When I was trying to drive a lcd(ili9881) with pwm backlight control.
I encountered with the problem in #1180.
After I check the kernel config of both raspbian OS and yocto.I find
the config of drm is different between them.
Detail of difference:
In raspbian OS, kernel conifg of drm is m while it's y in yocto.
So I change the config of drm to m in yocto too.And the pwm works fine now.
Signed-off-by: bigbearishappy <953308023@qq.com>
This allows us to drop all of the custom config patching in
linux-raspberrypi.inc. It also allows the kernel config to be checked
during the build for any discrepancies between the selected config
options and the resulting .config file - this identified that
`CONFIG_DRM_VC4` depends on `CONFIG_SND` and `CONFIG_SND_SOC`.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
