[PATCH 2/2] etnaviv: rework TS enable to be a derived state

[Lucas Stach]

Draw operations should not use the TS if the TS buffer content is invalid,
as this leads to wrong rendering or even GPU hangs. As the TS valid status
can change between draws (clear operations changing it to valid, blits using
the RS to the color or ZS buffer changing it to invalid), the TS_MEM_CONFIG
must be updated before each draw if the status has changed.

This fixes the remaining TS related piglit failures (regressions of a
standard run against a piglit run with TS completely disabled).

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 src/gallium/drivers/etnaviv/etnaviv_clear_blit.c |  5 +--
 src/gallium/drivers/etnaviv/etnaviv_context.h    |  1 +
 src/gallium/drivers/etnaviv/etnaviv_state.c      | 42 ++++++++++++++++++++++--
 3 files changed, 43 insertions(+), 5 deletions(-)

diff --git a/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c b/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
index c62287b1339a..7b3fc1822ba5 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_clear_blit.c
@@ -130,7 +130,7 @@ etna_blit_clear_color(struct pipe_context *pctx, struct pipe_surface *dst,
       }
 
       surf->level->ts_valid = true;
-      ctx->dirty |= ETNA_DIRTY_TS;
+      ctx->dirty |= ETNA_DIRTY_TS | ETNA_DIRTY_DERIVE_TS;
    } else if (unlikely(new_clear_value != surf->level->clear_value)) { /* Queue normal RS clear for non-TS surfaces */
       /* If clear color changed, re-generate stored command */
       etna_rs_gen_clear_surface(ctx, surf, new_clear_value);
@@ -189,7 +189,7 @@ etna_blit_clear_zs(struct pipe_context *pctx, struct pipe_surface *dst,
       }
 
       surf->level->ts_valid = true;
-      ctx->dirty |= ETNA_DIRTY_TS;
+      ctx->dirty |= ETNA_DIRTY_TS | ETNA_DIRTY_DERIVE_TS;
    } else {
       if (unlikely(new_clear_value != surf->level->clear_value)) { /* Queue normal RS clear for non-TS surfaces */
          /* If clear depth value changed, re-generate stored command */
@@ -612,6 +612,7 @@ etna_try_rs_blit(struct pipe_context *pctx,
    resource_written(ctx, &dst->base);
    dst->seqno++;
    dst->levels[blit_info->dst.level].ts_valid = false;
+   ctx->dirty |= ETNA_DIRTY_DERIVE_TS;
 
    return TRUE;
 
diff --git a/src/gallium/drivers/etnaviv/etnaviv_context.h b/src/gallium/drivers/etnaviv/etnaviv_context.h
index 2c9b24dfd439..bf2b265f5ee4 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_context.h
+++ b/src/gallium/drivers/etnaviv/etnaviv_context.h
@@ -124,6 +124,7 @@ struct etna_context {
       ETNA_DIRTY_SHADER          = (1 << 16),
       ETNA_DIRTY_TS              = (1 << 17),
       ETNA_DIRTY_TEXTURE_CACHES  = (1 << 18),
+      ETNA_DIRTY_DERIVE_TS       = (1 << 19),
    } dirty;
 
    uint32_t prim_hwsupport;
diff --git a/src/gallium/drivers/etnaviv/etnaviv_state.c b/src/gallium/drivers/etnaviv/etnaviv_state.c
index fc3d9f108fac..34bcb1906991 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_state.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_state.c
@@ -165,7 +165,6 @@ etna_set_framebuffer_state(struct pipe_context *pctx,
       cs->PE_COLOR_STRIDE = cbuf->surf.stride;
 
       if (cbuf->surf.ts_size) {
-         ts_mem_config |= VIVS_TS_MEM_CONFIG_COLOR_FAST_CLEAR;
          cs->TS_COLOR_CLEAR_VALUE = cbuf->level->clear_value;
 
          cs->TS_COLOR_STATUS_BASE = cbuf->ts_reloc;
@@ -231,7 +230,6 @@ etna_set_framebuffer_state(struct pipe_context *pctx,
       cs->PE_DEPTH_NORMALIZE = fui(exp2f(depth_bits) - 1.0f);
 
       if (zsbuf->surf.ts_size) {
-         ts_mem_config |= VIVS_TS_MEM_CONFIG_DEPTH_FAST_CLEAR;
          cs->TS_DEPTH_CLEAR_VALUE = zsbuf->level->clear_value;
 
          cs->TS_DEPTH_STATUS_BASE = zsbuf->ts_reloc;
@@ -325,7 +323,7 @@ etna_set_framebuffer_state(struct pipe_context *pctx,
    cs->PE_LOGIC_OP = VIVS_PE_LOGIC_OP_SINGLE_BUFFER(ctx->specs.single_buffer ? 2 : 0);
 
    ctx->framebuffer_s = *sv; /* keep copy of original structure */
-   ctx->dirty |= ETNA_DIRTY_FRAMEBUFFER;
+   ctx->dirty |= ETNA_DIRTY_FRAMEBUFFER | ETNA_DIRTY_DERIVE_TS;
 }
 
 static void
@@ -572,6 +570,41 @@ etna_vertex_elements_state_bind(struct pipe_context *pctx, void *ve)
    ctx->dirty |= ETNA_DIRTY_VERTEX_ELEMENTS;
 }
 
+static bool
+etna_update_ts_config(struct etna_context *ctx)
+{
+   uint32_t new_ts_config = ctx->framebuffer.TS_MEM_CONFIG;
+
+   if (ctx->framebuffer_s.nr_cbufs > 0) {
+      struct etna_surface *c_surf = etna_surface(ctx->framebuffer_s.cbufs[0]);
+
+      if(c_surf->level->ts_size && c_surf->level->ts_valid) {
+         new_ts_config |= VIVS_TS_MEM_CONFIG_COLOR_FAST_CLEAR;
+      } else {
+         new_ts_config &= ~VIVS_TS_MEM_CONFIG_COLOR_FAST_CLEAR;
+      }
+   }
+
+   if (ctx->framebuffer_s.zsbuf) {
+      struct etna_surface *zs_surf = etna_surface(ctx->framebuffer_s.zsbuf);
+
+      if(zs_surf->level->ts_size && zs_surf->level->ts_valid) {
+         new_ts_config |= VIVS_TS_MEM_CONFIG_DEPTH_FAST_CLEAR;
+      } else {
+         new_ts_config &= ~VIVS_TS_MEM_CONFIG_DEPTH_FAST_CLEAR;
+      }
+   }
+
+   if (new_ts_config != ctx->framebuffer.TS_MEM_CONFIG) {
+      ctx->framebuffer.TS_MEM_CONFIG = new_ts_config;
+      ctx->dirty |= ETNA_DIRTY_TS;
+   }
+
+   ctx->dirty &= ~ETNA_DIRTY_DERIVE_TS;
+
+   return true;
+}
+
 struct etna_state_updater {
    bool (*update)(struct etna_context *ctx);
    uint32_t dirty;
@@ -589,6 +622,9 @@ static const struct etna_state_updater etna_state_updates[] = {
    },
    {
       etna_update_blend_color, ETNA_DIRTY_BLEND_COLOR | ETNA_DIRTY_FRAMEBUFFER,
+   },
+   {
+      etna_update_ts_config, ETNA_DIRTY_DERIVE_TS,
    }
 };
 
-- 
2.11.0