[PATCH 21/33] drm/amd/display: decouple global lock out of pipe control lock

[Bhawanpreet Lakha]

From: Wenjing Liu <Wenjing.Liu at amd.com>

[why]
hwss should not guess what type of pipe lock is needed.
The caller of the lock function should know
the right type of pipe lock.
Decouple the setup of global lock outside of pipe control lock
logic.

Signed-off-by: Wenjing Liu <Wenjing.Liu at amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c      | 20 ++++++++++++++
 .../drm/amd/display/dc/dcn20/dcn20_hwseq.c    | 27 -------------------
 2 files changed, 20 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 7fdd82b7708a..40878b86a05d 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -2220,6 +2220,11 @@ static void commit_planes_for_stream(struct dc *dc,
 		}
 	}
 
+	if ((update_type != UPDATE_TYPE_FAST) && stream->update_flags.bits.dsc_changed)
+		if (top_pipe_to_program->stream_res.tg->funcs->lock_doublebuffer_enable)
+			top_pipe_to_program->stream_res.tg->funcs->lock_doublebuffer_enable(
+					top_pipe_to_program->stream_res.tg);
+
 	if ((update_type != UPDATE_TYPE_FAST) && dc->hwss.interdependent_update_lock)
 		dc->hwss.interdependent_update_lock(dc, context, true);
 	else
@@ -2377,6 +2382,21 @@ static void commit_planes_for_stream(struct dc *dc,
 	else
 		dc->hwss.pipe_control_lock(dc, top_pipe_to_program, false);
 
+	if ((update_type != UPDATE_TYPE_FAST) && stream->update_flags.bits.dsc_changed)
+		if (top_pipe_to_program->stream_res.tg->funcs->lock_doublebuffer_enable) {
+			top_pipe_to_program->stream_res.tg->funcs->wait_for_state(
+					top_pipe_to_program->stream_res.tg,
+					CRTC_STATE_VACTIVE);
+			top_pipe_to_program->stream_res.tg->funcs->wait_for_state(
+					top_pipe_to_program->stream_res.tg,
+					CRTC_STATE_VBLANK);
+			top_pipe_to_program->stream_res.tg->funcs->wait_for_state(
+					top_pipe_to_program->stream_res.tg,
+					CRTC_STATE_VACTIVE);
+			top_pipe_to_program->stream_res.tg->funcs->lock_doublebuffer_disable(
+					top_pipe_to_program->stream_res.tg);
+		}
+
 	if (update_type != UPDATE_TYPE_FAST)
 		dc->hwss.post_unlock_program_front_end(dc, context);
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index 9713f452debf..52ef4d333112 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1094,7 +1094,6 @@ void dcn20_pipe_control_lock(
 	bool lock)
 {
 	bool flip_immediate = false;
-	bool dig_update_required = false;
 
 	/* use TG master update lock to lock everything on the TG
 	 * therefore only top pipe need to lock
@@ -1132,19 +1131,6 @@ void dcn20_pipe_control_lock(
 		    (!flip_immediate && pipe->stream_res.gsl_group > 0))
 			dcn20_setup_gsl_group_as_lock(dc, pipe, flip_immediate);
 
-	if (pipe->stream && pipe->stream->update_flags.bits.dsc_changed)
-		dig_update_required = true;
-
-	/* Need double buffer lock mode in order to synchronize front end pipe
-	 * updates with dig updates.
-	 */
-	if (dig_update_required) {
-		if (lock) {
-			pipe->stream_res.tg->funcs->lock_doublebuffer_enable(
-					pipe->stream_res.tg);
-		}
-	}
-
 	if (pipe->plane_state != NULL && pipe->plane_state->triplebuffer_flips) {
 		if (lock)
 			pipe->stream_res.tg->funcs->triplebuffer_lock(pipe->stream_res.tg);
@@ -1156,19 +1142,6 @@ void dcn20_pipe_control_lock(
 		else
 			pipe->stream_res.tg->funcs->unlock(pipe->stream_res.tg);
 	}
-
-	if (dig_update_required) {
-		if (!lock) {
-			pipe->stream_res.tg->funcs->wait_for_state(pipe->stream_res.tg,
-					CRTC_STATE_VACTIVE);
-			pipe->stream_res.tg->funcs->wait_for_state(pipe->stream_res.tg,
-					CRTC_STATE_VBLANK);
-			pipe->stream_res.tg->funcs->wait_for_state(pipe->stream_res.tg,
-					CRTC_STATE_VACTIVE);
-			pipe->stream_res.tg->funcs->lock_doublebuffer_disable(
-					pipe->stream_res.tg);
-		}
-	}
 }
 
 static void dcn20_detect_pipe_changes(struct pipe_ctx *old_pipe, struct pipe_ctx *new_pipe)
-- 
2.17.1