HDMI2.1 supports higher resolutions using Fixed Rate Link.
Source need to do FRL link training on the 4 lanes before video
stream transmission.
This patch adds the members to crtc_state and intel_hdmi for
identifying the FRL supporting HDMI sink and to maintain the frl
training information, after successful training.
Signed-off-by: Ankit Nautiyal <ankit.k.nauti...@intel.com>
---
.../drm/i915/display/intel_display_types.h | 9 ++++++++
drivers/gpu/drm/i915/display/intel_hdmi.c | 22 +++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
b/drivers/gpu/drm/i915/display/intel_display_types.h
index c6abaaa46e17..e57fac00e945 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1517,8 +1517,17 @@ struct intel_hdmi {
} dp_dual_mode;
bool has_hdmi_sink;
bool has_audio;
+ bool has_sink_hdmi_21;
+ int max_frl_rate;
+ int max_dsc_frl_rate;
struct intel_connector *attached_connector;
struct cec_notifier *cec_notifier;
+ struct {
+ bool trained;
+ int lanes;
+ int rate_gbps;
+ int ffe_level;
+ } frl;
};
struct intel_dp_mst_encoder;
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c
b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 02f8374ea51f..1dd0b0f2e2f1 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2346,6 +2346,7 @@ intel_hdmi_unset_edid(struct drm_connector *connector)
intel_hdmi->has_hdmi_sink = false;
intel_hdmi->has_audio = false;
+ intel_hdmi->has_sink_hdmi_21 = false;
intel_hdmi->dp_dual_mode.type = DRM_DP_DUAL_MODE_NONE;
intel_hdmi->dp_dual_mode.max_tmds_clock = 0;
@@ -2405,11 +2406,21 @@ intel_hdmi_dp_dual_mode_detect(struct drm_connector
*connector)
}
}
+static void
+intel_hdmi_reset_frl_config(struct intel_hdmi *intel_hdmi)
+{
+ intel_hdmi->frl.trained = false;
+ intel_hdmi->frl.lanes = 0;
+ intel_hdmi->frl.rate_gbps = 0;
+ intel_hdmi->frl.ffe_level = 0;
+}
+
static bool
intel_hdmi_set_edid(struct drm_connector *connector)
{
struct drm_i915_private *dev_priv = to_i915(connector->dev);
struct intel_hdmi *intel_hdmi =
intel_attached_hdmi(to_intel_connector(connector));
+ struct intel_encoder *encoder = &hdmi_to_dig_port(intel_hdmi)->base;
intel_wakeref_t wakeref;
struct edid *edid;
bool connected = false;
@@ -2431,10 +2442,21 @@ intel_hdmi_set_edid(struct drm_connector *connector)
to_intel_connector(connector)->detect_edid = edid;
if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
+ int src_rate_lane_gbps =
DIV_ROUND_UP(intel_bios_hdmi_max_frl_rate(encoder),
+ 1000000);
+ int max_src_rate = src_rate_lane_gbps * 4;
+
intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
intel_hdmi_dp_dual_mode_detect(connector);
+ intel_hdmi->has_sink_hdmi_21 =
+ drm_hdmi_sink_max_frl_rate(connector) > 0 ? true :
false;
+ intel_hdmi->max_frl_rate =
min(drm_hdmi_sink_max_frl_rate(connector),
+ max_src_rate);
+ intel_hdmi->max_dsc_frl_rate =
min(drm_hdmi_sink_dsc_max_frl_rate(connector),
+ max_src_rate);
+ intel_hdmi_reset_frl_config(intel_hdmi);
connected = true;
}
--
2.25.1
