drm/i915: Add intel_dotclock_calculate()
Extract the code to calculate the dotclock from the link clock and M/N
values into a new function from ironlake_crtc_clock_get().
The new function can be used to calculate the dotclock for both FDI and
DP cases.
Also simplify the code a bit along the way.
v2: Don't forget about non-pch encoders in ironlake_crtc_clock_get()
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index f6d5c92..9360694 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -803,5 +803,7 @@
extern void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv);
extern void intel_dp_get_m_n(struct intel_crtc *crtc,
struct intel_crtc_config *pipe_config);
+extern int intel_dotclock_calculate(int link_freq,
+ const struct intel_link_m_n *m_n);
#endif /* __INTEL_DRV_H__ */