Module: Mesa Branch: master Commit: 6c655cfeb49a8142c44782c5164619a5860c7706 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=6c655cfeb49a8142c44782c5164619a5860c7706
Author: Marek Olšák <[email protected]> Date: Tue May 23 21:52:11 2017 +0200 radeonsi: fix a GPU hang with tessellation on 2-CU configs Only harvested Stoney has 2 CUs. Tested on 2-CU Stoney and Fiji forced to 2 CUs. Cc: 17.0 17.1 <[email protected]> Tested-by: Edmondo Tommasina <[email protected]> Tested-by: Dieter Nützel <[email protected]> --- src/gallium/drivers/radeonsi/si_state_draw.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c index 8651592fed..77df64397f 100644 --- a/src/gallium/drivers/radeonsi/si_state_draw.c +++ b/src/gallium/drivers/radeonsi/si_state_draw.c @@ -169,8 +169,12 @@ static void si_emit_derived_tess_state(struct si_context *sctx, /* Make sure that the data fits in LDS. This assumes the shaders only * use LDS for the inputs and outputs. + * + * While CIK can use 64K per threadgroup, there is a hang on Stoney + * with 2 CUs if we use more than 32K. The closed Vulkan driver also + * uses 32K at most on all GCN chips. */ - hardware_lds_size = sctx->b.chip_class >= CIK ? 65536 : 32768; + hardware_lds_size = 32768; *num_patches = MIN2(*num_patches, hardware_lds_size / (input_patch_size + output_patch_size)); _______________________________________________ mesa-commit mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-commit
