[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20120309190206.700821926@linuxfoundation.org>
Date: Fri, 09 Mar 2012 11:02:56 -0800
From: Greg KH <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
alan@...rguk.ukuu.org.uk,
Eugeni Dodonov <eugeni.dodonov@...el.com>,
Kenneth Graunke <kenneth@...tecape.org>,
Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: [ 54/95] drm/i915: gen7: work around a system hang on IVB
3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Eugeni Dodonov <eugeni.dodonov@...el.com>
commit db099c8f963fe656108e0a068274c5580a17f69b upstream.
This adds the workaround for WaCatErrorRejectionIssue which could result
in a system hang.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=41353
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44610
Tested-by: Eugeni Dodonov <eugeni.dodonov@...el.com>
Reviewed-by: Kenneth Graunke <kenneth@...tecape.org>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@...el.com>
Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/gpu/drm/i915/i915_reg.h | 4 ++++
drivers/gpu/drm/i915/intel_display.c | 5 +++++
2 files changed, 9 insertions(+)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2893,6 +2893,10 @@
#define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030
#define GEN7_WA_L3_CHICKEN_MODE 0x20000000
+/* WaCatErrorRejectionIssue */
+#define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030
+#define GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB (1<<11)
+
/* PCH */
/* south display engine interrupt */
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8261,6 +8261,11 @@ static void ivybridge_init_clock_gating(
I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
GEN7_WA_L3_CHICKEN_MODE);
+ /* This is required by WaCatErrorRejectionIssue */
+ I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
+ I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
+ GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
+
for_each_pipe(pipe) {
I915_WRITE(DSPCNTR(pipe),
I915_READ(DSPCNTR(pipe)) |
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists