[PATCH] etnaviv: bugfix: Don't do resolve-in-place without valid TS

[Lucas Stach]

Am Mittwoch, den 01.11.2017, 11:17 +0100 schrieb Wladimir J. van der Laan:
> GC3000 resolve-in-place assumes that the TS state is configured.
> If it is not, this will result in MMU errors. This is especially
> apparent when using glGenMipmaps().
> 
> Fixes a problem introduced in 78ade659569ee6fe9bd244170956139f19dd8c6c.
> 
> > Signed-off-by: Wladimir J. van der Laan <laanwj at gmail.com>
> ---
>  src/gallium/drivers/etnaviv/etnaviv_clear_blit.c | 4 ++++
>  src/gallium/drivers/etnaviv/etnaviv_emit.c       | 4 ++++
>  src/gallium/drivers/etnaviv/etnaviv_rs.c         | 1 +
>  src/gallium/drivers/etnaviv/etnaviv_rs.h         | 2 ++
>  4 files changed, 11 insertions(+)
> 
> Ooops. This seems like an obvious oversight but I hadn't thought we would get
> into this path at all when there is no TS to "flush".

And that's probably what we should fix. The self-resolve cases on
resource flush and sampler update don't check the TS status, but they
are only useful if there is a valid TS.

With the change you did here we are still wasting bandwidth for a no-op 
blit on older cores like GC880 when generating mipmaps.

Regards,
Lucas
 
> diff --git a/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c b/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
> index c62287b..8fc7cfc 100644
> --- a/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
> +++ b/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
> @@ -555,6 +555,7 @@ etna_try_rs_blit(struct pipe_context *pctx,
>     }
>  
>     /* Set up color TS to source surface before blit, if needed */
> +   bool source_ts_valid = false;
>     if (src->levels[blit_info->src.level].ts_size &&
>         src->levels[blit_info->src.level].ts_valid) {
>        struct etna_reloc reloc;
> @@ -579,6 +580,8 @@ etna_try_rs_blit(struct pipe_context *pctx,
>  
>        etna_set_state(ctx->stream, VIVS_TS_COLOR_CLEAR_VALUE,
>                       src->levels[blit_info->src.level].clear_value);
> +
> +      source_ts_valid = true;
>     } else {
>        etna_set_state(ctx->stream, VIVS_TS_MEM_CONFIG, ts_mem_config);
>     }
> @@ -593,6 +596,7 @@ etna_try_rs_blit(struct pipe_context *pctx,
>        .source_stride = src_lev->stride,
>        .source_padded_width = src_lev->padded_width,
>        .source_padded_height = src_lev->padded_height,
> +      .source_ts_valid = source_ts_valid,
>        .dest_format = translate_rs_format(dst_format),
>        .dest_tiling = dst->layout,
>        .dest = dst->bo,
> diff --git a/src/gallium/drivers/etnaviv/etnaviv_emit.c b/src/gallium/drivers/etnaviv/etnaviv_emit.c
> index 707b1e7..5397aa3 100644
> --- a/src/gallium/drivers/etnaviv/etnaviv_emit.c
> +++ b/src/gallium/drivers/etnaviv/etnaviv_emit.c
> @@ -171,6 +171,10 @@ etna_submit_rs_state(struct etna_context *ctx,
>     struct etna_cmd_stream *stream = ctx->stream;
>     struct etna_coalesce coalesce;
>  
> +   if (cs->RS_KICKER_INPLACE && !cs->source_ts_valid)
> +      /* Inplace resolve is no-op if TS is not configured */
> +      return;
> +
>     ctx->stats.rs_operations++;
>  
>     if (cs->RS_KICKER_INPLACE) {
> diff --git a/src/gallium/drivers/etnaviv/etnaviv_rs.c b/src/gallium/drivers/etnaviv/etnaviv_rs.c
> index c9072c2..60c2c39 100644
> --- a/src/gallium/drivers/etnaviv/etnaviv_rs.c
> +++ b/src/gallium/drivers/etnaviv/etnaviv_rs.c
> @@ -133,6 +133,7 @@ etna_compile_rs_state(struct etna_context *ctx, struct compiled_rs_state *cs,
>        /* Total number of tiles (same as for autodisable) */
>        cs->RS_KICKER_INPLACE = rs->source_padded_width * rs->source_padded_height / 16;
>     }
> +   cs->source_ts_valid = rs->source_ts_valid;
>  }
>  
>  void
> diff --git a/src/gallium/drivers/etnaviv/etnaviv_rs.h b/src/gallium/drivers/etnaviv/etnaviv_rs.h
> index 171d3fa..41a5960 100644
> --- a/src/gallium/drivers/etnaviv/etnaviv_rs.h
> +++ b/src/gallium/drivers/etnaviv/etnaviv_rs.h
> @@ -33,6 +33,7 @@
>  struct rs_state {
>     uint8_t downsample_x : 1; /* Downsample in x direction */
>     uint8_t downsample_y : 1; /* Downsample in y direction */
> +   uint8_t source_ts_valid : 1;
>  
>     uint8_t source_format; /* RS_FORMAT_XXX */
>     uint8_t source_tiling; /* ETNA_LAYOUT_XXX */
> @@ -61,6 +62,7 @@ struct rs_state {
>  
>  /* treat this as opaque structure */
>  struct compiled_rs_state {
> +   uint8_t source_ts_valid : 1;
>     uint32_t RS_CONFIG;
>     uint32_t RS_SOURCE_STRIDE;
>     uint32_t RS_DEST_STRIDE;