1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 505fc5cf26f8..0364292367b1 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -257,8 +257,14 @@ static bool intel_crt_compute_config(struct intel_encoder *encoder,
                 pipe_config->has_pch_encoder = true;
 
         /* LPT FDI RX only supports 8bpc. */
-        if (HAS_PCH_LPT(dev))
+        if (HAS_PCH_LPT(dev)) {
+                if (pipe_config->bw_constrained && pipe_config->pipe_bpp < 24) {
+                        DRM_DEBUG_KMS("LPT only supports 24bpp\n");
+                        return false;
+                }
+
                 pipe_config->pipe_bpp = 24;
+        }
 
         /* FDI must always be 2.7 GHz */
         if (HAS_DDI(dev)) {