linux-kernel - Re: [PATCH 0/2] Follow-up patches for Cedrus v9

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Date:   Sat, 8 Sep 2018 12:06:15 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Paul Kocialkowski <contact@...lk.fr>, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Chen-Yu Tsai <wens@...e.org>, linux-sunxi@...glegroups.com,
        Randy Li <ayaka@...lik.info>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 0/2] Follow-up patches for Cedrus v9

On 09/07/2018 06:33 PM, Paul Kocialkowski wrote:
> This brings the requested modifications on top of version 9 of the
> Cedrus VPU driver, that implements stateless video decoding using the
> Request API.
> 
> Paul Kocialkowski (2):
>   media: cedrus: Fix error reporting in request validation
>   media: cedrus: Add TODO file with tasks to complete before unstaging
> 
>  drivers/staging/media/sunxi/cedrus/TODO     |  7 +++++++
>  drivers/staging/media/sunxi/cedrus/cedrus.c | 15 ++++++++++++---
>  2 files changed, 19 insertions(+), 3 deletions(-)
>  create mode 100644 drivers/staging/media/sunxi/cedrus/TODO
> 

So close...

When compiling under e.g. intel I get errors since it doesn't know about
the sunxi_sram_claim/release function and the PHYS_PFN_OFFSET define.

Is it possible to add stub functions to linux/soc/sunxi/sunxi_sram.h
if CONFIG_SUNXI_SRAM is not defined? That would be the best fix for that.

The use of PHYS_PFN_OFFSET is weird: are you sure this is the right
way? I see that drivers/of/device.c also sets dev->dma_pfn_offset, which
makes me wonder if this information shouldn't come from the device tree.

You are the only driver that uses this define directly, which makes me
suspicious.

Regards,

	Hans