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radv: Don't toggle PC oversubscription for NGG culling.

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We are going to add this directly to the pipeline.
If a pipeline has such a shader, NGG culling is turned on
most of the time, so it's not useful to toggle this setting.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11905>
This commit is contained in:
Timur Kristóf 2021-07-15 11:51:32 +02:00 • committed by Marge Bot
parent 448592b9ae
commit 61eb3debcf
1 changed files with 1 additions and 14 deletions
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15
src/amd/vulkan/radv_cmd_buffer.c
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@ -5845,17 +5845,9 @@ radv_emit_ngg_culling_state(struct radv_cmd_buffer *cmd_buffer, const struct rad
* but not when it stays on and just some settings change.
*/
if (!!cmd_buffer->state.last_nggc_settings != !!nggc_settings) {
const struct radv_physical_device *physical_device = cmd_buffer->device->physical_device;
uint32_t rsrc2 = v->config.rsrc2;
uint32_t oversub_pc_lines = physical_device->rad_info.pc_lines / 4;
if (nggc_settings) {
/* Tweak the parameter cache oversubscription.
* This allows the HW to launch more NGG workgroups than the pre-allocated parameter
* cache would normally allow, yielding better perf when culling is on.
*/
oversub_pc_lines = physical_device->rad_info.pc_lines * 3 / 4;
} else {
if (!nggc_settings) {
/* Allocate less LDS when culling is disabled. (But GS always needs it.) */
if (stage != MESA_SHADER_GEOMETRY)
rsrc2 = (rsrc2 & C_00B22C_LDS_SIZE) | S_00B22C_LDS_SIZE(v->info.num_lds_blocks_when_not_culling);
@ -5865,11 +5857,6 @@ radv_emit_ngg_culling_state(struct radv_cmd_buffer *cmd_buffer, const struct rad
if (!(cmd_buffer->state.dirty & RADV_CMD_DIRTY_PIPELINE)) {
radeon_set_sh_reg(cmd_buffer->cs, R_00B22C_SPI_SHADER_PGM_RSRC2_GS, rsrc2);
}
/* Update parameter cache oversubscription setting. */
radeon_set_uconfig_reg(cmd_buffer->cs, R_030980_GE_PC_ALLOC,
S_030980_OVERSUB_EN(physical_device->rad_info.use_late_alloc) |
S_030980_NUM_PC_LINES(oversub_pc_lines - 1));
}
cmd_buffer->state.last_nggc_settings = nggc_settings;