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drm/i915: Fix GMBUSFREQ on vlv/chv

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vlv_cdclk_freq is in kHz but we need MHz for the GMBUSFREQ divider.

This is a regression from:
commit f8bf63fdcb
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Fri Jun 13 13:37:54 2014 +0300

    drm/i915: Kill duplicated cdclk readout code from i2c

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2014-10-16 20:52:31 +03:00 committed by Jani Nikula
parent 7a7f84ccb8
commit 6be1e3d3ea
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -4585,7 +4585,7 @@ static void vlv_update_cdclk(struct drm_device *dev)
* BSpec erroneously claims we should aim for 4MHz, but
* in fact 1MHz is the correct frequency.
*/
I915_WRITE(GMBUSFREQ_VLV, dev_priv->vlv_cdclk_freq);
I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->vlv_cdclk_freq, 1000));
}
/* Adjust CDclk dividers to allow high res or save power if possible */