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>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 008bb3d..421ea71 100644 (file)
--- 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: