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panfrost: Split out allow_fpk helper 

For sharing between Bifrost's renderer state descriptor and Valhall's draw call
descriptor, which require the same logic in different places.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15797>
This commit is contained in:
Alyssa Rosenzweig 2022-04-07 10:28:44 -04:00 committed by Marge Bot
parent ba395fc94c
commit 270e3e02f2
1 changed files with 18 additions and 10 deletions
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28
src/gallium/drivers/panfrost/pan_cmdstream.c
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@ -430,6 +430,23 @@ panfrost_emit_blend(struct panfrost_batch *batch, void *rts, mali_ptr *blend_sha
}
#endif
static inline bool
pan_allow_forward_pixel_to_kill(struct panfrost_context *ctx, struct panfrost_shader_state *fs)
{
/* Track if any colour buffer is reused across draws, either
* from reading it directly, or from failing to write it
*/
unsigned rt_mask = ctx->fb_rt_mask;
uint64_t rt_written = (fs->info.outputs_written >> FRAG_RESULT_DATA0);
bool blend_reads_dest = (ctx->blend->load_dest_mask & rt_mask);
bool alpha_to_coverage = ctx->blend->base.alpha_to_coverage;
return fs->info.fs.can_fpk &&
!(rt_mask & ~rt_written) &&
!alpha_to_coverage &&
!blend_reads_dest;
}
/* Construct a partial RSD corresponding to no executed fragment shader, and
* merge with the existing partial RSD. */
@ -477,17 +494,8 @@ panfrost_prepare_fs_state(struct panfrost_context *ctx,
pan_pack(rsd, RENDERER_STATE, cfg) {
if (panfrost_fs_required(fs, so, &ctx->pipe_framebuffer, zsa)) {
#if PAN_ARCH >= 6
/* Track if any colour buffer is reused across draws, either
* from reading it directly, or from failing to write it */
unsigned rt_mask = ctx->fb_rt_mask;
uint64_t rt_written = (fs->info.outputs_written >> FRAG_RESULT_DATA0);
bool blend_reads_dest = (so->load_dest_mask & rt_mask);
cfg.properties.allow_forward_pixel_to_kill =
fs->info.fs.can_fpk &&
!(rt_mask & ~rt_written) &&
!alpha_to_coverage &&
!blend_reads_dest;
pan_allow_forward_pixel_to_kill(ctx, fs);
#else
cfg.properties.force_early_z =
fs->info.fs.can_early_z && !alpha_to_coverage &&