Mesa (master): i965/blorp: Don't resolve HiZ unless we're reinterpreting

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Module: Mesa
Branch: master
Commit: ea7446ba82b1d4225ae2e462340e529194514768
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=ea7446ba82b1d4225ae2e462340e529194514768

Author: Jason Ekstrand <jason at jlekstrand.net>
Date:   Tue Dec  3 20:31:24 2019 -0600

i965/blorp: Don't resolve HiZ unless we're reinterpreting

This eliminates 50% of pixels (2M) rendered for a blit in GS:GO.  This
accounts for 3% of pixels rendered in the game.  Total GPU clocks for
the first 900 frames of CSGO improves by 1%.

Tested-by: Mark Janes <mark.a.janes at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/brw_blorp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_blorp.c b/src/mesa/drivers/dri/i965/brw_blorp.c
index 873c1a6c1c8..0ac636bb88c 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp.c
+++ b/src/mesa/drivers/dri/i965/brw_blorp.c
@@ -395,7 +395,7 @@ brw_blorp_blit_miptrees(struct brw_context *brw,
    /* We do format workarounds for some depth formats so we can't reliably
     * sample with HiZ.  One of these days, we should fix that.
     */
-   if (src_aux_usage == ISL_AUX_USAGE_HIZ)
+   if (src_aux_usage == ISL_AUX_USAGE_HIZ && src_mt->format != src_format)
       src_aux_usage = ISL_AUX_USAGE_NONE;
    const bool src_clear_supported =
       src_aux_usage != ISL_AUX_USAGE_NONE && src_mt->format == src_format;