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Commit 61c3d2b2 authored by Anusha Koduru's avatar Anusha Koduru
Browse files

msm: mdss: support no panel connected scenario for DSI 



Add proper bail out and also avoid any commands involving
ACK from the panel.

Change-Id: Id321e1564f32a8b1565d2e735e8af54fb502751e
Signed-off-by: default avatarAnusha Koduru <kanusha@codeaurora.org>
parent 70db5225

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

+4 −0
Original line number Diff line number Diff line
@@ -350,6 +350,9 @@ Optional properties: 
					"180" = panel is flipped in both horizontal and vertical directions

					"hflip" = panel is flipped in horizontal direction

					"vflip" = panel is flipped in vertical direction

- qcom,panel-ack-disabled: A boolean property to indicate, whether we need to wait for any ACK from the panel

			   for any commands that we send.



Note, if a given optional qcom,* binding is not present, then the driver will configure

the default values specified.
@@ -465,6 +468,7 @@ Example: 
		qcom,video-to-cmd-mode-switch-commands = [15 01 00 00 00 00 02 C2 0B

						15 01 00 00 00 00 02 C2 08];

		qcom,cmd-to-video-mode-switch-commands = [15 01 00 00 00 00 02 C2 03];

		qcom,panel-ack-disabled;

		qcom,mdss-dsi-horizontal-line-idle = <0 40 256>,

						<40 120 128>,

						<128 240 64>;

drivers/video/msm/mdss/mdss_dsi_host.c

+5 −0
Original line number Diff line number Diff line
@@ -911,6 +911,11 @@ int mdss_dsi_cmds_rx(struct mdss_dsi_ctrl_pdata *ctrl, 
	struct mdss_dsi_ctrl_pdata *mctrl = NULL;





	if (ctrl->panel_data.panel_info.panel_ack_disabled) {

		pr_err("%s: ACK from Client not supported\n", __func__);

		return rlen;

	}



	/*

	 * Turn on cmd mode in order to transmit the commands.

	 * For video mode, do not send cmds more than one pixel line,

drivers/video/msm/mdss/mdss_dsi_panel.c

+7 −0
Original line number Diff line number Diff line
@@ -1024,6 +1024,13 @@ static int mdss_dsi_parse_panel_features(struct device_node *np, 


	pr_info("%s: dynamic switch feature enabled: %d\n", __func__,

		pinfo->mipi.dynamic_switch_enabled);

	pinfo->panel_ack_disabled = of_property_read_bool(np,

				"qcom,panel-ack-disabled");



	if (pinfo->panel_ack_disabled && pinfo->esd_check_enabled) {

		pr_warn("ESD should not be enabled if panel ACK is disabled\n");

		pinfo->esd_check_enabled = false;

	}



	return 0;

}

drivers/video/msm/mdss/mdss_panel.h

+1 −0
Original line number Diff line number Diff line
@@ -348,6 +348,7 @@ struct mdss_panel_info { 
	int pwm_period;

	bool dynamic_fps;

	bool ulps_feature_enabled;

	bool panel_ack_disabled;

	bool esd_check_enabled;

	char dfps_update;

	int new_fps;