[PATCH 06/12] drm/i915/dp_mst: Use helpers to get dsc min/max input bpc

[Ankit Nautiyal <ankit.k.nautiyal@intel.com>]

Use helpers for source min/max input bpc with DSC.
While at it, make them return int instead of u8 and use struct
intel_display.

v2: Make the helpers return int instead of u8. (Jani)
v3: Use min/max macros instead of min_t/max_t. (Jani)
v4: Use struct intel_display.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c     | 25 ++++++++++-----------
 drivers/gpu/drm/i915/display/intel_dp.h     |  3 +++
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 13 +++++------
 3 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 10fb2b9e6bc1..e6dacdf00e0b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1788,13 +1788,12 @@ intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
 	return -EINVAL;
 }
 
-static
-int intel_dp_dsc_max_src_input_bpc(struct drm_i915_private *i915)
+int intel_dp_dsc_max_src_input_bpc(struct intel_display *display)
 {
 	/* Max DSC Input BPC for ICL is 10 and for TGL+ is 12 */
-	if (DISPLAY_VER(i915) >= 12)
+	if (DISPLAY_VER(display) >= 12)
 		return 12;
-	if (DISPLAY_VER(i915) == 11)
+	if (DISPLAY_VER(display) == 11)
 		return 10;
 
 	return 0;
@@ -1803,12 +1802,12 @@ int intel_dp_dsc_max_src_input_bpc(struct drm_i915_private *i915)
 int intel_dp_dsc_compute_max_bpp(const struct intel_connector *connector,
 				 u8 max_req_bpc)
 {
-	struct drm_i915_private *i915 = to_i915(connector->base.dev);
+	struct intel_display *display = to_intel_display(connector);
 	int i, num_bpc;
 	u8 dsc_bpc[3] = {};
 	int dsc_max_bpc;
 
-	dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(i915);
+	dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
 
 	if (!dsc_max_bpc)
 		return dsc_max_bpc;
@@ -2191,8 +2190,7 @@ static int dsc_compute_compressed_bpp(struct intel_dp *intel_dp,
 					   dsc_max_bpp, dsc_min_bpp, pipe_bpp, timeslots);
 }
 
-static
-int intel_dp_dsc_min_src_input_bpc(struct drm_i915_private *i915)
+int intel_dp_dsc_min_src_input_bpc(struct intel_display *display)
 {
 	/* Min DSC Input BPC for ICL+ is 8 */
 	return 8;
@@ -2204,10 +2202,11 @@ bool is_dsc_pipe_bpp_sufficient(struct drm_i915_private *i915,
 				struct link_config_limits *limits,
 				int pipe_bpp)
 {
+	struct intel_display *display = to_intel_display(&i915->drm);
 	int dsc_max_bpc, dsc_min_bpc, dsc_max_pipe_bpp, dsc_min_pipe_bpp;
 
-	dsc_max_bpc = min(intel_dp_dsc_max_src_input_bpc(i915), conn_state->max_requested_bpc);
-	dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(i915);
+	dsc_max_bpc = min(intel_dp_dsc_max_src_input_bpc(display), conn_state->max_requested_bpc);
+	dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
 
 	dsc_max_pipe_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
 	dsc_min_pipe_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
@@ -2246,7 +2245,7 @@ static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
 					 struct link_config_limits *limits,
 					 int timeslots)
 {
-	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+	struct intel_display *display = to_intel_display(intel_dp);
 	const struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
 	int max_req_bpc = conn_state->max_requested_bpc;
@@ -2267,14 +2266,14 @@ static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp *intel_dp,
 		}
 	}
 
-	dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(i915);
+	dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
 	if (!dsc_max_bpc)
 		return -EINVAL;
 
 	dsc_max_bpc = min(dsc_max_bpc, max_req_bpc);
 	dsc_max_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
 
-	dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(i915);
+	dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
 	dsc_min_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
 
 	/*
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 4ae54e9718ce..e5a25e5cbc25 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -20,6 +20,7 @@ struct intel_atomic_state;
 struct intel_connector;
 struct intel_crtc_state;
 struct intel_digital_port;
+struct intel_display;
 struct intel_dp;
 struct intel_encoder;
 
@@ -207,5 +208,7 @@ bool intel_dp_link_params_valid(struct intel_dp *intel_dp, int link_rate,
 				u8 lane_count);
 bool intel_dp_has_connector(struct intel_dp *intel_dp,
 			    const struct drm_connector_state *conn_state);
+int intel_dp_dsc_max_src_input_bpc(struct intel_display *display);
+int intel_dp_dsc_min_src_input_bpc(struct intel_display *display);
 
 #endif /* __INTEL_DP_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 0662736849ac..9568924d143b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -366,17 +366,14 @@ static int mst_stream_dsc_compute_link_config(struct intel_encoder *encoder,
 	int i, num_bpc;
 	u8 dsc_bpc[3] = {};
 	int min_bpp, max_bpp, sink_min_bpp, sink_max_bpp;
-	u8 dsc_max_bpc;
+	int dsc_max_bpc, dsc_min_bpc;
 	int min_compressed_bpp, max_compressed_bpp;
 
-	/* Max DSC Input BPC for ICL is 10 and for TGL+ is 12 */
-	if (DISPLAY_VER(display) >= 12)
-		dsc_max_bpc = min_t(u8, 12, conn_state->max_requested_bpc);
-	else
-		dsc_max_bpc = min_t(u8, 10, conn_state->max_requested_bpc);
+	dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
+	dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
 
-	max_bpp = min_t(u8, dsc_max_bpc * 3, limits->pipe.max_bpp);
-	min_bpp = limits->pipe.min_bpp;
+	max_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
+	min_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
 
 	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(connector->dp.dsc_dpcd,
 						       dsc_bpc);
-- 
2.45.2