From 6b8506d575e3d7a064a526202007929429c28f9e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Tue, 10 Oct 2017 15:12:00 +0300
Subject: [PATCH] drm/i915: Extract intel_ddi_clk_disable()
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Git-commit: 6b8506d575e3d7a064a526202007929429c28f9e
Patch-mainline: v4.15-rc1
References: FATE#322643 bsc#1055900

Pull the code to disable the port clock into a function. We already have
the intel_ddi_clk_select() counterpart.

V2: Keep using intel_ddi_get_encoder_port() for now (Chris)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171010121207.570-3-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/intel_ddi.c |   24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2140,6 +2140,21 @@ static void intel_ddi_clk_select(struct
 	}
 }
 
+static void intel_ddi_clk_disable(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	enum port port = intel_ddi_get_encoder_port(encoder);
+
+	if (IS_CANNONLAKE(dev_priv))
+		I915_WRITE(DPCLKA_CFGCR0, I915_READ(DPCLKA_CFGCR0) |
+			   DPCLKA_CFGCR0_DDI_CLK_OFF(port));
+	else if (IS_GEN9_BC(dev_priv))
+		I915_WRITE(DPLL_CTRL2, I915_READ(DPLL_CTRL2) |
+			   DPLL_CTRL2_DDI_CLK_OFF(port));
+	else if (INTEL_GEN(dev_priv) < 9)
+		I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
+}
+
 static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
 				    int link_rate, uint32_t lane_count,
 				    struct intel_shared_dpll *pll,
@@ -2300,14 +2315,7 @@ static void intel_ddi_post_disable(struc
 	if (dig_port)
 		intel_display_power_put(dev_priv, dig_port->ddi_io_power_domain);
 
-	if (IS_CANNONLAKE(dev_priv))
-		I915_WRITE(DPCLKA_CFGCR0, I915_READ(DPCLKA_CFGCR0) |
-			   DPCLKA_CFGCR0_DDI_CLK_OFF(port));
-	else if (IS_GEN9_BC(dev_priv))
-		I915_WRITE(DPLL_CTRL2, (I915_READ(DPLL_CTRL2) |
-					DPLL_CTRL2_DDI_CLK_OFF(port)));
-	else if (INTEL_GEN(dev_priv) < 9)
-		I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
+	intel_ddi_clk_disable(intel_encoder);
 
 	if (type == INTEL_OUTPUT_HDMI) {
 		struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);