Re: [REVIEW PATCH 10/11] davinci/dm644x_ccdc: fix compiler warning

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Hi Hans,

On Mon, Mar 4, 2013 at 3:06 PM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
> On Mon March 4 2013 10:29:26 Prabhakar Lad wrote:
>> Hi Hans,
>>
>> On Mon, Mar 4, 2013 at 2:35 PM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
>> > From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
>> >
>> > drivers/media/platform/davinci/dm644x_ccdc.c: In function ‘validate_ccdc_param’:
>> > drivers/media/platform/davinci/dm644x_ccdc.c:233:32: warning: comparison between ‘enum ccdc_gama_width’ and ‘enum ccdc_data_size’ [-Wenum-compare]
>> >
>> please refer this discussion [1], where Mauro has suggested
>> few options for fixing it.
>
> Ah, good. I'll try and do a proper fix.
>
> BTW, does 'CCDC_GAMMA_BITS_15_6' mean '15 bits'? I'm not sure about the meaning
> of the '_6' suffix. Also, I assume that 'gama' in 'enum ccdc_gama_width' is a
> misspelling for 'gamma', right?
>
Its the gamma width input, Since the data resolution can be greater
than 10-bits,
the 10-bits for input to A-Law operation is specified by this bit.
'CCDC_GAMMA_BITS_15_6'
means bits 6-15 are input for A-Law operation.

Yes 'gama' in 'enum ccdc_gama_width' is misspelled.

Regards,
--Prabhakar

> Regards,
>
>         Hans
>
>>
>> Regards,
>> --Prabhakar Lad
>>
>> [1] https://patchwork.kernel.org/patch/1923091/
>>
>> > Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
>> > ---
>> >  drivers/media/platform/davinci/dm644x_ccdc.c |    2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> >
>> > diff --git a/drivers/media/platform/davinci/dm644x_ccdc.c b/drivers/media/platform/davinci/dm644x_ccdc.c
>> > index 318e805..41f0a80 100644
>> > --- a/drivers/media/platform/davinci/dm644x_ccdc.c
>> > +++ b/drivers/media/platform/davinci/dm644x_ccdc.c
>> > @@ -230,7 +230,7 @@ static int validate_ccdc_param(struct ccdc_config_params_raw *ccdcparam)
>> >         if (ccdcparam->alaw.enable) {
>> >                 if ((ccdcparam->alaw.gama_wd > CCDC_GAMMA_BITS_09_0) ||
>> >                     (ccdcparam->alaw.gama_wd < CCDC_GAMMA_BITS_15_6) ||
>> > -                   (ccdcparam->alaw.gama_wd < ccdcparam->data_sz)) {
>> > +                   (ccdcparam->alaw.gama_wd < (unsigned)ccdcparam->data_sz)) {
>> >                         dev_dbg(ccdc_cfg.dev, "\nInvalid data line select");
>> >                         return -1;
>> >                 }
>> > --
>> > 1.7.10.4
>> >
>>
--
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