe, and should be enabled only for
developer or tester.
To display the drm_panic screen on the device 0:
echo 1 > /sys/kernel/debug/dri/0/drm_panic_plane_0
v9:
* Create a debugfs file for each plane in the device's debugfs
directory. This allows to test for each plane of each GPU
independently.
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-5-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/Kconfig')
| -rw-r--r-- | drivers/gpu/drm/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index f8a26423369e..959b19a04101 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -127,6 +127,15 @@ config DRM_PANIC_BACKGROUND_COLOR depends on DRM_PANIC default 0x000000 +config DRM_PANIC_DEBUG + bool "Add a debug fs entry to trigger drm_panic" + depends on DRM_PANIC && DEBUG_FS + help + Add dri/[device]/drm_panic_plane_x in the kernel debugfs, to force the + panic handler to write the panic message to this plane scanout buffer. + This is unsafe and should not be enabled on a production build. + If in doubt, say "N". + config DRM_DEBUG_DP_MST_TOPOLOGY_REFS bool "Enable refcount backtrace history in the DP MST helpers" depends on STACKTRACE_SUPPORT |