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SN65DSI85EVM: SN65DSI85: Issue with displaying Test Image pattern

6567992
Prodigy 10 points
Other Parts Discussed in Thread: SN65DSI85, DSI-TUNER

Hello,

I am trying to display the test pattern with SN65DSI85, the settings are as follows, Problem is no test pattern displayed on the display. Can you provide pointers to debug this issue?

Attached the data sheet of the screen and DSi-tuner config (dsi + lvds)


)



S231AJ1-LE1-INNOLUX.pdf

  • 0
    TI__Mastermind 35130 points

    Hi,

    This display datasheet is very confusing. From the interface timing table on page 18 it looks like the resolution is 512x1920, but the spec table on page 5 says 158x1920, which does not make sense. Can you check with Innolux what the exact timing specifications for this display should be?

    Regards,

    I.K.

  • 0
    Prodigy 10 points

    Hello;
    Here is the configuration I had made to make the screen work on another project;

                fsl,data-mapping = "jeida"; // fsl,data-mapping = "jeida";
                fsl,data-width = <24>;
                primary;
                status = "okay";
                display-timings {
                        native-mode = <&timing0>;
                        timing0: S231AJ1 {
                                clock-frequency = <74250000>;
                                hactive = <256>;
                                vactive = <1920>;
                                hback-porch = <150>;
                                hfront-porch = <150>;
                                vback-porch = <20>;
                                vfront-porch = <20>;
                                hsync-len = <72>;
                                vsync-len = <8>;
                        };

  • 0 in reply to 6567992
    TI__Mastermind 35130 points

    Hi,

    I replied to this last night but for some reason it did not post. It looks like your display panel is single-channel LVDS. In which case you can use those timing settings that worked previously, but reference this video to correctly configure the DSI-Tuner: https://training.ti.com/configuring-sn65dsi8x-single-channel-dsi-single-link-lvds-operation 

    Regards,

    I.K.