Commit 65df78bd authored by Mika Kuoppala's avatar Mika Kuoppala Committed by Chris Wilson
Browse files

drm/i915/tgl: Wa_1409420604 



Avoid possible hang in CPSS unit.

Signed-off-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191015154449.10338-6-mika.kuoppala@linux.intel.com
parent 99739f94

drivers/gpu/drm/i915/gt/intel_workarounds.c

+5 −0
Original line number Diff line number Diff line
@@ -902,6 +902,11 @@ icl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) 
static void

tgl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)

{

	/* Wa_1409420604:tgl */

	if (IS_TGL_REVID(i915, TGL_REVID_A0, TGL_REVID_A0))

		wa_write_or(wal,

			    SUBSLICE_UNIT_LEVEL_CLKGATE2,

			    CPSSUNIT_CLKGATE_DIS);

}



static void

drivers/gpu/drm/i915/i915_reg.h

+3 −0
Original line number Diff line number Diff line
@@ -4056,6 +4056,9 @@ enum { 
#define SUBSLICE_UNIT_LEVEL_CLKGATE	_MMIO(0x9524)

#define  GWUNIT_CLKGATE_DIS		(1 << 16)



#define SUBSLICE_UNIT_LEVEL_CLKGATE2	_MMIO(0x9528)

#define  CPSSUNIT_CLKGATE_DIS		REG_BIT(9)



#define UNSLICE_UNIT_LEVEL_CLKGATE	_MMIO(0x9434)

#define  VFUNIT_CLKGATE_DIS		(1 << 20)

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