[question]Implemention of drm_driver.dumb_create

[Rongrong Zou]

Hi, all

     I want to implement memory management for my new drm driver,
it is for a display controller attached to PCIe bus of our SOC,
however, I found two kind of implementions in existing kernel drivers:

one is implemented with gem + ttm, such as bochs/cirrus/amdgpu,
the other is implemented with gem only, such as intel i915/exynos;
so which way should i choose, can someone give me some advice?
thanks!

-- 
Regards, Rongrong