AM5729: LCD display for RGB565

Hi Brijesh,

Thanks for your immediate response.

My customer is using AM5729 IDK board connecting to custom LCD board through 16bit LCD data and LCD_D0 ~ D15 were connected.

Only with the change in the device tree of SDK SW as below, they could not any issue in their LCD display and it works well with 16bit LCD.

For RGB16, is it default to use LCD_D0 ~ D15 in AM5729?

When they tried to apply TDM as you suggested, there was no difference with default mode.

~~~~~~~~~~~~~

// 3.3.4.9. DSS — Processor SDK Linux Documentation

// AM572x LCD display doesn't work - Processors forum - Processors - TI E2E support forums

// https://e2e.ti.com/support/processors/f/processors-forum/538207/display-port-settings-in-am5728-based-board

// https://e2e.ti.com/support/processors/f/processors-forum/556779/am572x-custom-lcd

/ {

aliases {

                     display = &lcd;

};

           lcd:display {

//                   pinctrl-names = "default";

//                   pinctrl-0 = <&lcd_pins_default>;

                     status = "okay";

                     //compatible = "osddisplays,osd070t1718-19ts", "panel-dpi";

                     compatible = "panel-dpi";

                     //compatible = "ti,tilcdc,panel";

        label = "lcd";

        backlight = <&lcd_bl>;

                     enable-gpios = <&gpio3 11 GPIO_ACTIVE_HIGH>;   // AH4.vin1a_d7.gpio3_11

                     panel-timing {

                            clock-frequency = <18000000>;   // 18 Mhz (Min. 4 Mhz) for N3/NTMini/NTA

                                hactive = <480>;

                                vactive = <272>;

                                hfront-porch = <2>;

                                hback-porch = <45>;

                                vfront-porch = <4>;

                                vback-porch = <12>;

                                hsync-len = <41>;

                                vsync-len = <10>;

                                hsync-active = <0>;

                                vsync-active = <0>;

            bpp = <16>;

            de-active = <1>;

            pixelclk-active = <1>;

        };

                     port {

                                lcd_in: endpoint {

                                           remote-endpoint = <&dpi_out>;

                                           //data-lines = <24>;

                                           data-lines = <16>;

                                };

                     };

           };

lcd_bl:backlight {

                     status = "okay";

                   compatible = "pwm-backlight";

                     // The hardware numbers these subsystems 1,2,3 but the dra7.dtsi file names them 0,1,2.

                     // https://e2e.ti.com/support/processors/f/processors-forum/665012/linux-am5728-lcd-backlight-issue

                     // TRM Pg.407

                     // PWMSS1 TP_PWMSS1_TARG 0x4843_E000

                     // PWMSS2 TP_PWMSS2_TARG 0x4844_0000

                     // PWMSS3 TP_PWMSS3_TARG 0x4844_2000

        pwms = <&ehrpwm1 0 50000 0>;            // E6.vin2a_d9.ehrpwm2A

        pwm-names = "LCD";

        /* Anything lower than 241 is no longer visible */

        brightness-levels = <0 243 245 247 249 251 252 253 255>;

        default-brightness-level = <8>;

};

&dss {

           status = "ok";

           vdda_video-supply = <&vdd_1v8_pll>;

           ports {

                     #address-cells = <1>;

                     #size-cells = <0>;

                     port@0 {

                                reg = <0>;

                                dpi_out: endpoint {

                                           remote-endpoint = <&lcd_in>;

                                           //data-lines = <24>;

                                           data-lines = <16>;

                                };

                     };

           };

};

&ehrpwm0 {

           status = "okay";

};

&epwmss0 {

           status = "okay";

};

&ehrpwm1 {

           status = "okay";

};

&epwmss1 {

           status = "okay";

};

&ehrpwm2 {

           status = "okay";

};

&epwmss2 {

           status = "okay";

};

Thanks and Best Regards,

SI.