[PATCH 10/14] drm/i915/display/vdsc: Add ultrajoiner support with DSC

[Ankit Nautiyal]

From: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>

Add changes to DSC which are required for Ultrajoiner.

v2:
-Use correct helper for setting bits for bigjoiner secondary. (Ankit)
-Use enum for joiner pipe count instead magic numbers. (Suraj)
-Use primary/secondary instead of master/slave. (Suraj)

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c | 26 +++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 8158e3702ed5..66e810c8de68 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -379,9 +379,11 @@ static int intel_dsc_get_vdsc_per_pipe(const struct intel_crtc_state *crtc_state
 int intel_dsc_get_num_vdsc_instances(const struct intel_crtc_state *crtc_state)
 {
 	int num_vdsc_instances = intel_dsc_get_vdsc_per_pipe(crtc_state);
+	int joined_pipes = intel_joiner_num_pipes(crtc_state);
 
-	if (crtc_state->joiner_pipes)
-		num_vdsc_instances *= 2;
+	if (joined_pipes == INTEL_BIG_JOINER_PIPES ||
+	    joined_pipes == INTEL_ULTRA_JOINER_PIPES)
+		num_vdsc_instances *= joined_pipes;
 
 	return num_vdsc_instances;
 }
@@ -751,6 +753,14 @@ void intel_uncompressed_joiner_enable(const struct intel_crtc_state *crtc_state)
 	}
 }
 
+static bool intel_crtc_ultrajoiner_enable_needed(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+	return intel_joiner_num_pipes(crtc_state) == INTEL_ULTRA_JOINER_PIPES &&
+	       crtc->pipe != PIPE_D;
+}
+
 void intel_dsc_enable(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@@ -770,7 +780,19 @@ void intel_dsc_enable(const struct intel_crtc_state *crtc_state)
 		dss_ctl1_val |= JOINER_ENABLE;
 	}
 	if (crtc_state->joiner_pipes) {
+		/*
+		 * This bit doesn't seem to follow primary/secondary logic or
+		 * any other logic, so lets just add helper function to
+		 * at least hide this hassle..
+		 */
+		if (intel_crtc_ultrajoiner_enable_needed(crtc_state))
+			dss_ctl1_val |= ULTRA_JOINER_ENABLE;
+
+		if (intel_crtc_is_ultrajoiner_primary(crtc_state))
+			dss_ctl1_val |= PRIMARY_ULTRA_JOINER_ENABLE;
+
 		dss_ctl1_val |= BIG_JOINER_ENABLE;
+
 		if (intel_crtc_is_bigjoiner_primary(crtc_state))
 			dss_ctl1_val |= PRIMARY_BIG_JOINER_ENABLE;
 	}
-- 
2.45.2