[Intel-gfx] [PATCH] drm/i915/adl_s: Add gmbus pin mapping

[Anand Moon]

Add table to map the GMBUS pin pairs to GPIO registers and port to DDC
mapping for ADL_S as per below Bspec.

Bspec:20124, 53597.

Cc: Aditya Swarup <aditya.swarup at intel.com>
Cc: Matt Roper <matthew.d.roper at intel.com>
Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Signed-off-by: Anand Moon <anandx.ram.moon at intel.com>
---
 drivers/gpu/drm/i915/display/intel_gmbus.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c b/drivers/gpu/drm/i915/display/intel_gmbus.c
index 0c952e1d720e..58b8e42d4f90 100644
--- a/drivers/gpu/drm/i915/display/intel_gmbus.c
+++ b/drivers/gpu/drm/i915/display/intel_gmbus.c
@@ -52,6 +52,14 @@ static const struct gmbus_pin gmbus_pins[] = {
 	[GMBUS_PIN_DPD] = { "dpd", GPIOF },
 };
 
+static const struct gmbus_pin gmbus_pins_adls[] = {
+	[GMBUS_PIN_1_BXT] = { "edp", GPIOA },
+	[GMBUS_PIN_9_TC1_ICP] = { "tc1", GPIOD },
+	[GMBUS_PIN_10_TC2_ICP] = { "tc2", GPIOE },
+	[GMBUS_PIN_11_TC3_ICP] = { "tc3", GPIOF },
+	[GMBUS_PIN_12_TC4_ICP] = { "tc4", GPIOG },
+};
+
 static const struct gmbus_pin gmbus_pins_bdw[] = {
 	[GMBUS_PIN_VGADDC] = { "vga", GPIOA },
 	[GMBUS_PIN_DPC] = { "dpc", GPIOD },
@@ -101,7 +109,9 @@ static const struct gmbus_pin gmbus_pins_dg1[] = {
 static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *dev_priv,
 					     unsigned int pin)
 {
-	if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)
+	if (INTEL_PCH_TYPE(dev_priv) == PCH_ADP)
+		return &gmbus_pins_adls[pin];
+	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)
 		return &gmbus_pins_dg1[pin];
 	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
 		return &gmbus_pins_icp[pin];
@@ -122,7 +132,9 @@ bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv,
 {
 	unsigned int size;
 
-	if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)
+	if (INTEL_PCH_TYPE(dev_priv) == PCH_ADP)
+		size = ARRAY_SIZE(gmbus_pins_adls);
+	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)
 		size = ARRAY_SIZE(gmbus_pins_dg1);
 	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
 		size = ARRAY_SIZE(gmbus_pins_icp);
-- 
2.30.0