* edid-decode: Incorrect decoding of CTA extension if it does not contain padding bytes
@ 2020-09-11 18:27 Pavel Kuzmin
2020-09-11 21:56 ` Hans Verkuil
0 siblings, 1 reply; 2+ messages in thread
From: Pavel Kuzmin @ 2020-09-11 18:27 UTC (permalink / raw)
To: linux-media
Hello
If in the EDID CTA extension the last 18 byte DTD block ends
immediately before the checksum byte (no padding bytes) then the last
DTD block is not processed and a failure is displayed "Padding:
CTA-861 padding contains non-zero bytes."
e.g. https://github.com/linuxhw/EDID/blob/master/Digital/Acer/ACR0549/42BFE4422CEF
Regards,
Pavel
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: edid-decode: Incorrect decoding of CTA extension if it does not contain padding bytes
2020-09-11 18:27 edid-decode: Incorrect decoding of CTA extension if it does not contain padding bytes Pavel Kuzmin
@ 2020-09-11 21:56 ` Hans Verkuil
0 siblings, 0 replies; 2+ messages in thread
From: Hans Verkuil @ 2020-09-11 21:56 UTC (permalink / raw)
To: Pavel Kuzmin, linux-media
Hi Pavel,
On 11/09/2020 20:27, Pavel Kuzmin wrote:
> Hello
>
>
> If in the EDID CTA extension the last 18 byte DTD block ends
> immediately before the checksum byte (no padding bytes) then the last
> DTD block is not processed and a failure is displayed "Padding:
> CTA-861 padding contains non-zero bytes."
Thanks for reporting this, nice catch!
It was caused by an off-by-one check and this is now fixed.
Regards,
Hans
>
> e.g. https://github.com/linuxhw/EDID/blob/master/Digital/Acer/ACR0549/42BFE4422CEF
>
>
> Regards,
> Pavel
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-09-11 18:27 edid-decode: Incorrect decoding of CTA extension if it does not contain padding bytes Pavel Kuzmin
2020-09-11 21:56 ` Hans Verkuil
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