drm/amd/display: Fix subvp+drr logic errors

[Why]
There is some logic error where the wrong variable was used to check for
OTG_MASTER and DPP_PIPE.

[How]
Add booleans to confirm that the expected pipes were found before
validating schedulability.
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Reviewed-by: Samson Tam <samson.tam@amd.com>
Reviewed-by: Chaitanya Dhere <chaitanya.dhere@amd.com>
Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

@@ -806,6 +806,8 @@ static bool subvp_drr_schedulable(struct dc *dc, struct dc_state *context)
 	int16_t drr_stretched_vblank_us = 0;
 	int16_t max_vblank_mallregion = 0;
 	struct dc_stream_state *phantom_stream;
+	bool subvp_found = false;
+	bool drr_found = false;
 
 	// Find SubVP pipe
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
@@ -818,8 +820,10 @@ static bool subvp_drr_schedulable(struct dc *dc, struct dc_state *context)
 			continue;
 
 		// Find the SubVP pipe
-		if (dc_state_get_pipe_subvp_type(context, pipe) == SUBVP_MAIN)
+		if (dc_state_get_pipe_subvp_type(context, pipe) == SUBVP_MAIN) {
+			subvp_found = true;
 			break;
+		}
 	}
 
 	// Find the DRR pipe
@@ -827,33 +831,37 @@ static bool subvp_drr_schedulable(struct dc *dc, struct dc_state *context)
 		drr_pipe = &context->res_ctx.pipe_ctx[i];
 
 		// We check for master pipe only
-		if (!resource_is_pipe_type(pipe, OTG_MASTER) ||
-				!resource_is_pipe_type(pipe, DPP_PIPE))
+		if (!resource_is_pipe_type(drr_pipe, OTG_MASTER) ||
+				!resource_is_pipe_type(drr_pipe, DPP_PIPE))
 			continue;
 
 		if (dc_state_get_pipe_subvp_type(context, drr_pipe) == SUBVP_NONE && drr_pipe->stream->ignore_msa_timing_param &&
-				(drr_pipe->stream->allow_freesync || drr_pipe->stream->vrr_active_variable || drr_pipe->stream->vrr_active_fixed))
+				(drr_pipe->stream->allow_freesync || drr_pipe->stream->vrr_active_variable || drr_pipe->stream->vrr_active_fixed)) {
+			drr_found = true;
 			break;
+		}
 	}
 
-	phantom_stream = dc_state_get_paired_subvp_stream(context, pipe->stream);
-	main_timing = &pipe->stream->timing;
-	phantom_timing = &phantom_stream->timing;
-	drr_timing = &drr_pipe->stream->timing;
-	prefetch_us = (phantom_timing->v_total - phantom_timing->v_front_porch) * phantom_timing->h_total /
-			(double)(phantom_timing->pix_clk_100hz * 100) * 1000000 +
-			dc->caps.subvp_prefetch_end_to_mall_start_us;
-	subvp_active_us = main_timing->v_addressable * main_timing->h_total /
-			(double)(main_timing->pix_clk_100hz * 100) * 1000000;
-	drr_frame_us = drr_timing->v_total * drr_timing->h_total /
-			(double)(drr_timing->pix_clk_100hz * 100) * 1000000;
-	// P-State allow width and FW delays already included phantom_timing->v_addressable
-	mall_region_us = phantom_timing->v_addressable * phantom_timing->h_total /
-			(double)(phantom_timing->pix_clk_100hz * 100) * 1000000;
-	stretched_drr_us = drr_frame_us + mall_region_us + SUBVP_DRR_MARGIN_US;
-	drr_stretched_vblank_us = (drr_timing->v_total - drr_timing->v_addressable) * drr_timing->h_total /
-			(double)(drr_timing->pix_clk_100hz * 100) * 1000000 + (stretched_drr_us - drr_frame_us);
-	max_vblank_mallregion = drr_stretched_vblank_us > mall_region_us ? drr_stretched_vblank_us : mall_region_us;
+	if (subvp_found && drr_found) {
+		phantom_stream = dc_state_get_paired_subvp_stream(context, pipe->stream);
+		main_timing = &pipe->stream->timing;
+		phantom_timing = &phantom_stream->timing;
+		drr_timing = &drr_pipe->stream->timing;
+		prefetch_us = (phantom_timing->v_total - phantom_timing->v_front_porch) * phantom_timing->h_total /
+				(double)(phantom_timing->pix_clk_100hz * 100) * 1000000 +
+				dc->caps.subvp_prefetch_end_to_mall_start_us;
+		subvp_active_us = main_timing->v_addressable * main_timing->h_total /
+				(double)(main_timing->pix_clk_100hz * 100) * 1000000;
+		drr_frame_us = drr_timing->v_total * drr_timing->h_total /
+				(double)(drr_timing->pix_clk_100hz * 100) * 1000000;
+		// P-State allow width and FW delays already included phantom_timing->v_addressable
+		mall_region_us = phantom_timing->v_addressable * phantom_timing->h_total /
+				(double)(phantom_timing->pix_clk_100hz * 100) * 1000000;
+		stretched_drr_us = drr_frame_us + mall_region_us + SUBVP_DRR_MARGIN_US;
+		drr_stretched_vblank_us = (drr_timing->v_total - drr_timing->v_addressable) * drr_timing->h_total /
+				(double)(drr_timing->pix_clk_100hz * 100) * 1000000 + (stretched_drr_us - drr_frame_us);
+		max_vblank_mallregion = drr_stretched_vblank_us > mall_region_us ? drr_stretched_vblank_us : mall_region_us;
+	}
 
 	/* We consider SubVP + DRR schedulable if the stretched frame duration of the DRR display (i.e. the
 	 * highest refresh rate + margin that can support UCLK P-State switch) passes the static analysis