I have apply modification and yes, now work with SDIO.
But I have a problem, imagen blink, I do not know if this is because of this modification, but I remember first tests I made with SD by SPI, and the image was perfect, did no blink.
This is configuration in source code, same I used with first test by SPI.
/* SmartMatrix configuration and memory allocation */
#define COLOR_DEPTH 24
const uint8_t kMatrixWidth = 128; // known working: 32, 64, 96, 128
const uint8_t kMatrixHeight = 32; // known working: 16, 32, 48, 64
const uint8_t kRefreshDepth = 24; // known working: 24, 36, 48 //
const uint8_t kDmaBufferRows = 2; // known working: 2-4
const uint8_t kPanelType = SMARTMATRIX_HUB75_32ROW_MOD16SCAN;
const uint8_t kMatrixOptions = (SMARTMATRIX_OPTIONS_NONE);
const uint8_t kBackgroundLayerOptions = (SM_BACKGROUND_OPTIONS_NONE);
const uint8_t kScrollingLayerOptions = (SM_SCROLLING_OPTIONS_NONE);