[Mesa-dev] [PATCH] radeonsi: fix Hyper-Z hangs on P2 configs

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

Cc: 11.1 11.2 <mesa-stable at lists.freedesktop.org>
---
 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 115c728..3957e71 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -629,8 +629,14 @@ 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) {
-- 
2.5.0