[Intel-gfx] [PATCH V4] drm/i915/gen9_bc : Add TGP PCH support

* [Intel-gfx] [PATCH V4] drm/i915/gen9_bc : Add TGP PCH support
@ 2021-01-08 12:09 Tejas Upadhyay
  2021-01-08 16:21 ` [Intel-gfx] ✓ Fi.CI.BAT: success for drm/i915/gen9_bc : Add TGP PCH support (rev2) Patchwork
                   ` (2 more replies)
  0 siblings, 3 replies; 8+ messages in thread
From: Tejas Upadhyay @ 2021-01-08 12:09 UTC (permalink / raw)
  To: intel-gfx, hariom.pandey, jani.nikula, matthew.d.roper

We have TGP PCH support for Tigerlake and Rocketlake. Similarly
now TGP PCH can be used with Cometlake CPU.

Changes since V3 :
	- Rebased to top drm-tip commit
	- dev_priv replaced with i915 for new API
	- Enable default Port B,C,D detection for TGP && GEN9_BC
Changes since V2 :
        - IS_COMETLAKE replaced with IS_GEN9_BC
        - VBT ddc pin remapping added
        - Added dedicated HPD pin and DDC pin handling API
Changes since V1 :
        - Matched HPD Pin mapping for PORT C and PORT D of CML CPU.

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c    |  9 +++++++++
 drivers/gpu/drm/i915/display/intel_ddi.c     |  7 +++++--
 drivers/gpu/drm/i915/display/intel_display.c |  9 ++++++++-
 drivers/gpu/drm/i915/display/intel_hdmi.c    | 20 ++++++++++++++++++++
 drivers/gpu/drm/i915/intel_pch.c             |  3 ++-
 5 files changed, 44 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 987cf509337f..730b7f45e5d4 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -1630,6 +1630,12 @@ static const u8 rkl_pch_tgp_ddc_pin_map[] = {
 	[RKL_DDC_BUS_DDI_E] = GMBUS_PIN_10_TC2_ICP,
 };
 
+static const u8 gen9bc_tgp_ddc_pin_map[] = {
+	[DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
+	[DDC_BUS_DDI_C] = GMBUS_PIN_9_TC1_ICP,
+	[DDC_BUS_DDI_D] = GMBUS_PIN_10_TC2_ICP,
+};
+
 static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
 {
 	const u8 *ddc_pin_map;
@@ -1640,6 +1646,9 @@ static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
 	} else if (IS_ROCKETLAKE(dev_priv) && INTEL_PCH_TYPE(dev_priv) == PCH_TGP) {
 		ddc_pin_map = rkl_pch_tgp_ddc_pin_map;
 		n_entries = ARRAY_SIZE(rkl_pch_tgp_ddc_pin_map);
+	} else if (HAS_PCH_TGP(dev_priv) && IS_GEN9_BC(dev_priv)) {
+		ddc_pin_map = gen9bc_tgp_ddc_pin_map;
+		n_entries = ARRAY_SIZE(gen9bc_tgp_ddc_pin_map);
 	} else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) {
 		ddc_pin_map = icp_ddc_pin_map;
 		n_entries = ARRAY_SIZE(icp_ddc_pin_map);
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 3df6913369bc..13f1268e2cff 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -5337,7 +5337,9 @@ static enum hpd_pin dg1_hpd_pin(struct drm_i915_private *dev_priv,
 static enum hpd_pin tgl_hpd_pin(struct drm_i915_private *dev_priv,
 				enum port port)
 {
-	if (port >= PORT_TC1)
+	if (IS_GEN9_BC(dev_priv) && port >= PORT_C)
+		return HPD_PORT_TC1 + port - PORT_C;
+	else if (port >= PORT_TC1)
 		return HPD_PORT_TC1 + port - PORT_TC1;
 	else
 		return HPD_PORT_A + port - PORT_A;
@@ -5493,7 +5495,8 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 		encoder->hpd_pin = dg1_hpd_pin(dev_priv, port);
 	else if (IS_ROCKETLAKE(dev_priv))
 		encoder->hpd_pin = rkl_hpd_pin(dev_priv, port);
-	else if (INTEL_GEN(dev_priv) >= 12)
+	else if (INTEL_GEN(dev_priv) >= 12 || (IS_GEN9_BC(dev_priv) &&
+					       HAS_PCH_TGP(dev_priv)))
 		encoder->hpd_pin = tgl_hpd_pin(dev_priv, port);
 	else if (IS_JSL_EHL(dev_priv))
 		encoder->hpd_pin = ehl_hpd_pin(dev_priv, port);
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 0189d379a55e..81c93c49ddef 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -16212,7 +16212,14 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 
 		/* DDI B, C, D, and F detection is indicated by the SFUSE_STRAP
 		 * register */
-		found = intel_de_read(dev_priv, SFUSE_STRAP);
+		if (HAS_PCH_TGP(dev_priv)) {
+			/* W/A due to lack of STRAP config on TGP PCH*/
+			found = (SFUSE_STRAP_DDIB_DETECTED |
+				 SFUSE_STRAP_DDIC_DETECTED |
+				 SFUSE_STRAP_DDID_DETECTED);
+		} else {
+			found = intel_de_read(dev_priv, SFUSE_STRAP);
+		}
 
 		if (found & SFUSE_STRAP_DDIB_DETECTED)
 			intel_ddi_init(dev_priv, PORT_B);
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index c5959590562b..aa3b4a659f96 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -3130,6 +3130,24 @@ static u8 rkl_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
 	return GMBUS_PIN_1_BXT + phy;
 }
 
+static u8 gen9bc_port_to_ddc_pin(struct drm_i915_private *i915, enum port port)
+{
+	enum phy phy = intel_port_to_phy(i915, port);
+
+	drm_WARN_ON(&i915->drm, port == PORT_A);
+
+	/*
+	 * Pin mapping for GEN9 BC depends on which PCH is present.  With TGP,
+	 * final two outputs use type-c pins, even though they're actually
+	 * combo outputs.  With CMP, the traditional DDI A-D pins are used for
+	 * all outputs.
+	 */
+	if (INTEL_PCH_TYPE(i915) >= PCH_TGP && phy >= PHY_C)
+		return GMBUS_PIN_9_TC1_ICP + phy - PHY_C;
+
+	return GMBUS_PIN_1_BXT + phy;
+}
+
 static u8 dg1_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
 {
 	return intel_port_to_phy(dev_priv, port) + 1;
@@ -3176,6 +3194,8 @@ static u8 intel_hdmi_ddc_pin(struct intel_encoder *encoder)
 		ddc_pin = dg1_port_to_ddc_pin(dev_priv, port);
 	else if (IS_ROCKETLAKE(dev_priv))
 		ddc_pin = rkl_port_to_ddc_pin(dev_priv, port);
+	else if (IS_GEN9_BC(dev_priv) && HAS_PCH_TGP(dev_priv))
+		ddc_pin = gen9bc_port_to_ddc_pin(dev_priv, port);
 	else if (HAS_PCH_MCC(dev_priv))
 		ddc_pin = mcc_port_to_ddc_pin(dev_priv, port);
 	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
diff --git a/drivers/gpu/drm/i915/intel_pch.c b/drivers/gpu/drm/i915/intel_pch.c
index f31c0dabd0cc..c1bc2d032360 100644
--- a/drivers/gpu/drm/i915/intel_pch.c
+++ b/drivers/gpu/drm/i915/intel_pch.c
@@ -121,7 +121,8 @@ intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
 	case INTEL_PCH_TGP2_DEVICE_ID_TYPE:
 		drm_dbg_kms(&dev_priv->drm, "Found Tiger Lake LP PCH\n");
 		drm_WARN_ON(&dev_priv->drm, !IS_TIGERLAKE(dev_priv) &&
-			    !IS_ROCKETLAKE(dev_priv));
+			    !IS_ROCKETLAKE(dev_priv) &&
+			    !IS_GEN9_BC(dev_priv));
 		return PCH_TGP;
 	case INTEL_PCH_JSP_DEVICE_ID_TYPE:
 	case INTEL_PCH_JSP2_DEVICE_ID_TYPE:
-- 
2.30.0

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