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author | Alvin Lee <Alvin.Lee2@amd.com> | 2021-11-04 16:52:15 -0400 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2021-11-17 16:58:11 -0500 |
commit | d493a0244fce12de22a220468e6628bb008a0e58 (patch) | |
tree | 3948f3d9617d28e699222740935bf8902a155106 /drivers/gpu/drm/amd | |
parent | 7a47c8820a1d97e6cb5bcef6b65529f1389b0e13 (diff) | |
download | linux-stable-d493a0244fce12de22a220468e6628bb008a0e58.tar.gz linux-stable-d493a0244fce12de22a220468e6628bb008a0e58.tar.bz2 linux-stable-d493a0244fce12de22a220468e6628bb008a0e58.zip |
drm/amd/display: Wait for ACK for INBOX0 HW Lock
[Why]
In DC we want to wait for the INBOX0 HW Lock command to ACK before
continuing. This is to ensure that the lock has been successfully
acquired before programming HW in DC.
[How]
Add interfaces to send messages on INBOX0, poll for their completation
and clear the ack.
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c | 37 | ||||
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h | 2 | ||||
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c | 3 | ||||
-rw-r--r-- | drivers/gpu/drm/amd/display/dmub/dmub_srv.h | 41 | ||||
-rw-r--r-- | drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 35 |
5 files changed, 115 insertions, 3 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 360f3199ea6f..541376fabbef 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c @@ -115,13 +115,44 @@ void dc_dmub_srv_wait_idle(struct dc_dmub_srv *dc_dmub_srv) } } +void dc_dmub_srv_clear_inbox0_ack(struct dc_dmub_srv *dmub_srv) +{ + struct dmub_srv *dmub = dmub_srv->dmub; + struct dc_context *dc_ctx = dmub_srv->ctx; + enum dmub_status status = DMUB_STATUS_OK; + + status = dmub_srv_clear_inbox0_ack(dmub); + if (status != DMUB_STATUS_OK) { + DC_ERROR("Error clearing INBOX0 ack: status=%d\n", status); + dc_dmub_srv_log_diagnostic_data(dmub_srv); + } +} + +void dc_dmub_srv_wait_for_inbox0_ack(struct dc_dmub_srv *dmub_srv) +{ + struct dmub_srv *dmub = dmub_srv->dmub; + struct dc_context *dc_ctx = dmub_srv->ctx; + enum dmub_status status = DMUB_STATUS_OK; + + status = dmub_srv_wait_for_inbox0_ack(dmub, 100000); + if (status != DMUB_STATUS_OK) { + DC_ERROR("Error waiting for INBOX0 HW Lock Ack\n"); + dc_dmub_srv_log_diagnostic_data(dmub_srv); + } +} + void dc_dmub_srv_send_inbox0_cmd(struct dc_dmub_srv *dmub_srv, union dmub_inbox0_data_register data) { struct dmub_srv *dmub = dmub_srv->dmub; - if (dmub->hw_funcs.send_inbox0_cmd) - dmub->hw_funcs.send_inbox0_cmd(dmub, data); - // TODO: Add wait command -- poll register for ACK + struct dc_context *dc_ctx = dmub_srv->ctx; + enum dmub_status status = DMUB_STATUS_OK; + + status = dmub_srv_send_inbox0_cmd(dmub, data); + if (status != DMUB_STATUS_OK) { + DC_ERROR("Error sending INBOX0 cmd\n"); + dc_dmub_srv_log_diagnostic_data(dmub_srv); + } } bool dc_dmub_srv_cmd_with_reply_data(struct dc_dmub_srv *dc_dmub_srv, union dmub_rb_cmd *cmd) diff --git a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h index 3e35eee7188c..7e4e2ec5915d 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h +++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h @@ -68,6 +68,8 @@ bool dc_dmub_srv_get_dmub_outbox0_msg(const struct dc *dc, struct dmcub_trace_bu void dc_dmub_trace_event_control(struct dc *dc, bool enable); +void dc_dmub_srv_clear_inbox0_ack(struct dc_dmub_srv *dmub_srv); +void dc_dmub_srv_wait_for_inbox0_ack(struct dc_dmub_srv *dmub_srv); void dc_dmub_srv_send_inbox0_cmd(struct dc_dmub_srv *dmub_srv, union dmub_inbox0_data_register data); bool dc_dmub_srv_get_diagnostic_data(struct dc_dmub_srv *dc_dmub_srv, struct dmub_diagnostic_data *dmub_oca); diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c index 9baf8ca0a920..b1b2e3c6f379 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c @@ -56,8 +56,11 @@ void dmub_hw_lock_mgr_inbox0_cmd(struct dc_dmub_srv *dmub_srv, union dmub_inbox0_cmd_lock_hw hw_lock_cmd) { union dmub_inbox0_data_register data = { 0 }; + data.inbox0_cmd_lock_hw = hw_lock_cmd; + dc_dmub_srv_clear_inbox0_ack(dmub_srv); dc_dmub_srv_send_inbox0_cmd(dmub_srv, data); + dc_dmub_srv_wait_for_inbox0_ack(dmub_srv); } bool should_use_dmub_lock(struct dc_link *link) diff --git a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h index cd204eef073b..90065a09e76a 100644 --- a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h +++ b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h @@ -360,6 +360,8 @@ struct dmub_srv_hw_funcs { uint32_t (*get_gpint_dataout)(struct dmub_srv *dmub); + void (*clear_inbox0_ack_register)(struct dmub_srv *dmub); + uint32_t (*read_inbox0_ack_register)(struct dmub_srv *dmub); void (*send_inbox0_cmd)(struct dmub_srv *dmub, union dmub_inbox0_data_register data); uint32_t (*get_current_time)(struct dmub_srv *dmub); @@ -735,6 +737,45 @@ bool dmub_srv_get_diagnostic_data(struct dmub_srv *dmub, struct dmub_diagnostic_ bool dmub_srv_should_detect(struct dmub_srv *dmub); +/** + * dmub_srv_send_inbox0_cmd() - Send command to DMUB using INBOX0 + * @dmub: the dmub service + * @data: the data to be sent in the INBOX0 command + * + * Send command by writing directly to INBOX0 WPTR + * + * Return: + * DMUB_STATUS_OK - success + * DMUB_STATUS_INVALID - hw_init false or hw function does not exist + */ +enum dmub_status dmub_srv_send_inbox0_cmd(struct dmub_srv *dmub, union dmub_inbox0_data_register data); + +/** + * dmub_srv_wait_for_inbox0_ack() - wait for DMUB to ACK INBOX0 command + * @dmub: the dmub service + * @timeout_us: the maximum number of microseconds to wait + * + * Wait for DMUB to ACK the INBOX0 message + * + * Return: + * DMUB_STATUS_OK - success + * DMUB_STATUS_INVALID - hw_init false or hw function does not exist + * DMUB_STATUS_TIMEOUT - wait for ack timed out + */ +enum dmub_status dmub_srv_wait_for_inbox0_ack(struct dmub_srv *dmub, uint32_t timeout_us); + +/** + * dmub_srv_wait_for_inbox0_ack() - clear ACK register for INBOX0 + * @dmub: the dmub service + * + * Clear ACK register for INBOX0 + * + * Return: + * DMUB_STATUS_OK - success + * DMUB_STATUS_INVALID - hw_init false or hw function does not exist + */ +enum dmub_status dmub_srv_clear_inbox0_ack(struct dmub_srv *dmub); + #if defined(__cplusplus) } #endif diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c index 4a2cb0cdb0ba..56a03328e8e6 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -842,3 +842,38 @@ bool dmub_srv_should_detect(struct dmub_srv *dmub) return dmub->hw_funcs.should_detect(dmub); } + +enum dmub_status dmub_srv_clear_inbox0_ack(struct dmub_srv *dmub) +{ + if (!dmub->hw_init || dmub->hw_funcs.clear_inbox0_ack_register) + return DMUB_STATUS_INVALID; + + dmub->hw_funcs.clear_inbox0_ack_register(dmub); + return DMUB_STATUS_OK; +} + +enum dmub_status dmub_srv_wait_for_inbox0_ack(struct dmub_srv *dmub, uint32_t timeout_us) +{ + uint32_t i = 0; + uint32_t ack = 0; + + if (!dmub->hw_init || !dmub->hw_funcs.read_inbox0_ack_register) + return DMUB_STATUS_INVALID; + + for (i = 0; i <= timeout_us; i++) { + ack = dmub->hw_funcs.read_inbox0_ack_register(dmub); + if (ack) + return DMUB_STATUS_OK; + } + return DMUB_STATUS_TIMEOUT; +} + +enum dmub_status dmub_srv_send_inbox0_cmd(struct dmub_srv *dmub, + union dmub_inbox0_data_register data) +{ + if (!dmub->hw_init || dmub->hw_funcs.send_inbox0_cmd) + return DMUB_STATUS_INVALID; + + dmub->hw_funcs.send_inbox0_cmd(dmub, data); + return DMUB_STATUS_OK; +} |