[PATCH v2 10/33] drm/modes: Add a function to generate analog display modes

Thomas Zimmermann tzimmermann at suse.de
Fri Sep 23 10:16:13 UTC 2022


Hi

Am 23.09.22 um 11:18 schrieb Jani Nikula:
> On Fri, 23 Sep 2022, Thomas Zimmermann <tzimmermann at suse.de> wrote:
>> Am 22.09.22 um 16:25 schrieb Maxime Ripard:
>>> +	drm_dbg_kms(dev,
>>> +		    "Generating a %ux%u%c, %u-line mode with a %lu kHz clock\n",
>>> +		    hactive, vactive,
>>> +		    interlace ? 'i' : 'p',
>>> +		    params->num_lines,
>>> +		    pixel_clock_hz / 1000);
>>
>> Divide by HZ_PER_KHZ here and in other places.
>>
>>     https://elixir.bootlin.com/linux/latest/source/include/linux/units.h#L23
> 
>  From the Department of Bikeshedding:
> 
> I find "pixel_clock_hz / 1000" has much more clarity than
> "pixel_clock_hz / HZ_PER_KHZ".

This one's easy to see because it tells you with the _hz postfix. Many 
places don't and then it quickly gets confusing what units the code's 
converting.

Best regards
Thomas

> 
> I don't consider the SI prefixes magic numbers.
> 
> 
> BR,
> Jani.
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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