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authorRob Clark <robclark@freedesktop.org>2014-03-05 11:29:45 -0500
committerRob Clark <robclark@freedesktop.org>2014-03-05 12:37:21 -0500
commit4de1e5eddcb76e377cffbb7f3bd87a88a575dae2 (patch)
treea7a9a3eed3f936e2a5a3c7f26987d4e3375b9cf4
parent12d55d5f19368de7697f2e6df7d4ff98929112b1 (diff)
WIP: freedreno/a3xx: incorrect scissor for binning pass
If scissor optimization is used (to avoid bringing scissored portions of the render target into GMEM and then back out to system memory) in combination with hw binning pass, the result would be a scissor mismatch between binning pass and rendering pass. This would cause rendering bugs in some scenarios with (for example) gnome-shell. I would have expected that simply using the correct screen-scissor during the binning pass would be enough, but seems like there is something else missing. So for now disable binning pass if scissor optimization is used.
-rw-r--r--src/gallium/drivers/freedreno/a3xx/fd3_gmem.c40
-rw-r--r--src/gallium/drivers/freedreno/freedreno_gmem.c2
-rw-r--r--src/gallium/drivers/freedreno/freedreno_gmem.h1
3 files changed, 35 insertions, 8 deletions
diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_gmem.c b/src/gallium/drivers/freedreno/a3xx/fd3_gmem.c
index dde71ba97b9..72fe6f766f8 100644
--- a/src/gallium/drivers/freedreno/a3xx/fd3_gmem.c
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_gmem.c
@@ -115,6 +115,24 @@ static bool
use_hw_binning(struct fd_context *ctx)
{
struct fd_gmem_stateobj *gmem = &ctx->gmem;
+
+ /* workaround: combining scissor optimization and hw binning
+ * seems problematic. Seems like we end up with a mismatch
+ * between binning pass and rendering pass, wrt. where the hw
+ * thinks the vertices belong. And the blob driver doesn't
+ * seem to implement anything like scissor optimization, so
+ * not entirely sure what I might be missing.
+ *
+ * But scissor optimization is mainly for window managers,
+ * which don't have many vertices (and therefore doesn't
+ * benefit much from binning pass).
+ *
+ * So for now just disable binning if scissor optimization is
+ * used.
+ */
+ if (gmem->minx || gmem->miny)
+ return false;
+
return fd_binning_enabled && ((gmem->nbins_x * gmem->nbins_y) > 2);
}
@@ -644,10 +662,16 @@ update_vsc_pipe(struct fd_context *ctx)
static void
emit_binning_pass(struct fd_context *ctx)
{
+ struct fd_gmem_stateobj *gmem = &ctx->gmem;
struct pipe_framebuffer_state *pfb = &ctx->framebuffer;
struct fd_ringbuffer *ring = ctx->ring;
int i;
+ uint32_t x1 = gmem->minx;
+ uint32_t y1 = gmem->miny;
+ uint32_t x2 = gmem->minx + gmem->width - 1;
+ uint32_t y2 = gmem->miny + gmem->height - 1;
+
if (ctx->screen->gpu_id == 320) {
emit_binning_workaround(ctx);
@@ -670,21 +694,21 @@ emit_binning_pass(struct fd_context *ctx)
OUT_PKT0(ring, REG_A3XX_RB_RENDER_CONTROL, 1);
OUT_RING(ring, A3XX_RB_RENDER_CONTROL_ALPHA_TEST_FUNC(FUNC_NEVER) |
A3XX_RB_RENDER_CONTROL_DISABLE_COLOR_PIPE |
- A3XX_RB_RENDER_CONTROL_BIN_WIDTH(ctx->gmem.bin_w));
+ A3XX_RB_RENDER_CONTROL_BIN_WIDTH(gmem->bin_w));
/* setup scissor/offset for whole screen: */
OUT_PKT0(ring, REG_A3XX_RB_WINDOW_OFFSET, 1);
- OUT_RING(ring, A3XX_RB_WINDOW_OFFSET_X(0) |
- A3XX_RB_WINDOW_OFFSET_Y(0));
+ OUT_RING(ring, A3XX_RB_WINDOW_OFFSET_X(x1) |
+ A3XX_RB_WINDOW_OFFSET_Y(y1));
OUT_PKT0(ring, REG_A3XX_RB_LRZ_VSC_CONTROL, 1);
OUT_RING(ring, A3XX_RB_LRZ_VSC_CONTROL_BINNING_ENABLE);
OUT_PKT0(ring, REG_A3XX_GRAS_SC_SCREEN_SCISSOR_TL, 2);
- OUT_RING(ring, A3XX_GRAS_SC_SCREEN_SCISSOR_TL_X(0) |
- A3XX_GRAS_SC_SCREEN_SCISSOR_TL_Y(0));
- OUT_RING(ring, A3XX_GRAS_SC_SCREEN_SCISSOR_BR_X(pfb->width - 1) |
- A3XX_GRAS_SC_SCREEN_SCISSOR_BR_Y(pfb->height - 1));
+ OUT_RING(ring, A3XX_GRAS_SC_SCREEN_SCISSOR_TL_X(x1) |
+ A3XX_GRAS_SC_SCREEN_SCISSOR_TL_Y(y1));
+ OUT_RING(ring, A3XX_GRAS_SC_SCREEN_SCISSOR_BR_X(x2) |
+ A3XX_GRAS_SC_SCREEN_SCISSOR_BR_Y(y2));
OUT_PKT0(ring, REG_A3XX_RB_MODE_CONTROL, 1);
OUT_RING(ring, A3XX_RB_MODE_CONTROL_RENDER_MODE(RB_TILING_PASS) |
@@ -731,7 +755,7 @@ emit_binning_pass(struct fd_context *ctx)
A3XX_RB_MODE_CONTROL_MARB_CACHE_SPLIT_MODE);
OUT_RING(ring, A3XX_RB_RENDER_CONTROL_ENABLE_GMEM |
A3XX_RB_RENDER_CONTROL_ALPHA_TEST_FUNC(FUNC_NEVER) |
- A3XX_RB_RENDER_CONTROL_BIN_WIDTH(ctx->gmem.bin_w));
+ A3XX_RB_RENDER_CONTROL_BIN_WIDTH(gmem->bin_w));
OUT_PKT3(ring, CP_EVENT_WRITE, 1);
OUT_RING(ring, CACHE_FLUSH);
diff --git a/src/gallium/drivers/freedreno/freedreno_gmem.c b/src/gallium/drivers/freedreno/freedreno_gmem.c
index 80cf7c89c6f..2d4de442452 100644
--- a/src/gallium/drivers/freedreno/freedreno_gmem.c
+++ b/src/gallium/drivers/freedreno/freedreno_gmem.c
@@ -143,6 +143,8 @@ calculate_tiles(struct fd_context *ctx)
gmem->bin_w = bin_w;
gmem->nbins_x = nbins_x;
gmem->nbins_y = nbins_y;
+ gmem->minx = minx;
+ gmem->miny = miny;
gmem->width = width;
gmem->height = height;
diff --git a/src/gallium/drivers/freedreno/freedreno_gmem.h b/src/gallium/drivers/freedreno/freedreno_gmem.h
index b52557c952b..c7c687419b4 100644
--- a/src/gallium/drivers/freedreno/freedreno_gmem.h
+++ b/src/gallium/drivers/freedreno/freedreno_gmem.h
@@ -50,6 +50,7 @@ struct fd_gmem_stateobj {
uint cpp;
uint16_t bin_h, nbins_y;
uint16_t bin_w, nbins_x;
+ uint16_t minx, miny;
uint16_t width, height;
bool has_zs; /* gmem config using depth/stencil? */
};