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drm/i915: Extract broadwell_calc_cdclk()

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Try to reduce the amount of duplicated cdclk magic numbers by
moving the max_pixclk->cdclk conversion into a helper.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1462995892-32416-3-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2016-05-11 22:44:41 +03:00
parent e1ff5f0126
commit 587c791415
1 changed files with 14 additions and 9 deletions
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23
drivers/gpu/drm/i915/intel_display.c
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@ -9675,6 +9675,18 @@ static void broadwell_set_cdclk(struct drm_device *dev, int cdclk)
cdclk, dev_priv->cdclk_freq);
}
static int broadwell_calc_cdclk(int max_pixclk)
{
if (max_pixclk > 540000)
return 675000;
else if (max_pixclk > 450000)
return 540000;
else if (max_pixclk > 337500)
return 450000;
else
return 337500;
}
static int broadwell_modeset_calc_cdclk(struct drm_atomic_state *state)
{
struct drm_i915_private *dev_priv = to_i915(state->dev);
@ -9686,14 +9698,7 @@ static int broadwell_modeset_calc_cdclk(struct drm_atomic_state *state)
* FIXME should also account for plane ratio
* once 64bpp pixel formats are supported.
*/
if (max_pixclk > 540000)
cdclk = 675000;
else if (max_pixclk > 450000)
cdclk = 540000;
else if (max_pixclk > 337500)
cdclk = 450000;
else
cdclk = 337500;
cdclk = broadwell_calc_cdclk(max_pixclk);
if (cdclk > dev_priv->max_cdclk_freq) {
DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
@ -9703,7 +9708,7 @@ static int broadwell_modeset_calc_cdclk(struct drm_atomic_state *state)
intel_state->cdclk = intel_state->dev_cdclk = cdclk;
if (!intel_state->active_crtcs)
intel_state->dev_cdclk = 337500;
intel_state->dev_cdclk = broadwell_calc_cdclk(0);
return 0;
}