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panfrost: Streamline the !fs_required case

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Takes some complexity out of the per-draw path.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10869>
This commit is contained in:
Alyssa Rosenzweig
2021-05-14 19:12:00 -04:00
committed by Marge Bot
parent 00e3705f60
commit 997c1c84f3
1 changed files with 32 additions and 12 deletions
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44
src/gallium/drivers/panfrost/pan_cmdstream.c
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@@ -456,6 +456,34 @@ panfrost_emit_blend(struct panfrost_batch *batch, void *rts, mali_ptr *blend_sha
}
}
/* Construct a partial RSD corresponding to no executed fragment shader, and
* merge with the existing partial RSD. This depends only on the architecture,
* so packing separately allows the packs to be constant folded away. */
static void
pan_merge_empty_fs(struct mali_renderer_state_packed *rsd, bool is_bifrost)
{
struct mali_renderer_state_packed empty_rsd;
if (is_bifrost) {
pan_pack(&empty_rsd, RENDERER_STATE, cfg) {
cfg.properties.bifrost.shader_modifies_coverage = true;
cfg.properties.bifrost.allow_forward_pixel_to_kill = true;
cfg.properties.bifrost.allow_forward_pixel_to_be_killed = true;
cfg.properties.bifrost.zs_update_operation = MALI_PIXEL_KILL_STRONG_EARLY;
}
} else {
pan_pack(&empty_rsd, RENDERER_STATE, cfg) {
cfg.shader.shader = 0x1;
cfg.properties.midgard.work_register_count = 1;
cfg.properties.depth_source = MALI_DEPTH_SOURCE_FIXED_FUNCTION;
cfg.properties.midgard.force_early_z = true;
}
}
pan_merge((*rsd), empty_rsd, RENDERER_STATE);
}
static void
panfrost_prepare_bifrost_fs_state(struct panfrost_context *ctx,
struct MALI_RENDERER_STATE *state)
@@ -464,12 +492,7 @@ panfrost_prepare_bifrost_fs_state(struct panfrost_context *ctx,
struct panfrost_blend_state *so = ctx->blend;
bool alpha_to_coverage = so->base.alpha_to_coverage;
if (!panfrost_fs_required(fs, so, &ctx->pipe_framebuffer)) {
state->properties.bifrost.shader_modifies_coverage = true;
state->properties.bifrost.allow_forward_pixel_to_kill = true;
state->properties.bifrost.allow_forward_pixel_to_be_killed = true;
state->properties.bifrost.zs_update_operation = MALI_PIXEL_KILL_STRONG_EARLY;
} else {
if (panfrost_fs_required(fs, so, &ctx->pipe_framebuffer)) {
/* Track if any colour buffer is reused across draws, either
* from reading it directly, or from failing to write it */
bool blend_reads_dest = false;
@@ -508,12 +531,7 @@ panfrost_prepare_midgard_fs_state(struct panfrost_context *ctx,
unsigned rt_count = ctx->pipe_framebuffer.nr_cbufs;
bool alpha_to_coverage = ctx->blend->base.alpha_to_coverage;
if (!panfrost_fs_required(fs, ctx->blend, &ctx->pipe_framebuffer)) {
state->shader.shader = 0x1;
state->properties.midgard.work_register_count = 1;
state->properties.depth_source = MALI_DEPTH_SOURCE_FIXED_FUNCTION;
state->properties.midgard.force_early_z = true;
} else {
if (panfrost_fs_required(fs, ctx->blend, &ctx->pipe_framebuffer)) {
state->properties.midgard.force_early_z =
fs->info.fs.can_early_z && !alpha_to_coverage &&
((enum mali_func) zsa->base.alpha_func == MALI_FUNC_ALWAYS);
@@ -646,6 +664,8 @@ panfrost_emit_frag_shader(struct panfrost_context *ctx,
/* Merge with CSO state and upload */
if (panfrost_fs_required(fs, ctx->blend, &ctx->pipe_framebuffer))
pan_merge(rsd, fs->partial_rsd, RENDERER_STATE);
else
pan_merge_empty_fs(&rsd, pan_is_bifrost(dev));
/* Word 8, 9 Misc state */
rsd.opaque[8] |= zsa->rsd_depth.opaque[0]