[Nouveau] What does the code mean?

[李金华]

Hello,





These days I am reading nouveau source code,but I cannot understand this code!

Please look at http://codepad.org/61v3mXmq .




The function ‘nouveau_dsm_power_state’ said optimus is disabled in another function ‘nouveau_switcheroo_set_state’.

But in fact,the function ‘nouveau_switcheroo_set_state’ will return directly when optimus is detected!

Both of these functions won’t disable the nv card if optimus is detected?


I got it wrong or it’s a bug? Thanks for your help!
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