Commit c584e2d3 authored by Mika Kuoppala's avatar Mika Kuoppala Committed by Mika Kuoppala
Browse files

drm/i195/fbc: Add WaFbcNukeOnHostModify 



Bspec states that we need to set nuke on modify all to prevent
screen corruption with fbc on skl and kbl.

v2: proper workaround name

References: HSD#2227109, HSDES#1404569388
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarMika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465309159-30531-27-git-send-email-mika.kuoppala@intel.com


(cherry picked from commit 031cd8c8)
Signed-off-by: default avatarMika Kuoppala <mika.kuoppala@intel.com>
parent 5b889896

drivers/gpu/drm/i915/i915_reg.h

+1 −0
Original line number Diff line number Diff line
@@ -2206,6 +2206,7 @@ enum skl_disp_power_wells { 
#define ILK_DPFC_STATUS		_MMIO(0x43210)

#define ILK_DPFC_FENCE_YOFF	_MMIO(0x43218)

#define ILK_DPFC_CHICKEN	_MMIO(0x43224)

#define   ILK_DPFC_NUKE_ON_ANY_MODIFICATION	(1<<23)

#define ILK_FBC_RT_BASE		_MMIO(0x2128)

#define   ILK_FBC_RT_VALID	(1<<0)

#define   SNB_FBC_FRONT_BUFFER	(1<<1)

drivers/gpu/drm/i915/intel_pm.c

+10 −0
Original line number Diff line number Diff line
@@ -6737,11 +6737,21 @@ static void kabylake_init_clock_gating(struct drm_device *dev) 
	if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0))

		I915_WRITE(GEN6_UCGCTL1, I915_READ(GEN6_UCGCTL1) |

			   GEN6_GAMUNIT_CLOCK_GATE_DISABLE);



	/* WaFbcNukeOnHostModify:kbl */

	I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) |

		   ILK_DPFC_NUKE_ON_ANY_MODIFICATION);

}



static void skylake_init_clock_gating(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = dev->dev_private;



	gen9_init_clock_gating(dev);



	/* WaFbcNukeOnHostModify:skl */

	I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) |

		   ILK_DPFC_NUKE_ON_ANY_MODIFICATION);

}



static void broadwell_init_clock_gating(struct drm_device *dev)

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