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| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2016-06-07 17:19:11 +0300 |
|---|---|---|
| committer | Mika Kuoppala <mika.kuoppala@intel.com> | 2016-07-15 15:51:27 +0300 |
| commit | 3af5f1137c8b5981c754e47d2c233bc3013d2d00 (patch) | |
| tree | 62f2aa9c1e896dcfe17e387950bfc73fe6bdaed8 /drivers/gpu/drm | |
| parent | a725e1dc4e16a34e3de79b0a6db2ef608fecae4c (diff) | |
| download | linux-3af5f1137c8b5981c754e47d2c233bc3013d2d00.tar.xz | |
drm/i915/kbl: Add WaDisableGafsUnitClkGating
We need to disable clock gating in this unit to work around
hardware issue causing possible corruption/hang.
v2: name the bit (Ville)
v3: leave the fix enabled for 2227050 and set correct bit (Matthew)
v4: Split out the skl part in separate commit for easier backport
References: HSD#2227156, HSD#2227050
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-20-git-send-email-mika.kuoppala@intel.com
(cherry picked from commit 4de5d7ccbccc88d2f7b1bcdc2180196ded7db8b8)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index da9d243aaf34..a88ac2790385 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1230,6 +1230,9 @@ static int kbl_init_workarounds(struct intel_engine_cs *engine) WA_SET_BIT_MASKED(COMMON_SLICE_CHICKEN2, GEN8_SBE_DISABLE_REPLAY_BUF_OPTIMIZATION); + /* WaDisableGafsUnitClkGating:kbl */ + WA_SET_BIT(GEN7_UCGCTL4, GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); + /* WaDisableLSQCROPERFforOCL:kbl */ ret = wa_ring_whitelist_reg(engine, GEN8_L3SQCREG4); if (ret) |