drm/i915/bigjoiner: atomic commit changes for uncompressed joiner

Respective bit for master or slave to be set for uncompressed
bigjoiner in dss_ctl1 register.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Clinton Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210514153711.2359617-16-matthew.d.roper@intel.com

drivers/gpu/drm/i915/display/intel_display.c

@@ -3411,6 +3411,7 @@ static void icl_ddi_bigjoiner_pre_enable(struct intel_atomic_state *state,
 					 const struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *master = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(master->base.dev);
 	struct intel_crtc_state *master_crtc_state;
 	struct drm_connector_state *conn_state;
 	struct drm_connector *conn;
@@ -3444,6 +3445,9 @@ static void icl_ddi_bigjoiner_pre_enable(struct intel_atomic_state *state,
 		/* and DSC on slave */
 		intel_dsc_enable(NULL, crtc_state);
 	}
+
+	if (DISPLAY_VER(dev_priv) >= 13)
+		intel_uncompressed_joiner_enable(crtc_state);
 }
 
 static void hsw_crtc_enable(struct intel_atomic_state *state,
@@ -6250,6 +6254,8 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
 	}
 
 	intel_dsc_get_config(pipe_config);
+	if (DISPLAY_VER(dev_priv) >= 13 && !pipe_config->dsc.compression_enable)
+		intel_uncompressed_joiner_get_config(pipe_config);
 
 	if (!active) {
 		/* bigjoiner slave doesn't enable transcoder */

drivers/gpu/drm/i915/display/intel_vdsc.c

@@ -1021,6 +1021,22 @@ static i915_reg_t dss_ctl2_reg(const struct intel_crtc_state *crtc_state)
 	return is_pipe_dsc(crtc_state) ? ICL_PIPE_DSS_CTL2(pipe) : DSS_CTL2;
 }
 
+void intel_uncompressed_joiner_enable(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 dss_ctl1_val = 0;
+
+	if (crtc_state->bigjoiner && !crtc_state->dsc.compression_enable) {
+		if (crtc_state->bigjoiner_slave)
+			dss_ctl1_val |= UNCOMPRESSED_JOINER_SLAVE;
+		else
+			dss_ctl1_val |= UNCOMPRESSED_JOINER_MASTER;
+
+		intel_de_write(dev_priv, dss_ctl1_reg(crtc_state), dss_ctl1_val);
+	}
+}
+
 void intel_dsc_enable(struct intel_encoder *encoder,
 		      const struct intel_crtc_state *crtc_state)
 {
@@ -1060,13 +1076,35 @@ void intel_dsc_disable(const struct intel_crtc_state *old_crtc_state)
 	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 
-	if (!old_crtc_state->dsc.compression_enable)
+	if (!(old_crtc_state->dsc.compression_enable &&
+	      old_crtc_state->bigjoiner))
 		return;
 
 	intel_de_write(dev_priv, dss_ctl1_reg(old_crtc_state), 0);
 	intel_de_write(dev_priv, dss_ctl2_reg(old_crtc_state), 0);
 }
 
+void intel_uncompressed_joiner_get_config(struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	u32 dss_ctl1;
+
+	dss_ctl1 = intel_de_read(dev_priv, dss_ctl1_reg(crtc_state));
+	if (dss_ctl1 & UNCOMPRESSED_JOINER_MASTER) {
+		crtc_state->bigjoiner = true;
+		if (!WARN_ON(INTEL_NUM_PIPES(dev_priv) == crtc->pipe + 1))
+			crtc_state->bigjoiner_linked_crtc =
+				intel_get_crtc_for_pipe(dev_priv, crtc->pipe + 1);
+	} else if (dss_ctl1 & UNCOMPRESSED_JOINER_SLAVE) {
+		crtc_state->bigjoiner = true;
+		crtc_state->bigjoiner_slave = true;
+		if (!WARN_ON(crtc->pipe == PIPE_A))
+			crtc_state->bigjoiner_linked_crtc =
+				intel_get_crtc_for_pipe(dev_priv, crtc->pipe - 1);
+	}
+}
+
 void intel_dsc_get_config(struct intel_crtc_state *crtc_state)
 {
 	struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;

drivers/gpu/drm/i915/display/intel_vdsc.h

@@ -12,11 +12,13 @@ struct intel_encoder;
 struct intel_crtc_state;
 
 bool intel_dsc_source_support(const struct intel_crtc_state *crtc_state);
+void intel_uncompressed_joiner_enable(const struct intel_crtc_state *crtc_state);
 void intel_dsc_enable(struct intel_encoder *encoder,
 		      const struct intel_crtc_state *crtc_state);
 void intel_dsc_disable(const struct intel_crtc_state *crtc_state);
 int intel_dsc_compute_params(struct intel_encoder *encoder,
 			     struct intel_crtc_state *pipe_config);
+void intel_uncompressed_joiner_get_config(struct intel_crtc_state *crtc_state);
 void intel_dsc_get_config(struct intel_crtc_state *crtc_state);
 enum intel_display_power_domain
 intel_dsc_power_domain(const struct intel_crtc_state *crtc_state);

drivers/gpu/drm/i915/i915_reg.h

@@ -11487,6 +11487,8 @@ enum skl_power_gate {
 #define  SPLITTER_CONFIGURATION_MASK		REG_GENMASK(26, 25)
 #define  SPLITTER_CONFIGURATION_2_SEGMENT	REG_FIELD_PREP(SPLITTER_CONFIGURATION_MASK, 0)
 #define  SPLITTER_CONFIGURATION_4_SEGMENT	REG_FIELD_PREP(SPLITTER_CONFIGURATION_MASK, 1)
+#define  UNCOMPRESSED_JOINER_MASTER		(1 << 21)
+#define  UNCOMPRESSED_JOINER_SLAVE		(1 << 20)
 
 #define _ICL_PIPE_DSS_CTL2_PB			0x78204
 #define _ICL_PIPE_DSS_CTL2_PC			0x78404