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drm/i915: Simplify ilk_get_aux_clock_divider

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Now that we are "extracting" the cdclk frequency on ILK-IVB we
can also simplify ilk_get_aux_clock_divider() to calculate the
divider based on cdclk instead of hardcoding the values.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2015-03-31 14:11:59 +03:00 committed by Daniel Vetter
parent a7c66cd86a
commit 469d4b2a4e
1 changed files with 2 additions and 4 deletions
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6
drivers/gpu/drm/i915/intel_dp.c
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@ -696,15 +696,13 @@ static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
{
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = intel_dig_port->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (index)
return 0;
if (intel_dig_port->port == PORT_A) {
if (IS_GEN6(dev) || IS_GEN7(dev))
return 200; /* SNB & IVB eDP input clock at 400Mhz */
else
return 225; /* eDP input clock at 450Mhz */
return DIV_ROUND_UP(dev_priv->display.get_display_clock_speed(dev), 2000);
} else {
return DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
}