This is a note to let you know that I've just added the patch titled
drm/amd/display: do not send commands to DMUB if DMUB is inactive from S3
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-do-not-send-commands-to-dmub-if-dmub.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8134e950367e2fdc64ba284b01989421d5c41d1a
Author: Samson Tam <samson.tam@xxxxxxx>
Date: Tue Nov 28 16:53:12 2023 -0500
drm/amd/display: do not send commands to DMUB if DMUB is inactive from S3
[ Upstream commit 0f657938e4345a77be871d906f3e0de3c58a7a49 ]
[Why]
On resume from S3, may get apply_idle_optimizations call while DMUB
is inactive which will just time out.
[How]
Set and track power state in dmub_srv and check power state before
sending commands to DMUB. Add interface in both dmub_srv and
dc_dmub_srv
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Acked-by: Wayne Lin <wayne.lin@xxxxxxx>
Signed-off-by: Samson Tam <samson.tam@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Stable-dep-of: 8892780834ae ("drm/amd/display: Wake DMCUB before sending a command")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index a9bd020b165a..4d534ac18356 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2656,6 +2656,7 @@ static int dm_suspend(void *handle)
hpd_rx_irq_work_suspend(dm);
dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D3);
+ dc_dmub_srv_set_power_state(dm->dc->ctx->dmub_srv, DC_ACPI_CM_POWER_STATE_D3);
return 0;
}
@@ -2851,6 +2852,7 @@ static int dm_resume(void *handle)
if (r)
DRM_ERROR("DMUB interface failed to initialize: status=%d\n", r);
+ dc_dmub_srv_set_power_state(dm->dc->ctx->dmub_srv, DC_ACPI_CM_POWER_STATE_D0);
dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D0);
dc_resume(dm->dc);
@@ -2901,6 +2903,7 @@ static int dm_resume(void *handle)
}
/* power on hardware */
+ dc_dmub_srv_set_power_state(dm->dc->ctx->dmub_srv, DC_ACPI_CM_POWER_STATE_D0);
dc_set_power_state(dm->dc, DC_ACPI_CM_POWER_STATE_D0);
/* program HPD filter */
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 0e07699c1e83..0c963dfd6061 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c
@@ -1251,3 +1251,17 @@ void dc_dmub_srv_exit_low_power_state(const struct dc *dc)
ASSERT(0);
}
+void dc_dmub_srv_set_power_state(struct dc_dmub_srv *dc_dmub_srv, enum dc_acpi_cm_power_state powerState)
+{
+ struct dmub_srv *dmub;
+
+ if (!dc_dmub_srv)
+ return;
+
+ dmub = dc_dmub_srv->dmub;
+
+ if (powerState == DC_ACPI_CM_POWER_STATE_D0)
+ dmub_srv_set_power_state(dmub, DMUB_POWER_STATE_D0);
+ else
+ dmub_srv_set_power_state(dmub, DMUB_POWER_STATE_D3);
+}
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 d4a60f53faab..c25ce7546f71 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_dmub_srv.h
@@ -102,4 +102,6 @@ void dc_dmub_srv_subvp_save_surf_addr(const struct dc_dmub_srv *dc_dmub_srv, con
bool dc_dmub_srv_is_hw_pwr_up(struct dc_dmub_srv *dc_dmub_srv, bool wait);
void dc_dmub_srv_notify_idle(const struct dc *dc, bool allow_idle);
void dc_dmub_srv_exit_low_power_state(const struct dc *dc);
+
+void dc_dmub_srv_set_power_state(struct dc_dmub_srv *dc_dmub_srv, enum dc_acpi_cm_power_state powerState);
#endif /* _DMUB_DC_SRV_H_ */
diff --git a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
index df63aa8f01e9..d1a4ed6f5916 100644
--- a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
+++ b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
@@ -150,6 +150,13 @@ enum dmub_memory_access_type {
DMUB_MEMORY_ACCESS_DMA
};
+/* enum dmub_power_state type - to track DC power state in dmub_srv */
+enum dmub_srv_power_state_type {
+ DMUB_POWER_STATE_UNDEFINED = 0,
+ DMUB_POWER_STATE_D0 = 1,
+ DMUB_POWER_STATE_D3 = 8
+};
+
/**
* struct dmub_region - dmub hw memory region
* @base: base address for region, must be 256 byte aligned
@@ -485,6 +492,8 @@ struct dmub_srv {
/* Feature capabilities reported by fw */
struct dmub_feature_caps feature_caps;
struct dmub_visual_confirm_color visual_confirm_color;
+
+ enum dmub_srv_power_state_type power_state;
};
/**
@@ -889,6 +898,18 @@ enum dmub_status dmub_srv_clear_inbox0_ack(struct dmub_srv *dmub);
*/
void dmub_srv_subvp_save_surf_addr(struct dmub_srv *dmub, const struct dc_plane_address *addr, uint8_t subvp_index);
+/**
+ * dmub_srv_set_power_state() - Track DC power state in dmub_srv
+ * @dmub: The dmub service
+ * @power_state: DC power state setting
+ *
+ * Store DC power state in dmub_srv. If dmub_srv is in D3, then don't send messages to DMUB
+ *
+ * Return:
+ * void
+ */
+void dmub_srv_set_power_state(struct dmub_srv *dmub, enum dmub_srv_power_state_type dmub_srv_power_state);
+
#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 38360adc53d9..59d4e64845ca 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
@@ -713,6 +713,7 @@ enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub,
dmub->hw_funcs.reset_release(dmub);
dmub->hw_init = true;
+ dmub->power_state = DMUB_POWER_STATE_D0;
return DMUB_STATUS_OK;
}
@@ -766,6 +767,9 @@ enum dmub_status dmub_srv_cmd_queue(struct dmub_srv *dmub,
if (!dmub->hw_init)
return DMUB_STATUS_INVALID;
+ if (dmub->power_state != DMUB_POWER_STATE_D0)
+ return DMUB_STATUS_INVALID;
+
if (dmub->inbox1_rb.rptr > dmub->inbox1_rb.capacity ||
dmub->inbox1_rb.wrpt > dmub->inbox1_rb.capacity) {
return DMUB_STATUS_HW_FAILURE;
@@ -784,6 +788,9 @@ enum dmub_status dmub_srv_cmd_execute(struct dmub_srv *dmub)
if (!dmub->hw_init)
return DMUB_STATUS_INVALID;
+ if (dmub->power_state != DMUB_POWER_STATE_D0)
+ return DMUB_STATUS_INVALID;
+
/**
* Read back all the queued commands to ensure that they've
* been flushed to framebuffer memory. Otherwise DMCUB might
@@ -1100,3 +1107,11 @@ void dmub_srv_subvp_save_surf_addr(struct dmub_srv *dmub, const struct dc_plane_
subvp_index);
}
}
+
+void dmub_srv_set_power_state(struct dmub_srv *dmub, enum dmub_srv_power_state_type dmub_srv_power_state)
+{
+ if (!dmub || !dmub->hw_init)
+ return;
+
+ dmub->power_state = dmub_srv_power_state;
+}
