1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ed6addf74275..711ec3314893 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3989,7 +3989,7 @@ static int ironlake_fdi_compute_config(struct intel_crtc *intel_crtc,
 {
         struct drm_device *dev = intel_crtc->base.dev;
         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
-        int target_clock, lane, link_bw;
+        int target_clock, lane, link_bw, fdi_dotclock;
         bool setup_ok, needs_recompute = false;
 
 retry:
@@ -4007,14 +4007,16 @@ retry:
         else
                 target_clock = adjusted_mode->clock;
 
-        lane = ironlake_get_lanes_required(target_clock, link_bw,
+        fdi_dotclock = target_clock;
+        if (pipe_config->pixel_multiplier > 1)
+                fdi_dotclock /= pipe_config->pixel_multiplier;
+
+        lane = ironlake_get_lanes_required(fdi_dotclock, link_bw,
                                            pipe_config->pipe_bpp);
 
         pipe_config->fdi_lanes = lane;
 
-        if (pipe_config->pixel_multiplier > 1)
-                link_bw *= pipe_config->pixel_multiplier;
-        intel_link_compute_m_n(pipe_config->pipe_bpp, lane, target_clock,
+        intel_link_compute_m_n(pipe_config->pipe_bpp, lane, fdi_dotclock,
                                link_bw, &pipe_config->fdi_m_n);
 
         setup_ok = ironlake_check_fdi_lanes(intel_crtc->base.dev,