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[5/7] drm/i915: Don't wait for PCH on reset

Message ID 1365192765-3485-5-git-send-email-ben@bwidawsk.net (mailing list archive)
State New, archived
Headers show

Commit Message

Ben Widawsky April 5, 2013, 8:12 p.m. UTC 
BIOS should be setting this, but in case it doesn't...

v2: Define the bits we actually want to clear (Jesse)
Make it an RMW op (Jesse)

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_gem.c | 6 ++++++
 drivers/gpu/drm/i915/i915_reg.h | 3 +++
 2 files changed, 9 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 8a2cbee..f2d4970 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3991,6 +3991,12 @@  i915_gem_init_hw(struct drm_device *dev)
 	if (IS_HASWELL(dev) && (I915_READ(0x120010) == 1))
 		I915_WRITE(0x9008, I915_READ(0x9008) | 0xf0000);
 
+	if (HAS_PCH_NOP(dev)) {
+		u32 temp = I915_READ(GEN7_MSG_CTL);
+		temp &= ~(WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK);
+		I915_WRITE(GEN7_MSG_CTL, temp);
+	}
+
 	i915_gem_l3_remap(dev);
 
 	i915_gem_init_swizzling(dev);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 50dba38..61b5b4f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3483,6 +3483,9 @@ 
 #define DISP_ARB_CTL	0x45000
 #define  DISP_TILE_SURFACE_SWIZZLING	(1<<13)
 #define  DISP_FBC_WM_DIS		(1<<15)
+#define GEN7_MSG_CTL	0x45010
+#define  WAIT_FOR_PCH_RESET_ACK		(1<<1)
+#define  WAIT_FOR_PCH_FLR_ACK		(1<<0)
 
 /* GEN7 chicken */
 #define GEN7_COMMON_SLICE_CHICKEN1		0x7010