diff options
| author | Leo Chen <[email protected]> | 2024-10-03 16:20:23 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2024-10-15 15:23:31 +0000 |
| commit | 0fe33e115fec305c35c66b78ad26e3755ab54b9c (patch) | |
| tree | 40372dfb6d0ffc4b33d8fc7707f0c49e0849e0ce /drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | |
| parent | drm/amd/display: Fix Coverity change for visual confirm (diff) | |
| download | kernel-0fe33e115fec305c35c66b78ad26e3755ab54b9c.tar.gz kernel-0fe33e115fec305c35c66b78ad26e3755ab54b9c.zip | |
drm/amd/display: Full exit out of IPS2 when all allow signals have been cleared
[Why]
A race condition occurs between cursor movement and vertical interrupt control
thread from OS, with both threads trying to exit IPS2.
Vertical interrupt control thread clears the prev driver allow signal while not fully
finishing the IPS2 exit process.
[How]
We want to detect all the allow signals have been cleared before we perform the full exit.
Reviewed-by: Nicholas Kazlauskas <[email protected]>
Signed-off-by: Leo Chen <[email protected]>
Signed-off-by: Roman Li <[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 | 6 |
1 files changed, 4 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 8486c144d81c..f0417ee6fcf8 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c @@ -1295,6 +1295,8 @@ static void dc_dmub_srv_notify_idle(const struct dc *dc, bool allow_idle) memset(&new_signals, 0, sizeof(new_signals)); + new_signals.bits.allow_idle = 1; /* always set */ + if (dc->config.disable_ips == DMUB_IPS_ENABLE || dc->config.disable_ips == DMUB_IPS_DISABLE_DYNAMIC) { new_signals.bits.allow_pg = 1; @@ -1390,7 +1392,7 @@ 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 || prev_driver_signals.all == 0) && (!dc->debug.optimize_ips_handshake || ips_fw->signals.bits.ips2_commit || !ips_fw->signals.bits.in_idle)) { DC_LOG_IPS( @@ -1451,7 +1453,7 @@ static void dc_dmub_srv_exit_low_power_state(const struct dc *dc) } dc_dmub_srv_notify_idle(dc, false); - if (prev_driver_signals.bits.allow_ips1) { + if (prev_driver_signals.bits.allow_ips1 || prev_driver_signals.all == 0) { DC_LOG_IPS( "wait for IPS1 commit clear (ips1_commit=%u ips2_commit=%u)", ips_fw->signals.bits.ips1_commit, |