[6.1] drm/amd/display: Fix subvp+drr logic errors

Commit Message

Murad Masimov Sept. 16, 2024, 10:43 a.m. UTC

From: Alvin Lee <[e-mail]>

commit 8a0f02b7beed7b2b768dbdf3b79960de68f460c5 upstream.

[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 <[e-mail]>
Acked-by: Rodrigo Siqueira <[e-mail]>
Reviewed-by: Samson Tam <[e-mail]>
Reviewed-by: Chaitanya Dhere <[e-mail]>
Signed-off-by: Alvin Lee <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>
[[e-mail]: In order to adapt this patch to branch 6.1
only changes related to finding the SubVP pipe were applied
as in 6.1 drr_pipe is passed as a function argument.]
Signed-off-by: Murad Masimov <[e-mail]>
---
 drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
index 85e0d1c2a908..4b0719392d28 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
@@ -862,6 +862,7 @@  static bool subvp_drr_schedulable(struct dc *dc, struct dc_state *context, struc
 	int16_t stretched_drr_us = 0;
 	int16_t drr_stretched_vblank_us = 0;
 	int16_t max_vblank_mallregion = 0;
+	bool subvp_found = false;
 
 	// Find SubVP pipe
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
@@ -873,10 +874,15 @@  static bool subvp_drr_schedulable(struct dc *dc, struct dc_state *context, struc
 			continue;
 
 		// Find the SubVP pipe
-		if (pipe->stream->mall_stream_config.type == SUBVP_MAIN)
+		if (pipe->stream->mall_stream_config.type == SUBVP_MAIN) {
+			subvp_found = true;
 			break;
+		}
 	}
 
+	if (!subvp_found)
+		return false;
+
 	main_timing = &pipe->stream->timing;
 	phantom_timing = &pipe->stream->mall_stream_config.paired_stream->timing;
 	drr_timing = &drr_pipe->stream->timing;