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Commit c7f38e4c authored by Ajay Singh Parmar's avatar Ajay Singh Parmar
Browse files

msm: mdss: hdmi: enable ddc gpios before any ddc transaction 



Enable DDC power module and corresponding GPIOs before EDID read,
write, HDCP authentication and SCDC communication with sink to
avoid any DDC read or write failures.

Change-Id: Ia88c616d7a6149c3be190b5fbab22444448aea5d
Signed-off-by: default avatarAjay Singh Parmar <aparmar@codeaurora.org>
parent a3883c35

drivers/video/msm/mdss/mdss_hdmi_tx.c

+15 −8
Original line number Diff line number Diff line
@@ -4309,11 +4309,6 @@ static int hdmi_tx_start_hdcp(struct hdmi_tx_ctrl *hdmi_ctrl) 
	if (hdmi_tx_is_encryption_set(hdmi_ctrl))

		hdmi_tx_config_avmute(hdmi_ctrl, true);



	if (hdmi_tx_enable_power(hdmi_ctrl, HDMI_TX_DDC_PM, true)) {

		DEV_ERR("%s: Failed to enable ddc power\n", __func__);

		return -ENODEV;

	}



	rc = hdmi_ctrl->hdcp_ops->hdmi_hdcp_authenticate(hdmi_ctrl->hdcp_data);

	if (rc)

		DEV_ERR("%s: hdcp auth failed. rc=%d\n", __func__, rc);
@@ -4487,10 +4482,16 @@ static int hdmi_tx_panel_event_handler(struct mdss_panel_data *panel_data, 
		break;



	case MDSS_EVENT_UNBLANK:

		rc = hdmi_tx_enable_power(hdmi_ctrl, HDMI_TX_DDC_PM, true);

		if (rc) {

			DEV_ERR("%s: ddc power on failed. rc=%d\n",

				__func__, rc);

		} else {

			rc = hdmi_tx_power_on(panel_data);

			if (rc)

				DEV_ERR("%s: hdmi_tx_power_on failed. rc=%d\n",

					__func__, rc);

		}

		break;



	case MDSS_EVENT_PANEL_ON:
@@ -4528,6 +4529,12 @@ static int hdmi_tx_panel_event_handler(struct mdss_panel_data *panel_data, 
		break;



	case MDSS_EVENT_PANEL_OFF:

		rc = hdmi_tx_enable_power(hdmi_ctrl, HDMI_TX_DDC_PM, false);

		if (rc) {

			DEV_ERR("%s: Failed to disable ddc power\n", __func__);

			return rc;

		}



		if (hdmi_ctrl->panel_power_on) {

			hdmi_tx_config_avmute(hdmi_ctrl, 1);

			rc = hdmi_tx_power_off(panel_data);