drm/i915/icl: DP_AUX_E is valid on ICL+

Add support for DP_AUX_E. Here we also introduce the bits for the AUX
power well E, however ICL power well support is still not enabled yet,
so the power well is not used.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180612002512.29783-2-paulo.r.zanoni@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -1016,6 +1016,7 @@ enum modeset_restore {
 #define DP_AUX_B 0x10
 #define DP_AUX_C 0x20
 #define DP_AUX_D 0x30
+#define DP_AUX_E 0x50
 #define DP_AUX_F 0x60
 
 #define DDC_PIN_B  0x05

drivers/gpu/drm/i915/i915_irq.c

@@ -2640,6 +2640,9 @@ gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
 					    GEN9_AUX_CHANNEL_C |
 					    GEN9_AUX_CHANNEL_D;
 
+			if (INTEL_GEN(dev_priv) >= 11)
+				tmp_mask |= ICL_AUX_CHANNEL_E;
+
 			if (IS_CNL_WITH_PORT_F(dev_priv) ||
 			    INTEL_GEN(dev_priv) >= 11)
 				tmp_mask |= CNL_AUX_CHANNEL_F;
@@ -3921,6 +3924,9 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
 		de_pipe_masked |= GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
 	}
 
+	if (INTEL_GEN(dev_priv) >= 11)
+		de_port_masked |= ICL_AUX_CHANNEL_E;
+
 	if (IS_CNL_WITH_PORT_F(dev_priv) || INTEL_GEN(dev_priv) >= 11)
 		de_port_masked |= CNL_AUX_CHANNEL_F;
 

drivers/gpu/drm/i915/i915_reg.h

@@ -5315,6 +5315,13 @@ 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 _DPE_AUX_CH_CTL		(dev_priv->info.display_mmio_offset + 0x64410)
+#define _DPE_AUX_CH_DATA1	(dev_priv->info.display_mmio_offset + 0x64414)
+#define _DPE_AUX_CH_DATA2	(dev_priv->info.display_mmio_offset + 0x64418)
+#define _DPE_AUX_CH_DATA3	(dev_priv->info.display_mmio_offset + 0x6441c)
+#define _DPE_AUX_CH_DATA4	(dev_priv->info.display_mmio_offset + 0x64420)
+#define _DPE_AUX_CH_DATA5	(dev_priv->info.display_mmio_offset + 0x64424)
+
 #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)
@@ -7019,6 +7026,7 @@ enum {
 #define GEN8_DE_PORT_IMR _MMIO(0x44444)
 #define GEN8_DE_PORT_IIR _MMIO(0x44448)
 #define GEN8_DE_PORT_IER _MMIO(0x4444c)
+#define  ICL_AUX_CHANNEL_E		(1 << 29)
 #define  CNL_AUX_CHANNEL_F		(1 << 28)
 #define  GEN9_AUX_CHANNEL_D		(1 << 27)
 #define  GEN9_AUX_CHANNEL_C		(1 << 26)

drivers/gpu/drm/i915/intel_display.h

@@ -155,7 +155,7 @@ enum aux_ch {
 	AUX_CH_B,
 	AUX_CH_C,
 	AUX_CH_D,
-	_AUX_CH_E, /* does not exist */
+	AUX_CH_E, /* ICL+ */
 	AUX_CH_F,
 };
 
@@ -196,6 +196,7 @@ enum intel_display_power_domain {
 	POWER_DOMAIN_AUX_B,
 	POWER_DOMAIN_AUX_C,
 	POWER_DOMAIN_AUX_D,
+	POWER_DOMAIN_AUX_E,
 	POWER_DOMAIN_AUX_F,
 	POWER_DOMAIN_AUX_IO_A,
 	POWER_DOMAIN_GMBUS,

drivers/gpu/drm/i915/intel_dp.c

@@ -1347,6 +1347,9 @@ static enum aux_ch intel_aux_ch(struct intel_dp *intel_dp)
 	case DP_AUX_D:
 		aux_ch = AUX_CH_D;
 		break;
+	case DP_AUX_E:
+		aux_ch = AUX_CH_E;
+		break;
 	case DP_AUX_F:
 		aux_ch = AUX_CH_F;
 		break;
@@ -1374,6 +1377,8 @@ intel_aux_power_domain(struct intel_dp *intel_dp)
 		return POWER_DOMAIN_AUX_C;
 	case AUX_CH_D:
 		return POWER_DOMAIN_AUX_D;
+	case AUX_CH_E:
+		return POWER_DOMAIN_AUX_E;
 	case AUX_CH_F:
 		return POWER_DOMAIN_AUX_F;
 	default:
@@ -1460,6 +1465,7 @@ static i915_reg_t skl_aux_ctl_reg(struct intel_dp *intel_dp)
 	case AUX_CH_B:
 	case AUX_CH_C:
 	case AUX_CH_D:
+	case AUX_CH_E:
 	case AUX_CH_F:
 		return DP_AUX_CH_CTL(aux_ch);
 	default:
@@ -1478,6 +1484,7 @@ static i915_reg_t skl_aux_data_reg(struct intel_dp *intel_dp, int index)
 	case AUX_CH_B:
 	case AUX_CH_C:
 	case AUX_CH_D:
+	case AUX_CH_E:
 	case AUX_CH_F:
 		return DP_AUX_CH_DATA(aux_ch, index);
 	default:

drivers/gpu/drm/i915/intel_runtime_pm.c

@@ -128,6 +128,8 @@ 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_E:
+		return "AUX_E";
 	case POWER_DOMAIN_AUX_F:
 		return "AUX_F";
 	case POWER_DOMAIN_AUX_IO_A: