Since we inherited the context image setup from gen8 which needed a per-bb workaround (for GPGPU), we are submitting an empty per-bb buffer on gen9. Now that we can skip adding the buffer to the context image, remove the dangling per-bb. This slightly improves execution latency, most notably on an idle engine.
References: https://bugs.freedesktop.org/show_bug.cgi?id=87725 Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com> --- drivers/gpu/drm/i915/intel_lrc.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 297c9c1564e5..91a5411bb9da 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1171,13 +1171,6 @@ static u32 *gen9_init_indirectctx_bb(struct intel_engine_cs *engine, u32 *batch) return batch; } -static u32 *gen9_init_perctx_bb(struct intel_engine_cs *engine, u32 *batch) -{ - *batch++ = MI_BATCH_BUFFER_END; - - return batch; -} - #define CTX_WA_BB_OBJ_SIZE (PAGE_SIZE) static int lrc_setup_wa_ctx(struct intel_engine_cs *engine) @@ -1234,7 +1227,7 @@ static int intel_init_workaround_bb(struct intel_engine_cs *engine) return 0; case 9: wa_bb_fn[0] = gen9_init_indirectctx_bb; - wa_bb_fn[1] = gen9_init_perctx_bb; + wa_bb_fn[1] = NULL; break; case 8: wa_bb_fn[0] = gen8_init_indirectctx_bb; -- 2.14.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
