My customer is using android jb4.2.2_1.1.0 (L3.0.35) of i.MX6DQ.
When the "mmc_sd_init_card" function in kernel_imx/src/drivers/mmc/core/sd.c doesn't call "mmc_sd_switch_hs function", which mode does the SD card work?
- SD/SDIO full speed mode (up to 25 MHz)
- SD/SDIO high speed mode (up to 50 MHz)
- SD/SDIO UHS-I mode (up to 208Mhz in SDR mode, up to 50Mhz in DDR mode)
And, when mmc_sd_switch(card,1,0,1,status) function is not called, is there an bad effect?