[PATCH 15/19] 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)

v3:
-Add the ultrajoiner helpers and use it for setting ultrajoiner bits
(Ankit)

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_display.c | 21 ++++++++++++++++
 drivers/gpu/drm/i915/display/intel_display.h |  2 ++
 drivers/gpu/drm/i915/display/intel_vdsc.c    | 26 ++++++++++++++++++--
 3 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 24698d8ed5d6..db27850b2c36 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -295,6 +295,27 @@ bool intel_crtc_is_bigjoiner_secondary(const struct intel_crtc_state *crtc_state
 	return BIT(crtc->pipe) & bigjoiner_secondary_pipes(crtc_state);
 }
 
+bool intel_crtc_is_ultrajoiner(const struct intel_crtc_state *crtc_state)
+{
+	return intel_joiner_num_pipes(crtc_state) >= 4;
+}
+
+static u8 ultrajoiner_primary_pipes(const struct intel_crtc_state *crtc_state)
+{
+	if (!intel_crtc_is_ultrajoiner(crtc_state))
+		return 0;
+
+	return crtc_state->joiner_pipes & (0b00010001 << joiner_primary_pipe(crtc_state));
+}
+
+bool intel_crtc_is_ultrajoiner_primary(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+	return intel_crtc_is_ultrajoiner(crtc_state) &&
+	       BIT(crtc->pipe) & ultrajoiner_primary_pipes(crtc_state);
+}
+
 u8 intel_crtc_joiner_secondary_pipes(const struct intel_crtc_state *crtc_state)
 {
 	if (crtc_state->joiner_pipes)
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 17d8b9df3916..dbbe23ea14fc 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -427,6 +427,8 @@ bool intel_crtc_is_joiner_secondary(const struct intel_crtc_state *crtc_state);
 bool intel_crtc_is_joiner_primary(const struct intel_crtc_state *crtc_state);
 bool intel_crtc_is_bigjoiner_primary(const struct intel_crtc_state *crtc_state);
 bool intel_crtc_is_bigjoiner_secondary(const struct intel_crtc_state *crtc_state);
+bool intel_crtc_is_ultrajoiner(const struct intel_crtc_state *crtc_state);
+bool intel_crtc_is_ultrajoiner_primary(const struct intel_crtc_state *crtc_state);
 u8 intel_crtc_joiner_secondary_pipes(const struct intel_crtc_state *crtc_state);
 struct intel_crtc *intel_primary_crtc(const struct intel_crtc_state *crtc_state);
 bool intel_crtc_get_pipe_config(struct intel_crtc_state *crtc_state);
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 8158e3702ed5..b95dd7a7111e 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 num_joined_pipes = intel_joiner_num_pipes(crtc_state);
 
-	if (crtc_state->joiner_pipes)
-		num_vdsc_instances *= 2;
+	if (num_joined_pipes == 2 ||
+	    num_joined_pipes == 4)
+		num_vdsc_instances *= num_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_crtc_is_ultrajoiner(crtc_state) &&
+	       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