[Intel-gfx] [PATCH v3 4/7] drm/i915/tgl: move DP_TP_* to transcoder

Lucas De Marchi lucas.demarchi at intel.com
Thu Aug 29 09:25:51 UTC 2019


Gen 12 onwards moves the DP_TP_* registers to be transcoder-based rather
than port-based. This adds the new register addresses and changes all
the callers to use the register saved in intel_dp->regs.*. This is
filled out when preparing to enable the port so we take into account if
we should use the transcoder or the port.

v2: reimplement by stashing the registers we want to access under
intel_dp->reg. Now they are initialized when enabling the port.
Ville suggested to store the transcoder to be used exclusively
by TGL+. After implementing I thought just storing the register directly
made it cleaner.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c      | 43 ++++++++++++-------
 .../drm/i915/display/intel_display_types.h    |  9 ++++
 drivers/gpu/drm/i915/display/intel_dp.c       | 13 +++---
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  8 ++--
 drivers/gpu/drm/i915/i915_reg.h               |  4 ++
 5 files changed, 51 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index df3e4fe7e3e9..73f7a4b0f6c2 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3164,17 +3164,18 @@ static void intel_ddi_enable_fec(struct intel_encoder *encoder,
 				 const struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum port port = encoder->port;
+	struct intel_dp *intel_dp;
 	u32 val;
 
 	if (!crtc_state->fec_enable)
 		return;
 
-	val = I915_READ(DP_TP_CTL(port));
+	intel_dp = enc_to_intel_dp(&encoder->base);
+	val = I915_READ(intel_dp->regs.dp_tp_ctl);
 	val |= DP_TP_CTL_FEC_ENABLE;
-	I915_WRITE(DP_TP_CTL(port), val);
+	I915_WRITE(intel_dp->regs.dp_tp_ctl, val);
 
-	if (intel_de_wait_for_set(dev_priv, DP_TP_STATUS(port),
+	if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status,
 				  DP_TP_STATUS_FEC_ENABLE_LIVE, 1))
 		DRM_ERROR("Timed out waiting for FEC Enable Status\n");
 }
@@ -3183,16 +3184,17 @@ static void intel_ddi_disable_fec_state(struct intel_encoder *encoder,
 					const struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum port port = encoder->port;
+	struct intel_dp *intel_dp;
 	u32 val;
 
 	if (!crtc_state->fec_enable)
 		return;
 
-	val = I915_READ(DP_TP_CTL(port));
+	intel_dp = enc_to_intel_dp(&encoder->base);
+	val = I915_READ(intel_dp->regs.dp_tp_ctl);
 	val &= ~DP_TP_CTL_FEC_ENABLE;
-	I915_WRITE(DP_TP_CTL(port), val);
-	POSTING_READ(DP_TP_CTL(port));
+	I915_WRITE(intel_dp->regs.dp_tp_ctl, val);
+	POSTING_READ(intel_dp->regs.dp_tp_ctl);
 }
 
 static void tgl_ddi_pre_enable_dp(struct intel_encoder *encoder,
@@ -3205,10 +3207,14 @@ static void tgl_ddi_pre_enable_dp(struct intel_encoder *encoder,
 	struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
 	bool is_mst = intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST);
 	int level = intel_ddi_dp_level(intel_dp);
+	enum transcoder transcoder = crtc_state->cpu_transcoder;
 
 	intel_dp_set_link_params(intel_dp, crtc_state->port_clock,
 				 crtc_state->lane_count, is_mst);
 
+	intel_dp->regs.dp_tp_ctl = TGL_DP_TP_CTL(transcoder);
+	intel_dp->regs.dp_tp_status = TGL_DP_TP_STATUS(transcoder);
+
 	/* 1.a got on intel_atomic_commit_tail() */
 
 	/* 2. */
@@ -3297,6 +3303,9 @@ static void hsw_ddi_pre_enable_dp(struct intel_encoder *encoder,
 	intel_dp_set_link_params(intel_dp, crtc_state->port_clock,
 				 crtc_state->lane_count, is_mst);
 
+	intel_dp->regs.dp_tp_ctl = DP_TP_CTL(port);
+	intel_dp->regs.dp_tp_status = DP_TP_STATUS(port);
+
 	intel_edp_panel_on(intel_dp);
 
 	intel_ddi_clk_select(encoder, crtc_state);
@@ -3463,10 +3472,12 @@ static void intel_disable_ddi_buf(struct intel_encoder *encoder,
 	}
 
 	if (intel_encoder_is_dp(encoder)) {
-		val = I915_READ(DP_TP_CTL(port));
+		struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
+
+		val = I915_READ(intel_dp->regs.dp_tp_ctl);
 		val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
 		val |= DP_TP_CTL_LINK_TRAIN_PAT1;
-		I915_WRITE(DP_TP_CTL(port), val);
+		I915_WRITE(intel_dp->regs.dp_tp_ctl, val);
 	}
 
 	/* Disable FEC in DP Sink */
@@ -3895,7 +3906,7 @@ static void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
 	u32 val;
 	bool wait = false;
 
-	if (I915_READ(DP_TP_CTL(port)) & DP_TP_CTL_ENABLE) {
+	if (I915_READ(intel_dp->regs.dp_tp_ctl) & DP_TP_CTL_ENABLE) {
 		val = I915_READ(DDI_BUF_CTL(port));
 		if (val & DDI_BUF_CTL_ENABLE) {
 			val &= ~DDI_BUF_CTL_ENABLE;
@@ -3903,11 +3914,11 @@ static void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
 			wait = true;
 		}
 
-		val = I915_READ(DP_TP_CTL(port));
+		val = I915_READ(intel_dp->regs.dp_tp_ctl);
 		val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
 		val |= DP_TP_CTL_LINK_TRAIN_PAT1;
-		I915_WRITE(DP_TP_CTL(port), val);
-		POSTING_READ(DP_TP_CTL(port));
+		I915_WRITE(intel_dp->regs.dp_tp_ctl, val);
+		POSTING_READ(intel_dp->regs.dp_tp_ctl);
 
 		if (wait)
 			intel_wait_ddi_buf_idle(dev_priv, port);
@@ -3922,8 +3933,8 @@ static void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
 		if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
 			val |= DP_TP_CTL_ENHANCED_FRAME_ENABLE;
 	}
-	I915_WRITE(DP_TP_CTL(port), val);
-	POSTING_READ(DP_TP_CTL(port));
+	I915_WRITE(intel_dp->regs.dp_tp_ctl, val);
+	POSTING_READ(intel_dp->regs.dp_tp_ctl);
 
 	intel_dp->DP |= DDI_BUF_CTL_ENABLE;
 	I915_WRITE(DDI_BUF_CTL(port), intel_dp->DP);
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 96514dcc7812..3745553ac3ec 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1211,6 +1211,15 @@ struct intel_dp {
 	bool can_mst; /* this port supports mst */
 	bool is_mst;
 	int active_mst_links;
+
+	/*
+	 * DP_TP_* registers may be either on port or transcoder register space.
+	 */
+	struct {
+		i915_reg_t dp_tp_ctl;
+		i915_reg_t dp_tp_status;
+	} regs;
+
 	/* connector directly attached - won't be use for modeset in mst world */
 	struct intel_connector *attached_connector;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 00c3752fa197..938e6e7cccf1 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2288,6 +2288,9 @@ static void intel_dp_prepare(struct intel_encoder *encoder,
 				 intel_crtc_has_type(pipe_config,
 						     INTEL_OUTPUT_DP_MST));
 
+	intel_dp->regs.dp_tp_ctl = DP_TP_CTL(port);
+	intel_dp->regs.dp_tp_status = DP_TP_STATUS(port);
+
 	/*
 	 * There are four kinds of DP registers:
 	 *
@@ -3237,7 +3240,7 @@ _intel_dp_set_link_train(struct intel_dp *intel_dp,
 			      dp_train_pat & train_pat_mask);
 
 	if (HAS_DDI(dev_priv)) {
-		u32 temp = I915_READ(DP_TP_CTL(port));
+		u32 temp = I915_READ(intel_dp->regs.dp_tp_ctl);
 
 		if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
 			temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
@@ -3263,7 +3266,7 @@ _intel_dp_set_link_train(struct intel_dp *intel_dp,
 			temp |= DP_TP_CTL_LINK_TRAIN_PAT4;
 			break;
 		}
-		I915_WRITE(DP_TP_CTL(port), temp);
+		I915_WRITE(intel_dp->regs.dp_tp_ctl, temp);
 
 	} else if ((IS_IVYBRIDGE(dev_priv) && port == PORT_A) ||
 		   (HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
@@ -3961,10 +3964,10 @@ void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
 	if (!HAS_DDI(dev_priv))
 		return;
 
-	val = I915_READ(DP_TP_CTL(port));
+	val = I915_READ(intel_dp->regs.dp_tp_ctl);
 	val &= ~DP_TP_CTL_LINK_TRAIN_MASK;
 	val |= DP_TP_CTL_LINK_TRAIN_IDLE;
-	I915_WRITE(DP_TP_CTL(port), val);
+	I915_WRITE(intel_dp->regs.dp_tp_ctl, val);
 
 	/*
 	 * Until TGL on PORT_A we can have only eDP in SST mode. There the only
@@ -3976,7 +3979,7 @@ void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
 	if (port == PORT_A && INTEL_GEN(dev_priv) < 12)
 		return;
 
-	if (intel_de_wait_for_set(dev_priv, DP_TP_STATUS(port),
+	if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status,
 				  DP_TP_STATUS_IDLE_DONE, 1))
 		DRM_ERROR("Timed out waiting for DP idle patterns\n");
 }
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 2c5ac3dd647f..2774126ca9ac 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -287,7 +287,6 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 	struct intel_digital_port *intel_dig_port = intel_mst->primary;
 	struct intel_dp *intel_dp = &intel_dig_port->dp;
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum port port = intel_dig_port->base.port;
 	struct intel_connector *connector =
 		to_intel_connector(conn_state->connector);
 	int ret;
@@ -318,8 +317,8 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder,
 		DRM_ERROR("failed to allocate vcpi\n");
 
 	intel_dp->active_mst_links++;
-	temp = I915_READ(DP_TP_STATUS(port));
-	I915_WRITE(DP_TP_STATUS(port), temp);
+	temp = I915_READ(intel_dp->regs.dp_tp_status);
+	I915_WRITE(intel_dp->regs.dp_tp_status, temp);
 
 	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
 
@@ -334,11 +333,10 @@ static void intel_mst_enable_dp(struct intel_encoder *encoder,
 	struct intel_digital_port *intel_dig_port = intel_mst->primary;
 	struct intel_dp *intel_dp = &intel_dig_port->dp;
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-	enum port port = intel_dig_port->base.port;
 
 	DRM_DEBUG_KMS("active links %d\n", intel_dp->active_mst_links);
 
-	if (intel_de_wait_for_set(dev_priv, DP_TP_STATUS(port),
+	if (intel_de_wait_for_set(dev_priv, intel_dp->regs.dp_tp_status,
 				  DP_TP_STATUS_ACT_SENT, 1))
 		DRM_ERROR("Timed out waiting for ACT sent\n");
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 33d9d141ee8f..1c8fab11ed9d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -9451,7 +9451,9 @@ enum skl_power_gate {
 /* DisplayPort Transport Control */
 #define _DP_TP_CTL_A			0x64040
 #define _DP_TP_CTL_B			0x64140
+#define _TGL_DP_TP_CTL_A		0x60540
 #define DP_TP_CTL(port) _MMIO_PORT(port, _DP_TP_CTL_A, _DP_TP_CTL_B)
+#define TGL_DP_TP_CTL(tran) _MMIO_TRANS2((tran), _TGL_DP_TP_CTL_A)
 #define  DP_TP_CTL_ENABLE			(1 << 31)
 #define  DP_TP_CTL_FEC_ENABLE			(1 << 30)
 #define  DP_TP_CTL_MODE_SST			(0 << 27)
@@ -9471,7 +9473,9 @@ enum skl_power_gate {
 /* DisplayPort Transport Status */
 #define _DP_TP_STATUS_A			0x64044
 #define _DP_TP_STATUS_B			0x64144
+#define _TGL_DP_TP_STATUS_A		0x60544
 #define DP_TP_STATUS(port) _MMIO_PORT(port, _DP_TP_STATUS_A, _DP_TP_STATUS_B)
+#define TGL_DP_TP_STATUS(tran) _MMIO_TRANS2((tran), _TGL_DP_TP_STATUS_A)
 #define  DP_TP_STATUS_FEC_ENABLE_LIVE		(1 << 28)
 #define  DP_TP_STATUS_IDLE_DONE			(1 << 25)
 #define  DP_TP_STATUS_ACT_SENT			(1 << 24)
-- 
2.23.0



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