LCD 8-bit data port mux/mapping [SOLVED]

[matkattanek]

Using currently imx6ul and trying to setup the lcd data port to run the  display over an 8-bit data port only.

When setting up the DTS file using  LCD_DATA16 through LCD_DATA23 I do not see any bit changes on the data

line:

        pinctrl_lcdif_dat: lcdifdatgrp {
            fsl,pins = <
                MX6UL_PAD_LCD_DATA16__LCDIF_DATA16  0x79
                MX6UL_PAD_LCD_DATA17__LCDIF_DATA17  0x79
                MX6UL_PAD_LCD_DATA18__LCDIF_DATA18  0x79
                MX6UL_PAD_LCD_DATA19__LCDIF_DATA19  0x79
                MX6UL_PAD_LCD_DATA20__LCDIF_DATA20  0x79
                MX6UL_PAD_LCD_DATA21__LCDIF_DATA21  0x79
                MX6UL_PAD_LCD_DATA22__LCDIF_DATA22  0x79
                MX6UL_PAD_LCD_DATA23__LCDIF_DATA23  0x79

            >;
        };

It seems like the bit controls are frozen. It works fine though when using LCD_DATA01 through LCD_DATA07.

Unfortunately I cant use these lines (0-7) on the final board, since I need to mux other signals.

Does someone have an idea how to setup this up properly?

[igorpadykov]

Hi mat

eLCDIF output data is described in Table 32-3. Pin use in MPU Mode and VSYNC Mode,

Table 32-4. Pin use in DOTCLK Mode and DVI Mode i.MX6UL Reference Manual, seems there

is no option to map 8-bit data port other than LCD_DATA01-07.

http://www.nxp.com/docs/en/reference-manual/IMX6ULRM.pdf 

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[matkattanek]

Thanks Igor for the quick response, that was very helpful.