a20x can only draw 65535 vertices at once. this fix only applies to
triangles.
Signed-off-by: Jonathan Marek <jonat...@marek.ca>
---
src/gallium/drivers/freedreno/a2xx/fd2_draw.c | 30 +++++++++++++++++--
1 file changed, 28 insertions(+), 2 deletions(-)
diff --git a/src/gallium/drivers/freedreno/a2xx/fd2_draw.c
b/src/gallium/drivers/freedreno/a2xx/fd2_draw.c
index 1792505808..7ccbee587f 100644
--- a/src/gallium/drivers/freedreno/a2xx/fd2_draw.c
+++ b/src/gallium/drivers/freedreno/a2xx/fd2_draw.c
@@ -171,8 +171,34 @@ fd2_draw_vbo(struct fd_context *ctx, const struct
pipe_draw_info *pinfo,
fd2_emit_state(ctx, ctx->batch->draw, ctx->dirty);
fd2_emit_state(ctx, ctx->batch->binning, ctx->dirty);
- draw_impl(ctx, pinfo, ctx->batch->draw, index_offset, false);
- draw_impl(ctx, pinfo, ctx->batch->binning, index_offset, true);
+ /* a20x can only draw 65535 vertices at once... */
+ if (is_a20x(ctx->screen) && pinfo->count > 0xffff) {
+ struct pipe_draw_info info = *pinfo;
+ unsigned count = info.count;
+ unsigned num_vertices = ctx->batch->num_vertices;
+
+ /* other primitives require more work
+ * (triangles works because 0xffff is divible by 3)
+ */
+ if (info.mode != PIPE_PRIM_TRIANGLES)
+ return false;
+
+ for (; count; ) {
+ info.count = MIN2(count, 0xffff);
+
+ draw_impl(ctx, &info, ctx->batch->draw, index_offset,
false);
+ draw_impl(ctx, &info, ctx->batch->binning,
index_offset, true);
+
+ info.start += 0xffff;
+ ctx->batch->num_vertices += 0xffff;
+ count -= info.count;
+ }
+ /* changing this value is a hack, restore it */
+ ctx->batch->num_vertices = num_vertices;
+ } else {
+ draw_impl(ctx, pinfo, ctx->batch->draw, index_offset, false);
+ draw_impl(ctx, pinfo, ctx->batch->binning, index_offset, true);
+ }
fd_context_all_clean(ctx);
--
2.17.1
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