drm/i915/cnl: Add AUX-F support

On some Cannonlake SKUs we have a dedicated Aux for port F,
that is only the full split between port A and port E.

There is still no Aux E for Port E, as in previous platforms,
because port_E still means shared lanes with port A.

v2: Rebase.
v3: Add couple missed PORT_F cases on intel_dp.
v4: Rebase and fix commit message.
v5: Squash Imre's "drm/i915: Add missing AUX_F power well string"
v6: Rebase on top of display headers rework.
v7: s/IS_CANNONLAKE/IS_CNL_WITH_PORT_F (DK)
v8: Fix Aux bits for Port F (DK)
v9: Fix VBT definition of Port F (DK).
v10: Squash power well addition to this patch to avoid
     warns as pointed by DK.
v11: Clean up squashed commit message. (David)
v12: Remove unnecessary handling for older platforms (DK)
     Adding AUX_F to PG2 following other existent ones. (DK)

Cc: David Weinehall <david.weinehall@linux.intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Imre Deak <imre.deak@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/20180129232223.766-2-rodrigo.vivi@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -1255,6 +1255,7 @@ enum modeset_restore {
 #define DP_AUX_B 0x10
 #define DP_AUX_C 0x20
 #define DP_AUX_D 0x30
+#define DP_AUX_F 0x60
 
 #define DDC_PIN_B  0x05
 #define DDC_PIN_C  0x04

drivers/gpu/drm/i915/i915_irq.c

@@ -2585,6 +2585,9 @@ gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
 					    GEN9_AUX_CHANNEL_C |
 					    GEN9_AUX_CHANNEL_D;
 
+			if (IS_CNL_WITH_PORT_F(dev_priv))
+				tmp_mask |= CNL_AUX_CHANNEL_F;
+
 			if (iir & tmp_mask) {
 				dp_aux_irq_handler(dev_priv);
 				found = true;
@@ -3617,6 +3620,9 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
 		de_pipe_masked |= GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
 	}
 
+	if (IS_CNL_WITH_PORT_F(dev_priv))
+		de_port_masked |= CNL_AUX_CHANNEL_F;
+
 	de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
 					   GEN8_PIPE_FIFO_UNDERRUN;
 

drivers/gpu/drm/i915/i915_reg.h

@@ -1312,6 +1312,7 @@ enum i915_power_well_id {
 	CNL_DISP_PW_AUX_B = GLK_DISP_PW_AUX_B,
 	CNL_DISP_PW_AUX_C = GLK_DISP_PW_AUX_C,
 	CNL_DISP_PW_AUX_D,
+	CNL_DISP_PW_AUX_F,
 
 	SKL_DISP_PW_1 = 14,
 	SKL_DISP_PW_2,
@@ -5283,6 +5284,13 @@ enum {
 #define _DPD_AUX_CH_DATA4	(dev_priv->info.display_mmio_offset + 0x64320)
 #define _DPD_AUX_CH_DATA5	(dev_priv->info.display_mmio_offset + 0x64324)
 
+#define _DPF_AUX_CH_CTL		(dev_priv->info.display_mmio_offset + 0x64510)
+#define _DPF_AUX_CH_DATA1	(dev_priv->info.display_mmio_offset + 0x64514)
+#define _DPF_AUX_CH_DATA2	(dev_priv->info.display_mmio_offset + 0x64518)
+#define _DPF_AUX_CH_DATA3	(dev_priv->info.display_mmio_offset + 0x6451c)
+#define _DPF_AUX_CH_DATA4	(dev_priv->info.display_mmio_offset + 0x64520)
+#define _DPF_AUX_CH_DATA5	(dev_priv->info.display_mmio_offset + 0x64524)
+
 #define DP_AUX_CH_CTL(port)	_MMIO_PORT(port, _DPA_AUX_CH_CTL, _DPB_AUX_CH_CTL)
 #define DP_AUX_CH_DATA(port, i)	_MMIO(_PORT(port, _DPA_AUX_CH_DATA1, _DPB_AUX_CH_DATA1) + (i) * 4) /* 5 registers */
 
@@ -6938,6 +6946,7 @@ enum {
 #define GEN8_DE_PORT_IMR _MMIO(0x44444)
 #define GEN8_DE_PORT_IIR _MMIO(0x44448)
 #define GEN8_DE_PORT_IER _MMIO(0x4444c)
+#define  CNL_AUX_CHANNEL_F		(1 << 28)
 #define  GEN9_AUX_CHANNEL_D		(1 << 27)
 #define  GEN9_AUX_CHANNEL_C		(1 << 26)
 #define  GEN9_AUX_CHANNEL_B		(1 << 25)

drivers/gpu/drm/i915/intel_display.h

@@ -172,6 +172,7 @@ enum intel_display_power_domain {
 	POWER_DOMAIN_AUX_B,
 	POWER_DOMAIN_AUX_C,
 	POWER_DOMAIN_AUX_D,
+	POWER_DOMAIN_AUX_F,
 	POWER_DOMAIN_GMBUS,
 	POWER_DOMAIN_MODESET,
 	POWER_DOMAIN_GT_IRQ,

drivers/gpu/drm/i915/intel_dp.c

@@ -1299,6 +1299,9 @@ static enum port intel_aux_port(struct drm_i915_private *dev_priv,
 	case DP_AUX_D:
 		aux_port = PORT_D;
 		break;
+	case DP_AUX_F:
+		aux_port = PORT_F;
+		break;
 	default:
 		MISSING_CASE(info->alternate_aux_channel);
 		aux_port = PORT_A;
@@ -5998,6 +6001,9 @@ intel_dp_init_connector_port_info(struct intel_digital_port *intel_dig_port)
 		/* FIXME: Check VBT for actual wiring of PORT E */
 		intel_dp->aux_power_domain = POWER_DOMAIN_AUX_D;
 		break;
+	case PORT_F:
+		intel_dp->aux_power_domain = POWER_DOMAIN_AUX_F;
+		break;
 	default:
 		MISSING_CASE(encoder->port);
 	}

drivers/gpu/drm/i915/intel_runtime_pm.c

@@ -124,6 +124,8 @@ intel_display_power_domain_str(enum intel_display_power_domain domain)
 		return "AUX_C";
 	case POWER_DOMAIN_AUX_D:
 		return "AUX_D";
+	case POWER_DOMAIN_AUX_F:
+		return "AUX_F";
 	case POWER_DOMAIN_GMBUS:
 		return "GMBUS";
 	case POWER_DOMAIN_INIT:
@@ -1828,6 +1830,7 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
 	BIT_ULL(POWER_DOMAIN_AUX_B) |                       \
 	BIT_ULL(POWER_DOMAIN_AUX_C) |			\
 	BIT_ULL(POWER_DOMAIN_AUX_D) |			\
+	BIT_ULL(POWER_DOMAIN_AUX_F) |			\
 	BIT_ULL(POWER_DOMAIN_AUDIO) |			\
 	BIT_ULL(POWER_DOMAIN_VGA) |				\
 	BIT_ULL(POWER_DOMAIN_INIT))
@@ -1855,6 +1858,9 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
 #define CNL_DISPLAY_AUX_D_POWER_DOMAINS (		\
 	BIT_ULL(POWER_DOMAIN_AUX_D) |			\
 	BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_F_POWER_DOMAINS (		\
+	BIT_ULL(POWER_DOMAIN_AUX_F) |			\
+	BIT_ULL(POWER_DOMAIN_INIT))
 #define CNL_DISPLAY_DC_OFF_POWER_DOMAINS (		\
 	CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS |		\
 	BIT_ULL(POWER_DOMAIN_GT_IRQ) |			\
@@ -2405,6 +2411,12 @@ static struct i915_power_well cnl_power_wells[] = {
 		.ops = &hsw_power_well_ops,
 		.id = SKL_DISP_PW_DDI_D,
 	},
+	{
+		.name = "AUX F",
+		.domains = CNL_DISPLAY_AUX_F_POWER_DOMAINS,
+		.ops = &hsw_power_well_ops,
+		.id = CNL_DISP_PW_AUX_F,
+	},
 };
 
 static int
@@ -2520,6 +2532,16 @@ int intel_power_domains_init(struct drm_i915_private *dev_priv)
 		set_power_wells(power_domains, skl_power_wells);
 	} else if (IS_CANNONLAKE(dev_priv)) {
 		set_power_wells(power_domains, cnl_power_wells);
+
+		/*
+		 * Aux IO is getting enabled for all ports
+		 * regardless the presence or use. So, in order to avoid
+		 * timeouts, lets remove it from the list
+		 * for the SKUs without port F.
+		 */
+		if (!IS_CNL_WITH_PORT_F(dev_priv))
+			power_domains->power_well_count -= 1;
+
 	} else if (IS_BROXTON(dev_priv)) {
 		set_power_wells(power_domains, bxt_power_wells);
 	} else if (IS_GEMINILAKE(dev_priv)) {