NACK: [SRU][S][PATCH 0/9] Add drm/i915 PREEMPT_RT support

[Benjamin Wheeler]

Nacking as I omitted UBUNTU: SAUCE: in the commit titles. I will resubmit

On Thu, Sep 24, 2026 at 8:06 AM Benjamin Wheeler <
benjamin.wheeler at canonical.com> wrote:

> BugLink: https://bugs.launchpad.net/bugs/2168432
>
> SRU justification:
>
> [Impact]
> drm/i915 drivers need additional patches to be compatible with
> PREEMPT_RT.
>
> [Fix]
> cherry-pick the upstream drm/i915 PREEMPT_RT patches.
>
> [Test Plan]
> Compiled and boot tested.
>
> [Where problems could occur]
> Problems or regressions could occur in the drm/i915 driver.
>
> Benjamin Wheeler (1):
>   UBUNTU: [debian] update master upstream-realtime
>
> Mike Galbraith (2):
>   drm/i915: Use preempt_disable/enable_rt() where recommended
>   drm/i915: Don't disable interrupts on PREEMPT_RT during atomic updates
>
> Sebastian Andrzej Siewior (6):
>   drm/i915: Disable tracing points on PREEMPT_RT
>   drm/i915/gt: Use spin_lock_irq() instead of local_irq_disable() +
>     spin_lock()
>   drm/i915: Drop the irqs_disabled() check
>   drm/i915/guc: Consider also RCU depth in busy loop.
>   Revert "drm/i915: Depend on !PREEMPT_RT."
>   drm/i915: Consider RCU read section as atomic.
>
>  debian.master/upstream-realtime               |  2 +-
>  drivers/gpu/drm/i915/Kconfig                  |  1 -
>  drivers/gpu/drm/i915/display/intel_crtc.c     |  9 ++--
>  drivers/gpu/drm/i915/display/intel_cursor.c   |  9 ++--
>  .../drm/i915/display/intel_display_trace.h    |  4 ++
>  drivers/gpu/drm/i915/display/intel_vblank.c   | 50 ++++++++++++++-----
>  drivers/gpu/drm/i915/gt/intel_engine_cs.c     |  2 +-
>  .../drm/i915/gt/intel_execlists_submission.c  | 17 ++-----
>  drivers/gpu/drm/i915/gt/uc/intel_guc.h        |  2 +-
>  drivers/gpu/drm/i915/i915_request.c           |  2 -
>  drivers/gpu/drm/i915/i915_trace.h             |  4 ++
>  drivers/gpu/drm/i915/intel_uncore_trace.h     |  4 ++
>  12 files changed, 70 insertions(+), 36 deletions(-)
>
> --
> 2.43.0
>
>
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