[PATCH 11/14] drm/i915/dp_mst: Refactor pipe_bpp limits with dsc for mst

[Ankit Nautiyal]

Similar to DP, set the dsc limits->pipe.max/min_bpp early for MST too.
Use the limits while computing the compressed bpp.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c     |  2 +-
 drivers/gpu/drm/i915/display/intel_dp.h     |  3 +++
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 11 +++++------
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index fe0957e028bc..c5740b8d2315 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2504,7 +2504,7 @@ intel_dp_compute_config_link_bpp_limits(struct intel_dp *intel_dp,
 	return true;
 }
 
-static void
+void
 intel_dp_dsc_compute_pipe_bpp_limits(struct intel_dp *intel_dp,
 				     struct link_config_limits *limits)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 4895b52d41e8..45b37d322565 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -200,6 +200,9 @@ intel_dp_compute_config_link_bpp_limits(struct intel_dp *intel_dp,
 					const struct intel_crtc_state *crtc_state,
 					bool dsc,
 					struct link_config_limits *limits);
+void
+intel_dp_dsc_compute_pipe_bpp_limits(struct intel_dp *intel_dp,
+				     struct link_config_limits *limits);
 
 void intel_dp_get_dsc_sink_cap(u8 dpcd_rev, struct intel_connector *connector);
 bool intel_dp_has_gamut_metadata_dip(struct intel_encoder *encoder);
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 795594191717..667006918bfd 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -365,14 +365,10 @@ static int mst_stream_dsc_compute_link_config(struct intel_dp *intel_dp,
 	int i, num_bpc;
 	u8 dsc_bpc[3] = {};
 	int min_bpp, max_bpp, sink_min_bpp, sink_max_bpp;
-	int dsc_max_bpc, dsc_min_bpc;
 	int min_compressed_bpp, max_compressed_bpp;
 
-	dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
-	dsc_min_bpc = intel_dp_dsc_min_src_input_bpc();
-
-	max_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
-	min_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
+	max_bpp = limits->pipe.max_bpp;
+	min_bpp = limits->pipe.min_bpp;
 
 	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(connector->dp.dsc_dpcd,
 						       dsc_bpc);
@@ -574,6 +570,9 @@ mst_stream_compute_config_limits(struct intel_dp *intel_dp,
 
 	intel_dp_test_compute_config(intel_dp, crtc_state, limits);
 
+	if (dsc)
+		intel_dp_dsc_compute_pipe_bpp_limits(intel_dp, limits);
+
 	if (!intel_dp_compute_config_link_bpp_limits(intel_dp,
 						     crtc_state,
 						     dsc,
-- 
2.45.2