drm/i915: Add 4th pipe and transcoder

Add pipe D and transcoder D to prepare for platforms having them.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190711173115.28296-2-lucas.demarchi@intel.com

drivers/gpu/drm/i915/display/intel_display.c

@@ -17191,7 +17191,7 @@ struct intel_display_error_state {
 		u32 vtotal;
 		u32 vblank;
 		u32 vsync;
-	} transcoder[4];
+	} transcoder[5];
 };
 
 struct intel_display_error_state *
@@ -17202,6 +17202,7 @@ intel_display_capture_error_state(struct drm_i915_private *dev_priv)
 		TRANSCODER_A,
 		TRANSCODER_B,
 		TRANSCODER_C,
+		TRANSCODER_D,
 		TRANSCODER_EDP,
 	};
 	int i;

drivers/gpu/drm/i915/display/intel_display.h

@@ -58,6 +58,7 @@ enum pipe {
 	PIPE_A = 0,
 	PIPE_B,
 	PIPE_C,
+	PIPE_D,
 	_PIPE_EDP,
 
 	I915_MAX_PIPES = _PIPE_EDP
@@ -75,6 +76,7 @@ enum transcoder {
 	TRANSCODER_A = PIPE_A,
 	TRANSCODER_B = PIPE_B,
 	TRANSCODER_C = PIPE_C,
+	TRANSCODER_D = PIPE_D,
 
 	/*
 	 * The following transcoders can map to any pipe, their enum value
@@ -98,6 +100,8 @@ static inline const char *transcoder_name(enum transcoder transcoder)
 		return "B";
 	case TRANSCODER_C:
 		return "C";
+	case TRANSCODER_D:
+		return "D";
 	case TRANSCODER_EDP:
 		return "EDP";
 	case TRANSCODER_DSI_A:

drivers/gpu/drm/i915/i915_reg.h

@@ -4217,6 +4217,7 @@ enum {
 #define TRANSCODER_B_OFFSET 0x61000
 #define TRANSCODER_C_OFFSET 0x62000
 #define CHV_TRANSCODER_C_OFFSET 0x63000
+#define TRANSCODER_D_OFFSET 0x63000
 #define TRANSCODER_EDP_OFFSET 0x6f000
 #define TRANSCODER_DSI0_OFFSET	0x6b000
 #define TRANSCODER_DSI1_OFFSET	0x6b800
@@ -5763,6 +5764,7 @@ enum {
 #define PIPE_A_OFFSET		0x70000
 #define PIPE_B_OFFSET		0x71000
 #define PIPE_C_OFFSET		0x72000
+#define PIPE_D_OFFSET		0x73000
 #define CHV_PIPE_C_OFFSET	0x74000
 /*
  * There's actually no pipe EDP. Some pipe registers have
@@ -9346,6 +9348,7 @@ enum skl_power_gate {
 #define _TRANS_DDI_FUNC_CTL_A		0x60400
 #define _TRANS_DDI_FUNC_CTL_B		0x61400
 #define _TRANS_DDI_FUNC_CTL_C		0x62400
+#define _TRANS_DDI_FUNC_CTL_D		0x63400
 #define _TRANS_DDI_FUNC_CTL_EDP		0x6F400
 #define _TRANS_DDI_FUNC_CTL_DSI0	0x6b400
 #define _TRANS_DDI_FUNC_CTL_DSI1	0x6bc00