Re: [PATCH v4] fpga manager: Add Altera CvP driver

From: Alan Tull
Date: Wed May 03 2017 - 10:20:37 EST

On Tue, May 2, 2017 at 7:14 PM, Anatolij Gustschin <agust@xxxxxxx> wrote:
> On Wed, 3 May 2017 00:28:17 +0300
> Andy Shevchenko andy.shevchenko@xxxxxxxxx wrote:
> ...
>>>>Is 0xff a mask here? (Btw, you missed spaces around <<)
>>> yes, it is. Will add spaces (checkpatch didn't warn here).
>>Then it makes sense to add _MASK and use GENMASK() instead of direct value.
> ok, will do.
>>>>Why do we need that?!
>>>>In new drivers we try to avoid new module parameters. We have enough
>>>>interfaces nowadays to let driver know some details (quirks).
>>> Which interface is preffered here? Do you suggest sysfs? Won't be able
>>> to pass the parameter on kernel command line, then.
>>Yes, my question here is to understand what so important that driver
>>needs module parameter.
>>Can you elaborate?
> the driver doesn't need this parameter, but it could help testing
> the loading of compressed or encrypted images.

Loading encrypted or compressed images can be keyed off of flags in
fpga_image_info. Currently we have FPGA_MGR_ENCRYPTED_BITSTREAM Will
need to add one for compressed such as FPGA_MGR_COMPRESSED_BITSTREAM