braveheartleo Posted February 7, 2020 Posted February 7, 2020 Hi, Is there any reason why the card is only initialized as high speed SDHC on this board? Quote [ 3.991777] sunxi-mmc 1c0f000.mmc: Got CD GPIO [ 4.021541] sunxi-mmc 1c0f000.mmc: initialized, max. request size: 16384 KB [ 4.105871] mmc0: host does not support reading read-only switch, assuming write-enable [ 4.119279] mmc0: new high speed SDHC card at address e624 [ 4.125858] mmcblk0: mmc0:e624 SC32G 29.7 GiB [ 4.135617] mmcblk0: p1 On my phone, it is initialized as ultra high speed SDR104 SDHC. Quote [ 14.035372,7] mmc_gpio_cd_irqt: mmc cd gpio status: 1 [ 14.449389,7] mmc1: new ultra high speed SDR104 SDHC card at address e624 [ 14.450205,7] mmcblk1: mmc1:e624 SC32G 29.7 GiB [ 14.451090,7] mmcblk1: p1 [ 14.553053,6] devfreq mmc1: Couldn't update frequency transition information. I'd like to know if there's anything I need to do to maximize the card's performance on this board. Thanks.
braveheartleo Posted February 13, 2020 Author Posted February 13, 2020 (edited) After some search using a few different keywords yielded to the answers I was looking for from @tkaiser here. From that discussion, it would appear that the SD card speed was limited for stability reason. Edited February 13, 2020 by TRS-80 spacing, remove ping 1
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