[Intel-gfx] [PATCH v2 4/6] drm: scrambling support in drm layer

[Jani Nikula]

On Tue, 07 Feb 2017, Jose Abreu <Jose.Abreu at synopsys.com> wrote:
> Hi Jani,
>
>
> On 07-02-2017 13:35, Jani Nikula wrote:
>> On Tue, 07 Feb 2017, Jose Abreu <Jose.Abreu at synopsys.com> wrote:
>>>> +bool drm_scdc_check_scrambling_status(struct i2c_adapter *adapter)
>>>> +{
>>>> +	u8 status;
>>>> +	int ret;
>>>> +
>>>> +	ret = drm_scdc_readb(adapter, SCDC_SCRAMBLER_STATUS, &status);
>>>> +	if (ret < 0) {
>>>> +		DRM_ERROR("Failed to read scrambling status, error %d\n", ret);
>>>> +		return false;
>>>> +	}
>>>> +
>>>> +	return status & SCDC_SCRAMBLING_STATUS;
>>> "return (status & SCDC_SCRAMBLING_STATUS) > 0;" ?
>> What's the point in that?
>>
>> BR,
>> Jani.
>>
>>
>
> Sorry, I didn't see the SCDC_SCRAMBLING_STATUS is BIT(0). Anyway,
> my intention was to return either 1 or 0 or else the value of the
> "and" would be returned. I think in x86 the bool is char, what
> could happen if SCDC_SCRAMBLING_STATUS was BIT(>7)? Does the cast
> work as expected?

The implicit type conversion works just fine.

BR,
Jani.

>
> Best regards,
> Jose Miguel Abreu
>

-- 
Jani Nikula, Intel Open Source Technology Center