disp: msm: Add support for seamless panel operating mode switch

DSI display may support video mode and command mode both and it may
support transition between these two modes.
This change adds seamless transition between these two modes for DSI
display by avoiding crtc enable/disable and panel power on/off
during modeset.

Change-Id: Id7ddaef7d1f0f7cc7d52283755bad53a246adec6
Signed-off-by: Lei Chen <chenlei@codeaurora.org>

msm/dsi/dsi_defs.h

@@ -74,6 +74,8 @@ enum dsi_op_mode {
  * @DSI_MODE_FLAG_DMS: Seamless transition is dynamic mode switch
  * @DSI_MODE_FLAG_VRR: Seamless transition is DynamicFPS.
  *                     New timing values are sent from DAL.
+ * @DSI_MODE_FLAG_POMS:
+ *         Seamless transition is dynamic panel operating mode switch
  */
 enum dsi_mode_flags {
 	DSI_MODE_FLAG_SEAMLESS			= BIT(0),
@@ -81,6 +83,7 @@ enum dsi_mode_flags {
 	DSI_MODE_FLAG_VBLANK_PRE_MODESET	= BIT(2),
 	DSI_MODE_FLAG_DMS			= BIT(3),
 	DSI_MODE_FLAG_VRR			= BIT(4),
+	DSI_MODE_FLAG_POMS			= BIT(5),
 };
 
 /**
@@ -555,12 +558,14 @@ struct dsi_display_mode_priv_info {
  * @timing:         Timing parameters for the panel.
  * @pixel_clk_khz:  Pixel clock in Khz.
  * @dsi_mode_flags: Flags to signal other drm components via private flags
+ * @panel_mode:      Panel mode
  * @priv_info:      Mode private info
  */
 struct dsi_display_mode {
 	struct dsi_mode_info timing;
 	u32 pixel_clk_khz;
 	u32 dsi_mode_flags;
+	enum dsi_op_mode panel_mode;
 	struct dsi_display_mode_priv_info *priv_info;
 };