linux/include/drm/display
Damon Ding 6eac4c8bb1 drm/dp: Add helper to validate DP lane counts
Add a generic helper function drm_dp_lane_count_is_valid() to check
if a DisplayPort lane count is valid. According to the DP specification,
only 1, 2, or 4 lanes are supported.

This helper avoids duplicating DP lane count validation logic across
individual DisplayPort drivers.

Suggested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Link: https://patch.msgid.link/20260828065153.590802-3-damon.ding@rock-chips.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
2026-09-09 15:36:12 +02:00
..
drm_dp_aux_bus.h drm/dp: Add callbacks to make using DP AUX bus properly easier 2022-06-02 15:14:16 -07:00
drm_dp_dual_mode_helper.h drm/i915/lspcon: do not hardcode settle timeout 2025-01-27 14:54:46 -05:00
drm_dp_helper.h drm/dp: Add helper to validate DP lane counts 2026-09-09 15:36:12 +02:00
drm_dp_mst_helper.h drm: Rename struct drm_atomic_state to drm_atomic_commit 2026-05-04 14:05:04 +10:00
drm_dp_tunnel.h drm/dp_tunnel: Add UHBR tunneling support 2026-07-20 15:46:08 +03:00
drm_dp.h Merge drm/drm-next into drm-misc-next 2026-08-31 09:01:06 +02:00
drm_dsc_helper.h drm/display/dsc: Add a helper to dump the DSC configuration 2024-07-03 18:05:12 +03:00
drm_dsc.h drm/i915/dp: Fix DSC line buffer depth programming 2024-04-19 17:05:35 +03:00
drm_hdcp_helper.h
drm_hdcp.h
drm_hdmi_audio_helper.h drm/bridge: allow limiting I2S formats 2025-05-21 01:33:58 +03:00
drm_hdmi_cec_helper.h drm/display: add CEC helpers code 2025-05-21 01:35:16 +03:00
drm_hdmi_helper.h drm/display: hdmi: Use drm_output_color_format instead of hdmi_colorspace 2026-03-24 13:54:35 +01:00
drm_hdmi_state_helper.h drm/debugfs: Move HDMI debugfs registration to state helper 2026-08-13 16:07:41 +01:00
drm_scdc_helper.h drm/scdc-helper: Implement parsing and printing HDMI 2.1 fields 2026-08-13 16:07:41 +01:00
drm_scdc.h drm/scdc-helper: Implement parsing and printing HDMI 2.1 fields 2026-08-13 16:07:41 +01:00