drm/i915/vlv: Make the vlv_dpio_read/vlv_dpio_write more PHY centric

vlv_dpio_read/write should be describe more in PHY centric instead of
display controller centric.
Create a enum dpio_channel for channel index and enum dpio_phy for PHY
index.  This should better to gather for upcoming platform.

v2: Rebase the code based on
drm/i915/vlv: Fix typo in the DPIO register define.

v3: Rename vlv_phy to dpio_phy_iosf_port and define additional macro
DPIO_PHY, and remove unrelated change. (Ville)

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chon Ming Lee <chon.ming.lee@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

7 files changed, 42 insertions, 26 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index efca30dc6c57..c546316ac649 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -88,6 +88,18 @@ enum port {
 };
 #define port_name(p) ((p) + 'A')
 
+#define I915_NUM_PHYS_VLV 1
+
+enum dpio_channel {
+        DPIO_CH0,
+        DPIO_CH1
+};
+
+enum dpio_phy {
+        DPIO_PHY0,
+        DPIO_PHY1
+};
+
 enum intel_display_power_domain {
         POWER_DOMAIN_PIPE_A,
         POWER_DOMAIN_PIPE_B,
@@ -1403,6 +1415,7 @@ typedef struct drm_i915_private {
         int num_shared_dpll;
         struct intel_shared_dpll shared_dplls[I915_NUM_PLLS];
         struct intel_ddi_plls ddi_plls;
+        int dpio_phy_iosf_port[I915_NUM_PHYS_VLV];
 
         /* Reclocking support */
         bool render_reclock_avail;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 29265638bf56..a8a5bcb521c7 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -452,6 +452,9 @@
 #define  DPIO_SFR_BYPASS                (1<<1)
 #define  DPIO_CMNRST                    (1<<0)
 
+#define DPIO_PHY(pipe)                  ((pipe) >> 1)
+#define DPIO_PHY_IOSF_PORT(phy)         (dev_priv->dpio_phy_iosf_port[phy])
+
 /*
  * Per pipe/PLL DPIO regs
  */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index abf509ce5e26..752d83019f36 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1361,6 +1361,7 @@ static void intel_init_dpio(struct drm_device *dev)
         if (!IS_VALLEYVIEW(dev))
                 return;
 
+        DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO;
         /*
          * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
          *  6.  De-assert cmn_reset/side_reset. Same as VLV X0.
@@ -1494,18 +1495,25 @@ static void vlv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
         POSTING_READ(DPLL(pipe));
 }
 
-void vlv_wait_port_ready(struct drm_i915_private *dev_priv, int port)
+void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
+                struct intel_digital_port *dport)
 {
         u32 port_mask;
 
-        if (!port)
+        switch (dport->port) {
+        case PORT_B:
                 port_mask = DPLL_PORTB_READY_MASK;
-        else
+                break;
+        case PORT_C:
                 port_mask = DPLL_PORTC_READY_MASK;
+                break;
+        default:
+                BUG();
+        }
 
         if (wait_for((I915_READ(DPLL(0)) & port_mask) == 0, 1000))
                 WARN(1, "timed out waiting for port %c ready: 0x%08x\n",
-                     'B' + port, I915_READ(DPLL(0)));
+                     'B' + dport->port, I915_READ(DPLL(0)));
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 2584eb4bbf0b..34d605762a60 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1839,7 +1839,7 @@ static void vlv_pre_enable_dp(struct intel_encoder *encoder)
         struct drm_device *dev = encoder->base.dev;
         struct drm_i915_private *dev_priv = dev->dev_private;
         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
-        int port = vlv_dport_to_channel(dport);
+        enum dpio_channel port = vlv_dport_to_channel(dport);
         int pipe = intel_crtc->pipe;
         struct edp_power_seq power_seq;
         u32 val;
@@ -1866,7 +1866,7 @@ static void vlv_pre_enable_dp(struct intel_encoder *encoder)
 
         intel_enable_dp(encoder);
 
-        vlv_wait_port_ready(dev_priv, port);
+        vlv_wait_port_ready(dev_priv, dport);
 }
 
 static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
@@ -1876,7 +1876,7 @@ static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
         struct drm_i915_private *dev_priv = dev->dev_private;
         struct intel_crtc *intel_crtc =
                 to_intel_crtc(encoder->base.crtc);
-        int port = vlv_dport_to_channel(dport);
+        enum dpio_channel port = vlv_dport_to_channel(dport);
         int pipe = intel_crtc->pipe;
 
         /* Program Tx lane resets to default */
@@ -2033,7 +2033,7 @@ static uint32_t intel_vlv_signal_levels(struct intel_dp *intel_dp)
         unsigned long demph_reg_value, preemph_reg_value,
                 uniqtranscale_reg_value;
         uint8_t train_set = intel_dp->train_set[0];
-        int port = vlv_dport_to_channel(dport);
+        enum dpio_channel port = vlv_dport_to_channel(dport);
         int pipe = intel_crtc->pipe;
 
         switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 6d701e79b611..9134a5464dd5 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -490,9 +490,9 @@ vlv_dport_to_channel(struct intel_digital_port *dport)
 {
         switch (dport->port) {
         case PORT_B:
-                return 0;
+                return DPIO_CH0;
         case PORT_C:
-                return 1;
+                return DPIO_CH1;
         default:
                 BUG();
         }
@@ -637,7 +637,8 @@ enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
 void intel_wait_for_vblank(struct drm_device *dev, int pipe);
 void intel_wait_for_pipe_off(struct drm_device *dev, int pipe);
 int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp);
-void vlv_wait_port_ready(struct drm_i915_private *dev_priv, int port);
+void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
+                         struct intel_digital_port *dport);
 bool intel_get_load_detect_pipe(struct drm_connector *connector,
                                 struct drm_display_mode *mode,
                                 struct intel_load_detect_pipe *old);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 5b9143fc9b5a..61cff670ff3f 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1081,7 +1081,7 @@ static void vlv_hdmi_pre_enable(struct intel_encoder *encoder)