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

[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".

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;
-- 
2.7.4