[PATCH 27/47] drm/i915: convert DDI_FUNC_CTL to transcoder

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

Because there's one instance of the register per CPU transcoder and
not per CPU pipe. This is another register that appeared for the first
time on Haswell, and even though its Haswell name is
PIPE_DDI_FUNC_CTL, it will be renamed to TRANS_DDI_FUNC_CTL, so let's
just use the new naming scheme before it confuses more people.

Notice that there's a big improvement on intel_ddi_get_hw_state due to
the new TRANSCODER_EDP.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h      |   59 ++++++++++----------
 drivers/gpu/drm/i915/intel_ddi.c     |   98 +++++++++++++++++++++-------------
 drivers/gpu/drm/i915/intel_display.c |    8 +--
 drivers/gpu/drm/i915/intel_drv.h     |    4 +-
 4 files changed, 101 insertions(+), 68 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 1007f2d..13d67c1 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4387,34 +4387,39 @@
 #define HSW_PWR_WELL_CTL6			0x45414
 
 /* Per-pipe DDI Function Control */
-#define PIPE_DDI_FUNC_CTL_A		0x60400
-#define PIPE_DDI_FUNC_CTL_B		0x61400
-#define PIPE_DDI_FUNC_CTL_C		0x62400
-#define PIPE_DDI_FUNC_CTL_EDP		0x6F400
-#define DDI_FUNC_CTL(pipe) _PIPE(pipe, PIPE_DDI_FUNC_CTL_A, \
-				       PIPE_DDI_FUNC_CTL_B)
-#define  PIPE_DDI_FUNC_ENABLE		(1<<31)
+#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_EDP		0x6F400
+#define DDI_FUNC_CTL(tran) _TRANSCODER(tran, TRANS_DDI_FUNC_CTL_A, \
+					     TRANS_DDI_FUNC_CTL_B)
+#define  TRANS_DDI_FUNC_ENABLE		(1<<31)
 /* Those bits are ignored by pipe EDP since it can only connect to DDI A */
-#define  PIPE_DDI_PORT_MASK		(7<<28)
-#define  PIPE_DDI_SELECT_PORT(x)	((x)<<28)
-#define  PIPE_DDI_PORT_NONE		(0<<28)
-#define  PIPE_DDI_MODE_SELECT_MASK	(7<<24)
-#define  PIPE_DDI_MODE_SELECT_HDMI	(0<<24)
-#define  PIPE_DDI_MODE_SELECT_DVI	(1<<24)
-#define  PIPE_DDI_MODE_SELECT_DP_SST	(2<<24)
-#define  PIPE_DDI_MODE_SELECT_DP_MST	(3<<24)
-#define  PIPE_DDI_MODE_SELECT_FDI	(4<<24)
-#define  PIPE_DDI_BPC_MASK		(7<<20)
-#define  PIPE_DDI_BPC_8			(0<<20)
-#define  PIPE_DDI_BPC_10		(1<<20)
-#define  PIPE_DDI_BPC_6			(2<<20)
-#define  PIPE_DDI_BPC_12		(3<<20)
-#define  PIPE_DDI_PVSYNC		(1<<17)
-#define  PIPE_DDI_PHSYNC		(1<<16)
-#define  PIPE_DDI_BFI_ENABLE		(1<<4)
-#define  PIPE_DDI_PORT_WIDTH_X1		(0<<1)
-#define  PIPE_DDI_PORT_WIDTH_X2		(1<<1)
-#define  PIPE_DDI_PORT_WIDTH_X4		(3<<1)
+#define  TRANS_DDI_PORT_MASK		(7<<28)
+#define  TRANS_DDI_SELECT_PORT(x)	((x)<<28)
+#define  TRANS_DDI_PORT_NONE		(0<<28)
+#define  TRANS_DDI_MODE_SELECT_MASK	(7<<24)
+#define  TRANS_DDI_MODE_SELECT_HDMI	(0<<24)
+#define  TRANS_DDI_MODE_SELECT_DVI	(1<<24)
+#define  TRANS_DDI_MODE_SELECT_DP_SST	(2<<24)
+#define  TRANS_DDI_MODE_SELECT_DP_MST	(3<<24)
+#define  TRANS_DDI_MODE_SELECT_FDI	(4<<24)
+#define  TRANS_DDI_BPC_MASK		(7<<20)
+#define  TRANS_DDI_BPC_8		(0<<20)
+#define  TRANS_DDI_BPC_10		(1<<20)
+#define  TRANS_DDI_BPC_6		(2<<20)
+#define  TRANS_DDI_BPC_12		(3<<20)
+#define  TRANS_DDI_PVSYNC		(1<<17)
+#define  TRANS_DDI_PHSYNC		(1<<16)
+#define  TRANS_DDI_EDP_INPUT_MASK	(7<<12)
+#define  TRANS_DDI_EDP_INPUT_A_ON	(0<<12)
+#define  TRANS_DDI_EDP_INPUT_A_ONOFF	(4<<12)
+#define  TRANS_DDI_EDP_INPUT_B_ONOFF	(5<<12)
+#define  TRANS_DDI_EDP_INPUT_C_ONOFF	(6<<12)
+#define  TRANS_DDI_BFI_ENABLE		(1<<4)
+#define  TRANS_DDI_PORT_WIDTH_X1	(0<<1)
+#define  TRANS_DDI_PORT_WIDTH_X2	(1<<1)
+#define  TRANS_DDI_PORT_WIDTH_X4	(3<<1)
 
 /* DisplayPort Transport Control */
 #define DP_TP_CTL_A			0x64040
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 59d4999..26aae8f 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -923,65 +923,66 @@ void intel_ddi_enable_pipe_func(struct drm_crtc *crtc)
 	struct drm_encoder *encoder = &intel_encoder->base;
 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
 	enum pipe pipe = intel_crtc->pipe;
+	enum transcoder transcoder = intel_crtc->transcoder;
 	int type = intel_encoder->type;
 	uint32_t temp;
 
-	/* Enable PIPE_DDI_FUNC_CTL for the pipe to work in HDMI mode */
-	temp = PIPE_DDI_FUNC_ENABLE;
+	/* Enable TRANS_DDI_FUNC_CTL for the pipe to work in HDMI mode */
+	temp = TRANS_DDI_FUNC_ENABLE;
 
 	switch (intel_crtc->bpp) {
 	case 18:
-		temp |= PIPE_DDI_BPC_6;
+		temp |= TRANS_DDI_BPC_6;
 		break;
 	case 24:
-		temp |= PIPE_DDI_BPC_8;
+		temp |= TRANS_DDI_BPC_8;
 		break;
 	case 30:
-		temp |= PIPE_DDI_BPC_10;
+		temp |= TRANS_DDI_BPC_10;
 		break;
 	case 36:
-		temp |= PIPE_DDI_BPC_12;
+		temp |= TRANS_DDI_BPC_12;
 		break;
 	default:
-		WARN(1, "%d bpp unsupported by pipe DDI function\n",
+		WARN(1, "%d bpp unsupported by transcoder DDI function\n",
 		     intel_crtc->bpp);
 	}
 
 	if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
-		temp |= PIPE_DDI_PVSYNC;
+		temp |= TRANS_DDI_PVSYNC;
 	if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
-		temp |= PIPE_DDI_PHSYNC;
+		temp |= TRANS_DDI_PHSYNC;
 
 	if (type == INTEL_OUTPUT_HDMI) {
 		struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 
 		if (intel_hdmi->has_hdmi_sink)
-			temp |= PIPE_DDI_MODE_SELECT_HDMI;
+			temp |= TRANS_DDI_MODE_SELECT_HDMI;
 		else
-			temp |= PIPE_DDI_MODE_SELECT_DVI;
+			temp |= TRANS_DDI_MODE_SELECT_DVI;
 
-		temp |= PIPE_DDI_SELECT_PORT(intel_hdmi->ddi_port);
+		temp |= TRANS_DDI_SELECT_PORT(intel_hdmi->ddi_port);
 
 	} else if (type == INTEL_OUTPUT_ANALOG) {
-		temp |= PIPE_DDI_MODE_SELECT_FDI;
-		temp |= PIPE_DDI_SELECT_PORT(PORT_E);
+		temp |= TRANS_DDI_MODE_SELECT_FDI;
+		temp |= TRANS_DDI_SELECT_PORT(PORT_E);
 
 	} else if (type == INTEL_OUTPUT_DISPLAYPORT ||
 		   type == INTEL_OUTPUT_EDP) {
 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 
-		temp |= PIPE_DDI_MODE_SELECT_DP_SST;
-		temp |= PIPE_DDI_SELECT_PORT(intel_dp->port);
+		temp |= TRANS_DDI_MODE_SELECT_DP_SST;
+		temp |= TRANS_DDI_SELECT_PORT(intel_dp->port);
 
 		switch (intel_dp->lane_count) {
 		case 1:
-			temp |= PIPE_DDI_PORT_WIDTH_X1;
+			temp |= TRANS_DDI_PORT_WIDTH_X1;
 			break;
 		case 2:
-			temp |= PIPE_DDI_PORT_WIDTH_X2;
+			temp |= TRANS_DDI_PORT_WIDTH_X2;
 			break;
 		case 4:
-			temp |= PIPE_DDI_PORT_WIDTH_X4;
+			temp |= TRANS_DDI_PORT_WIDTH_X4;
 			break;
 		default:
 			WARN(1, "Unsupported lane count %d\n",
@@ -993,17 +994,17 @@ void intel_ddi_enable_pipe_func(struct drm_crtc *crtc)
 		     intel_encoder->type, pipe);
 	}
 
-	I915_WRITE(DDI_FUNC_CTL(pipe), temp);
+	I915_WRITE(DDI_FUNC_CTL(transcoder), temp);
 }
 
-void intel_ddi_disable_pipe_func(struct drm_i915_private *dev_priv,
-				 enum pipe pipe)
+void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
+				       enum transcoder transcoder)
 {
-	uint32_t reg = DDI_FUNC_CTL(pipe);
+	uint32_t reg = DDI_FUNC_CTL(transcoder);
 	uint32_t val = I915_READ(reg);
 
-	val &= ~(PIPE_DDI_FUNC_ENABLE | PIPE_DDI_PORT_MASK);
-	val |= PIPE_DDI_PORT_NONE;
+	val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK);
+	val |= TRANS_DDI_PORT_NONE;
 	I915_WRITE(reg, val);
 }
 
@@ -1021,13 +1022,32 @@ bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
 	if (!(tmp & DDI_BUF_CTL_ENABLE))
 		return false;
 
-	for_each_pipe(i) {
-		tmp = I915_READ(DDI_FUNC_CTL(i));
+	if (port == PORT_A) {
+		tmp = I915_READ(DDI_FUNC_CTL(TRANSCODER_EDP));
 
-		if ((tmp & PIPE_DDI_PORT_MASK)
-		    == PIPE_DDI_SELECT_PORT(port)) {
-			*pipe = i;
-			return true;
+		switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
+		case TRANS_DDI_EDP_INPUT_A_ON:
+		case TRANS_DDI_EDP_INPUT_A_ONOFF:
+			*pipe = PIPE_A;
+			break;
+		case TRANS_DDI_EDP_INPUT_B_ONOFF:
+			*pipe = PIPE_B;
+			break;
+		case TRANS_DDI_EDP_INPUT_C_ONOFF:
+			*pipe = PIPE_C;
+			break;
+		}
+
+		return true;
+	} else {
+		for (i = TRANSCODER_A; i <= TRANSCODER_C; i++) {
+			tmp = I915_READ(DDI_FUNC_CTL(i));
+
+			if ((tmp & TRANS_DDI_PORT_MASK)
+			    == TRANS_DDI_SELECT_PORT(port)) {
+				*pipe = i;
+				return true;
+			}
 		}
 	}
 
@@ -1041,13 +1061,19 @@ static uint32_t intel_ddi_get_crtc_pll(struct drm_i915_private *dev_priv,
 {
 	uint32_t temp, ret;
 	enum port port;
+	enum transcoder transcoder = pipe_to_transcoder(dev_priv, pipe);
 	int i;
 
-	temp = I915_READ(DDI_FUNC_CTL(pipe));
-	temp &= PIPE_DDI_PORT_MASK;
-	for (i = PORT_A; i <= PORT_E; i++)
-		if (temp == PIPE_DDI_SELECT_PORT(i))
-			port = i;
+	if (transcoder == TRANSCODER_EDP) {
+		port = PORT_A;
+	} else {
+		temp = I915_READ(DDI_FUNC_CTL(transcoder));
+		temp &= TRANS_DDI_PORT_MASK;
+
+		for (i = PORT_B; i <= PORT_E; i++)
+			if (temp == TRANS_DDI_SELECT_PORT(i))
+				port = i;
+	}
 
 	ret = I915_READ(PORT_CLK_SEL(port));
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0fccbe6..1f853f6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1112,12 +1112,13 @@ static void assert_fdi_tx(struct drm_i915_private *dev_priv,
 	int reg;
 	u32 val;
 	bool cur_state;
+	enum transcoder transcoder = pipe_to_transcoder(dev_priv, pipe);
 
 	if (IS_HASWELL(dev_priv->dev)) {
 		/* On Haswell, DDI is used instead of FDI_TX_CTL */
-		reg = DDI_FUNC_CTL(pipe);
+		reg = DDI_FUNC_CTL(transcoder);
 		val = I915_READ(reg);
-		cur_state = !!(val & PIPE_DDI_FUNC_ENABLE);
+		cur_state = !!(val & TRANS_DDI_FUNC_ENABLE);
 	} else {
 		reg = FDI_TX_CTL(pipe);
 		val = I915_READ(reg);
@@ -3259,6 +3260,7 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
 	struct intel_encoder *encoder;
 	int pipe = intel_crtc->pipe;
 	int plane = intel_crtc->plane;
+	enum transcoder transcoder = intel_crtc->transcoder;
 	u32 reg, temp;
 
 
@@ -3280,7 +3282,7 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc)
 	intel_disable_pipe(dev_priv, pipe);
 
 	if (IS_HASWELL(dev))
-		intel_ddi_disable_pipe_func(dev_priv, pipe);
+		intel_ddi_disable_transcoder_func(dev_priv, transcoder);
 
 	/* Disable PF */
 	I915_WRITE(PF_CTL(pipe), 0);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index ca06ebb..4afbf05 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -595,8 +595,8 @@ extern void intel_ddi_mode_set(struct drm_encoder *encoder,
 				struct drm_display_mode *adjusted_mode);
 extern void intel_ddi_pll_init(struct drm_device *dev);
 extern void intel_ddi_enable_pipe_func(struct drm_crtc *crtc);
-extern void intel_ddi_disable_pipe_func(struct drm_i915_private *dev_priv,
-					enum pipe pipe);
+extern void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
+					      enum transcoder transcoder);
 extern void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc);
 extern void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc);
 extern void intel_ddi_setup_hw_pll_state(struct drm_device *dev);
-- 
1.7.10.4