drm/i915/cnl: Enable DDI-F on Cannonlake.

Now let's finish the Port-F support by adding the
proper port F detection, irq and power well support.

v2: Rebase
v3: Use BIT_ULL
v4: Cover missed case on ddi init.
v5: Update commit message.
v6: Rebase on top of display headers rework.
v7: Squash power-well handling related to DDI F to this
    patch to avoid warns as pointed out by DK.
v8: Introduce DDI_F_LANES to PG2. (DK)
v9: Squash in the PORT_F case for enabling DP MST encoder. (DK)

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180129232223.766-9-rodrigo.vivi@intel.com

drivers/gpu/drm/i915/i915_reg.h

@@ -1304,6 +1304,7 @@ enum i915_power_well_id {
 	SKL_DISP_PW_DDI_B,
 	SKL_DISP_PW_DDI_C,
 	SKL_DISP_PW_DDI_D,
+	CNL_DISP_PW_DDI_F = 6,
 
 	GLK_DISP_PW_AUX_A = 8,
 	GLK_DISP_PW_AUX_B,
@@ -8860,6 +8861,7 @@ enum skl_power_gate {
 #define  SFUSE_STRAP_RAW_FREQUENCY	(1<<8)
 #define  SFUSE_STRAP_DISPLAY_DISABLED	(1<<7)
 #define  SFUSE_STRAP_CRT_DISABLED	(1<<6)
+#define  SFUSE_STRAP_DDIF_DETECTED	(1<<3)
 #define  SFUSE_STRAP_DDIB_DETECTED	(1<<2)
 #define  SFUSE_STRAP_DDIC_DETECTED	(1<<1)
 #define  SFUSE_STRAP_DDID_DETECTED	(1<<0)

drivers/gpu/drm/i915/intel_ddi.c

@@ -2910,6 +2910,10 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
 		intel_dig_port->ddi_io_power_domain =
 			POWER_DOMAIN_PORT_DDI_E_IO;
 		break;
+	case PORT_F:
+		intel_dig_port->ddi_io_power_domain =
+			POWER_DOMAIN_PORT_DDI_F_IO;
+		break;
 	default:
 		MISSING_CASE(port);
 	}

drivers/gpu/drm/i915/intel_display.c

@@ -5671,6 +5671,8 @@ enum intel_display_power_domain intel_port_to_power_domain(enum port port)
 		return POWER_DOMAIN_PORT_DDI_D_LANES;
 	case PORT_E:
 		return POWER_DOMAIN_PORT_DDI_E_LANES;
+	case PORT_F:
+		return POWER_DOMAIN_PORT_DDI_F_LANES;
 	default:
 		MISSING_CASE(port);
 		return POWER_DOMAIN_PORT_OTHER;
@@ -13624,7 +13626,7 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 		if (found || IS_GEN9_BC(dev_priv))
 			intel_ddi_init(dev_priv, PORT_A);
 
-		/* DDI B, C and D detection is indicated by the SFUSE_STRAP
+		/* DDI B, C, D, and F detection is indicated by the SFUSE_STRAP
 		 * register */
 		found = I915_READ(SFUSE_STRAP);
 
@@ -13634,6 +13636,8 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 			intel_ddi_init(dev_priv, PORT_C);
 		if (found & SFUSE_STRAP_DDID_DETECTED)
 			intel_ddi_init(dev_priv, PORT_D);
+		if (found & SFUSE_STRAP_DDIF_DETECTED)
+			intel_ddi_init(dev_priv, PORT_F);
 		/*
 		 * On SKL we don't have a way to detect DDI-E so we rely on VBT.
 		 */

drivers/gpu/drm/i915/intel_display.h

@@ -157,11 +157,13 @@ enum intel_display_power_domain {
 	POWER_DOMAIN_PORT_DDI_C_LANES,
 	POWER_DOMAIN_PORT_DDI_D_LANES,
 	POWER_DOMAIN_PORT_DDI_E_LANES,
+	POWER_DOMAIN_PORT_DDI_F_LANES,
 	POWER_DOMAIN_PORT_DDI_A_IO,
 	POWER_DOMAIN_PORT_DDI_B_IO,
 	POWER_DOMAIN_PORT_DDI_C_IO,
 	POWER_DOMAIN_PORT_DDI_D_IO,
 	POWER_DOMAIN_PORT_DDI_E_IO,
+	POWER_DOMAIN_PORT_DDI_F_IO,
 	POWER_DOMAIN_PORT_DSI,
 	POWER_DOMAIN_PORT_CRT,
 	POWER_DOMAIN_PORT_OTHER,

drivers/gpu/drm/i915/intel_dp.c

@@ -6132,7 +6132,8 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 
 	/* init MST on ports that can support it */
 	if (HAS_DP_MST(dev_priv) && !intel_dp_is_edp(intel_dp) &&
-	    (port == PORT_B || port == PORT_C || port == PORT_D))
+	    (port == PORT_B || port == PORT_C ||
+	     port == PORT_D || port == PORT_F))
 		intel_dp_mst_encoder_init(intel_dig_port,
 					  intel_connector->base.base.id);
 

drivers/gpu/drm/i915/intel_runtime_pm.c

@@ -94,6 +94,8 @@ intel_display_power_domain_str(enum intel_display_power_domain domain)
 		return "PORT_DDI_D_LANES";
 	case POWER_DOMAIN_PORT_DDI_E_LANES:
 		return "PORT_DDI_E_LANES";
+	case POWER_DOMAIN_PORT_DDI_F_LANES:
+		return "PORT_DDI_F_LANES";
 	case POWER_DOMAIN_PORT_DDI_A_IO:
 		return "PORT_DDI_A_IO";
 	case POWER_DOMAIN_PORT_DDI_B_IO:
@@ -104,6 +106,8 @@ intel_display_power_domain_str(enum intel_display_power_domain domain)
 		return "PORT_DDI_D_IO";
 	case POWER_DOMAIN_PORT_DDI_E_IO:
 		return "PORT_DDI_E_IO";
+	case POWER_DOMAIN_PORT_DDI_F_IO:
+		return "PORT_DDI_F_IO";
 	case POWER_DOMAIN_PORT_DSI:
 		return "PORT_DSI";
 	case POWER_DOMAIN_PORT_CRT:
@@ -1827,6 +1831,7 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
 	BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |		\
 	BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |		\
 	BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) |		\
 	BIT_ULL(POWER_DOMAIN_AUX_B) |                       \
 	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
 	BIT_ULL(POWER_DOMAIN_AUX_D) |			\
@@ -1861,6 +1866,9 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
 #define CNL_DISPLAY_AUX_F_POWER_DOMAINS (		\
 	BIT_ULL(POWER_DOMAIN_AUX_F) |			\
 	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) |		\
+	BIT_ULL(POWER_DOMAIN_INIT))
 #define CNL_DISPLAY_DC_OFF_POWER_DOMAINS (		\
 	CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS |		\
 	BIT_ULL(POWER_DOMAIN_GT_IRQ) |			\
@@ -2411,6 +2419,12 @@ static struct i915_power_well cnl_power_wells[] = {
 		.ops = &hsw_power_well_ops,
 		.id = SKL_DISP_PW_DDI_D,
 	},
+	{
+		.name = "DDI F IO power well",
+		.domains = CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = CNL_DISP_PW_DDI_F,
+	},
 	{
 		.name = "AUX F",
 		.domains = CNL_DISPLAY_AUX_F_POWER_DOMAINS,
@@ -2534,13 +2548,13 @@ int intel_power_domains_init(struct drm_i915_private *dev_priv)
 		set_power_wells(power_domains, cnl_power_wells);
 
 		/*
-		 * Aux IO is getting enabled for all ports
+		 * DDI and Aux IO are getting enabled for all ports
 		 * regardless the presence or use. So, in order to avoid
-		 * timeouts, lets remove it from the list
+		 * timeouts, lets remove them from the list
 		 * for the SKUs without port F.
 		 */
 		if (!IS_CNL_WITH_PORT_F(dev_priv))
-			power_domains->power_well_count -= 1;
+			power_domains->power_well_count -= 2;
 
 	} else if (IS_BROXTON(dev_priv)) {
 		set_power_wells(power_domains, bxt_power_wells);