patches.baytrail/0121-drm-i915-read-current-freq-from-Punit-on-VLV.patch

From 97e7d634e0ec64c8977e8584f3067d09b7ca4efc Mon Sep 17 00:00:00 2001
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu, 2 May 2013 10:48:07 -0700
Subject: drm/i915: read current freq from Punit on VLV

Instead of returning the cached value, which is just what the kernel
requested.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 177006a10b33c9bd729cd60be0a37b41a23e4df3)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_sysfs.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index ca00df2de07b..c0d7875b475c 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -212,10 +212,13 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
 	int ret;
 
 	mutex_lock(&dev_priv->rps.hw_lock);
-	if (IS_VALLEYVIEW(dev_priv->dev))
-		ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.cur_delay);
-	else
+	if (IS_VALLEYVIEW(dev_priv->dev)) {
+		u32 freq;
+		valleyview_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS, &freq);
+		ret = vlv_gpu_freq(dev_priv->mem_freq, (freq >> 8) & 0xff);
+	} else {
 		ret = dev_priv->rps.cur_delay * GT_FREQUENCY_MULTIPLIER;
+	}
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
 	return snprintf(buf, PAGE_SIZE, "%d\n", ret);
-- 
1.8.5.rc3