Hello All
Currently I am using a HDMI for mirror display on an sabresd board with
Android L. The system is able to mirror the displays on android bootup.
Here we observe a performance issues when the HDMI is enabled.
This issue is seen with/without the HDMI display connected.
The performance issue is seen as slowly response on icon launching and
other user operations. Also the notification for the HDMI connected is not raised.
During debugging this issue, we found that the at the driver level the
hotplug events are not received from the HDMI connector(HDMI_HPD pin), Since the
hot plug events are not received by the driver the system is unable to
power down/ deinit / disconnect the HDMI display device , thus the android system is
continuously trying to mirror the display. Further analyzing the driver
we found that the interrupt configuration is correct.
We also diverged into enabling the hdcp for the driver, but that too is
unable to get the interrupt from the HDMI connector.
The configuration in the device tree is as folows
&hdmi_audio {
status = "okay";
};
&hdmi_cec {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hdmi_cec_2>;
status = "okay";
};
&hdmi_core {
ipu_id = <0>;
disp_id = <0>;
status = "okay";
};
&hdmi_video {
fsl,phy_reg_vlev = <0x0294>;
fsl,phy_reg_cksymtx = <0x800d>;
status = "okay"
};
&i2c2 {
clock-frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c2_1>;
status = "okay";
#if 1
hdmi: edid@50 {
compatible = "fsl,imx6-hdmi-i2c";
reg = <0x50>;
};
#endif
};
Regards,
Karan
