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Tagged: eMMC Command queue
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?
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
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