[igt-dev] [PATCH i-g-t v2 03/12] chamelium: Debug-print CRCs when comparing them and dumping frames

[Lyude Paul]

Reviewed-by: Lyude-Paul <lyude at redhat.com>

On Thu, 2018-12-13 at 16:55 +0100, Paul Kocialkowski wrote:
> Add debug prints for the reference and captured CRCs when comparing them
> and dumping them, which can be useful to get an idea of what is going on
> (e.g. specific noise on display cables often only changes one of the
> values that compose the CRC).
> 
> It's also useful to associate a test debug output with the dumped
> pictures (that have the CRC in their name).
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
> ---
>  lib/igt_chamelium.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/lib/igt_chamelium.c b/lib/igt_chamelium.c
> index d136fb04c342..32b859eac4a7 100644
> --- a/lib/igt_chamelium.c
> +++ b/lib/igt_chamelium.c
> @@ -1033,6 +1033,9 @@ void chamelium_assert_crc_eq_or_dump(struct chamelium
> *chamelium,
>  	char *capture_suffix;
>  	bool eq;
>  
> +	igt_debug("Reference CRC: %s\n", igt_crc_to_string(reference_crc));
> +	igt_debug("Captured CRC: %s\n", igt_crc_to_string(capture_crc));
> +
>  	eq = igt_check_crc_equal(reference_crc, capture_crc);
>  	if (!eq && igt_frame_dump_is_enabled()) {
>  		/* Grab the reference frame from framebuffer */
> @@ -1101,6 +1104,10 @@ void
> chamelium_assert_analog_frame_match_or_dump(struct chamelium *chamelium,
>  		capture_crc = chamelium_get_crc_for_area(chamelium, port, 0,
> 0,
>  							 0, 0);
>  
> +		igt_debug("Reference CRC: %s\n",
> +			  igt_crc_to_string(reference_crc));
> +		igt_debug("Captured CRC: %s\n",
> igt_crc_to_string(capture_crc));
> +
>  		reference_suffix = igt_crc_to_string_extended(reference_crc,
>  							      '-', 2);
>  		capture_suffix = igt_crc_to_string_extended(capture_crc, '-',
-- 
Cheers,
	Lyude Paul