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r300: disable zmask clears for large surfaces

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(cherry picked from commit 3fc2627897)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40752>
This commit is contained in:
Pavel Ondračka 2026-02-23 13:07:56 +01:00 • committed by Eric Engestrom
parent 27fec03660
commit 8292cf5563
2 changed files with 15 additions and 2 deletions
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2
.pick_status.json
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@ -674,7 +674,7 @@
"description": "r300: disable zmask clears for large surfaces",
"nominated": false,
"nomination_type": 0,
"resolution": 4,
"resolution": 1,
"main_sha": null,
"because_sha": null,
"notes": null

15
src/gallium/drivers/r300/r300_blit.c
View file

@ -134,8 +134,21 @@ static bool r300_fast_zclear_allowed(struct r300_context *r300,
{
struct pipe_framebuffer_state *fb =
(struct pipe_framebuffer_state*)r300->fb_state.state;
struct r300_resource *tex = r300_resource(fb->zsbuf.texture);
unsigned zmask_dwords = tex->tex.zmask_dwords[fb->zsbuf.level];
return r300_resource(fb->zsbuf.texture)->tex.zmask_dwords[fb->zsbuf.level] != 0;
if (!zmask_dwords)
return false;
/* On tested RV530, 3D_CLEAR_ZMASK does not work above 0x1400. Avoid fast Z
* clear in that range and fall back to normal depth clear.
*
* FIXME: Validate whether pre-R5xx families need a similar guard and/or
* a different threshold. */
if (r300->screen->caps.is_r500 && zmask_dwords > 0x1400)
return false;
return true;
}
static bool r300_hiz_clear_allowed(struct r300_context *r300)