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Cannot change the brightness of DM prebuild images

nan zhao
Intellectual 265 points

I use DM37 prebuild images to create a ubi.img and the boot with NAND.

but I can not change the brightness of my LCD.

Setting-->display-->brightness

Environment arguments:

setenv bootargs 'mem=71M@0x80000000 mem=128M@0x88000000 console=tty0
console=ttyS0,115200n8 androidboot.console=ttyS0 root=ubi0:rootfs rw
rootfstype=ubifs init=/init rootwait ip=off noinitrd ubi.mtd=4
omap_vout.vid1_static_vrfb_alloc=y mpurate=1000'

I dont understand why AM images work well, but for DM, there are always errors.

DM=AM+DSP? right? If so, for android images, they should be almost same.

  • 0
    TI__Guru**** 167931 points

    Power Management was not enabled on DM37x prebuilt in DevKit2.2 release. If you need those features please build rowboat from source using rowboat-froyo-dsp.xml manifest, it includes the DM37x prebuilt functionalities plus Power Management as in AM37x prebuilt, and WIFI & BT.