drm/amd/display: Add periodic detection for IPS

[Why]
HPD interrupt cannot be handled in IPS2 state.
So if there's a display topology change while system in IPS2
it can be missed.

[How]
Implement worker to check each 5 sec in IPS for HPD.

Reviewed-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c
index bfa090432ce2..633ab1c16dc6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_psr.c
@@ -223,3 +223,31 @@ bool amdgpu_dm_psr_disable_all(struct amdgpu_display_manager *dm)
 	return dc_set_psr_allow_active(dm->dc, false);
 }
 
+/*
+ * amdgpu_dm_psr_is_active_allowed() - check if psr is allowed on any stream
+ * @dm:  pointer to amdgpu_display_manager
+ *
+ * Return: true if allowed
+ */
+
+bool amdgpu_dm_psr_is_active_allowed(struct amdgpu_display_manager *dm)
+{
+	unsigned int i;
+	bool allow_active = false;
+
+	for (i = 0; i < dm->dc->current_state->stream_count ; i++) {
+		struct dc_link *link;
+		struct dc_stream_state *stream = dm->dc->current_state->streams[i];
+
+		link = stream->link;
+		if (!link)
+			continue;
+		if (link->psr_settings.psr_feature_enabled &&
+		    link->psr_settings.psr_allow_active) {
+			allow_active = true;
+			break;
+		}
+	}
+
+	return allow_active;
+}