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| author | Junxiao Chang <[email protected]> | 2025-04-25 15:11:07 +0000 |
|---|---|---|
| committer | Rodrigo Vivi <[email protected]> | 2025-06-30 18:21:06 +0000 |
| commit | dccf655f69002d496a527ba441b4f008aa5bebbf (patch) | |
| tree | 807c100247431d7e4187222a7db51770bbe53b38 /drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | |
| parent | drm/i915/gt: Fix timeline left held on VMA alloc error (diff) | |
| download | kernel-dccf655f69002d496a527ba441b4f008aa5bebbf.tar.gz kernel-dccf655f69002d496a527ba441b4f008aa5bebbf.zip | |
drm/i915/gsc: mei interrupt top half should be in irq disabled context
MEI GSC interrupt comes from i915. It has top half and bottom half.
Top half is called from i915 interrupt handler. It should be in
irq disabled context.
With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
top half might be in threaded IRQ context. generic_handle_irq_safe API
could be called from either IRQ or process context, it disables local
IRQ then calls MEI GSC interrupt top half.
This change fixes A380/A770 GPU boot hang issue with RT kernel.
Fixes: 1e3dc1d8622b ("drm/i915/gsc: add gsc as a mei auxiliary device")
Tested-by: Furong Zhou <[email protected]>
Suggested-by: Sebastian Andrzej Siewior <[email protected]>
Acked-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Junxiao Chang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Rodrigo Vivi <[email protected]>
Signed-off-by: Rodrigo Vivi <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c')
0 files changed, 0 insertions, 0 deletions