[PATCH 13/14] drm/i915/hdmi: Add helper to get max FRL rate for an HDMI sink

Add the helpers for getting the max FRL rate with and without DSC
for an HDMI sink.

Signed-off-by: Ankit Nautiyal <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_hdmi.c | 19 +++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_hdmi.h |  3 +++
 2 files changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 95393ec5d561..352a315b0fb0 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -3479,3 +3479,22 @@ intel_hdmi_dsc_get_bpp(int src_fractional_bpp, int slice_width, int num_slices,
 
 	return dsc_bpp_x16;
 }
+
+int intel_hdmi_sink_max_frl_rate(struct drm_connector *connector)
+{
+	int max_lanes = connector->display_info.hdmi.max_lanes;
+	int rate_per_lane = connector->display_info.hdmi.max_frl_rate_per_lane;
+
+	return max_lanes * rate_per_lane;
+}
+
+int intel_hdmi_sink_dsc_max_frl_rate(struct drm_connector *connector)
+{
+	int max_lanes = connector->display_info.hdmi.dsc_cap.max_lanes;
+	int rate_per_lane = connector->display_info.hdmi.dsc_cap.max_frl_rate_per_lane;
+
+	if (!max_lanes || !rate_per_lane)
+		return 0;
+
+	return max_lanes * rate_per_lane;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.h b/drivers/gpu/drm/i915/display/intel_hdmi.h
index 072c8d228697..f7a494df19e6 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.h
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.h
@@ -80,4 +80,7 @@ void hsw_read_infoframe(struct intel_encoder *encoder,
 void intel_hdmi_poll_for_scrambling_enable(const struct intel_crtc_state *crtc_state,
 					   struct drm_connector *_connector);
 
+int intel_hdmi_sink_max_frl_rate(struct drm_connector *connector);
+int intel_hdmi_sink_dsc_max_frl_rate(struct drm_connector *connector);
+
 #endif /* __INTEL_HDMI_H__ */
-- 
2.50.1