diff options
| author | Cristian Ciocaltea <cristian.ciocaltea@collabora.com> | 2026-09-01 21:50:40 +0300 |
|---|---|---|
| committer | Cristian Ciocaltea <cristian.ciocaltea@collabora.com> | 2026-09-19 23:03:44 +0300 |
| commit | 2e37ecb36d8e989a514d5f921eadd91ed178861d (patch) | |
| tree | d00e5403d95e7231573a6305d0a0fb647023259c /include | |
| parent | 44fd815ec6ab5ae8e01de26529fe867bd0c07da1 (diff) | |
drm/bridge: Add bridge ops for source-side HDMI 2.0 scrambling
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.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://patch.msgid.link/20260901-dw-hdmi-qp-scramb-v11-16-bc12954a0688@collabora.com
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_bridge.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 5a5a25995471..77b3ffe69230 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -562,6 +562,41 @@ struct drm_bridge_funcs { 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: * * This callback clears the infoframes in the hardware during commit. |