[PATCH 2/9] drm/amd/display: Ignore scalar validation failure if pipe is phantom

[Hamza Mahfooz]

From: Chris Park <chris.park at amd.com>

[Why]
There are some pipe scaler validation failure when the pipe is phantom
and causes crash in DML validation. Since, scalar parameters are not
as important in phantom pipe and we require this plane to do successful
MCLK switches, the failure condition can be ignored.

[How]
Ignore scalar validation failure if the pipe validation is marked as
phantom pipe.

Cc: stable at vger.kernel.org # 6.11+
Reviewed-by: Dillon Varone <dillon.varone at amd.com>
Signed-off-by: Chris Park <chris.park at amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 33125b95c3a1..619fad17de55 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1501,6 +1501,10 @@ bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
 		res = spl_calculate_scaler_params(spl_in, spl_out);
 		// Convert respective out params from SPL to scaler data
 		translate_SPL_out_params_to_pipe_ctx(pipe_ctx, spl_out);
+
+		/* Ignore scaler failure if pipe context plane is phantom plane */
+		if (!res && plane_state->is_phantom)
+			res = true;
 	} else {
 #endif
 	/* depends on h_active */
@@ -1571,6 +1575,10 @@ bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
 					&plane_state->scaling_quality);
 	}
 
+	/* Ignore scaler failure if pipe context plane is phantom plane */
+	if (!res && plane_state->is_phantom)
+		res = true;
+
 	if (res && (pipe_ctx->plane_res.scl_data.taps.v_taps != temp.v_taps ||
 		pipe_ctx->plane_res.scl_data.taps.h_taps != temp.h_taps ||
 		pipe_ctx->plane_res.scl_data.taps.v_taps_c != temp.v_taps_c ||
-- 
2.46.1