diff --git a/src/etnaviv/drm/etnaviv_cmd_stream.c b/src/etnaviv/drm/etnaviv_cmd_stream.c index 657ef0c0514..89e28e21b1a 100644 --- a/src/etnaviv/drm/etnaviv_cmd_stream.c +++ b/src/etnaviv/drm/etnaviv_cmd_stream.c @@ -230,6 +230,9 @@ void etna_cmd_stream_flush(struct etna_cmd_stream *stream, int in_fence_fd, if (gpu->dev->use_softpin) req.flags |= ETNA_SUBMIT_SOFTPIN; + if (stream->offset == priv->offset_end_of_context_init && !out_fence_fd) + is_noop = true; + if (unlikely(is_noop)) ret = 0; else @@ -254,6 +257,7 @@ void etna_cmd_stream_flush(struct etna_cmd_stream *stream, int in_fence_fd, priv->submit.nr_relocs = 0; priv->submit.nr_pmrs = 0; priv->nr_bos = 0; + priv->offset_end_of_context_init = 0; } void etna_cmd_stream_reloc(struct etna_cmd_stream *stream, @@ -284,6 +288,18 @@ void etna_cmd_stream_ref_bo(struct etna_cmd_stream *stream, struct etna_bo *bo, bo2idx(stream, bo, flags); } +void etna_cmd_stream_mark_end_of_context_init(struct etna_cmd_stream *stream) +{ + struct etna_cmd_stream_priv *priv = etna_cmd_stream_priv(stream); + + /* + * All commands before the end of context init are guaranteed to only alter GPU internal + * state and have no externally visible side effects, so we can skip the submit if the + * command buffer contains only context init commands. + */ + priv->offset_end_of_context_init = stream->offset; +} + void etna_cmd_stream_perf(struct etna_cmd_stream *stream, const struct etna_perf *p) { struct etna_cmd_stream_priv *priv = etna_cmd_stream_priv(stream); diff --git a/src/etnaviv/drm/etnaviv_drmif.h b/src/etnaviv/drm/etnaviv_drmif.h index 9b492455c3e..ad77039fe01 100644 --- a/src/etnaviv/drm/etnaviv_drmif.h +++ b/src/etnaviv/drm/etnaviv_drmif.h @@ -206,6 +206,8 @@ void etna_cmd_stream_reloc(struct etna_cmd_stream *stream, const struct etna_rel void etna_cmd_stream_ref_bo(struct etna_cmd_stream *stream, struct etna_bo *bo, uint32_t flags); +void etna_cmd_stream_mark_end_of_context_init(struct etna_cmd_stream *stream); + /* performance monitoring functions: */ diff --git a/src/etnaviv/drm/etnaviv_priv.h b/src/etnaviv/drm/etnaviv_priv.h index 0f34c63e16c..630f91cd01e 100644 --- a/src/etnaviv/drm/etnaviv_priv.h +++ b/src/etnaviv/drm/etnaviv_priv.h @@ -134,6 +134,7 @@ struct etna_cmd_stream_priv { struct etna_pipe *pipe; uint32_t last_timestamp; + uint32_t offset_end_of_context_init; /* submit ioctl related tables: */ struct {