drm/i915/bxt: Initialize MIPI DSI for BXT

This patch contains following changes:
1. Add BXT MIPI display address base.
2. Call dsi_init from display_setup function.

v2: Rebased on latest nightly branch

v3 by Jani: init dsi after ddi
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458640910-5338-1-git-send-email-jani.nikula@intel.com

drivers/gpu/drm/i915/i915_reg.h

@@ -1802,6 +1802,7 @@ enum skl_disp_power_wells {
 
 #define VLV_DISPLAY_BASE 0x180000
 #define VLV_MIPI_BASE VLV_DISPLAY_BASE
+#define BXT_MIPI_BASE 0x60000
 
 #define VLV_GU_CTL0	_MMIO(VLV_DISPLAY_BASE + 0x2030)
 #define VLV_GU_CTL1	_MMIO(VLV_DISPLAY_BASE + 0x2034)

drivers/gpu/drm/i915/intel_display.c

@@ -14394,6 +14394,8 @@ static void intel_setup_outputs(struct drm_device *dev)
 		intel_ddi_init(dev, PORT_A);
 		intel_ddi_init(dev, PORT_B);
 		intel_ddi_init(dev, PORT_C);
+
+		intel_dsi_init(dev);
 	} else if (HAS_DDI(dev)) {
 		int found;
 

drivers/gpu/drm/i915/intel_dsi.c

@@ -1163,6 +1163,8 @@ void intel_dsi_init(struct drm_device *dev)
 
 	if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
 		dev_priv->mipi_mmio_base = VLV_MIPI_BASE;
+	} else if (IS_BROXTON(dev)) {
+		dev_priv->mipi_mmio_base = BXT_MIPI_BASE;
 	} else {
 		DRM_ERROR("Unsupported Mipi device to reg base");
 		return;