drm/lima: enable runtime pm
Enable runtime pm by default so GPU suspend when idle for 200ms. This value can be changed by autosuspend_delay_ms in device's power sysfs dir. On Allwinner H3 lima_device_resume takes ~40us and lima_device_suspend takes ~20us. Tested-by:Bhushan Shah <bshah@kde.org> Reviewed-by:
Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by:
Qiang Yu <yuq825@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200421133551.31481-11-yuq825@gmail.com
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