diff options
| -rw-r--r-- | src/intel/compiler/brw_fs.cpp | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp index 4616529abcf..2dee841c09b 100644 --- a/src/intel/compiler/brw_fs.cpp +++ b/src/intel/compiler/brw_fs.cpp @@ -6166,6 +6166,31 @@ fs_visitor::run_gs() return !failed; } +/* From the SKL PRM, Volume 16, Workarounds: + * + * 0877 3D Pixel Shader Hang possible when pixel shader dispatched with + * only header phases (R0-R2) + * + * WA: Enable a non-header phase (e.g. push constant) when dispatch would + * have been header only. + * + * Instead of enabling push constants one can alternatively enable one of the + * inputs. Here one simply chooses "layer" which shouldn't impose much + * overhead. + */ +static void +gen9_ps_header_only_workaround(struct brw_wm_prog_data *wm_prog_data) +{ + if (wm_prog_data->num_varying_inputs) + return; + + if (wm_prog_data->base.curb_read_length) + return; + + wm_prog_data->urb_setup[VARYING_SLOT_LAYER] = 0; + wm_prog_data->num_varying_inputs = 1; +} + bool fs_visitor::run_fs(bool allow_spilling, bool do_rep_send) { @@ -6229,6 +6254,10 @@ fs_visitor::run_fs(bool allow_spilling, bool do_rep_send) optimize(); assign_curb_setup(); + + if (devinfo->gen >= 9) + gen9_ps_header_only_workaround(wm_prog_data); + assign_urb_setup(); fixup_3src_null_dest(); |