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发表于 2020-9-28 09:38:52 4686 浏览 0 回复

MT6761/MT6762/MT6765 How to trigger MRDUMP_KEY

长按power key 就可以触发dump,对于解决卡死类的问题有帮助

how to enable?

1、Please find out the platform dts file
  1. example:kernel-4.9/arch/arm64/boot/mediatek/mt6761.dts
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2、search for mrdump key word and you will see below text
  1.   mrdump_ext_rst: mrdump_ext_rst {
  2. compatible = "mediatek, mrdump_ext_rst-eint";(注意mediatek, mrdump_ext_rst-eint中逗号之后有个空格)
  3. source = "EINT";
  4. mode = "IRQ";
  5. status = "okay";
  6. };
  7. Change as below, saved and rebuild bootimage

  8. mrdump_ext_rst: mrdump_ext_rst {
  9. compatible = "mediatek, mrdump_ext_rst-eint";
  10. source = "SYSRST";
  11. mode = "IRQ";
  12. status = "okay";
  13. };
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3、How to trigger MRDUMP_KEY

  1. Please long press power key(you may use power + volumn up , but need another patch) for around 9 seconds

  2. Please do have a watch on hand to confirm the time in seconds

  3. Please do not press longer than 15 seconds , if press too long , external PMIC will recognize as battery lost and everything is lost
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