Module: Mesa
Branch: master
Commit: 4ab2ac334921ae9bbd1791adaf8977fccf744580
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=4ab2ac334921ae9bbd1791adaf8977fccf744580

Author: Marek Olšák <marek.ol...@amd.com>
Date:   Tue Mar 15 21:49:54 2016 +0100

radeonsi: fix Hyper-Z hangs on P2 configs

Cc: 11.1 11.2 <mesa-sta...@lists.freedesktop.org>
Reviewed-by: Nicolai Hähnle <nicolai.haeh...@amd.com>

---

 src/gallium/drivers/radeon/r600_texture.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/radeon/r600_texture.c 
b/src/gallium/drivers/radeon/r600_texture.c
index 1ad7076..c573b43 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -638,8 +638,14 @@ static unsigned r600_texture_get_htile_size(struct 
r600_common_screen *rscreen,
            rscreen->info.drm_major == 2 && rscreen->info.drm_minor < 38)
                return 0;
 
-       /* Overalign HTILE on Stoney to fix 
piglit/depthstencil-render-miplevels 585. */
-       if (rscreen->family == CHIP_STONEY)
+       /* Overalign HTILE on P2 configs to work around GPU hangs in
+        * piglit/depthstencil-render-miplevels 585.
+        *
+        * This has been confirmed to help Kabini & Stoney, where the hangs
+        * are always reproducible. I think I have seen the test hang
+        * on Carrizo too, though it was very rare there.
+        */
+       if (rscreen->chip_class >= CIK && num_pipes < 4)
                num_pipes = 4;
 
        switch (num_pipes) {

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