Can Verdin AM62 + Mallow Carrier Board Support Dual-Channel LVDS?

Technical Support
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Hi Toradex Team,

Display :

I’m using the Verdin AM62 SoM along with the Mallow Carrier Board, and I have an LVDS display panel that requires dual-channel LVDS

I noticed in the Mallow datasheet that there’s an LVDS Display Connector (X12) and a Capacitive Touch Connector (X13). It also mentions using JP1 to power the backlight.

However, I’m a bit confused:

  • Does the Mallow Carrier Board support dual-channel LVDS output directly?
  • If yes, could you guide me through the steps (e.g., pinout, Device Tree setup, video timings)?
  • If not, do I need to use the Verdin LVDS Mezzanine board to enable dual-channel LVDS support?

Would really appreciate a bit of clarity on the hardware and software side.

Thanks in advance!
Uday

2

Hi, I’m the Toradex AI Assistant. The Toradex Support team will follow up with you shortly!

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Hello!

The Mallow Carrier Board, when paired with the Verdin AM62, supports LVDS display output through a DSI-to-LVDS bridge configuration. Here’s a concise overview:

  1. DSI-to-LVDS Bridge Configuration:

    • The Texas Instruments SN65DSI84-Q1 DSI to LVDS bridge can be set up for dual-channel LVDS output, supporting resolutions up to 1080p60 with 24-bit color in dual-channel mode. You can find more details in the Toradex documentation.

  2. LVDS Interface Layout Requirements:

    • Ensure proper length matching between the clock pair and data signals.
    • The maximum frequency is contingent on the display resolution, with the frequency being seven times higher than the pixel clock in single-channel mode.
    • Maintain a trace impedance of 100Ω ±15% differential and 55Ω ±15% single-ended.

  3. Connectivity Considerations:

    • The DSI to LVDS bridge requires configuration via I2C.
    • Use the PWM_3_DSI pin (19) for display brightness control.
    • The I2S_2_D_OUT can be utilized for enabling the display backlight.

Setting Up Dual-Channel LVDS:

  1. Hardware Setup:

    • Connect your display to the LVDS Display Connector (X12).
    • Ensure JP1 is configured correctly for backlight power.
    • If using touch functionality, connect the touch interface to X13. More information can be found in the Toradex community discussion.

  2. Software Configuration:

    • Apply the appropriate device tree overlay for your specific display configuration. For instance, a 10.1" LVDS display might use an overlay like “verdin-am62_panel-cap-touch-10inch-lvds_overlay.dtbo.”

I recommend reviewing the specific requirements of your LVDS display panel to ensure compatibility with these specifications.

If you have any further questions or need more details, feel free to ask!

Best regards,
Toradex AI Assistant

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Hi @Uday10122!

I saw you liked the AI’s answer. Were you able to solve your issue?

Best regards.
Lucas Azeituno