drm/i915: explicitly disable the DIPs we're not using

From this point on, the 'set_infoframe' functions always set the DIP
registers to a known state, so anything done will always be undone at
the modeset.
Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_reg.h

@@ -1717,8 +1717,10 @@
 #define   VIDEO_DIP_PORT_C		(2 << 29)
 #define   VIDEO_DIP_PORT_D		(3 << 29)
 #define   VIDEO_DIP_PORT_MASK		(3 << 29)
+#define   VIDEO_DIP_ENABLE_GCP		(1 << 25)
 #define   VIDEO_DIP_ENABLE_AVI		(1 << 21)
 #define   VIDEO_DIP_ENABLE_VENDOR	(2 << 21)
+#define   VIDEO_DIP_ENABLE_GAMUT	(4 << 21)
 #define   VIDEO_DIP_ENABLE_SPD		(8 << 21)
 #define   VIDEO_DIP_SELECT_AVI		(0 << 19)
 #define   VIDEO_DIP_SELECT_VENDOR	(1 << 19)
@@ -1729,7 +1731,11 @@
 #define   VIDEO_DIP_FREQ_2VSYNC		(2 << 16)
 #define   VIDEO_DIP_FREQ_MASK		(3 << 16)
 /* HSW and later: */
+#define   VIDEO_DIP_ENABLE_VSC_HSW	(1 << 20)
+#define   VIDEO_DIP_ENABLE_GCP_HSW	(1 << 16)
 #define   VIDEO_DIP_ENABLE_AVI_HSW	(1 << 12)
+#define   VIDEO_DIP_ENABLE_VS_HSW	(1 << 8)
+#define   VIDEO_DIP_ENABLE_GMP_HSW	(1 << 4)
 #define   VIDEO_DIP_ENABLE_SPD_HSW	(1 << 0)
 
 /* Panel power sequencing */

drivers/gpu/drm/i915/intel_hdmi.c

@@ -350,6 +350,7 @@ static void g4x_set_infoframes(struct drm_encoder *encoder,
 	}
 
 	val |= VIDEO_DIP_ENABLE;
+	val &= ~VIDEO_DIP_ENABLE_VENDOR;
 
 	I915_WRITE(reg, val);
 
@@ -393,6 +394,8 @@ static void ibx_set_infoframes(struct drm_encoder *encoder,
 	}
 
 	val |= VIDEO_DIP_ENABLE;
+	val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
+		 VIDEO_DIP_ENABLE_GCP);
 
 	I915_WRITE(reg, val);
 
@@ -422,6 +425,8 @@ static void cpt_set_infoframes(struct drm_encoder *encoder,
 
 	/* Set both together, unset both together: see the spec. */
 	val |= VIDEO_DIP_ENABLE | VIDEO_DIP_ENABLE_AVI;
+	val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
+		 VIDEO_DIP_ENABLE_GCP);
 
 	I915_WRITE(reg, val);
 
@@ -450,6 +455,8 @@ static void vlv_set_infoframes(struct drm_encoder *encoder,
 	}
 
 	val |= VIDEO_DIP_ENABLE;
+	val &= ~(VIDEO_DIP_ENABLE_VENDOR | VIDEO_DIP_ENABLE_GAMUT |
+		 VIDEO_DIP_ENABLE_GCP);
 
 	I915_WRITE(reg, val);
 
@@ -464,12 +471,18 @@ static void hsw_set_infoframes(struct drm_encoder *encoder,
 	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 	u32 reg = HSW_TVIDEO_DIP_CTL(intel_crtc->pipe);
+	u32 val = I915_READ(reg);
 
 	if (!intel_hdmi->has_hdmi_sink) {
 		I915_WRITE(reg, 0);
 		return;
 	}
 
+	val &= ~(VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_GCP_HSW |
+		 VIDEO_DIP_ENABLE_VS_HSW | VIDEO_DIP_ENABLE_GMP_HSW);
+
+	I915_WRITE(reg, val);
+
 	intel_hdmi_set_avi_infoframe(encoder, adjusted_mode);
 	intel_hdmi_set_spd_infoframe(encoder);
 }