drm/i915: use cpu/pch transcoder on intel_enable_pipe

This function runs on Haswell, so set the correct pch_transcoder and
cpu_transcoder variables. This fixes an assertion failure on Haswell
VGA.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 82ab55af52fe..4e303cf7ead6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1812,9 +1812,15 @@ static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
 {
         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
                                                                       pipe);
+        enum transcoder pch_transcoder;
         int reg;
         u32 val;
 
+        if (IS_HASWELL(dev_priv->dev))
+                pch_transcoder = TRANSCODER_A;
+        else
+                pch_transcoder = pipe;
+
         /*
          * A pipe without a PLL won't actually be able to drive bits from
          * a plane.  On ILK+ the pipe PLLs are integrated, so we don't
@@ -1825,8 +1831,8 @@ static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
         else {
                 if (pch_port) {
                         /* if driving the PCH, we need FDI enabled */
-                        assert_fdi_rx_pll_enabled(dev_priv, pipe);
-                        assert_fdi_tx_pll_enabled(dev_priv, pipe);
+                        assert_fdi_rx_pll_enabled(dev_priv, pch_transcoder);
+                        assert_fdi_tx_pll_enabled(dev_priv, cpu_transcoder);
                 }
                 /* FIXME: assert CPU port conditions for SNB+ */
         }