drm/i915/display: Allow fastset for change in HDR infoframe

Changes in Dynamic Range and Mastering infoframe
should not trigger a full modeset. Therefore, allow
fastset. DP SDP programming is already hooked up in the
fastset flow but HDMI AVI infoframe update is not, add it.
Any other infoframe that can be fastset should be added to
the helper intel_hdmi_fastset_infoframes().

v3:
 - Create a wrapper intel_ddi_update_pipe_hdmi to stick to
   uniform naming (Jani)
 - Do not disable HDMI AVI infoframe if already disabled (Uma)

v2:
 - Update HDMI AVI infoframe during fastset.

Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241023044122.3889137-1-chaitanya.kumar.borah@intel.com

Author: ckborah

drivers/gpu/drm/i915/display/intel_ddi.c

@@ -3513,6 +3513,13 @@ static void intel_ddi_update_pipe_dp(struct intel_atomic_state *state,
 	drm_connector_update_privacy_screen(conn_state);
 }
 
+static void intel_ddi_update_pipe_hdmi(struct intel_encoder *encoder,
+				       const struct intel_crtc_state *crtc_state,
+				       const struct drm_connector_state *conn_state)
+{
+	intel_hdmi_fastset_infoframes(encoder, crtc_state, conn_state);
+}
+
 void intel_ddi_update_pipe(struct intel_atomic_state *state,
 			   struct intel_encoder *encoder,
 			   const struct intel_crtc_state *crtc_state,
@@ -3524,6 +3531,10 @@ void intel_ddi_update_pipe(struct intel_atomic_state *state,
 		intel_ddi_update_pipe_dp(state, encoder, crtc_state,
 					 conn_state);
 
+	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+		intel_ddi_update_pipe_hdmi(encoder, crtc_state,
+					   conn_state);
+
 	intel_hdcp_update_pipe(state, encoder, crtc_state, conn_state);
 }
 

drivers/gpu/drm/i915/display/intel_display.c

@@ -5702,7 +5702,8 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 	PIPE_CONF_CHECK_INFOFRAME(avi);
 	PIPE_CONF_CHECK_INFOFRAME(spd);
 	PIPE_CONF_CHECK_INFOFRAME(hdmi);
-	PIPE_CONF_CHECK_INFOFRAME(drm);
+	if (!fastset)
+		PIPE_CONF_CHECK_INFOFRAME(drm);
 	PIPE_CONF_CHECK_DP_VSC_SDP(vsc);
 	PIPE_CONF_CHECK_DP_AS_SDP(as_sdp);
 

drivers/gpu/drm/i915/display/intel_hdmi.c

@@ -1212,6 +1212,30 @@ static void vlv_set_infoframes(struct intel_encoder *encoder,
 			      &crtc_state->infoframes.hdmi);
 }
 
+void intel_hdmi_fastset_infoframes(struct intel_encoder *encoder,
+				   const struct intel_crtc_state *crtc_state,
+				   const struct drm_connector_state *conn_state)
+{
+	struct intel_display *display = to_intel_display(encoder);
+	i915_reg_t reg = HSW_TVIDEO_DIP_CTL(display,
+					    crtc_state->cpu_transcoder);
+	u32 val = intel_de_read(display, reg);
+
+	if ((crtc_state->infoframes.enable &
+		intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_DRM)) == 0 &&
+			(val & VIDEO_DIP_ENABLE_DRM_GLK) == 0)
+		return;
+
+	val &= ~(VIDEO_DIP_ENABLE_DRM_GLK);
+
+	intel_de_write(display, reg, val);
+	intel_de_posting_read(display, reg);
+
+	intel_write_infoframe(encoder, crtc_state,
+			      HDMI_INFOFRAME_TYPE_DRM,
+			      &crtc_state->infoframes.drm);
+}
+
 static void hsw_set_infoframes(struct intel_encoder *encoder,
 			       bool enable,
 			       const struct intel_crtc_state *crtc_state,

drivers/gpu/drm/i915/display/intel_hdmi.h

@@ -42,6 +42,9 @@ u32 intel_hdmi_infoframes_enabled(struct intel_encoder *encoder,
 u32 intel_hdmi_infoframe_enable(unsigned int type);
 void intel_hdmi_read_gcp_infoframe(struct intel_encoder *encoder,
 				   struct intel_crtc_state *crtc_state);
+void intel_hdmi_fastset_infoframes(struct intel_encoder *encoder,
+				   const struct intel_crtc_state *crtc_state,
+				   const struct drm_connector_state *conn_state);
 void intel_read_infoframe(struct intel_encoder *encoder,
 			  const struct intel_crtc_state *crtc_state,
 			  enum hdmi_infoframe_type type,