[PATCH 4/5] drm/i915/hdmi: Add helper to get max FRL rate for an HDMI sink

[Ankit Nautiyal <ankit.k.nautiyal@intel.com>]

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

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 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 d3efd9e4e86a..9b637e38a1a5 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -3422,3 +3422,22 @@ intel_hdmi_dsc_get_bpp(int src_fractional_bpp, int slice_width, int num_slices,
 
 	return 0;
 }
+
+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 c3a0e81615e4..c95ed37bcc0c 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.h
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.h
@@ -75,4 +75,7 @@ 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