Home Forum Software discussion How to enable eMMC Command queue

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  • #112215
    ken858010
    Participant

    Hello,

    I want to use eMMC Command queue features to practice on MACCHIATObin double Shot platform,

    The eMMC version is 5.1 and CMD Queue function is supported,

    but read /sys/bus/mmc/devices/mmc0\:0001/cmdq_en show disable (0),

    I don’t know why the CMD Queue cannot be automatically activated after boot up , or need to other setting?

    #112218
    nanasi
    Participant

    Hi,
    Unfortunately, “Command Queuing” is optional.
    The extcsd from chip(8GME4R) is “Not-supported”.

    # mmc extcsd read /dev/mmcblk0 | grep CMDQ
    Command Queue Support [CMDQ_SUPPORT]: 0x00
    Command Queue Depth [CMDQ_DEPTH]: 1
    Command Enabled [CMDQ_MODE_EN]: 0x00
    # 
Viewing 2 posts - 1 through 2 (of 2 total)
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