HiS might be useful for anything that uses id Tech 4, like Doom 3,
ETQW, etc. I'm not sure about later chips, but R300-R500 has to
disable HiZ entirely if certain stencil operations are used.
Marek
On Fri, Dec 13, 2013 at 4:58 PM, Andreas Hartmetz <ahartm...@gmail.com> wrote:
> Also move a comment that was in the wrong place.
> ---
> src/gallium/drivers/radeonsi/si_state.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/src/gallium/drivers/radeonsi/si_state.c
> b/src/gallium/drivers/radeonsi/si_state.c
> index d99cfe8..ee2372f 100644
> --- a/src/gallium/drivers/radeonsi/si_state.c
> +++ b/src/gallium/drivers/radeonsi/si_state.c
> @@ -1751,7 +1751,7 @@ void si_update_db_draw_state(struct r600_context *rctx,
> struct r600_surface *zsb
>
> /* db */
>
> - /* TODO HiS aka stencil buffer htile goes here */
> + /* not using HiS aka stencil buffer htile for now, the benefits are
> unclear */
> db_render_override =
> S_02800C_FORCE_HIS_ENABLE0(V_02800C_FORCE_DISABLE) |
>
> S_02800C_FORCE_HIS_ENABLE1(V_02800C_FORCE_DISABLE);
>
> @@ -1763,6 +1763,7 @@ void si_update_db_draw_state(struct r600_context *rctx,
> struct r600_surface *zsb
> hiz_enable = rtex->htile_buffer && !level;
> }
> if (hiz_enable) {
> + /* Force off means no force, DB_SHADER_CONTROL decides */
> db_render_override |=
> S_02800C_FORCE_HIZ_ENABLE(V_02800C_FORCE_OFF);
> } else {
> db_render_override |=
> S_02800C_FORCE_HIZ_ENABLE(V_02800C_FORCE_DISABLE);
> @@ -1877,7 +1878,8 @@ static void si_db(struct r600_context *rctx, struct
> si_pm4_state *pm4,
> /* use htile only for first level */
> if (rtex->htile_buffer && !level) {
> z_info |= S_028040_TILE_SURFACE_ENABLE(1);
> - /* Force off means no force, DB_SHADER_CONTROL decides */
> + /* we are not using HiS for now, so use more of the buffer
> for HiZ */
> + s_info |= S_028044_TILE_STENCIL_DISABLE(1);
> uint64_t va = r600_resource_va(&rctx->screen->b.b,
> &rtex->htile_buffer->b.b);
> db_htile_data_base = va >> 8;
> db_htile_surface = S_028ABC_FULL_CACHE(1);
> --
> 1.8.3.2
>
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