diff options
| author | Francisco Jerez <[email protected]> | 2016-01-02 19:06:48 -0800 |
|---|---|---|
| committer | Francisco Jerez <[email protected]> | 2016-01-14 19:26:23 -0800 |
| commit | c8df0e7bf35cbab649c8d0e0205746293e686ce3 (patch) | |
| tree | 92ae7a10a240259080e82264535d95e4142c5cda | |
| parent | 635be1402c485b154ab1bf23e5448827364e70a5 (diff) | |
i965/gen7: Emit stall and dummy primitive draw after switching to the 3D pipeline.
This hardware bug can supposedly lead to a hang on IVB and VLV.
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_misc_state.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_misc_state.c b/src/mesa/drivers/dri/i965/brw_misc_state.c index 8335865b2d3..3686cdf8ff4 100644 --- a/src/mesa/drivers/dri/i965/brw_misc_state.c +++ b/src/mesa/drivers/dri/i965/brw_misc_state.c @@ -944,6 +944,30 @@ brw_emit_select_pipeline(struct brw_context *brw, enum brw_pipeline pipeline) (brw->gen >= 9 ? (3 << 8) : 0) | (pipeline == BRW_COMPUTE_PIPELINE ? 2 : 0)); ADVANCE_BATCH(); + + if (brw->gen == 7 && !brw->is_haswell && + pipeline == BRW_RENDER_PIPELINE) { + /* From "BXML » GT » MI » vol1a GPU Overview » [Instruction] + * PIPELINE_SELECT [DevBWR+]": + * + * Project: DEVIVB, DEVHSW:GT3:A0 + * + * Software must send a pipe_control with a CS stall and a post sync + * operation and then a dummy DRAW after every MI_SET_CONTEXT and + * after any PIPELINE_SELECT that is enabling 3D mode. + */ + gen7_emit_cs_stall_flush(brw); + + BEGIN_BATCH(7); + OUT_BATCH(CMD_3D_PRIM << 16 | (7 - 2)); + OUT_BATCH(_3DPRIM_POINTLIST); + OUT_BATCH(0); + OUT_BATCH(0); + OUT_BATCH(0); + OUT_BATCH(0); + OUT_BATCH(0); + ADVANCE_BATCH(); + } } /** |