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| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2021-08-03 12:03:10 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-08-09 15:44:02 -0400 |
| commit | 314c7629e2024be2a67b1c134746473417c20dac (patch) | |
| tree | 29be64072cdc48b1a8b44cbd9cfb67b06140f79c | |
| parent | 19c618e613afbd728de59e3c487cb56d8c670607 (diff) | |
| download | linux-314c7629e2024be2a67b1c134746473417c20dac.tar.gz linux-314c7629e2024be2a67b1c134746473417c20dac.tar.bz2 linux-314c7629e2024be2a67b1c134746473417c20dac.zip | |
drm/amd/display: Increase timeout threshold for DMCUB reset
[Why]
If we're backdoor loading the DMCUB performs more work than just
the PHY reset so we can end up resetting before the cleanup has fully
finished.
[How]
Increase timeout, add udelay between spins to guarantee a minimum.
Reviewed-by: Roy Chan <roy.chan@amd.com>
Reviewed-by: Eric Yang <Eric.Yang2@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c index 19141bf84a8c..fc667cb17eb0 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn31.c @@ -83,7 +83,7 @@ static inline void dmub_dcn31_translate_addr(const union dmub_addr *addr_in, void dmub_dcn31_reset(struct dmub_srv *dmub) { union dmub_gpint_data_register cmd; - const uint32_t timeout = 30; + const uint32_t timeout = 100; uint32_t in_reset, scratch, i; REG_GET(DMCUB_CNTL2, DMCUB_SOFT_RESET, &in_reset); @@ -98,21 +98,21 @@ void dmub_dcn31_reset(struct dmub_srv *dmub) /** * Timeout covers both the ACK and the wait * for remaining work to finish. - * - * This is mostly bound by the PHY disable sequence. - * Each register check will be greater than 1us, so - * don't bother using udelay. */ for (i = 0; i < timeout; ++i) { if (dmub->hw_funcs.is_gpint_acked(dmub, cmd)) break; + + udelay(1); } for (i = 0; i < timeout; ++i) { scratch = dmub->hw_funcs.get_gpint_response(dmub); if (scratch == DMUB_GPINT__STOP_FW_RESPONSE) break; + + udelay(1); } /* Force reset in case we timed out, DMCUB is likely hung. */ |