drm/i915: Use the direct mapping of pipe->crtc

Why iterate all the crtcs to find the pipe, when we already know which
crtc is attached to which pipe?

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/gpu/drm/i915/intel_display.c

@@ -5226,18 +5226,6 @@ int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
 	return 0;
 }
 
-struct drm_crtc *intel_get_crtc_from_pipe(struct drm_device *dev, int pipe)
-{
-	struct drm_crtc *crtc = NULL;
-
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-		if (intel_crtc->pipe == pipe)
-			break;
-	}
-	return crtc;
-}
-
 static int intel_encoder_clones(struct drm_device *dev, int type_mask)
 {
 	struct intel_encoder *encoder;

drivers/gpu/drm/i915/intel_drv.h

@@ -177,6 +177,13 @@ struct intel_crtc {
 #define to_intel_encoder(x) container_of(x, struct intel_encoder, base)
 #define to_intel_framebuffer(x) container_of(x, struct intel_framebuffer, base)
 
+static inline struct drm_crtc *
+intel_get_crtc_for_pipe(struct drm_device *dev, int pipe)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	return dev_priv->pipe_to_crtc_mapping[pipe];
+}
+
 struct intel_unpin_work {
 	struct work_struct work;
 	struct drm_device *dev;
@@ -235,7 +242,6 @@ int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
 				struct drm_file *file_priv);
 extern void intel_wait_for_vblank_off(struct drm_device *dev, int pipe);
 extern void intel_wait_for_vblank(struct drm_device *dev, int pipe);
-extern struct drm_crtc *intel_get_crtc_from_pipe(struct drm_device *dev, int pipe);
 extern struct drm_crtc *intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
 						   struct drm_connector *connector,
 						   struct drm_display_mode *mode,

drivers/gpu/drm/i915/intel_dvo.c

@@ -322,7 +322,7 @@ intel_dvo_get_current_mode(struct drm_connector *connector)
 		struct drm_crtc *crtc;
 		int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
 
-		crtc = intel_get_crtc_from_pipe(dev, pipe);
+		crtc = intel_get_crtc_for_pipe(dev, pipe);
 		if (crtc) {
 			mode = intel_crtc_mode_get(dev, crtc);
 			if (mode) {

drivers/gpu/drm/i915/intel_lvds.c

@@ -932,7 +932,7 @@ void intel_lvds_init(struct drm_device *dev)
 
 	lvds = I915_READ(LVDS);
 	pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
-	crtc = intel_get_crtc_from_pipe(dev, pipe);
+	crtc = intel_get_crtc_for_pipe(dev, pipe);
 
 	if (crtc && (lvds & LVDS_PORT_EN)) {
 		dev_priv->panel_fixed_mode = intel_crtc_mode_get(dev, crtc);