Messages in this thread Patch in this message | | | Date | Fri, 09 Mar 2012 11:02:55 -0800 | From | Greg KH <> | Subject | [ 53/95] drm/i915: gen7: Implement an L3 caching workaround. |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Eugeni Dodonov <eugeni.dodonov@intel.com>
commit e4e0c058a19c41150d12ad2d3023b3cf09c5de67 upstream.
This adds two cache-related workarounds for Ivy Bridge which can lead to 3D ring hangs and corruptions.
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@intel.com> Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/gpu/drm/i915/i915_reg.h | 7 +++++++ drivers/gpu/drm/i915/intel_display.c | 6 ++++++ 2 files changed, 13 insertions(+)
--- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2886,6 +2886,13 @@ #define DISP_TILE_SURFACE_SWIZZLING (1<<13) #define DISP_FBC_WM_DIS (1<<15) +/* GEN7 chicken */ +#define GEN7_L3CNTLREG1 0xB01C +#define GEN7_WA_FOR_GEN7_L3_CONTROL 0x3C4FFF8C + +#define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030 +#define GEN7_WA_L3_CHICKEN_MODE 0x20000000 + /* PCH */ /* south display engine interrupt */ --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8255,6 +8255,12 @@ static void ivybridge_init_clock_gating( I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE); + /* WaApplyL3ControlAndL3ChickenMode requires those two on Ivy Bridge */ + I915_WRITE(GEN7_L3CNTLREG1, + GEN7_WA_FOR_GEN7_L3_CONTROL); + I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, + GEN7_WA_L3_CHICKEN_MODE); + for_each_pipe(pipe) { I915_WRITE(DSPCNTR(pipe), I915_READ(DSPCNTR(pipe)) |
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