From 5e0902cd2abf21df955be359e0903fc5b66905f5 Mon Sep 17 00:00:00 2001 From: Nanley Chery Date: Thu, 15 Dec 2016 09:57:48 -0800 Subject: [PATCH] anv/blorp: Don't fast depth clear samplable HiZ buffers on BDW Avoid the resolves that would be required if fast depth clears were allowed for such buffers. Signed-off-by: Nanley Chery Reviewed-by: Jason Ekstrand --- src/intel/vulkan/anv_blorp.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/intel/vulkan/anv_blorp.c b/src/intel/vulkan/anv_blorp.c index b161400db57..2edd0712c95 100644 --- a/src/intel/vulkan/anv_blorp.c +++ b/src/intel/vulkan/anv_blorp.c @@ -1271,6 +1271,15 @@ anv_cmd_buffer_clear_subpass(struct anv_cmd_buffer *cmd_buffer) * ANV_HZ_FC_VAL. */ clear_with_hiz = false; + } else if (gen == 8 && + anv_can_sample_with_hiz(cmd_buffer->device->info.gen, + iview->image->samples)) { + /* Only gen9+ supports returning ANV_HZ_FC_VAL when sampling a + * fast-cleared portion of a HiZ buffer. Testing has revealed + * that Gen8 only supports returning 0.0f. Gens prior to gen8 do + * not support this feature at all. + */ + clear_with_hiz = false; } } -- 2.30.2