[PATCH 08/11] drm/i915: split some conversion functions out into separate functions.

[Dave Airlie <airlied@gmail.com>]

From: Dave Airlie <airlied@redhat.com>

for MST I need to reuse these, so split them out early.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/i915/intel_ddi.c     | 27 ++++++++++++++++-----------
 drivers/gpu/drm/i915/intel_display.c | 31 ++++++++++++++++++-------------
 2 files changed, 34 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index aeb398b..2733a3d 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -752,6 +752,20 @@ intel_ddi_calculate_wrpll(int clock /* in Hz */,
 	*r2_out = best.r2;
 }
 
+static int link_bw_to_pll_sel(int link_bw)
+{
+	switch (link_bw) {
+	case DP_LINK_BW_1_62:
+		return PORT_CLK_SEL_LCPLL_810;
+	case DP_LINK_BW_2_7:
+		return PORT_CLK_SEL_LCPLL_1350;
+	case DP_LINK_BW_5_4:
+		return PORT_CLK_SEL_LCPLL_2700;
+	default:
+		return -1;
+	}
+}
+
 /*
  * Tries to find a PLL for the CRTC. If it finds, it increases the refcount and
  * stores it in intel_crtc->ddi_pll_sel, so other mode sets won't be able to
@@ -774,17 +788,8 @@ bool intel_ddi_pll_select(struct intel_crtc *intel_crtc)
 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 
-		switch (intel_dp->link_bw) {
-		case DP_LINK_BW_1_62:
-			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_810;
-			break;
-		case DP_LINK_BW_2_7:
-			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_1350;
-			break;
-		case DP_LINK_BW_5_4:
-			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_2700;
-			break;
-		default:
+		intel_crtc->ddi_pll_sel = link_bw_to_pll_sel(intel_dp->link_bw);
+		if (intel_crtc->ddi_pll_sel == -1) {
 			DRM_ERROR("Link bandwidth %d unsupported\n",
 				  intel_dp->link_bw);
 			return false;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 425e9b4..cef64b8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4280,6 +4280,23 @@ 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))
@@ -4298,19 +4315,7 @@ 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:
-- 
1.9.3