On Wed, Jun 24, 2015 at 8:07 PM, Ben Widawsky
<benjamin.widaw...@intel.com> wrote:
> gen8 had some special restrictions which don't seem to carry over to gen9.
> Quoting the spec for SKL:
> "The Z_Height and Z_Width values must equal those present in
> 3DSTATE_DEPTH_BUFFER incremented by one."
>
> This fixes nothing in piglit (and regresses nothing).
>
> Cc: Jordan Justen <jordan.l.jus...@intel.com>
> Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
> ---
> src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 32
> ++++++++++++++-------------
> 1 file changed, 17 insertions(+), 15 deletions(-)
>
> diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> index 6aa969a..432a47c 100644
> --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> @@ -1550,21 +1550,23 @@ intel_gen8_hiz_buf_create(struct brw_context *brw,
> /* Gen7 PRM Volume 2, Part 1, 11.5.3 "Hierarchical Depth Buffer" documents
> * adjustments required for Z_Height and Z_Width based on multisampling.
> */
> - switch (mt->num_samples) {
> - case 0:
> - case 1:
> - break;
> - case 2:
> - case 4:
> - z_width *= 2;
> - z_height *= 2;
> - break;
> - case 8:
> - z_width *= 4;
> - z_height *= 2;
> - break;
> - default:
> - unreachable("unsupported sample count");
> + if (brw->gen < 9) {
> + switch (mt->num_samples) {
> + case 0:
> + case 1:
> + break;
> + case 2:
> + case 4:
> + z_width *= 2;
> + z_height *= 2;
> + break;
> + case 8:
> + z_width *= 4;
> + z_height *= 2;
> + break;
> + default:
> + unreachable("unsupported sample count");
> + }
> }
>
> const unsigned vertical_align = 8; /* 'j' in the docs */
> --
> 2.4.4
>
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Reviewed-by: Anuj Phogat <anuj.pho...@gmail.com>
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