From 6ded75ed08aed8a88b638c664efbfe14e0476f37 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Wed, 21 May 2014 14:31:31 -0700 Subject: [PATCH] i965/gen6: Add a spec citation about push constant packet requirements. Reviewed-by: Kenneth Graunke --- src/mesa/drivers/dri/i965/gen6_wm_state.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/gen6_wm_state.c b/src/mesa/drivers/dri/i965/gen6_wm_state.c index db0e3aa..047e036 100644 --- a/src/mesa/drivers/dri/i965/gen6_wm_state.c +++ b/src/mesa/drivers/dri/i965/gen6_wm_state.c @@ -76,7 +76,14 @@ upload_wm_state(struct brw_context *brw) /* _NEW_BUFFERS */ bool multisampled_fbo = ctx->DrawBuffer->Visual.samples > 1; - /* CACHE_NEW_WM_PROG */ + /* CACHE_NEW_WM_PROG + * + * We can't fold this into gen6_upload_wm_push_constants(), because + * according to the SNB PRM, vol 2 part 1 section 7.2.2 + * (3DSTATE_CONSTANT_PS [DevSNB]): + * + * "[DevSNB]: This packet must be followed by WM_STATE." + */ if (brw->wm.prog_data->base.nr_params == 0) { /* Disable the push constant buffers. */ BEGIN_BATCH(5); -- 2.7.4