Custom kernel with gram

switchgott · Jan 5, 2014

Hi to all,please could someone explain me how to get gram working with custom kernel?
Is it possible?
Which files we need?
Big thanks

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bachera · Jan 5, 2014

it's supposedly full hardware, so no integration software's needed, but cannot confirm it.

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switchgott · Jan 5, 2014

Thanks for replay.but i guess its not activate inside cm.Look at dot stock and cm.With stock you get dot 10 hours, cm only 4.How could this be?

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bachera · Jan 5, 2014

what is dot?

many reasons why difference in battery life, analyse battery life and you find out. I get 6 hours of full charge screen on time.

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switchgott · Jan 5, 2014

Now it would realy interessting, if we have to activate this feature with kernel.
But how?
There are no technical documents about with device, driver etc?
What we have to change inside kernel source code?

sdrawkcab3 · Jan 5, 2014

djsven said:
Now it would realy interessting, if we have to activate this feature with kernel.
But how?
There are no technical documents about with device, driver etc?
What we have to change inside kernel source code?

I don't know if it's a kernel feature, but you can check to see if it's active on your device with dumpsys. I did it in terminal:

su
dumpsys SurfaceFlinger

Look for Qualcomm HWC State section. If you see DisplayPanel=9, your device is using GRAM or self panel refresh.

Edit: I'm using PAEK v5.2, and it's DisplayPanel=9. I won't be surprised if it's this way on every G2 kernel.

matheus_sc · Jan 5, 2014

I think is on, because i see some screen With 11 hrs screen on time

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switchgott · Jan 5, 2014

But not with Cm11!
I only get 4 hours screen on!
But big thanks for this info!

Qualcomm HWC state:
MDPVersion=500
DisplayPanel=9
HWC Map for Dpy: "PRIMARY"

Great!
But why i get with stock near 9 hours display on and with cm11 only 4??

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Custom kernel with gram

switchgott

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