Re: [PATCH v1 1/5] media: rkvdec: Disable H.264 error detection

Ezequiel Garcia
2022-06-27T17:44:50Z

Hi Hans,

On Fri, Jun 10, 2022 at 09:39:19AM -0700, Brian Norris wrote:
> On Fri, Jun 10, 2022 at 08:52:11AM -0400, Nicolas Dufresne wrote:
> > Quite often, the HW get stuck in error condition if a stream error
> > was detected. As documented, the HW should stop immediately and self
> > reset. There is likely a problem or a miss-understanding of the self
> > self reset mechanism, as unless we make a long pause, the next command
> > will then report an error even if there is no error in it.
> >
> > Disabling error detection fixes the issue, and let the decoder continue
> > after an error. This patch is safe for backport into older kernels.
> >
> > Fixes: cd33c830448b ("media: rkvdec: Add the rkvdec driver")
> > Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
>
> This is effectively how ChromeOS previously was using this hardware for
> years. When moving to the upstream/staging driver, this started giving
> us problems. This fix is helpful; we'd rather sacrifice error detection
> for now, to avoid hanging the hardware in error cases ;)
>
> Reviewed-by: Brian Norris <briannorris@chromium.org>
> Tested-by: Brian Norris <briannorris@chromium.org>

Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>

Given this is stable material, looks like we should queue it,
while the rest of the series is still being discussed.

Thanks,
Ezequiel