Re: [PATCH] drm/i915: Depend on !PREEMPT_RT.

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Hi,

On 25/02/2022 23:03, Sebastian Andrzej Siewior wrote:
On 2022-02-14 19:59:08 [+0100], To intel-gfx@xxxxxxxxxxxxxxxxxxxxx wrote:
There are a few sections in the driver which are not compatible with
PREEMPT_RT. They trigger warnings and can lead to deadlocks at runtime.

Disable the i915 driver on a PREEMPT_RT enabled kernel. This way
PREEMPT_RT itself can be enabled without needing to address the i915
issues first. The RT related patches are still in RT queue and will be
handled later.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>

A gentle ping ;)

Could you paste a link to the queue of i915 patches pending for a quick overview of how much work there is and in what areas?

Also, I assume due absence of ARCH_SUPPORTS_RT being defined by any arch, that something more is not yet ready?

Regards,

Tvrtko

---
  drivers/gpu/drm/i915/Kconfig | 1 +
  1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index a4c94dc2e2164..3aa719d5a0f0d 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -3,6 +3,7 @@ config DRM_I915
  	tristate "Intel 8xx/9xx/G3x/G4x/HD Graphics"
  	depends on DRM
  	depends on X86 && PCI
+	depends on !PREEMPT_RT
  	select INTEL_GTT
  	select INTERVAL_TREE
  	# we need shmfs for the swappable backing store, and in particular

Sebastian



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