imx6D LVDS dual

[jiujinhong]

Hi,

目前硬件支持LVDS显示，由于时钟限制，两路LVDS并一路，通过TI DS947芯片来实现（8路LVDS DATA,1路CLK）。为什么软件中将lvds-channel@1禁止，屏幕还是显示正常？

[igorpadykov]

[Translated by Google]:

Q: At present, the hardware supports LVDS display. Due to the clock limitation,
two LVDSs are combined and implemented by TI DS947 chip (8 channels
of LVDS DATA, 1 channel of CLK). Why is lvds-channel@1 disabled in the
software and the screen still showing normal?

A:

Hi jiu

DS947 chip uses 8 channels for even odd lines, so when channel 1 is disabled

image also can be seen, though with less quality.

Best regards
igor

[jiujinhong]

A:

DS947 chip uses 8 channels for even odd lines, so when channel 1 is disabled

image also can be seen, though with less queslity.

Q: when channel 1 is disabled, channel 1 LVDS_DATA still can be transfered to DS947? Which material should i need to read so that can understand this?

[jiujinhong]

[igorpadykov]

probably one can try with sdk baremetal test (one can find zip on link https://community.nxp.com/thread/432859  ),

then compare ldb settings with linux/android.

Except Reference Manual there is no additional documentation for that mode.

[jiujinhong]

Hi Igor,

So what's the correct config for dts ? split mode?

[igorpadykov]

Hi jiu

yes it is split mode.

Best regards
igor

[jiujinhong]

Hi Igor,

We applied  patch for our bsp Patch to support uboot logo keep from uboot to kernel for NXP Linux and Android BSP (HDMI, LCD and L...   0001-Fix-the-split-mode-LVDS-panel-no-TX3-signal-issue.patch L4.1.15_GA1.2.0_uboot_logo_keep_patch_2017-01-06.zip

Once enable LVDS_SPLIT_MODE in mx6sabre_common.h, LCD seems just display half(see below photo), if Disable LVDS_SPLIT_MODE, it seems display OK.  

Linux Kernel use [ fsl,data-mapping = "spwg"], it display correct.