[PATCH 27/34] drm/amd/display: Lock all enabled otg pipes even with no planes

[Alex Hung]

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

[WHY]
On DCN32 we support dynamic ODM even when OTG is blanked. When ODM
configuration is dynamically changed and the OTG is on blank pattern,
we will need to reprogram OPP's test pattern based on new ODM
configuration. Therefore we need to lock the OTG pipe to avoid temporary
corruption when we are reprogramming OPP blank patterns.

[HOW]
Add a new interdependent update lock implementation to lock all enabled
OTG pipes even when there is no plane on the OTG for DCN32.

Cc: Mario Limonciello <mario.limonciello at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: stable at vger.kernel.org
Reviewed-by: Alvin Lee <alvin.lee2 at amd.com>
Acked-by: Alex Hung <alex.hung at amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu at amd.com>
---
 .../amd/display/dc/hwss/dcn32/dcn32_hwseq.c   | 23 +++++++++++++++++++
 .../amd/display/dc/hwss/dcn32/dcn32_hwseq.h   |  2 ++
 .../amd/display/dc/hwss/dcn32/dcn32_init.c    |  2 +-
 3 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
index b890db0bfc46..c0b526cf1786 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c
@@ -1785,3 +1785,26 @@ void dcn32_prepare_bandwidth(struct dc *dc,
 		context->bw_ctx.bw.dcn.clk.p_state_change_support = p_state_change_support;
 	}
 }
+
+void dcn32_interdependent_update_lock(struct dc *dc,
+		struct dc_state *context, bool lock)
+{
+	unsigned int i;
+	struct pipe_ctx *pipe;
+	struct timing_generator *tg;
+
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		pipe = &context->res_ctx.pipe_ctx[i];
+		tg = pipe->stream_res.tg;
+
+		if (!resource_is_pipe_type(pipe, OTG_MASTER) ||
+				!tg->funcs->is_tg_enabled(tg) ||
+				dc_state_get_pipe_subvp_type(context, pipe) == SUBVP_PHANTOM)
+			continue;
+
+		if (lock)
+			dc->hwss.pipe_control_lock(dc, pipe, true);
+		else
+			dc->hwss.pipe_control_lock(dc, pipe, false);
+	}
+}
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.h b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.h
index 069e20bc87c0..f55c11fc56ec 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.h
@@ -129,4 +129,6 @@ bool dcn32_is_pipe_topology_transition_seamless(struct dc *dc,
 void dcn32_prepare_bandwidth(struct dc *dc,
 	struct dc_state *context);
 
+void dcn32_interdependent_update_lock(struct dc *dc,
+		struct dc_state *context, bool lock);
 #endif /* __DC_HWSS_DCN32_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_init.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_init.c
index 2b073123d3ed..67d661dbd5b7 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_init.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_init.c
@@ -58,7 +58,7 @@ static const struct hw_sequencer_funcs dcn32_funcs = {
 	.disable_plane = dcn20_disable_plane,
 	.disable_pixel_data = dcn20_disable_pixel_data,
 	.pipe_control_lock = dcn20_pipe_control_lock,
-	.interdependent_update_lock = dcn10_lock_all_pipes,
+	.interdependent_update_lock = dcn32_interdependent_update_lock,
 	.cursor_lock = dcn10_cursor_lock,
 	.prepare_bandwidth = dcn32_prepare_bandwidth,
 	.optimize_bandwidth = dcn20_optimize_bandwidth,
-- 
2.34.1