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Commit b403c8fe authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Remove BXT TDL state w/a 



This w/a (WaClearTdlStateAckDirtyBits) was only used for preproduction hw,
which is no longer in use. Remove the workaround to simplify the code.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170123130601.2281-5-chris@chris-wilson.co.uk


Reviewed-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
parent 68bee615

drivers/gpu/drm/i915/intel_lrc.c

+0 −19
Original line number Diff line number Diff line
@@ -1170,25 +1170,6 @@ static int gen9_init_perctx_bb(struct intel_engine_cs *engine, 
{

	uint32_t index = wa_ctx_start(wa_ctx, *offset, CACHELINE_DWORDS);



	/* WaClearTdlStateAckDirtyBits:bxt */

	if (IS_BXT_REVID(engine->i915, 0, BXT_REVID_B0)) {

		wa_ctx_emit(batch, index, MI_LOAD_REGISTER_IMM(4));



		wa_ctx_emit_reg(batch, index, GEN8_STATE_ACK);

		wa_ctx_emit(batch, index, _MASKED_BIT_DISABLE(GEN9_SUBSLICE_TDL_ACK_BITS));



		wa_ctx_emit_reg(batch, index, GEN9_STATE_ACK_SLICE1);

		wa_ctx_emit(batch, index, _MASKED_BIT_DISABLE(GEN9_SUBSLICE_TDL_ACK_BITS));



		wa_ctx_emit_reg(batch, index, GEN9_STATE_ACK_SLICE2);

		wa_ctx_emit(batch, index, _MASKED_BIT_DISABLE(GEN9_SUBSLICE_TDL_ACK_BITS));



		wa_ctx_emit_reg(batch, index, GEN7_ROW_CHICKEN2);

		/* dummy write to CS, mask bits are 0 to ensure the register is not modified */

		wa_ctx_emit(batch, index, 0x0);

		wa_ctx_emit(batch, index, MI_NOOP);

	}



	wa_ctx_emit(batch, index, MI_BATCH_BUFFER_END);



	return wa_ctx_end(wa_ctx, *offset = index, 1);