From 116ac8d26101c06ad80a4e1cb560db1c525397f8 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Wed, 21 Dec 2011 10:31:09 -0800 Subject: [PATCH] drm/i915: Set two chicken bits implicated in missed IRQs on Ivybridge. They don't fix our problems alone, but we're told to set them. Signed-off-by: Eric Anholt Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/i915_reg.h | 4 ++++ drivers/gpu/drm/i915/intel_display.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index eb44432d79b..edced95aa75 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3020,6 +3020,10 @@ #define ILK_DPFC_DIS1 (1<<8) #define ILK_DPFC_DIS2 (1<<9) +#define IVB_CHICKEN3 0x4200c +# define CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE (1 << 5) +# define CHICKEN3_DGMG_DONE_FIX_DISABLE (1 << 2) + #define DISP_ARB_CTL 0x45000 #define DISP_TILE_SURFACE_SWIZZLING (1<<13) #define DISP_FBC_WM_DIS (1<<15) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 30397b74a4a..2e00c8ae361 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -8450,6 +8450,10 @@ static void ivybridge_init_clock_gating(struct drm_device *dev) I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE); + I915_WRITE(IVB_CHICKEN3, + CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | + CHICKEN3_DGMG_DONE_FIX_DISABLE); + for_each_pipe(pipe) { I915_WRITE(DSPCNTR(pipe), I915_READ(DSPCNTR(pipe)) | -- 2.20.1