From: Daniel Vetter Date: Fri, 23 Oct 2015 08:56:12 +0000 (+0200) Subject: drm/i915: shut up gen8+ SDE irq dmesg noise X-Git-Tag: MMI-PSA29.97-13-9~7427^2~45^2~1253 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=97e5ed1111dcc5300a0f59a55248cd243937a8ab;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git drm/i915: shut up gen8+ SDE irq dmesg noise We get tons of cases where the master interrupt handler apparently set a bit, with the SDEIIR disagreeing. No idea what's going on there, but it's consistent on gen8+, no one seems to care about it and it's making CI results flaky. Shut it up. No idea what's going on here, but we've had fun with PCH interrupts before: commit 44498aea293b37af1d463acd9658cdce1ecdf427 Author: Paulo Zanoni Date: Fri Feb 22 17:05:28 2013 -0300 drm/i915: also disable south interrupts when handling them Note that there's a regression report in Bugzilla, and other regression reports on the mailing lists keep croping up. But no ill effects have ever been reported. But for paranoia still keep the message at a debug level as a breadcrumb, just in case. This message was introduced in commit 38cc46d73ed99dd7002f1406002e52d7975d16cc Author: Oscar Mateo Date: Mon Jun 16 16:10:59 2014 +0100 drm/i915/bdw: Ack interrupts before handling them (GEN8) v2: Improve commit message a bit. Cc: Paulo Zanoni Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1445590572-23631-2-git-send-email-daniel.vetter@ffwll.ch Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92084 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80896 Acked-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index a2bcdcffbfcf..bd1962527687 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -2353,9 +2353,13 @@ static irqreturn_t gen8_irq_handler(int irq, void *arg) spt_irq_handler(dev, pch_iir); else cpt_irq_handler(dev, pch_iir); - } else - DRM_ERROR("The master control interrupt lied (SDE)!\n"); - + } else { + /* + * Like on previous PCH there seems to be something + * fishy going on with forwarding PCH interrupts. + */ + DRM_DEBUG_DRIVER("The master control interrupt lied (SDE)!\n"); + } } I915_WRITE_FW(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);