diff options
| author | Eric Anholt <eric@anholt.net> | 2011-11-07 16:07:05 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:54:07 -0800 |
| commit | 8f9940d1bf1d7dface90977031e327ee237408ca (patch) | |
| tree | 51925cc849896474860b83da8c0a95180aab86e4 /drivers | |
| parent | 9bdbb716a8c3a3363d40b198f351d78bfecd8917 (diff) | |
| download | lwn-8f9940d1bf1d7dface90977031e327ee237408ca.tar.gz lwn-8f9940d1bf1d7dface90977031e327ee237408ca.zip | |
drm/i915: Turn on another required clock gating bit on gen6.
commit 9ca1d10d748e56964de95e3ed80211b192f56cf4 upstream.
Unlike the previous one, I don't have known testcases it fixes. I'd
rather not go through the same debug cycle on whatever testcases those
might be.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 7 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 900ef944d96a..ad381a236b3c 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3403,6 +3403,7 @@ #define GEN6_UCGCTL2 0x9404 # define GEN6_RCPBUNIT_CLOCK_GATE_DISABLE (1 << 12) +# define GEN6_RCCUNIT_CLOCK_GATE_DISABLE (1 << 11) #define GEN6_RPNSWREQ 0xA008 #define GEN6_TURBO_DISABLE (1<<31) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 6ebfbb6a5590..07e7cf38068a 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7888,8 +7888,13 @@ static void gen6_init_clock_gating(struct drm_device *dev) * some amount of runtime in the Mesa "fire" demo, and Unigine * Sanctuary and Tropics, and apparently anything else with * alpha test or pixel discard. + * + * According to the spec, bit 11 (RCCUNIT) must also be set, + * but we didn't debug actual testcases to find it out. */ - I915_WRITE(GEN6_UCGCTL2, GEN6_RCPBUNIT_CLOCK_GATE_DISABLE); + I915_WRITE(GEN6_UCGCTL2, + GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | + GEN6_RCCUNIT_CLOCK_GATE_DISABLE); /* * According to the spec the following bits should be |