linux-kernel - Re: [PATCH v11 00/11] Rockchip ISP Driver

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Date:   Mon, 18 Nov 2019 15:52:01 -0300
From:   Ezequiel Garcia <ezequiel@...labora.com>
To:     Hans Verkuil <hverkuil@...all.nl>,
        Helen Koike <helen.koike@...labora.com>,
        linux-rockchip@...ts.infradead.org
Cc:     mark.rutland@....com, devicetree@...r.kernel.org,
        eddie.cai.linux@...il.com, mchehab@...nel.org, heiko@...ech.de,
        linux-arm-kernel@...ts.infradead.org, gregkh@...uxfoundation.org,
        jeffy.chen@...k-chips.com, zyc@...k-chips.com,
        linux-kernel@...r.kernel.org, tfiga@...omium.org,
        robh+dt@...nel.org, hans.verkuil@...co.com,
        laurent.pinchart@...asonboard.com, sakari.ailus@...ux.intel.com,
        kernel@...labora.com, linux-media@...r.kernel.org,
        jacob-chen@...wrt.com, zhengsq@...k-chips.com
Subject: Re: [PATCH v11 00/11] Rockchip ISP Driver

Hi Hans,

Thanks for taking care of this.

On Thu, 2019-11-14 at 09:42 +0100, Hans Verkuil wrote:
> On 11/14/19 6:12 AM, Helen Koike wrote:
> > Hello,
> > 
> > This series adds the Rockchip Image Signal Processing Unit v1 driver to
> > staging.
> > 
> > The main reason to be in staging is that people are already using it from the
> > mailing list (including libcamera), and having it in mainline makes the workflow
> > easier. Also, it is easier for other people to contribute back (with code
> > or testing the driver).
> > 
> > We plan to actively work on this driver to get it our of staging.
> > 
> > This patchset is also available at:
> > https://gitlab.collabora.com/koike/linux/tree/rockchip/isp/v11
> > 
> > Libcamera patched to work with this version:
> > https://gitlab.collabora.com/koike/libcamera
> > (also sent to the mailing list)
> > 
> > The major difference in v11 are:
> > - Fixed compiling warnings found with W=1
> > - Fixed checkpatch errors
> > - Add clock-names values in dt-bindings
> 
> Looking at checkpatch I see a few remaining issues that I believe should be
> fixed before merging this:
> 
> CHECK: spinlock_t definition without comment
> #575: FILE: drivers/staging/media/rkisp1/isp_stats.h:43:
> +       spinlock_t irq_lock;
> 
> CHECK: struct mutex definition without comment
> #581: FILE: drivers/staging/media/rkisp1/isp_stats.h:49:
> +       struct mutex wq_lock;
> 
> CHECK: spinlock_t definition without comment
> #1648: FILE: drivers/staging/media/rkisp1/isp_params.h:25:
> +       spinlock_t config_lock;
> 
> CHECK: spinlock_t definition without comment
> #2058: FILE: drivers/staging/media/rkisp1/capture.h:145:
> +       spinlock_t vbq_lock;
> 

I'd rather merge this as-is, adding a TODO entry stating
we need to revisit locking specifically, because I'd like
to take a close look at these spinlocks/mutex,
instead of just addding comments for then.

> Once this is done together with the Jacob Chen email clarification
> it is ready to be merged for v5.6.
> 

I'll find out more about this.

> It passes all the sparse/smatch tests, so that's very good.
> 

Great!

Thanks,
Ezequiel