[PATCH 12/20] drm/amd/display: Block SubVP + DRR if the DRR is PSR capable

[Stylon Wang]

From: Alvin Lee <alvin.lee2 at amd.com>

[Description]
PSR implementation in FW has inline polling which can poll for up
to 1ms. This will interfere with SubVP because SubVP is timing
sensitive and can't tolerate up to 1ms worth of delay before
handling vertical or VLINE interrupts. Therefore block SubVP + DRR
cases if DRR is PSR capable

Acked-by: Stylon Wang <stylon.wang at amd.com>
Signed-off-by: Alvin Lee <alvin.lee2 at amd.com>
Reviewed-by: Saaem Rizvi <SyedSaaem.Rizvi at amd.com>
---
 .../drm/amd/display/dc/dcn32/dcn32_resource_helpers.c  | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
index 578070e7d44b..7eec39576e2c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
@@ -672,6 +672,7 @@ bool dcn32_check_native_scaling_for_res(struct pipe_ctx *pipe, unsigned int widt
  * - Config must have 2 displays (i.e., 2 non-phantom master pipes)
  * - One display is SubVP
  * - Other display must have Freesync enabled
+ * - The potential DRR display must not be PSR capable
  *
  * @return: True if admissible, false otherwise
  *
@@ -684,6 +685,7 @@ bool dcn32_subvp_drr_admissable(struct dc *dc, struct dc_state *context)
 	uint8_t subvp_count = 0;
 	uint8_t non_subvp_pipes = 0;
 	bool drr_pipe_found = false;
+	bool drr_psr_capable = false;
 
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
@@ -696,6 +698,7 @@ bool dcn32_subvp_drr_admissable(struct dc *dc, struct dc_state *context)
 				subvp_count++;
 			if (pipe->stream->mall_stream_config.type == SUBVP_NONE) {
 				non_subvp_pipes++;
+				drr_psr_capable = (drr_psr_capable || dcn32_is_psr_capable(pipe));
 				if (pipe->stream->ignore_msa_timing_param &&
 						(pipe->stream->allow_freesync || pipe->stream->vrr_active_variable)) {
 					drr_pipe_found = true;
@@ -704,7 +707,7 @@ bool dcn32_subvp_drr_admissable(struct dc *dc, struct dc_state *context)
 		}
 	}
 
-	if (subvp_count == 1 && non_subvp_pipes == 1 && drr_pipe_found)
+	if (subvp_count == 1 && non_subvp_pipes == 1 && drr_pipe_found && !drr_psr_capable)
 		result = true;
 
 	return result;
@@ -722,6 +725,7 @@ bool dcn32_subvp_drr_admissable(struct dc *dc, struct dc_state *context)
  * - One display is SubVP
  * - Other display must not have Freesync capability
  * - DML must have output DRAM clock change support as SubVP + Vblank
+ * - The potential vblank display must not be PSR capable
  *
  * @return: True if admissible, false otherwise
  *
@@ -735,6 +739,7 @@ bool dcn32_subvp_vblank_admissable(struct dc *dc, struct dc_state *context, int
 	uint8_t non_subvp_pipes = 0;
 	bool drr_pipe_found = false;
 	struct vba_vars_st *vba = &context->bw_ctx.dml.vba;
+	bool vblank_psr_capable = false;
 
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
@@ -747,6 +752,7 @@ bool dcn32_subvp_vblank_admissable(struct dc *dc, struct dc_state *context, int
 				subvp_count++;
 			if (pipe->stream->mall_stream_config.type == SUBVP_NONE) {
 				non_subvp_pipes++;
+				vblank_psr_capable = (vblank_psr_capable || dcn32_is_psr_capable(pipe));
 				if (pipe->stream->ignore_msa_timing_param &&
 						(pipe->stream->allow_freesync || pipe->stream->vrr_active_variable)) {
 					drr_pipe_found = true;
@@ -755,7 +761,7 @@ bool dcn32_subvp_vblank_admissable(struct dc *dc, struct dc_state *context, int
 		}
 	}
 
-	if (subvp_count == 1 && non_subvp_pipes == 1 && !drr_pipe_found &&
+	if (subvp_count == 1 && non_subvp_pipes == 1 && !drr_pipe_found && !vblank_psr_capable &&
 			vba->DRAMClockChangeSupport[vlevel][vba->maxMpcComb] == dm_dram_clock_change_vblank_w_mall_sub_vp)
 		result = true;
 
-- 
2.40.1