drm/i915/icl: Factor out combo PHY lane power setup helper

Factor out the combo PHY lane power configuration code to a separate
helper; it will be also needed by the next patch adding the same
configuration for DDI ports.

Add support for DDI ports and lane reversal as preparation for the next
patch.

The PWR_DOWN_LN_1 value is unspecified in the BSpec register description
so remove it.

v2:
- Fix up the wrong assumption that the encodings are the same for DDI
  and DSI ports. (Jani)
v3:
- Use intel_ instead of icl_ prefix. (Jani)
- Add required headers to intel_combo_phy.h after the upstream header
  refactoring.

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Madhav Chauhan <madhav.chauhan@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com> (v2)
Link: https://patchwork.freedesktop.org/patch/msgid/20190425185253.3197-1-imre.deak@intel.com

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_combo_phy.h b/drivers/gpu/drm/i915/intel_combo_phy.h
index f7f1e5ab34a9..749b644ddcb9 100644
--- a/drivers/gpu/drm/i915/intel_combo_phy.h
+++ b/drivers/gpu/drm/i915/intel_combo_phy.h
@@ -6,11 +6,17 @@
 #ifndef __INTEL_COMBO_PHY_H__
 #define __INTEL_COMBO_PHY_H__
 
+#include <linux/types.h>
+#include <drm/i915_drm.h>
+
 struct drm_i915_private;
 
 void icl_combo_phys_init(struct drm_i915_private *dev_priv);
 void icl_combo_phys_uninit(struct drm_i915_private *dev_priv);
 void cnl_combo_phys_init(struct drm_i915_private *dev_priv);
 void cnl_combo_phys_uninit(struct drm_i915_private *dev_priv);
+void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
+				    enum port port, bool is_dsi,
+				    int lane_count, bool lane_reversal);
 
 #endif /* __INTEL_COMBO_PHY_H__ */