[Intel-gfx] [PATCH 1/2] drm/dp/mst: Sideband message transaction to power up/down nodes

[Stefan Assmann]

On 2017-09-05 18:26, Dhinakaran Pandiyan wrote:
> The POWER_DOWN_PHY and POWER_UP_PHY sideband message transactions allow
> the source to reqest any node in a mst path or a whole path to be
> powered down or up. This allows drivers to target a specific sink in the
> MST topology, an improvement over just power managing the imediate
> downstream device. Secondly, since the request-reply protocol waits for an
> ACK, we can be sure that a downstream sink has enough time to respond to a
> power up/down request.
> 
> Cc: Lyude <lyude at redhat.com>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Harry Wentland <harry.wentland at amd.com>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>

Tested-by: Stefan Assmann <sassmann at redhat.com>