drm/i915: Pass crtc_state to update_scanline_offset

No need to look at crtc->config when we have crtc_state in the caller.
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/20181011100457.8776-6-maarten.lankhorst@linux.intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -12102,8 +12102,9 @@ intel_modeset_verify_disabled(struct drm_device *dev,
 	verify_disabled_dpll_state(dev);
 }
 
-static void update_scanline_offset(struct intel_crtc *crtc)
+static void update_scanline_offset(const struct intel_crtc_state *crtc_state)
 {
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 
 	/*
@@ -12134,7 +12135,7 @@ static void update_scanline_offset(struct intel_crtc *crtc)
 	 * answer that's slightly in the future.
 	 */
 	if (IS_GEN2(dev_priv)) {
-		const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
+		const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode;
 		int vtotal;
 
 		vtotal = adjusted_mode->crtc_vtotal;
@@ -12143,7 +12144,7 @@ static void update_scanline_offset(struct intel_crtc *crtc)
 
 		crtc->scanline_offset = vtotal - 1;
 	} else if (HAS_DDI(dev_priv) &&
-		   intel_crtc_has_type(crtc->config, INTEL_OUTPUT_HDMI)) {
+		   intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
 		crtc->scanline_offset = 2;
 	} else
 		crtc->scanline_offset = 1;
@@ -12497,7 +12498,7 @@ static void intel_update_crtc(struct drm_crtc *crtc,
 						 to_intel_plane(crtc->primary));
 
 	if (modeset) {
-		update_scanline_offset(intel_crtc);
+		update_scanline_offset(pipe_config);
 		dev_priv->display.crtc_enable(pipe_config, state);
 
 		/* vblanks work again, re-enable pipe CRC. */
@@ -15673,7 +15674,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 
 			drm_calc_timestamping_constants(&crtc->base,
 							&crtc_state->base.adjusted_mode);
-			update_scanline_offset(crtc);
+			update_scanline_offset(crtc_state);
 		}
 
 		dev_priv->min_cdclk[crtc->pipe] = min_cdclk;