We have configured connected ADV7391 on VOUT2 port of AM5728. We want to display CVBS video on LCD.
Following is the HW pipeline
AM5728 DSS VOUT2(BT656) -> ADV7391(video encoder) -> LCD(CVBS)
We have followed below mentioned document to bypass video pipeline as mentioned in section 2.3.2
https://www.ti.com/lit/an/sprac16a/sprac16a.pdf
we had tried to modify in existing software driver to configure DSS BT656 for 8 bit interface.
Following is the device tree changes:
&dss {
ports {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
port@1 {
reg = <1>;
dpi_out2: endpoint {
data-lines = <16>;
remote-endpoint = <&adv7391_in>;
};
};
port@2 {
reg = <2>;
dpi_out: endpoint {
data-lines = <24>;
remote-endpoint = <&lcd_in>;
};
};
};
};
sample-panel.c changes:
static const struct panel_desc pdic_display_adv7391 = {
.modes = &pdic_display_adv7391_mode,
.num_modes = 1,
.bpc = 8,
.size = {
.width = 130,
.height = 98,
},
.bus_format = MEDIA_BUS_FMT_RGB565_1X16,
};
The changes of DSS driver Attached
Request your help in below points on software side:
-
Is it possible to run BT.656 mode with external sync?
-
What should be AM5728 configuration for DSS to output YUV422 8-bit (BT.656) with embedded sync and/or external sync?
