Commit ab37c4d7 authored Sep 10, 2019 by Chris Wilson

drm/i915/tgl: Disable rc6 for debugging

Empirical evidence from CI tells us that our rc6 setup for Tigerlake is
off. Disable rc6 on tgl temporary so that we gain CI coverage as we
prepare a fix. It also appears that the BIOS on our tgl leaves rc6
enabled, so we have to explicitly disable it on init.

References: https://bugs.freedesktop.org/show_bug.cgi?id=111593

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190910161657.23037-1-chris@chris-wilson.co.uk

parent 07e98eb0

drivers/gpu/drm/i915/i915_pci.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -797,6 +797,7 @@ static const struct intel_device_info intel_tigerlake_12_info = {
		.display.has_modular_fia = 1,
		.engine_mask =
		BIT(RCS0) \| BIT(BCS0) \| BIT(VECS0) \| BIT(VCS0) \| BIT(VCS2),
		.has_rc6 = false, /* XXX disabled for debugging */
		};

		#undef GEN

+1 −2

Original line number	Diff line number	Diff line
		@@ -8671,7 +8671,6 @@ void intel_disable_gt_powersave(struct drm_i915_private *dev_priv)
		{
		mutex_lock(&dev_priv->gt_pm.rps.lock);

		if (HAS_RC6(dev_priv))
		intel_disable_rc6(dev_priv);

		intel_disable_rps(dev_priv);