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authorIlia Mirkin <[email protected]>2016-08-20 00:14:43 -0400
committerIlia Mirkin <[email protected]>2016-09-03 19:58:42 -0400
commit83d7230fd5ab69e7e111e3a02e604e65922fb171 (patch)
treef59cb99fa22dc8c808dfb6f20c6032498dc6b1b4 /src/gallium/drivers/freedreno/a3xx
parentdac72234c74b8cf4da516b915ed03efd8e2f9922 (diff)
a3xx: make use of software clipping when hw can't handle it
The hw clipper only handles up to 6 UCPs. If there are more than 6 UCPs, or a clip vertex, or clip distances are in use, then we must use the fallback discard-based clipping from the frag shader. Signed-off-by: Ilia Mirkin <[email protected]> Cc: [email protected]
Diffstat (limited to 'src/gallium/drivers/freedreno/a3xx')
-rw-r--r--src/gallium/drivers/freedreno/a3xx/fd3_draw.c3
-rw-r--r--src/gallium/drivers/freedreno/a3xx/fd3_emit.c12
-rw-r--r--src/gallium/drivers/freedreno/a3xx/fd3_program.c15
-rw-r--r--src/gallium/drivers/freedreno/a3xx/fd3_program.h3
4 files changed, 29 insertions, 4 deletions
diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_draw.c b/src/gallium/drivers/freedreno/a3xx/fd3_draw.c
index a1594b641a4..d26786f6499 100644
--- a/src/gallium/drivers/freedreno/a3xx/fd3_draw.c
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_draw.c
@@ -156,6 +156,9 @@ fd3_draw_vbo(struct fd_context *ctx, const struct pipe_draw_info *info)
.sprite_coord_mode = ctx->rasterizer->sprite_coord_mode,
};
+ if (fd3_needs_manual_clipping(ctx->prog.vp, ctx->rasterizer))
+ emit.key.ucp_enables = ctx->rasterizer->clip_plane_enable;
+
fixup_shader_state(ctx, &emit.key);
unsigned dirty = ctx->dirty;
diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_emit.c b/src/gallium/drivers/freedreno/a3xx/fd3_emit.c
index e66836b43c2..7945184d8f0 100644
--- a/src/gallium/drivers/freedreno/a3xx/fd3_emit.c
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_emit.c
@@ -571,20 +571,24 @@ fd3_emit_state(struct fd_context *ctx, struct fd_ringbuffer *ring,
if (dirty & (FD_DIRTY_RASTERIZER | FD_DIRTY_PROG)) {
uint32_t val = fd3_rasterizer_stateobj(ctx->rasterizer)
->gras_cl_clip_cntl;
+ uint8_t planes = ctx->rasterizer->clip_plane_enable;
val |= COND(fp->writes_pos, A3XX_GRAS_CL_CLIP_CNTL_ZCLIP_DISABLE);
val |= COND(fp->frag_coord, A3XX_GRAS_CL_CLIP_CNTL_ZCOORD |
A3XX_GRAS_CL_CLIP_CNTL_WCOORD);
- /* TODO only use if prog doesn't use clipvertex/clipdist */
- val |= A3XX_GRAS_CL_CLIP_CNTL_NUM_USER_CLIP_PLANES(
- MIN2(util_bitcount(ctx->rasterizer->clip_plane_enable), 6));
+ if (!emit->key.ucp_enables)
+ val |= A3XX_GRAS_CL_CLIP_CNTL_NUM_USER_CLIP_PLANES(
+ MIN2(util_bitcount(planes), 6));
OUT_PKT0(ring, REG_A3XX_GRAS_CL_CLIP_CNTL, 1);
OUT_RING(ring, val);
}
- if (dirty & (FD_DIRTY_RASTERIZER | FD_DIRTY_UCP)) {
+ if (dirty & (FD_DIRTY_RASTERIZER | FD_DIRTY_PROG | FD_DIRTY_UCP)) {
uint32_t planes = ctx->rasterizer->clip_plane_enable;
int count = 0;
+ if (emit->key.ucp_enables)
+ planes = 0;
+
while (planes && count < 6) {
int i = ffs(planes) - 1;
diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_program.c b/src/gallium/drivers/freedreno/a3xx/fd3_program.c
index 485a4da2c1a..3146dc5d062 100644
--- a/src/gallium/drivers/freedreno/a3xx/fd3_program.c
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_program.c
@@ -28,6 +28,7 @@
#include "pipe/p_state.h"
#include "util/u_string.h"
+#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_inlines.h"
#include "util/u_format.h"
@@ -85,6 +86,20 @@ fd3_vp_state_delete(struct pipe_context *pctx, void *hwcso)
delete_shader_stateobj(so);
}
+bool
+fd3_needs_manual_clipping(const struct fd3_shader_stateobj *so,
+ const struct pipe_rasterizer_state *rast)
+{
+ uint64_t outputs = ir3_shader_outputs(so->shader);
+
+ return (!rast->depth_clip ||
+ util_bitcount(rast->clip_plane_enable) > 6 ||
+ outputs & ((1ULL << VARYING_SLOT_CLIP_VERTEX) |
+ (1ULL << VARYING_SLOT_CLIP_DIST0) |
+ (1ULL << VARYING_SLOT_CLIP_DIST1)));
+}
+
+
static void
emit_shader(struct fd_ringbuffer *ring, const struct ir3_shader_variant *so)
{
diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_program.h b/src/gallium/drivers/freedreno/a3xx/fd3_program.h
index b3fcc0c68c9..b95df4cc6b3 100644
--- a/src/gallium/drivers/freedreno/a3xx/fd3_program.h
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_program.h
@@ -44,4 +44,7 @@ void fd3_program_emit(struct fd_ringbuffer *ring, struct fd3_emit *emit,
void fd3_prog_init(struct pipe_context *pctx);
+bool fd3_needs_manual_clipping(const struct fd3_shader_stateobj *,
+ const struct pipe_rasterizer_state *);
+
#endif /* FD3_PROGRAM_H_ */