drm/i915: Make ironlake_pch_transcoder_set_timings take crtc_state

Instead of passing crtc and dereferencing crtc->config,
pass the correct crtc_state and obtain the crtc pointer from there.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181004094604.2646-8-maarten.lankhorst@linux.intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -4608,12 +4608,12 @@ int lpt_get_iclkip(struct drm_i915_private *dev_priv)
 				 desired_divisor << auxdiv);
 }
 
-static void ironlake_pch_transcoder_set_timings(struct intel_crtc *crtc,
+static void ironlake_pch_transcoder_set_timings(const struct intel_crtc_state *crtc_state,
 						enum pipe pch_transcoder)
 {
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	enum transcoder cpu_transcoder = crtc->config->cpu_transcoder;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
 	I915_WRITE(PCH_TRANS_HTOTAL(pch_transcoder),
 		   I915_READ(HTOTAL(cpu_transcoder)));
@@ -4762,7 +4762,7 @@ static void ironlake_pch_enable(const struct intel_atomic_state *state,
 
 	/* set transcoder timing, panel must allow it */
 	assert_panel_unlocked(dev_priv, pipe);
-	ironlake_pch_transcoder_set_timings(crtc, pipe);
+	ironlake_pch_transcoder_set_timings(crtc_state, pipe);
 
 	intel_fdi_normal_train(crtc);
 
@@ -4809,7 +4809,7 @@ static void lpt_pch_enable(const struct intel_atomic_state *state,
 	lpt_program_iclkip(crtc);
 
 	/* Set transcoder timing. */
-	ironlake_pch_transcoder_set_timings(crtc, PIPE_A);
+	ironlake_pch_transcoder_set_timings(crtc_state, PIPE_A);
 
 	lpt_enable_pch_transcoder(dev_priv, cpu_transcoder);
 }