drm/i915/icl: Make common DSI functions available

This patch moves couple of legacy DSI functions to header and common DSI
files so that they can be re-used by Gen11 DSI. No functional change.

v2 by Jani:
 - Move intel_dsi_msleep() to intel_dsi_vbt.c
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/bd1f5f3e96d3e1de4d359f4fd1b750ac7e3c87d4.1539613303.git.jani.nikula@intel.com

drivers/gpu/drm/i915/intel_dsi.h

@@ -129,6 +129,16 @@ static inline struct intel_dsi *enc_to_intel_dsi(struct drm_encoder *encoder)
 	return container_of(encoder, struct intel_dsi, base.base);
 }
 
+static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
+{
+	return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE;
+}
+
+static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
+{
+	return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE;
+}
+
 /* intel_dsi.c */
 int intel_dsi_bitrate(const struct intel_dsi *intel_dsi);
 int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi);
@@ -162,5 +172,6 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id);
 int intel_dsi_vbt_get_modes(struct intel_dsi *intel_dsi);
 void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
 				 enum mipi_seq seq_id);
+void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec);
 
 #endif /* _INTEL_DSI_H */

drivers/gpu/drm/i915/intel_dsi_vbt.c

@@ -481,6 +481,17 @@ void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
 	}
 }
 
+void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec)
+{
+	struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
+
+	/* For v3 VBTs in vid-mode the delays are part of the VBT sequences */
+	if (is_vid_mode(intel_dsi) && dev_priv->vbt.dsi.seq_version >= 3)
+		return;
+
+	msleep(msec);
+}
+
 int intel_dsi_vbt_get_modes(struct intel_dsi *intel_dsi)
 {
 	struct intel_connector *connector = intel_dsi->attached_connector;

drivers/gpu/drm/i915/vlv_dsi.c

@@ -290,16 +290,6 @@ static void band_gap_reset(struct drm_i915_private *dev_priv)
 	mutex_unlock(&dev_priv->sb_lock);
 }
 
-static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
-{
-	return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE;
-}
-
-static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
-{
-	return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE;
-}
-
 static bool intel_dsi_compute_config(struct intel_encoder *encoder,
 				     struct intel_crtc_state *pipe_config,
 				     struct drm_connector_state *conn_state)
@@ -746,17 +736,6 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder,
 			      const struct intel_crtc_state *pipe_config);
 static void intel_dsi_unprepare(struct intel_encoder *encoder);
 
-static void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec)
-{
-	struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
-
-	/* For v3 VBTs in vid-mode the delays are part of the VBT sequences */
-	if (is_vid_mode(intel_dsi) && dev_priv->vbt.dsi.seq_version >= 3)
-		return;
-
-	msleep(msec);
-}
-
 /*
  * Panel enable/disable sequences from the VBT spec.
  *