Bridges advertising HDMI 2.0 must be able to enable and disable
source-side scrambling and the high TMDS clock ratio when the configured
mode exceeds 340 MHz.
Add .hdmi_scrambler_{enable|disable}() callbacks covering the
source-side programming only; sink-side SCDC negotiation remains the job
of the HDMI connector helpers.
Signed-off-by: Cristian Ciocaltea <[email protected]>
---
include/drm/drm_bridge.h | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 2d8b5e4c64ba..236d1cabe669 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -656,6 +656,41 @@ struct drm_bridge_funcs {
const struct drm_display_mode *mode,
unsigned long long tmds_rate);
+ /**
+ * @hdmi_scrambler_enable:
+ *
+ * Enable source-side scrambling and the high TMDS clock ratio for the
+ * mode currently being applied.
+ *
+ * This only programs the source side. Sink-side SCDC configuration is
+ * handled by the HDMI connector helpers.
+ *
+ * Mandatory for bridges that set the DRM_BRIDGE_OP_HDMI flag in their
+ * &drm_bridge->ops and advertise HDMI_VERSION_2_0 or later via
+ * &drm_bridge->supported_hdmi_ver; unused otherwise.
+ *
+ * Returns:
+ * 0 on success, a negative error code otherwise.
+ */
+ int (*hdmi_scrambler_enable)(struct drm_bridge *bridge);
+
+ /**
+ * @hdmi_scrambler_disable:
+ *
+ * Disable source-side scrambling and the high TMDS clock ratio.
+ *
+ * This only programs the source side. Sink-side SCDC configuration is
+ * handled by the HDMI connector helpers.
+ *
+ * Mandatory for bridges that set the DRM_BRIDGE_OP_HDMI flag in their
+ * &drm_bridge->ops and advertise HDMI_VERSION_2_0 or later via
+ * &drm_bridge->supported_hdmi_ver; unused otherwise.
+ *
+ * Returns:
+ * 0 on success, a negative error code otherwise.
+ */
+ int (*hdmi_scrambler_disable)(struct drm_bridge *bridge);
+
/**
* @hdmi_clear_avi_infoframe:
*
--
2.54.0
