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drm/i915/tgl: Wa_1607138336

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Avoid possible deadlock on context switch.

Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191015154449.10338-9-mika.kuoppala@linux.intel.com
This commit is contained in:
Mika Kuoppala 2019-10-15 18:44:47 +03:00 committed by Chris Wilson
parent 2e19af9438
commit 79bfa607e6
2 changed files with 7 additions and 0 deletions
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5
drivers/gpu/drm/i915/gt/intel_workarounds.c
View File

@ -1281,6 +1281,11 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
wa_masked_en(wal,
GEN9_CS_DEBUG_MODE1,
FF_DOP_CLOCK_GATE_DISABLE);
/* Wa_1607138336:tgl */
wa_write_or(wal,
GEN9_CTX_PREEMPT_REG,
GEN12_DISABLE_POSH_BUSY_FF_DOP_CG);
}
if (IS_GEN(i915, 11)) {

2
drivers/gpu/drm/i915/i915_reg.h
View File

@ -7678,6 +7678,8 @@ enum {
#define GEN9_CS_DEBUG_MODE1 _MMIO(0x20ec)
#define FF_DOP_CLOCK_GATE_DISABLE REG_BIT(1)
#define GEN9_CTX_PREEMPT_REG _MMIO(0x2248)
#define GEN12_DISABLE_POSH_BUSY_FF_DOP_CG REG_BIT(11)
#define GEN8_CS_CHICKEN1 _MMIO(0x2580)
#define GEN9_PREEMPT_3D_OBJECT_LEVEL (1 << 0)
#define GEN9_PREEMPT_GPGPU_LEVEL(hi, lo) (((hi) << 2) | ((lo) << 1))