linux-kernel - Re: [PATCH v3 1/2] media: atmel: atmel-isc: reworked driver and formats

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Date:   Thu, 28 Mar 2019 17:30:55 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Eugen.Hristev@...rochip.com, linux-media@...r.kernel.org,
        Nicolas.Ferre@...rochip.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, mchehab@...nel.org
Cc:     ksloat@...pglobal.com
Subject: Re: [PATCH v3 1/2] media: atmel: atmel-isc: reworked driver and
 formats

Hi Eugen,

On 3/28/19 4:32 PM, Eugen.Hristev@...rochip.com wrote:
> From: Eugen Hristev <eugen.hristev@...rochip.com>
> 
> This change is a redesign in the formats and the way the ISC is
> configured w.r.t. sensor format and the output format from the ISC.
> I have changed the splitting between sensor output (which is also ISC input)
> and ISC output.
> The sensor format represents the way the sensor is configured, and what ISC
> is receiving.
> The format configuration represents the way ISC is interpreting the data and
> formatting the output to the subsystem.
> Now it's much easier to figure out what is the ISC configuration for input, and
> what is the configuration for output.
> The non-raw format can be obtained directly from sensor or it can be done
> inside the ISC. The controller format list will include a configuration for
> each format.
> The old supported formats are still in place, if we want to dump the sensor
> format directly to the output, the try format routine will detect and
> configure the pipeline accordingly.
> This also fixes the previous issues when the raw format was NULL which
> resulted in many crashes for sensors which did not have the expected/tested
> formats.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>

I'm getting a few smatch warnings/errors:

drivers/media/platform/atmel/atmel-isc.c:1368 isc_try_fmt() error: we previously assumed 'sd_fmt' could be null (see line 1343)
drivers/media/platform/atmel/atmel-isc.c:1078:35: warning: variable 'rgb' set but not used [-Wunused-but-set-variable]
drivers/media/platform/atmel/atmel-isc.c:1078:22: warning: variable 'yuv' set but not used [-Wunused-but-set-variable]

Can you take a look?

Thanks!

	Hans