Support for 64x64 panels?

I’m trying to get SmartMatrix 4 to work with a 64x64 HUB75 panel using Teensy 4.0, and Arduino 2.1.

I fired up the FeatureDemo, and set the definition to

#include <MatrixHardware_Teensy4_ShieldV5.h>        // SmartLED Shield for Teensy 4 (V5)
#include <SmartMatrix.h>

#define COLOR_DEPTH 24                  // Choose the color depth used for storing pixels in the layers: 24 or 48 (24 is good for most sketches - If the sketch uses type `rgb24` directly, COLOR_DEPTH must be 24)
const uint16_t kMatrixWidth = 64;
const uint16_t kMatrixHeight = 64;
const uint8_t kRefreshDepth = 36;
const uint8_t kDmaBufferRows = 4;
const uint8_t kPanelType = SM_PANELTYPE_HUB75_64ROW_MOD32SCAN;

and I get a lot of tearing, particularly when there’s a lot of red being displayed.

Any idea what’s going on?

Please show the clear photo of rear side of the panel. ID numbers of chips on panel also would be useful.

It’s the 64x64 matrix from Adafruit, product 5362:

You have a standard panel with 32 scans and drivers, supported by the library.
It should works fine, so test your code and connections carefully.