diff options
| author | Nicholas Kazlauskas <[email protected]> | 2024-03-07 19:50:00 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2024-03-22 19:49:38 +0000 |
| commit | 8803bfffb7f81a6e62950ce772bd4d02b02b1adf (patch) | |
| tree | 0ded8aafcf68c36fa3a806524d5551e23a58d09d /drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | |
| parent | drm/amd/display: Detect and disallow idle reallow during reentrancy (diff) | |
| download | kernel-8803bfffb7f81a6e62950ce772bd4d02b02b1adf.tar.gz kernel-8803bfffb7f81a6e62950ce772bd4d02b02b1adf.zip | |
drm/amd/display: Add optional optimization for IPS handshake
[Why]
It's possible to skip parts of the eval and exit sequencing if we know
whether DCN is in IPS2 already or if it's committed to going to idle
and not in IPS2.
[How]
Skip IPS2 entry/exit if DMCUB is idle but the IPS2 commit is not set.
Skip the eval delay if DMCUB is already in IPS2 since we know we need
to exit.
These are turned off by default.
Reviewed-by: Duncan Ma <[email protected]>
Acked-by: Wayne Lin <[email protected]>
Signed-off-by: Nicholas Kazlauskas <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c index 4878e9e50440..12c142cae78b 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c @@ -1318,13 +1318,16 @@ static void dc_dmub_srv_exit_low_power_state(const struct dc *dc) */ dc_dmub_srv->needs_idle_wake = false; - if (prev_driver_signals.bits.allow_ips2) { + if (prev_driver_signals.bits.allow_ips2 && + (!dc->debug.optimize_ips_handshake || + ips_fw->signals.bits.ips2_commit || !ips_fw->signals.bits.in_idle)) { DC_LOG_IPS( "wait IPS2 eval (ips1_commit=%d ips2_commit=%d)", ips_fw->signals.bits.ips1_commit, ips_fw->signals.bits.ips2_commit); - udelay(dc->debug.ips2_eval_delay_us); + if (!dc->debug.optimize_ips_handshake || !ips_fw->signals.bits.ips2_commit) + udelay(dc->debug.ips2_eval_delay_us); if (ips_fw->signals.bits.ips2_commit) { DC_LOG_IPS( |