drm/i915: move set_pll_edp to intel_dp.c

Now that we enable the cpu edp pll in intel_dp->pre_enable and no
longer in crtc_mode_set, we can also move the modeset part to the
intel_dp->mode_set callback. Previously this was not possible because
the encoder ->mode_set callbacks are called after the crtc mode set
callback.

v2: Rebase on top of copy&pasted hsw crtc_mode_set.
Reviewed-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -2294,43 +2294,6 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
 	return 0;
 }
 
-static void ironlake_set_pll_edp(struct drm_crtc *crtc, int clock)
-{
-	struct drm_device *dev = crtc->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 dpa_ctl;
-
-	DRM_DEBUG_KMS("eDP PLL enable for clock %d\n", clock);
-	dpa_ctl = I915_READ(DP_A);
-	dpa_ctl &= ~DP_PLL_FREQ_MASK;
-
-	if (clock < 200000) {
-		u32 temp;
-		dpa_ctl |= DP_PLL_FREQ_160MHZ;
-		/* workaround for 160Mhz:
-		   1) program 0x4600c bits 15:0 = 0x8124
-		   2) program 0x46010 bit 0 = 1
-		   3) program 0x46034 bit 24 = 1
-		   4) program 0x64000 bit 14 = 1
-		   */
-		temp = I915_READ(0x4600c);
-		temp &= 0xffff0000;
-		I915_WRITE(0x4600c, temp | 0x8124);
-
-		temp = I915_READ(0x46010);
-		I915_WRITE(0x46010, temp | 1);
-
-		temp = I915_READ(0x46034);
-		I915_WRITE(0x46034, temp | (1 << 24));
-	} else {
-		dpa_ctl |= DP_PLL_FREQ_270MHZ;
-	}
-	I915_WRITE(DP_A, dpa_ctl);
-
-	POSTING_READ(DP_A);
-	udelay(500);
-}
-
 static void intel_fdi_normal_train(struct drm_crtc *crtc)
 {
 	struct drm_device *dev = crtc->dev;
@@ -5429,9 +5392,6 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
 
 	fdi_config_ok = ironlake_check_fdi_lanes(intel_crtc);
 
-	if (is_cpu_edp)
-		ironlake_set_pll_edp(crtc, adjusted_mode->clock);
-
 	ironlake_set_pipeconf(crtc, adjusted_mode, dither);
 
 	intel_wait_for_vblank(dev, pipe);

drivers/gpu/drm/i915/intel_dp.c

@@ -899,6 +899,43 @@ void intel_dp_init_link_config(struct intel_dp *intel_dp)
 	}
 }
 
+static void ironlake_set_pll_edp(struct drm_crtc *crtc, int clock)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32 dpa_ctl;
+
+	DRM_DEBUG_KMS("eDP PLL enable for clock %d\n", clock);
+	dpa_ctl = I915_READ(DP_A);
+	dpa_ctl &= ~DP_PLL_FREQ_MASK;
+
+	if (clock < 200000) {
+		u32 temp;
+		dpa_ctl |= DP_PLL_FREQ_160MHZ;
+		/* workaround for 160Mhz:
+		   1) program 0x4600c bits 15:0 = 0x8124
+		   2) program 0x46010 bit 0 = 1
+		   3) program 0x46034 bit 24 = 1
+		   4) program 0x64000 bit 14 = 1
+		   */
+		temp = I915_READ(0x4600c);
+		temp &= 0xffff0000;
+		I915_WRITE(0x4600c, temp | 0x8124);
+
+		temp = I915_READ(0x46010);
+		I915_WRITE(0x46010, temp | 1);
+
+		temp = I915_READ(0x46034);
+		I915_WRITE(0x46034, temp | (1 << 24));
+	} else {
+		dpa_ctl |= DP_PLL_FREQ_270MHZ;
+	}
+	I915_WRITE(DP_A, dpa_ctl);
+
+	POSTING_READ(DP_A);
+	udelay(500);
+}
+
 static void
 intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 		  struct drm_display_mode *adjusted_mode)
@@ -998,6 +1035,9 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 	} else {
 		intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
 	}
+
+	if (is_cpu_edp(intel_dp))
+		ironlake_set_pll_edp(crtc, adjusted_mode->clock);
 }
 
 #define IDLE_ON_MASK		(PP_ON | 0 	  | PP_SEQUENCE_MASK | 0                     | PP_SEQUENCE_STATE_MASK)