[Intel-gfx] [PATCH v2 2/3] drm/i915: add vlv_pipe_to_phy() helper to replace DPIO_PHY()

[Jani Nikula]

Add a helper with better typing and handing for bogus input, and better
in line with vlv_dig_port_to_channel(), vlv_dig_port_to_phy(), and
vlv_pipe_to_channel().

Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dpio_phy.c | 14 ++++++++++++++
 drivers/gpu/drm/i915/display/intel_dpio_phy.h |  5 +++++
 drivers/gpu/drm/i915/display/intel_pps.c      |  2 +-
 drivers/gpu/drm/i915/i915_reg.h               |  2 --
 drivers/gpu/drm/i915/vlv_sideband.c           |  6 ++++--
 5 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dpio_phy.c 
b/drivers/gpu/drm/i915/display/intel_dpio_phy.c
index 62b93d097e44..d6af46e33424 100644
--- a/drivers/gpu/drm/i915/display/intel_dpio_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_dpio_phy.c
@@ -666,6 +666,20 @@ enum dpio_phy vlv_dig_port_to_phy(struct 
intel_digital_port *dig_port)
        }
 }
 
+enum dpio_phy vlv_pipe_to_phy(enum pipe pipe)
+{
+       switch (pipe) {
+       default:
+               MISSING_CASE(pipe);
+               fallthrough;
+       case PIPE_A:
+       case PIPE_B:
+               return DPIO_PHY0;
+       case PIPE_C:
+               return DPIO_PHY1;
+       }
+}
+
 enum dpio_channel vlv_pipe_to_channel(enum pipe pipe)
 {
        switch (pipe) {
diff --git a/drivers/gpu/drm/i915/display/intel_dpio_phy.h 
b/drivers/gpu/drm/i915/display/intel_dpio_phy.h
index 4d43dbbdf81c..9adc4e8c1738 100644
--- a/drivers/gpu/drm/i915/display/intel_dpio_phy.h
+++ b/drivers/gpu/drm/i915/display/intel_dpio_phy.h
@@ -44,6 +44,7 @@ u8 bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder 
*encoder);
 
 enum dpio_channel vlv_dig_port_to_channel(struct intel_digital_port *dig_port);
 enum dpio_phy vlv_dig_port_to_phy(struct intel_digital_port *dig_port);
+enum dpio_phy vlv_pipe_to_phy(enum pipe pipe);
 enum dpio_channel vlv_pipe_to_channel(enum pipe pipe);
 
 void chv_set_phy_signal_level(struct intel_encoder *encoder,
@@ -116,6 +117,10 @@ static inline enum dpio_phy vlv_dig_port_to_phy(struct 
intel_digital_port *dig_p
 {
        return DPIO_PHY0;
 }
+static inline enum dpio_phy vlv_pipe_to_phy(enum pipe pipe)
+{
+       return DPIO_PHY0;
+}
 static inline enum dpio_channel vlv_pipe_to_channel(enum pipe pipe)
 {
        return DPIO_CH0;
diff --git a/drivers/gpu/drm/i915/display/intel_pps.c 
b/drivers/gpu/drm/i915/display/intel_pps.c
index 73f0f1714b37..a8fa3a20990e 100644
--- a/drivers/gpu/drm/i915/display/intel_pps.c
+++ b/drivers/gpu/drm/i915/display/intel_pps.c
@@ -90,7 +90,7 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp)
        struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
        enum pipe pipe = intel_dp->pps.pps_pipe;
        bool pll_enabled, release_cl_override = false;
-       enum dpio_phy phy = DPIO_PHY(pipe);
+       enum dpio_phy phy = vlv_pipe_to_phy(pipe);
        enum dpio_channel ch = vlv_pipe_to_channel(pipe);
        u32 DP;
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 135e8d8dbdf0..27dc903f0553 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -195,8 +195,6 @@
 #define  DPIO_SFR_BYPASS               (1 << 1)
 #define  DPIO_CMNRST                   (1 << 0)
 
-#define DPIO_PHY(pipe)                 ((pipe) >> 1)
-
 /*
  * Per pipe/PLL DPIO regs
  */
diff --git a/drivers/gpu/drm/i915/vlv_sideband.c 
b/drivers/gpu/drm/i915/vlv_sideband.c
index b98dec3ad817..f7df55217845 100644
--- a/drivers/gpu/drm/i915/vlv_sideband.c
+++ b/drivers/gpu/drm/i915/vlv_sideband.c
@@ -229,7 +229,8 @@ static u32 vlv_dpio_phy_iosf_port(struct drm_i915_private 
*i915, enum dpio_phy p
 
 u32 vlv_dpio_read(struct drm_i915_private *i915, enum pipe pipe, int reg)
 {
-       u32 port = vlv_dpio_phy_iosf_port(i915, DPIO_PHY(pipe));
+       enum dpio_phy phy = vlv_pipe_to_phy(pipe);
+       u32 port = vlv_dpio_phy_iosf_port(i915, phy);
        u32 val = 0;
 
        vlv_sideband_rw(i915, DPIO_DEVFN, port, SB_MRD_NP, reg, &val);
@@ -248,7 +249,8 @@ u32 vlv_dpio_read(struct drm_i915_private *i915, enum pipe 
pipe, int reg)
 void vlv_dpio_write(struct drm_i915_private *i915,
                    enum pipe pipe, int reg, u32 val)
 {
-       u32 port = vlv_dpio_phy_iosf_port(i915, DPIO_PHY(pipe));
+       enum dpio_phy phy = vlv_pipe_to_phy(pipe);
+       u32 port = vlv_dpio_phy_iosf_port(i915, phy);
 
        vlv_sideband_rw(i915, DPIO_DEVFN, port, SB_MWR_NP, reg, &val);
 }
-- 
2.39.2