LVDS issue

[lifusong]

dear sir.

    our lvds can who something.but ,have some problem,please see below pic.

how to fix this.

our lvds work on 800x480  18bit ,boot args is  video=mxcfb0:dev=ldb,if=RGB666,fbpix=RGB24 vmalloc=400M,

and use if=rgb24,this image is more worse.

[igorpadykov]

Hi li

for 800x480 lvds settings one can look at nitrogen board

Universal Boot Loader general discussion ()

[PATCH 17/32] nitrogen6x: display: add wvga-lvds panel

Theory&Example :

AN3974 Different Display Configurations on i.MX35 Linux PDK

how to support WSVGA output in imx6sdq

Best regards

igor

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[lifusong]

our board is mx6q,and android version is 4.4.3_r1.  kernel 3.10.53  u-boot 2014.04

below is the u-boot seting.

static struct display_info_t const displays[] = {{

  .bus = -1,

  .addr = 0,

  .pixfmt = IPU_PIX_FMT_RGB666,

  .detect = NULL,

  .enable = NULL,

  .mode = {

  .name           = "Hannstar-XGA",

  .refresh        = 60,

  .xres           = 800,//1024,

  .yres           = 480,//768,

  .pixclock       = 19531,//15385,

  .left_margin    = 160,//220,

  .right_margin   = 160,//40,

  .upper_margin   = 18,//21,

  .lower_margin   = 18,//7,

  .hsync_len      = 60,

  .vsync_len      = 10,

  .sync           = FB_SYNC_EXT,

  .vmode          = FB_VMODE_NONINTERLACED

} }

below is the kernel device tree seting

	lvds-channel@0 {
		crtc = "ipu2-di0";
		status = "okay";
		fsl,data-mapping = "spwg";
		fsl,data-width = <18>;

		display-timings {
			native-mode = <&timing0>;
			timing0: hsd100pxn1 {
				clock-frequency = <65000000>;
				hactive = <800>;
				vactive = <480>;
				hback-porch = <160>;
				hfront-porch = <160>;
				vback-porch = <18>;
				vfront-porch = <18>;
				hsync-len = <60>;
				vsync-len = <10>;
			};
		};
	};

[lifusong]

Dear sir.

   in that link.Universal Boot Loader general discussion ()

what is the base version?

I can't found the match line in u-boot 2014.04