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imx8QM dual dsi spilit mode display abnormal

Question asked by NXP NXP on May 22, 2020
Latest reply on May 23, 2020 by igorpadykov

Platform:

imx8QM+Linux4.19.35+ dual mipi+yocto

 

The problem:

I use dual channel mipi display screen, but showed abnormal, try to adjust the screen parameters is invalid.

NXP can provide dual channel mipi patch file ?

and how can I solve this problem?

 

Steps are as follows:

1) TV097QXM-NU0 Signal Timing Spec

 2)Modify  panel-raydium-rm67191.c

static const struct display_timing rad_default_timing = {
.pixelclock = { 66000000, 99000000, 132000000 },
.hactive = { 1536, 1536, 1536 },
.hfront_porch = { 200, 200, 200 },
.hsync_len = { 4, 4, 4},
.hback_porch = { 200, 200, 200 },
.vactive = { 2048, 2048, 2048 },
.vfront_porch = { 14, 14, 14 },
.vsync_len = { 2, 2, 2 },
.vback_porch = { 12, 12, 12 },
.flags = DISPLAY_FLAGS_HSYNC_LOW |
DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_LOW |
DISPLAY_FLAGS_PIXDATA_NEGEDGE,
};

3)set in the boot parameters in uboot:

setenv fdt_file 'fsl-imx8qm-mek-dsi-rm67191.dtb'
saveenv

4)The results : The right half downward migration image

5)I try  pixelclock 60000000-242000000,hfront_porch100-280 hsync_len 2-8.。。。Have no effect

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