i.MX Processors中的主题 Re: IMX6Q parallel display issue in custom board

IMX6Q parallel display issue in custom board

ASTRIHK — Fri, 24 Jul 2015 06:41:10 GMT

I have modified the boot arguments as below

setenv bootargs console=ttymxc0,115200 androidboot.console=ttymxc0 consoleblank=0 init=/init video=mxcfb2:dev=lcd,CLAA-WVGA@60,bpp=32,if=RGB24 video=mxcfb1:off video=mxcfb0:off video=mxcfb3:off vmalloc=400M androidboot.hardware=freescale cma=384M mtdparts=gpmi-nand:16m(bootloader),16m(bootimg),16m(recovery),-(root) ubi.mtd=4

and modified a little bit in imx6qdl-sabresd.dtsi

mxcfb3: fb@2 {

compatible = "fsl,mxc_sdc_fb";

disp_dev = "lcd";

interface_pix_fmt = "RGB24";

mode_str ="CLAA-WVGA";

default_bpp = <16>;

int_clk = <0>;

late_init = <0>;

status = "disabled";

};

lcd@0 {

compatible = "fsl,lcd";

ipu_id = <0>;

disp_id = <0>;

default_ifmt = "RGB24";

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_ipu1_1>;

status = "okay";

};

However, no signal is output on VSYNCH, HSYNCH & DISP0_CLK. Please kindly advise. Below is my debug print message, lcdif_probe & lcdif_init have been entered.

mxc_mipi_dsi 21e0000.mipi: i.MX MIPI DSI driver probed

MIPI DSI driver module loaded

+++++++++++++++++++++++++++++mxc_lcdif_probe++++++++++++++++++++++

+++++++++++++++++++++++++++++lcd_get_of_property++++++++++++++++++++++

mxc_sdc_fb fb.28: Can't get fb option for mxcfb0!

mxc_sdc_fb fb.29: Can't get fb option for mxcfb1!

+++++++++++++++++++++++++++++lcdif_init++++++++++++++++++++++

mxc_sdc_fb fb.30: registered mxc display driver lcd

Console: switching to colour frame buffer device 100x30

mxc_sdc_fb fb.31: Can't get fb option for mxcfb3!

imx-sdma 20ec000.sdma: no iram assigned, using external mem

imx-sdma 20ec000.sdma: loaded firmware 1.1

imx-sdma 20ec000.sdma: initialized

pfuze100-regulator 1-0008: Full lay: 2, Metal lay: 1

pfuze100-regulator 1-0008: FAB: 0, FIN: 0

pfuze100-regulator 1-0008: pfuze100 found.

Re: IMX6Q parallel display issue in custom board

jimmychan — Tue, 28 Jul 2015 06:45:42 GMT

have you try interface_pix_fmt = "RGB565"?

Re: IMX6Q parallel display issue in custom board

ASTRIHK — Tue, 28 Jul 2015 09:34:53 GMT

Solved.

Re: IMX6Q parallel display issue in custom board

jimmychan — Wed, 29 Jul 2015 06:31:47 GMT

Could you share to me how you solve the problem?

Re: IMX6Q parallel display issue in custom board

ASTRIHK — Tue, 11 Aug 2015 01:07:16 GMT

I still used 'RGB24', then related signals could be measured.

Re: IMX6Q parallel display issue in custom board

ASTRIHK — Thu, 20 Aug 2015 02:36:53 GMT

Although LCD driver can be ported, an abnormal vertical line is shown on the left hand side of the LCD. I'm sure that the LCD resolution (480*854) is set correctly. Please kindly advise.

Re: IMX6Q parallel display issue in custom board

ASTRIHK — Fri, 21 Aug 2015 07:51:51 GMT

Fixed by changing the sync variable from FB_SYNC_CLK_LAT_FALL to FB_SYNC_CLK_IDLE_EN.