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drm/amd/display: fix dcn315 single stream crb allocation 

Change to improve avoiding asymetric crb calculations for single stream
scenarios.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Dmytro Laktyushkin <dmytro.laktyushkin@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dmytro Laktyushkin 2023-05-16 15:50:40 -04:00 committed by Alex Deucher
parent 869bcf59fd
commit 49f26218c3
1 changed files with 12 additions and 3 deletions
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15
drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
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@ -1628,6 +1628,10 @@ static bool allow_pixel_rate_crb(struct dc *dc, struct dc_state *context)
int i;
struct resource_context *res_ctx = &context->res_ctx;
/*Don't apply for single stream*/
if (context->stream_count < 2)
return false;
for (i = 0; i < dc->res_pool->pipe_count; i++) {
if (!res_ctx->pipe_ctx[i].stream)
continue;
@ -1727,19 +1731,23 @@ static int dcn315_populate_dml_pipes_from_context(
pipe_cnt++;
}
/* Spread remaining unreserved crb evenly among all pipes, use default policy if not enough det or single pipe */
/* Spread remaining unreserved crb evenly among all pipes*/
if (pixel_rate_crb) {
for (i = 0, pipe_cnt = 0, crb_idx = 0; i < dc->res_pool->pipe_count; i++) {
pipe = &res_ctx->pipe_ctx[i];
if (!pipe->stream)
continue;
/* Do not use asymetric crb if not enough for pstate support */
if (remaining_det_segs < 0) {
pipes[pipe_cnt].pipe.src.det_size_override = 0;
continue;
}
if (!pipe->top_pipe && !pipe->prev_odm_pipe) {
bool split_required = pipe->stream->timing.pix_clk_100hz >= dcn_get_max_non_odm_pix_rate_100hz(&dc->dml.soc)
|| (pipe->plane_state && pipe->plane_state->src_rect.width > 5120);
if (remaining_det_segs < 0 || crb_pipes == 1)
pipes[pipe_cnt].pipe.src.det_size_override = 0;
if (remaining_det_segs > MIN_RESERVED_DET_SEGS)
pipes[pipe_cnt].pipe.src.det_size_override += (remaining_det_segs - MIN_RESERVED_DET_SEGS) / crb_pipes +
(crb_idx < (remaining_det_segs - MIN_RESERVED_DET_SEGS) % crb_pipes ? 1 : 0);
@ -1755,6 +1763,7 @@ static int dcn315_populate_dml_pipes_from_context(
}
/* Convert segments into size for DML use */
pipes[pipe_cnt].pipe.src.det_size_override *= DCN3_15_CRB_SEGMENT_SIZE_KB;
crb_idx++;
}
pipe_cnt++;