[PATCH 2/3] Revert "drm/amd/display: turn DPMS off on connector unplug"

[Wayne Lin <Wayne.Lin@amd.com>]

This reverts commit 3c4d55c9b9becedd8d31a7c96783a364533713ab.

[Why and How]
Revert the commit because:
- It's incomplete of the function dm_set_dpms_off() for mst case.
  For stream sinks whithin the same mst topology, they share the
  same dc_link. dm_set_dpms_off() tries to update one mst stream
  only which is incomplete.
- Setting dpms off should be triggered by usermode. Besdies, it seems
  usermode does release relevant resource for mst & non-mst case
  when unplug connecotr now.

Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 31 -------------------
 drivers/gpu/drm/amd/display/dc/core/dc.c      | 13 --------
 drivers/gpu/drm/amd/display/dc/dc_stream.h    |  1 -
 3 files changed, 45 deletions(-)

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 01a36c550778..d81b9ef11dba 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2575,33 +2575,6 @@ static void dm_gpureset_commit_state(struct dc_state *dc_state,
 	return;
 }
 
-static void dm_set_dpms_off(struct dc_link *link)
-{
-	struct dc_stream_state *stream_state;
-	struct amdgpu_dm_connector *aconnector = link->priv;
-	struct amdgpu_device *adev = drm_to_adev(aconnector->base.dev);
-	struct dc_stream_update stream_update;
-	bool dpms_off = true;
-
-	memset(&stream_update, 0, sizeof(stream_update));
-	stream_update.dpms_off = &dpms_off;
-
-	mutex_lock(&adev->dm.dc_lock);
-	stream_state = dc_stream_find_from_link(link);
-
-	if (stream_state == NULL) {
-		DRM_DEBUG_DRIVER("Error finding stream state associated with link!\n");
-		mutex_unlock(&adev->dm.dc_lock);
-		return;
-	}
-
-	stream_update.stream = stream_state;
-	dc_commit_updates_for_stream(stream_state->ctx->dc, NULL, 0,
-				     stream_state, &stream_update,
-				     stream_state->ctx->dc->current_state);
-	mutex_unlock(&adev->dm.dc_lock);
-}
-
 static int dm_resume(void *handle)
 {
 	struct amdgpu_device *adev = handle;
@@ -3088,10 +3061,6 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector)
 			drm_kms_helper_connector_hotplug_event(connector);
 
 	} else if (dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD)) {
-		if (new_connection_type == dc_connection_none &&
-		    aconnector->dc_link->type == dc_connection_none)
-			dm_set_dpms_off(aconnector->dc_link);
-
 		amdgpu_dm_update_connector_after_detect(aconnector);
 
 		drm_modeset_lock_all(dev);
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index c2fcd67bcc4d..cc2910d251d2 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -3260,19 +3260,6 @@ struct dc_stream_state *dc_get_stream_at_index(struct dc *dc, uint8_t i)
 	return NULL;
 }
 
-struct dc_stream_state *dc_stream_find_from_link(const struct dc_link *link)
-{
-	uint8_t i;
-	struct dc_context *ctx = link->ctx;
-
-	for (i = 0; i < ctx->dc->current_state->stream_count; i++) {
-		if (ctx->dc->current_state->streams[i]->link == link)
-			return ctx->dc->current_state->streams[i];
-	}
-
-	return NULL;
-}
-
 enum dc_irq_source dc_interrupt_to_irq_source(
 		struct dc *dc,
 		uint32_t src_id,
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index 58941f4defb3..fecdbc75b47b 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -323,7 +323,6 @@ void dc_stream_log(const struct dc *dc, const struct dc_stream_state *stream);
 
 uint8_t dc_get_current_stream_count(struct dc *dc);
 struct dc_stream_state *dc_get_stream_at_index(struct dc *dc, uint8_t i);
-struct dc_stream_state *dc_stream_find_from_link(const struct dc_link *link);
 
 /*
  * Return the current frame counter.
-- 
2.36.1