drm/amd/display: Ignore scalar validation failure if pipe is phantom

[ Upstream commit c33a93201ca07119de90e8c952fbdf65920ab55d ]

[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@vger.kernel.org # 6.11+
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Chris Park <chris.park@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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 df513dbd32bdf9400ea67d7d702444374a7ceb04..d915020a429582a64a49925a4dfad86f7d4a3a36 100644 (file)
--- 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 ||