From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Mon, 15 Oct 2012 18:51:31 +0000 (-0300)
Subject: drm/i915: add DP support to intel_ddi_pll_mode_set
X-Git-Tag: v3.8-rc1~42^2~193^2~182
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=068759bd6ee26b5c69977d99611cc72b43280ab5;p=platform%2Fkernel%2Flinux-exynos.git

drm/i915: add DP support to intel_ddi_pll_mode_set

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

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index e58df71..5071370 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -763,6 +763,7 @@ bool intel_ddi_pll_mode_set(struct drm_crtc *crtc, int clock)
 {
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
+	struct drm_encoder *encoder = &intel_encoder->base;
 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
 	struct intel_ddi_plls *plls = &dev_priv->ddi_plls;
 	int type = intel_encoder->type;
@@ -773,7 +774,29 @@ bool intel_ddi_pll_mode_set(struct drm_crtc *crtc, int clock)
 
 	intel_ddi_put_crtc_pll(crtc);
 
-	if (type == INTEL_OUTPUT_HDMI) {
+	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
+		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+		switch (intel_dp->link_bw) {
+		case DP_LINK_BW_1_62:
+			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_810;
+			break;
+		case DP_LINK_BW_2_7:
+			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_1350;
+			break;
+		case DP_LINK_BW_5_4:
+			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_2700;
+			break;
+		default:
+			DRM_ERROR("Link bandwidth %d unsupported\n",
+				  intel_dp->link_bw);
+			return false;
+		}
+
+		/* We don't need to turn any PLL on because we'll use LCPLL. */
+		return true;
+
+	} else if (type == INTEL_OUTPUT_HDMI) {
 		int p, n2, r2;
 
 		if (plls->wrpll1_refcount == 0) {