[Intel-gfx] [PATCH 17/28] drm/i915/tgl: Add gmbus gpio pin to port mapping

[Lucas De Marchi]

From: Mahesh Kumar <mahesh1.kumar at intel.com>

Add default GPIO pin mapping for all ports. Tiger Lake has 3 combophy
ports and 6 TC ports, gpio pin1-3 are mapped to combophy & pin9-14 are
mapped to TC ports.

Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: Mahesh Kumar <mahesh1.kumar at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.h |  2 ++
 drivers/gpu/drm/i915/display/intel_gmbus.c   | 20 ++++++++++++++++++--
 drivers/gpu/drm/i915/i915_reg.h              |  4 +++-
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 09e517068262..b5d6ae953d0f 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -45,6 +45,8 @@ enum i915_gpio {
 	GPIOK,
 	GPIOL,
 	GPIOM,
+	GPION,
+	GPIOO,
 };
 
 /*
diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c b/drivers/gpu/drm/i915/display/intel_gmbus.c
index 4f6a9bd5af47..b42c79aea61a 100644
--- a/drivers/gpu/drm/i915/display/intel_gmbus.c
+++ b/drivers/gpu/drm/i915/display/intel_gmbus.c
@@ -94,11 +94,25 @@ static const struct gmbus_pin gmbus_pins_mcc[] = {
 	[GMBUS_PIN_9_TC1_ICP] = { "dpc", GPIOJ },
 };
 
+static const struct gmbus_pin gmbus_pins_tgp[] = {
+	[GMBUS_PIN_1_BXT] = { "dpa", GPIOB },
+	[GMBUS_PIN_2_BXT] = { "dpb", GPIOC },
+	[GMBUS_PIN_3_BXT] = { "dpc", GPIOD },
+	[GMBUS_PIN_9_TC1_ICP] = { "tc1", GPIOJ },
+	[GMBUS_PIN_10_TC2_ICP] = { "tc2", GPIOK },
+	[GMBUS_PIN_11_TC3_ICP] = { "tc3", GPIOL },
+	[GMBUS_PIN_12_TC4_ICP] = { "tc4", GPIOM },
+	[GMBUS_PIN_13_TC5_TGP] = { "tc5", GPION },
+	[GMBUS_PIN_14_TC6_TGP] = { "tc6", GPIOO },
+};
+
 /* pin is expected to be valid */
 static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *dev_priv,
 					     unsigned int pin)
 {
-	if (HAS_PCH_MCC(dev_priv))
+	if (HAS_PCH_TGP(dev_priv))
+		return &gmbus_pins_tgp[pin];
+	else if (HAS_PCH_MCC(dev_priv))
 		return &gmbus_pins_mcc[pin];
 	else if (HAS_PCH_ICP(dev_priv))
 		return &gmbus_pins_icp[pin];
@@ -119,7 +133,9 @@ bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv,
 {
 	unsigned int size;
 
-	if (HAS_PCH_MCC(dev_priv))
+	if (HAS_PCH_TGP(dev_priv))
+		size = ARRAY_SIZE(gmbus_pins_tgp);
+	else if (HAS_PCH_MCC(dev_priv))
 		size = ARRAY_SIZE(gmbus_pins_mcc);
 	else if (HAS_PCH_ICP(dev_priv))
 		size = ARRAY_SIZE(gmbus_pins_icp);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index da708286d452..51b589fe651a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3256,8 +3256,10 @@ enum i915_power_well_id {
 #define   GMBUS_PIN_10_TC2_ICP	10
 #define   GMBUS_PIN_11_TC3_ICP	11
 #define   GMBUS_PIN_12_TC4_ICP	12
+#define   GMBUS_PIN_13_TC5_TGP	13
+#define   GMBUS_PIN_14_TC6_TGP	14
 
-#define   GMBUS_NUM_PINS	13 /* including 0 */
+#define   GMBUS_NUM_PINS	15 /* including 0 */
 #define GMBUS1			_MMIO(dev_priv->gpio_mmio_base + 0x5104) /* command/status */
 #define   GMBUS_SW_CLR_INT	(1 << 31)
 #define   GMBUS_SW_RDY		(1 << 30)
-- 
2.21.0