Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit afd6df1f authored by Ajay Singh Parmar's avatar Ajay Singh Parmar
Browse files

msm: mdss: hdmi: Handle fast HPD interrupts 



When downstream device cable is connected and disconnected
very quickly, or connect/disconnect processing takes more time
than expected, HPD state machine needs to be put into right state
to make sure HDMI is subsequently turned ON and OFF properly.

Change-Id: I96fbc454951b6bbf5af05b2b74a04f7ba4ddce11
Signed-off-by: default avatarAjay Singh Parmar <aparmar@codeaurora.org>
parent cbe50b5f

drivers/video/msm/mdss/mdss_hdmi_tx.c

+14 −4
Original line number Diff line number Diff line
@@ -3430,9 +3430,14 @@ static int hdmi_tx_power_off(struct mdss_panel_data *panel_data) 
	hdmi_ctrl->panel_power_on = false;

	mutex_unlock(&hdmi_ctrl->power_mutex);



	mutex_lock(&hdmi_ctrl->mutex);

	if (hdmi_ctrl->hpd_off_pending) {

		hdmi_tx_hpd_off(hdmi_ctrl);

		hdmi_ctrl->hpd_off_pending = false;

		mutex_unlock(&hdmi_ctrl->mutex);

		if (!hdmi_ctrl->hpd_state)

			hdmi_tx_hpd_off(hdmi_ctrl);

	} else {

		mutex_unlock(&hdmi_ctrl->mutex);

	}



	if (hdmi_ctrl->hdmi_tx_hpd_done)
@@ -3661,11 +3666,14 @@ static int hdmi_tx_sysfs_enable_hpd(struct hdmi_tx_ctrl *hdmi_ctrl, int on) 
			reinit_completion(&hdmi_ctrl->hpd_off_done);

			timeout = wait_for_completion_timeout(

				&hdmi_ctrl->hpd_off_done, HZ);



			if (!timeout)

			if (!timeout) {

				hdmi_ctrl->hpd_off_pending = false;

				DEV_ERR("%s: hpd off still pending\n",

					__func__);

				return 0;

			}

		}



		rc = hdmi_tx_hpd_on(hdmi_ctrl);

	} else {

		mutex_lock(&hdmi_ctrl->power_mutex);
@@ -4118,7 +4126,9 @@ static int hdmi_tx_panel_event_handler(struct mdss_panel_data *panel_data, 
			hdmi_tx_power_off(panel_data);

			panel_data->panel_info.cont_splash_enabled = false;

		} else {

			if (hdmi_ctrl->hpd_feature_on)

			if (hdmi_ctrl->hpd_feature_on &&

				hdmi_ctrl->hpd_initialized &&

				!hdmi_ctrl->hpd_state)

				hdmi_tx_hpd_polarity_setup(hdmi_ctrl,

					HPD_CONNECT_POLARITY);

		}