drm/i915/icl: create function to identify combophy port

This patch creates a function/wrapper to check if port is combophy port
instead of explicitly comparing ports.

Changes since V1:
 - keep all intel_port_is_* helper together (Lucas)

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: Madhav Chauhan <madhav.chauhan@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181004085043.10154-1-mahesh1.kumar@intel.com
(cherry picked from commit 176597a12d61709727d1639836e5d68a6e7c437b)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

3 files changed, 20 insertions, 7 deletions

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index b6910c8b4e08..aeb7d337f2dc 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -916,7 +916,7 @@ static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port por
         level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;
 
         if (IS_ICELAKE(dev_priv)) {
-                if (port == PORT_A || port == PORT_B)
+                if (intel_port_is_combophy(dev_priv, port))
                         icl_get_combo_buf_trans(dev_priv, port,
                                                 INTEL_OUTPUT_HDMI, &n_entries);
                 else
@@ -1535,7 +1535,7 @@ static void icl_ddi_clock_get(struct intel_encoder *encoder,
         uint32_t pll_id;
 
         pll_id = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);
-        if (port == PORT_A || port == PORT_B) {
+        if (intel_port_is_combophy(dev_priv, port)) {
                 if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_HDMI))
                         link_clock = cnl_calc_wrpll_link(dev_priv, pll_id);
                 else
@@ -2235,7 +2235,7 @@ u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder)
         int n_entries;
 
         if (IS_ICELAKE(dev_priv)) {
-                if (port == PORT_A || port == PORT_B)
+                if (intel_port_is_combophy(dev_priv, port))
                         icl_get_combo_buf_trans(dev_priv, port, encoder->type,
                                                 &n_entries);
                 else
@@ -2669,9 +2669,10 @@ static void icl_ddi_vswing_sequence(struct intel_encoder *encoder,
                                     u32 level,
                                     enum intel_output_type type)
 {
+        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
         enum port port = encoder->port;
 
-        if (port == PORT_A || port == PORT_B)
+        if (intel_port_is_combophy(dev_priv, port))
                 icl_combo_phy_ddi_vswing_sequence(encoder, level, type);
         else
                 icl_mg_phy_ddi_vswing_sequence(encoder, link_clock, level);
@@ -2757,7 +2758,7 @@ void icl_map_plls_to_ports(struct drm_crtc *crtc,
                 val = I915_READ(DPCLKA_CFGCR0_ICL);
                 WARN_ON((val & DPCLKA_CFGCR0_DDI_CLK_OFF(port)) == 0);
 
-                if (port == PORT_A || port == PORT_B) {
+                if (intel_port_is_combophy(dev_priv, port)) {
                         val &= ~DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
                         val |= DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, port);
                         I915_WRITE(DPCLKA_CFGCR0_ICL, val);
@@ -2810,7 +2811,7 @@ static void intel_ddi_clk_select(struct intel_encoder *encoder,
         mutex_lock(&dev_priv->dpll_lock);
 
         if (IS_ICELAKE(dev_priv)) {
-                if (port >= PORT_C)
+                if (!intel_port_is_combophy(dev_priv, port))
                         I915_WRITE(DDI_CLK_SEL(port),
                                    icl_pll_to_ddi_pll_sel(encoder, pll));
         } else if (IS_CANNONLAKE(dev_priv)) {
@@ -2852,7 +2853,7 @@ static void intel_ddi_clk_disable(struct intel_encoder *encoder)
         enum port port = encoder->port;
 
         if (IS_ICELAKE(dev_priv)) {
-                if (port >= PORT_C)
+                if (!intel_port_is_combophy(dev_priv, port))
                         I915_WRITE(DDI_CLK_SEL(port), DDI_CLK_SEL_NONE);
         } else if (IS_CANNONLAKE(dev_priv)) {
                 I915_WRITE(DPCLKA_CFGCR0, I915_READ(DPCLKA_CFGCR0) |
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3cd813c21af1..9741cc419e1b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5961,6 +5961,17 @@ static void i9xx_pfit_enable(struct intel_crtc *crtc)
         I915_WRITE(BCLRPAT(crtc->pipe), 0);
 }
 
+bool intel_port_is_combophy(struct drm_i915_private *dev_priv, enum port port)
+{
+        if (port == PORT_NONE)
+                return false;
+
+        if (IS_ICELAKE(dev_priv))
+                return port <= PORT_B;
+
+        return false;
+}
+
 bool intel_port_is_tc(struct drm_i915_private *dev_priv, enum port port)
 {
         if (IS_ICELAKE(dev_priv))
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a34c2f1f9159..f8dc84b2d2d3 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1517,6 +1517,7 @@ void intel_connector_attach_encoder(struct intel_connector *connector,
                                     struct intel_encoder *encoder);
 struct drm_display_mode *
 intel_encoder_current_mode(struct intel_encoder *encoder);
+bool intel_port_is_combophy(struct drm_i915_private *dev_priv, enum port port);
 bool intel_port_is_tc(struct drm_i915_private *dev_priv, enum port port);
 enum tc_port intel_port_to_tc(struct drm_i915_private *dev_priv,
                               enum port port);