msm: mdss: Add support to configure the video mode interleave bit

Some video mode panels need to have the command mode
operation interleaved on the last line of the video stream.
Add support to enable this register via a panel dtsi property.

Change-Id: I3dfe36816d7602da4f66d09ea23ac9c6185f9858
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>

Documentation/devicetree/bindings/fb/mdss-dsi-panel.txt

@@ -175,6 +175,8 @@ Optional properties:
 					horizontal back porch (HBP) blanking period.
 - qcom,mdss-dsi-hsa-power-mode:		Boolean to determine DSI lane state during
 					horizontal sync active (HSA) mode.
+- qcom,mdss-dsi-last-line-interleave	Boolean to determine if last line
+					interleave flag needs to be enabled.
 - qcom,mdss-dsi-bllp-eof-power-mode:	Boolean to determine DSI lane state during
 					blanking low power period (BLLP) EOF mode.
 - qcom,mdss-dsi-bllp-power-mode:	Boolean to determine DSI lane state during
@@ -318,6 +320,7 @@ Example:
 		qcom,mdss-dsi-hsa-power-mode;
 		qcom,mdss-dsi-bllp-eof-power-mode;
 		qcom,mdss-dsi-bllp-power-mode;
+		qcom,mdss-dsi-last-line-interleave;
 		qcom,mdss-dsi-traffic-mode = <0>;
 		qcom,mdss-dsi-virtual-channel-id = <0>;
 		qcom,mdss-dsi-color-order = <0>;

drivers/video/msm/mdss/mdss_dsi_host.c

@@ -275,6 +275,8 @@ void mdss_dsi_host_init(struct mipi_panel_info *pinfo,
 
 	if (pinfo->mode == DSI_VIDEO_MODE) {
 		data = 0;
+		if (pinfo->last_line_interleave_en)
+			data |= BIT(31);
 		if (pinfo->pulse_mode_hsa_he)
 			data |= BIT(28);
 		if (pinfo->hfp_power_stop)

drivers/video/msm/mdss/mdss_dsi_panel.c

@@ -888,6 +888,8 @@ static int mdss_panel_parse_dt(struct device_node *np,
 		"qcom,mdss-dsi-hsa-power-mode");
 	pinfo->mipi.hbp_power_stop = of_property_read_bool(np,
 		"qcom,mdss-dsi-hbp-power-mode");
+	pinfo->mipi.last_line_interleave_en = of_property_read_bool(np,
+		"qcom,mdss-dsi-last-line-interleave");
 	pinfo->mipi.bllp_power_stop = of_property_read_bool(np,
 		"qcom,mdss-dsi-bllp-power-mode");
 	pinfo->mipi.eof_bllp_power_stop = of_property_read_bool(

drivers/video/msm/mdss/mdss_panel.h

@@ -232,6 +232,7 @@ struct mipi_panel_info {
 	char hbp_power_stop;
 	char hsa_power_stop;
 	char eof_bllp_power_stop;
+	char last_line_interleave_en;
 	char bllp_power_stop;
 	char traffic_mode;
 	char frame_rate;