drm/i915: split conversion function out into separate function

for MST I need to reuse this, so just move it now.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 18 insertions, 13 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 008bb3dc88cb..421ea71b2e58 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4300,6 +4300,23 @@ static void i9xx_pfit_enable(struct intel_crtc *crtc)
         I915_WRITE(BCLRPAT(crtc->pipe), 0);
 }
 
+static enum intel_display_power_domain port_to_power_domain(enum port port)
+{
+        switch (port) {
+        case PORT_A:
+                return POWER_DOMAIN_PORT_DDI_A_4_LANES;
+        case PORT_B:
+                return POWER_DOMAIN_PORT_DDI_B_4_LANES;
+        case PORT_C:
+                return POWER_DOMAIN_PORT_DDI_C_4_LANES;
+        case PORT_D:
+                return POWER_DOMAIN_PORT_DDI_D_4_LANES;
+        default:
+                WARN_ON_ONCE(1);
+                return POWER_DOMAIN_PORT_OTHER;
+        }
+}
+
 #define for_each_power_domain(domain, mask)                             \
         for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++)     \
                 if ((1 << (domain)) & (mask))
@@ -4318,19 +4335,7 @@ intel_display_port_power_domain(struct intel_encoder *intel_encoder)
         case INTEL_OUTPUT_HDMI:
         case INTEL_OUTPUT_EDP:
                 intel_dig_port = enc_to_dig_port(&intel_encoder->base);
-                switch (intel_dig_port->port) {
-                case PORT_A:
-                        return POWER_DOMAIN_PORT_DDI_A_4_LANES;
-                case PORT_B:
-                        return POWER_DOMAIN_PORT_DDI_B_4_LANES;
-                case PORT_C:
-                        return POWER_DOMAIN_PORT_DDI_C_4_LANES;
-                case PORT_D:
-                        return POWER_DOMAIN_PORT_DDI_D_4_LANES;
-                default:
-                        WARN_ON_ONCE(1);
-                        return POWER_DOMAIN_PORT_OTHER;
-                }
+                return port_to_power_domain(intel_dig_port->port);
         case INTEL_OUTPUT_ANALOG:
                 return POWER_DOMAIN_PORT_CRT;
         case INTEL_OUTPUT_DSI: