evie/android_kernel_oneplus_msm8998
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msm: mdss: hdmi: enable ddc gpios before any ddc transaction

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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: Ajay Singh Parmar <aparmar@codeaurora.org>
This commit is contained in:
Ajay Singh Parmar 2016-01-20 16:36:14 -08:00 • committed by David Keitel
parent 8d4fa5ef98
commit 501c2659d0
1 changed files with 15 additions and 8 deletions
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23
drivers/video/fbdev/msm/mdss_hdmi_tx.c
View file

@ -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_power_on(panel_data);
if (rc)
DEV_ERR("%s: hdmi_tx_power_on failed. rc=%d\n",
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);