linux-kernel - [PATCH 8/9] drm/i915: All PCH refclks are 120MHz

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Date:	Mon, 26 Sep 2011 23:11:45 -0700
From:	Keith Packard <keithp@...thp.com>
To:	Dave Airlie <airlied@...hat.com>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	intel-gfx@...ts.freedesktop.org, Keith Packard <keithp@...thp.com>
Subject: [PATCH 8/9] drm/i915: All PCH refclks are 120MHz

I can't find any reference clocks which run at 96MHz as seems to be
indicated from the comments in this code.

Signed-off-by: Keith Packard <keithp@...thp.com>
---
 drivers/gpu/drm/i915/intel_display.c |   14 ++++----------
 1 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 66cd351..919db79 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5271,16 +5271,10 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
 		num_connectors++;
 	}
 
-	if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
-		refclk = dev_priv->lvds_ssc_freq * 1000;
-		DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
-			      refclk / 1000);
-	} else {
-		refclk = 96000;
-		if (!has_edp_encoder ||
-		    intel_encoder_is_pch_edp(&has_edp_encoder->base))
-			refclk = 120000; /* 120Mhz refclk */
-	}
+	/*
+	 * Every reference clock in a PCH system is 120MHz
+	 */
+	refclk = 120000;
 
 	/*
 	 * Returns a set of divisors for the desired target clock with the given
-- 
1.7.6.3

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