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drm/i915: Implement WaDisableEarlyEOT.

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There seems to be another clock gating issue which the workaround is
described as:

   "WA: Set 0xE4F0[1] = 1 to disable Early EOT of thread."

Signed-off-by: Rafael Antognolli <rafael.antognolli@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171216001117.14232-2-rafael.antognolli@intel.com
This commit is contained in:
Rafael Antognolli 2017-12-15 16:11:17 -08:00 committed by Rodrigo Vivi
parent 01ab0f9216
commit a2b1658857
2 changed files with 4 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -8146,6 +8146,7 @@ enum {
#define PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE (1<<8)
#define STALL_DOP_GATING_DISABLE (1<<5)
#define THROTTLE_12_5 (7<<2)
#define DISABLE_EARLY_EOT (1<<1)
#define GEN7_ROW_CHICKEN2 _MMIO(0xe4f4)
#define GEN7_ROW_CHICKEN2_GT2 _MMIO(0xf4f4)

3
drivers/gpu/drm/i915/intel_engine_cs.c
View File

@ -1272,6 +1272,9 @@ static int cnl_init_workarounds(struct intel_engine_cs *engine)
if (ret)
return ret;
/* WaDisableEarlyEOT:cnl */
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN, DISABLE_EARLY_EOT);
return 0;
}