IMX6SLL and EBOOKDC4 settings

[vlintilhac]

Hello,

I have a imx6sll-evk board and i try to connect the EBOOKDC4 to it. I have install the fsl-image-validation-imx-xwayland-imx6sllevk.sdcard from the L4.9.88_2.0.0_images_MX6SLLEVK linux file.

I can't perform the unit test EPDC unit test:

>"Unable to open /dev/fb2"

During the boot I have noticed that the I2C communication with the PMIC 17135 failed:

>"0-0048 supply SENSOR not found, using dummy regulator"

>"i2c i2c-0: Max17135 PMIC not found!"

>"imx_epdc_v2_fb 20f4000.epdc: Unable to get display PMIC regulator .err = 0xfffffdfb"

I have try to set the following env. variable, but it doesn't change anything.

epdc 'video=mxcepdcfb:ED060XH2C1,bpp=16'

Do you have any idea how to fix it?

Best regards,

Vincent

[joanxie]

refer to the user guide of 4.9.88, U-Boot > setenv displayinfo 'video=mxcepdcfb:E060SCM,bpp=16
max17135:pass=2,vcom=-2030000' for an EPDC connection

if you still boot up epdc failed, try to download uboot, zimage and dtb file to the board, I found 4.9.88 has u-boot-imx6sllevk_epdc.imx, maybe you can try it, imx7d and imx6sll has the same IP , maybe you can refer to the document as below:

<https://community.nxp.com/docs/DOC-328663?commentID=37128#comment-37128 >

[vlintilhac]

Thanks for replying, but I still have the same problem.

I tried to change the environment variable as you described, but without success.

U-Boot > setenv displayinfo 'video=mxcepdcfb:E060SCM,bpp=16 max17135:pass=2,vcom=-2030000'

------------------------------

I tried to change the environment variable but I replace the panel number with what I think is the EBOOKDC4 panel number, it's still not working.

U-Boot > setenv displayinfo 'video=mxcepdcfb:ED060HX2C1,bpp=16 max17135:pass=2,vcom=-2030000'

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I tried to make a bootable sd-card using the .sdcard file, it's not working.

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I tried to make a bootable sd-card by manually partitioning the card and adding the following files:

- L4.9.88_2.0.0_images_MX6SLLEVK/u-boot-imx6sllevk_epdc.imx

- L4.9.88_2.0.0_images_MX6SLLEVK/zImage

- L4.9.88_2.0.0_images_MX6SLLEVK/zImage-imx6sll-evk.dtb

- L4.9.88_2.0.0_images_MX6SLLEVK/fsl-image-validation-imx-xwayland-imx6sllevk.tar.bz2

------------------------------

I tried to use the .sdcard image and to change the u-boot image using the UUU tool.

Board setup:

- sd-card: SD3 port

- Boot-Mode [1:0]: 01

- Boot-Switches:   CFG1[7:0]: 01000000

                               CFG2[7:0]: 001100000

                               CFG4[7:0]: 000000000

Linux command:

>sudo ./uuu /home/ubuntu/L4.9.88_2.0.0_images_MX6SLLEVK/u-boot-imx6sllevk_epdc.imx

The linux console returns:

Success 1      Failure 0

1:2      2/2 [Done                  ] SDP:done

But the Debug console returns:

Bad Linux ARM zImage magic!

----------------------------

Do you have any idea of how I can fix it.

Let me know if you need more details about the config.

Best,

Vincent

[vlintilhac · Accepted solution]

The I2C_SCL pin of the EPDC expansion port was disconnected from the board, so the I2C failed to find the PMIC Max17135 and start the EPD.

Thanks for your replies.

Vincent

[joanxie]

refer to the user guide, 4.9.88 uses mfgtool, you can download mfgtool, then replace the original image as epdc image, I attached 4.9.88 user guide, you can refer to it