[Mesa-dev] [PATCH 1/4] radeonsi: disable DCC MSAA for 128bpp formats on Stoney

[Marek Olšák]

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

Cc: 18.1 <mesa-stable at lists.freedesktop.org>
---
 src/gallium/drivers/radeonsi/si_texture.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/gallium/drivers/radeonsi/si_texture.c b/src/gallium/drivers/radeonsi/si_texture.c
index b46208be252..05d5d1b8a6d 100644
--- a/src/gallium/drivers/radeonsi/si_texture.c
+++ b/src/gallium/drivers/radeonsi/si_texture.c
@@ -266,20 +266,25 @@ static int si_init_surface(struct si_screen *sscreen,
 		if (is_stencil)
 			flags |= RADEON_SURF_SBUFFER;
 	}
 
 	if (sscreen->info.chip_class >= VI &&
 	    (ptex->flags & SI_RESOURCE_FLAG_DISABLE_DCC ||
 	     ptex->format == PIPE_FORMAT_R9G9B9E5_FLOAT ||
 	     (ptex->nr_samples >= 2 && !sscreen->dcc_msaa_allowed)))
 		flags |= RADEON_SURF_DISABLE_DCC;
 
+	/* Stoney: 128bpp MSAA textures randomly fail piglit tests with DCC. */
+	if (sscreen->info.family == CHIP_STONEY &&
+	    bpe == 16 && ptex->nr_samples >= 2)
+		flags |= RADEON_SURF_DISABLE_DCC;
+
 	/* VI: DCC clear for 4x and 8x MSAA array textures unimplemented. */
 	if (sscreen->info.chip_class == VI &&
 	    num_color_samples >= 4 &&
 	    ptex->array_size > 1)
 		flags |= RADEON_SURF_DISABLE_DCC;
 
 	/* GFX9: DCC clear for 4x and 8x MSAA textures unimplemented. */
 	if (sscreen->info.chip_class >= GFX9 &&
 	    num_color_samples >= 4)
 		flags |= RADEON_SURF_DISABLE_DCC;
-- 
2.17.1