[PATCH 1/2] drm/i915: Add some essential functionality for joiners

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

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

In most of the cases we now try to avoid mentioning things like
"bigjoiner" or "ultrajoiner" trying to unify the API and refer
mostly to all this functionality as "joiner".
In majority cases that should be way to go.
However in some cases we still need to distinguish between
bigjoiner primaries and secondaries(such as DSC register programming).

Create correspondent helper functions and start using them,
in order be prepared for adding ultrajoiner functionality.

v2: Fixed checkpatch warnings (Ankit)
v3: Introduce ultrajoiner helpers in next patch.
v4: Streamline the helpers and add few more. (Ville)

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 41 ++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_display.h |  2 +
 drivers/gpu/drm/i915/display/intel_vdsc.c    |  4 +-
 3 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index d4a371edfcdd..deacdf82e143 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -254,6 +254,47 @@ static enum pipe joiner_primary_pipe(const struct intel_crtc_state *crtc_state)
 	return ffs(crtc_state->joiner_pipes) - 1;
 }
 
+static bool is_bigjoiner(const struct intel_crtc_state *crtc_state)
+{
+	return hweight8(crtc_state->joiner_pipes) >= 2;
+}
+
+static u8 bigjoiner_primary_pipes(const struct intel_crtc_state *crtc_state)
+{
+	if (!is_bigjoiner(crtc_state))
+		return 0;
+
+	return crtc_state->joiner_pipes & (0b01010101 << joiner_primary_pipe(crtc_state));
+}
+
+static unsigned int bigjoiner_secondary_pipes(const struct intel_crtc_state *crtc_state)
+{
+	if (!is_bigjoiner(crtc_state))
+		return 0;
+
+	return crtc_state->joiner_pipes & (0b10101010 << joiner_primary_pipe(crtc_state));
+}
+
+bool intel_crtc_is_bigjoiner_primary(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+	if (!is_bigjoiner(crtc_state))
+		return false;
+
+	return BIT(crtc->pipe) & bigjoiner_primary_pipes(crtc_state);
+}
+
+bool intel_crtc_is_bigjoiner_secondary(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+	if (!is_bigjoiner(crtc_state))
+		return false;
+
+	return BIT(crtc->pipe) & bigjoiner_secondary_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 7ca26e5cb20e..894f58ead279 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -426,6 +426,8 @@ bool is_trans_port_sync_master(const struct intel_crtc_state *state);
 u8 intel_crtc_joined_pipe_mask(const struct intel_crtc_state *crtc_state);
 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);
 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 2e849b015e74..8158e3702ed5 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -742,7 +742,7 @@ void intel_uncompressed_joiner_enable(const struct intel_crtc_state *crtc_state)
 	u32 dss_ctl1_val = 0;
 
 	if (crtc_state->joiner_pipes && !crtc_state->dsc.compression_enable) {
-		if (intel_crtc_is_joiner_secondary(crtc_state))
+		if (intel_crtc_is_bigjoiner_secondary(crtc_state))
 			dss_ctl1_val |= UNCOMPRESSED_JOINER_SECONDARY;
 		else
 			dss_ctl1_val |= UNCOMPRESSED_JOINER_PRIMARY;
@@ -771,7 +771,7 @@ void intel_dsc_enable(const struct intel_crtc_state *crtc_state)
 	}
 	if (crtc_state->joiner_pipes) {
 		dss_ctl1_val |= BIG_JOINER_ENABLE;
-		if (!intel_crtc_is_joiner_secondary(crtc_state))
+		if (intel_crtc_is_bigjoiner_primary(crtc_state))
 			dss_ctl1_val |= PRIMARY_BIG_JOINER_ENABLE;
 	}
 	intel_de_write(dev_priv, dss_ctl1_reg(crtc, crtc_state->cpu_transcoder), dss_ctl1_val);
-- 
2.45.2