Thread (30 messages) 30 messages, 6 authors, 2019-08-12

Re: [PATCH 1/7] media: cedrus: Disable engine after each slice decoding

From: Ezequiel Garcia <hidden>
Date: 2019-08-12 13:28:23
Also in: linux-media, lkml

Hi Jernej,

On Mon, 2019-06-03 at 13:38 +0200, Maxime Ripard wrote:
Hi,

On Thu, May 30, 2019 at 11:15:10PM +0200, Jernej Skrabec wrote:
quoted
libvdpau-sunxi always disables engine after each decoded slice.
Do same in Cedrus driver.

Presumably this also lowers power consumption which is always nice.

Signed-off-by: Jernej Skrabec <redacted>
Is it fixing anything though?

I indeed saw that cedar did disable it everytime, but I couldn't find
a reason why.

Also, the power management improvement would need to be measured, it
can even create the opposite situation where the device will draw more
current from being woken up than if it had just remained disabled.
While reviewing this, I'm noticing that cedrus_engine_disable can
be marked for static storage (with or without this patch).

Regards,
Eze


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