[v1] drm/msm: add shutdown support for display platform_driver

Sai Prakash Ranjan saiprakash.ranjan at codeaurora.org
Thu May 28 08:58:06 UTC 2020

Hi Krishna,

On 2020-05-28 14:08, Krishna Manikandan wrote:
> Define shutdown callback for display drm driver,
> so as to disable all the CRTCS when shutdown
> notification is received by the driver.

Would be nice to add some more context for adding this shutdown callback
something like below:

If the hardware is still accessing memory after SMMU translation is 
as part of smmu shutdown callback,  then the IOVAs(I/O virtual address) 
it was using will go on the bus as the physical addresses which will 
in unknown crashes (NoC/interconnect errors on QCOM SoCs).

PS: Credits for description: Robin Murphy


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