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| author | Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> | 2017-09-06 17:14:58 -0700 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-09-11 16:03:57 +0300 |
| commit | 0bb9c2b27f5e503e683ad27a0f0a6286f5b5da34 (patch) | |
| tree | 13a0cb3d28a6c0d135fbe52273768c26838b787c /Documentation/gpu | |
| parent | 8a50b9bd5679d5788f2f7add576fbd8e3ad6fed6 (diff) | |
| download | blackbird-op-linux-0bb9c2b27f5e503e683ad27a0f0a6286f5b5da34.tar.gz blackbird-op-linux-0bb9c2b27f5e503e683ad27a0f0a6286f5b5da34.zip | |
drm/dp/mst: Sideband message transaction to power up/down nodes
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.
v2: Fix memory leak (Lyude)
Cc: Lyude <lyude@redhat.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170907001458.9399-1-dhinakaran.pandiyan@intel.com
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Diffstat (limited to 'Documentation/gpu')
0 files changed, 0 insertions, 0 deletions
