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radeonsi: don't use fast color clear for small surfaces

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This removes 35+ clear eliminate passes from DOTA 2.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2017-11-25 20:16:02 +01:00
parent 8a58724ac9
commit 175ee084ff
1 changed files with 17 additions and 0 deletions
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17
src/gallium/drivers/radeonsi/si_clear.c
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@ -421,6 +421,17 @@ static void si_do_fast_color_clear(struct si_context *sctx,
bool need_decompress_pass = false;
/* Use a slow clear for small surfaces where the cost of
* the eliminate pass can be higher than the benefit of fast
* clear. The closed driver does this, but the numbers may differ.
*
* Always use fast clear on APUs.
*/
bool too_small = sctx->screen->b.info.has_dedicated_vram &&
tex->resource.b.b.nr_samples <= 1 &&
tex->resource.b.b.width0 <= 256 &&
tex->resource.b.b.height0 <= 256;
/* Try to clear DCC first, otherwise try CMASK. */
if (vi_dcc_enabled(tex, 0)) {
uint32_t reset_value;
@ -439,6 +450,9 @@ static void si_do_fast_color_clear(struct si_context *sctx,
&clear_words_needed))
continue;
if (clear_words_needed && too_small)
continue;
/* DCC fast clear with MSAA should clear CMASK to 0xC. */
if (tex->resource.b.b.nr_samples >= 2 && tex->cmask.size) {
/* TODO: This doesn't work with MSAA. */
@ -458,6 +472,9 @@ static void si_do_fast_color_clear(struct si_context *sctx,
tex->separate_dcc_dirty = true;
} else {
if (too_small)
continue;
/* 128-bit formats are unusupported */
if (tex->surface.bpe > 8) {
continue;