drm/gma500/cdv: Cedarview display cleanups

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>

drivers/gpu/drm/gma500/cdv_intel_display.c

@@ -412,8 +412,11 @@ static bool cdv_intel_find_dp_pll(const struct gma_limit_t *limit,
 				  int refclk,
 				  struct gma_clock_t *best_clock)
 {
+	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 	struct gma_clock_t clock;
-	if (refclk == 27000) {
+
+	switch (refclk) {
+	case 27000:
 		if (target < 200000) {
 			clock.p1 = 2;
 			clock.p2 = 10;
@@ -427,7 +430,9 @@ static bool cdv_intel_find_dp_pll(const struct gma_limit_t *limit,
 			clock.m1 = 0;
 			clock.m2 = 98;
 		}
-	} else if (refclk == 100000) {
+		break;
+
+	case 100000:
 		if (target < 200000) {
 			clock.p1 = 2;
 			clock.p2 = 10;
@@ -441,12 +446,13 @@ static bool cdv_intel_find_dp_pll(const struct gma_limit_t *limit,
 			clock.m1 = 0;
 			clock.m2 = 133;
 		}
-	} else
+		break;
+
+	default:
 		return false;
-	clock.m = clock.m2 + 2;
-	clock.p = clock.p1 * clock.p2;
-	clock.vco = (refclk * clock.m) / clock.n;
-	clock.dot = clock.vco / clock.p;
+	}
+
+	gma_crtc->clock_funcs->clock(refclk, &clock);
 	memcpy(best_clock, &clock, sizeof(struct gma_clock_t));
 	return true;
 }
@@ -468,49 +474,6 @@ static bool cdv_intel_pipe_enabled(struct drm_device *dev, int pipe)
 	return true;
 }
 
-static bool cdv_intel_single_pipe_active (struct drm_device *dev)
-{
-	uint32_t pipe_enabled = 0;
-
-	if (cdv_intel_pipe_enabled(dev, 0))
-		pipe_enabled |= FIFO_PIPEA;
-
-	if (cdv_intel_pipe_enabled(dev, 1))
-		pipe_enabled |= FIFO_PIPEB;
-
-
-	DRM_DEBUG_KMS("pipe enabled %x\n", pipe_enabled);
-
-	if (pipe_enabled == FIFO_PIPEA || pipe_enabled == FIFO_PIPEB)
-		return true;
-	else
-		return false;
-}
-
-static bool is_pipeb_lvds(struct drm_device *dev, struct drm_crtc *crtc)
-{
-	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
-	struct drm_mode_config *mode_config = &dev->mode_config;
-	struct drm_connector *connector;
-
-	if (gma_crtc->pipe != 1)
-		return false;
-
-	list_for_each_entry(connector, &mode_config->connector_list, head) {
-		struct gma_encoder *gma_encoder =
-					gma_attached_encoder(connector);
-
-		if (!connector->encoder
-		    || connector->encoder->crtc != crtc)
-			continue;
-
-		if (gma_encoder->type == INTEL_OUTPUT_LVDS)
-			return true;
-	}
-
-	return false;
-}
-
 void cdv_disable_sr(struct drm_device *dev)
 {
 	if (REG_READ(FW_BLC_SELF) & FW_BLC_SELF_EN) {
@@ -535,8 +498,10 @@ void cdv_disable_sr(struct drm_device *dev)
 void cdv_update_wm(struct drm_device *dev, struct drm_crtc *crtc)
 {
 	struct drm_psb_private *dev_priv = dev->dev_private;
+	struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
 
-	if (cdv_intel_single_pipe_active(dev)) {
+	/* Is only one pipe enabled? */
+	if (cdv_intel_pipe_enabled(dev, 0) ^ cdv_intel_pipe_enabled(dev, 1)) {
 		u32 fw;
 
 		fw = REG_READ(DSPFW1);
@@ -557,7 +522,9 @@ void cdv_update_wm(struct drm_device *dev, struct drm_crtc *crtc)
 
 		/* ignore FW4 */
 
-		if (is_pipeb_lvds(dev, crtc)) {
+		/* Is pipe b lvds ? */
+		if (gma_crtc->pipe == 1 &&
+		    gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 			REG_WRITE(DSPFW5, 0x00040330);
 		} else {
 			fw = (3 << DSP_PLANE_B_FIFO_WM1_SHIFT) |