diff options
| author | Matt Roper <[email protected]> | 2020-09-30 23:39:17 -0700 |
|---|---|---|
| committer | Lucas De Marchi <[email protected]> | 2020-10-05 15:54:45 -0700 |
| commit | f9c730ede7d3f40900cb493890d94d868ff2f00f (patch) | |
| tree | bad4c2f82a85bee281992f9d3d202fc4bfac3e21 /drivers/gpu/drm/i915/display/intel_dp_mst.c | |
| parent | b1e93a85f8e969721e1e28766ab54e84ba35c24e (diff) | |
drm/i915/dg1: Wait for pcode/uncore handshake at startup
DG1 does some additional pcode/uncore handshaking at
boot time; this handshaking must complete before various other pcode
commands are effective and before general work is submitted to the GPU.
We need to poll a new pcode mailbox during startup until it reports that
this handshaking is complete.
The bspec doesn't give guidance on how long we may need to wait for this
handshaking to complete. For now, let's just set a really long timeout;
if we still don't get a completion status by the end of that timeout,
we'll just continue on and hope for the best.
v2 (Lucas): Rename macros to make clear the relation between command and
result (requested by José)
Bspec: 52065
Cc: Clinton Taylor <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Cc: Radhakrishna Sripada <[email protected]>
Signed-off-by: Matt Roper <[email protected]>
Signed-off-by: Lucas De Marchi <[email protected]>
Reviewed-by: José Roberto de Souza <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_mst.c')
0 files changed, 0 insertions, 0 deletions