[Intel-gfx] [PATCH v2 1/5] drm/i915: Add whether or not to enable an each of Video DIP

[Gwan-gyeong Mun]

Because DP ports don't use set_infoframes() / intel_write_infoframe()
machanisms, DP ports requires a handling of enabling/disabling of each
Video DIP when a changing usage of video DIP for SDP transmission such as
whether or not to use HDR.
For now it only adds enable_infoframe() callback for hsw platform.

v2: Minor style fix

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
---
 .../drm/i915/display/intel_display_types.h    |  4 +++
 drivers/gpu/drm/i915/display/intel_hdmi.c     | 36 +++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_hdmi.h     |  3 ++
 3 files changed, 43 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index bac40482a2aa..a541c8cc8d83 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1305,6 +1305,10 @@ struct intel_digital_port {
 			       const struct intel_crtc_state *crtc_state,
 			       unsigned int type,
 			       void *frame, ssize_t len);
+	void (*enable_infoframe)(struct intel_encoder *encoder,
+				 bool enable,
+				 const struct intel_crtc_state *crtc_state,
+				 unsigned int type);
 	void (*set_infoframes)(struct intel_encoder *encoder,
 			       bool enable,
 			       const struct intel_crtc_state *crtc_state,
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index b54ccbb5aad5..b62afeccd44e 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -559,6 +559,24 @@ static void hsw_read_infoframe(struct intel_encoder *encoder,
 						     type, i >> 2));
 }
 
+static void hsw_enable_infoframe(struct intel_encoder *encoder,
+				 bool enable,
+				 const struct intel_crtc_state *crtc_state,
+				 unsigned int type)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	i915_reg_t ctl_reg = HSW_TVIDEO_DIP_CTL(crtc_state->cpu_transcoder);
+	u32 val = I915_READ(ctl_reg);
+
+	if (enable)
+		val |= hsw_infoframe_enable(type);
+	else
+		val &= ~hsw_infoframe_enable(type);
+
+	I915_WRITE(ctl_reg, val);
+	POSTING_READ(ctl_reg);
+}
+
 static u32 hsw_infoframes_enabled(struct intel_encoder *encoder,
 				  const struct intel_crtc_state *pipe_config)
 {
@@ -586,6 +604,23 @@ static const u8 infoframe_type_to_idx[] = {
 	HDMI_INFOFRAME_TYPE_DRM,
 };
 
+void intel_enable_infoframe(struct intel_encoder *encoder,
+			    bool enable,
+			    const struct intel_crtc_state *crtc_state,
+			    unsigned int type)
+{
+	struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
+
+	if (dig_port->enable_infoframe) {
+		dig_port->enable_infoframe(encoder, enable, crtc_state, type);
+	} else {
+		struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+		DRM_DEBUG_KMS("GEN%d enable_infoframe() callback is not implemented!",
+			      INTEL_GEN(dev_priv));
+	}
+}
+
 u32 intel_hdmi_infoframe_enable(unsigned int type)
 {
 	int i;
@@ -3104,6 +3139,7 @@ void intel_infoframe_init(struct intel_digital_port *intel_dig_port)
 		} else {
 			intel_dig_port->write_infoframe = hsw_write_infoframe;
 			intel_dig_port->read_infoframe = hsw_read_infoframe;
+			intel_dig_port->enable_infoframe = hsw_enable_infoframe;
 			intel_dig_port->set_infoframes = hsw_set_infoframes;
 			intel_dig_port->infoframes_enabled = hsw_infoframes_enabled;
 		}
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.h b/drivers/gpu/drm/i915/display/intel_hdmi.h
index cf1ea5427639..86f925526514 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.h
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.h
@@ -48,5 +48,8 @@ void intel_read_infoframe(struct intel_encoder *encoder,
 			  const struct intel_crtc_state *crtc_state,
 			  enum hdmi_infoframe_type type,
 			  union hdmi_infoframe *frame);
+void intel_enable_infoframe(struct intel_encoder *encoder, bool enable,
+			    const struct intel_crtc_state *crtc_state,
+			    unsigned int type);
 
 #endif /* __INTEL_HDMI_H__ */
-- 
2.23.0