Add validity check for samsung,lane-count to ensure DT-provided lane count values are specification-compliant.
Suggested-by: Luca Ceresoli <[email protected]> Signed-off-by: Damon Ding <[email protected]> --- Changes in v5: - Apply DRM DP helper API to check the validity of DP lane count. Changes in v6: - Rebase after the new commit for restoring mandatory properties samsung,link-rate and samsung,lane-count. --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 5240efcd3861..039e076d2b8a 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1270,7 +1270,8 @@ static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp) return dev_err_probe(dp->dev, -EINVAL, "Failed to get samsung,link-rate\n"); video_info->max_link_rate = val; - if (of_property_read_u32(dp_node, "samsung,lane-count", &val)) + if (of_property_read_u32(dp_node, "samsung,lane-count", &val) || + !drm_dp_lane_count_is_valid(val)) return dev_err_probe(dp->dev, -EINVAL, "Failed to get samsung,lane-count\n"); video_info->max_lane_count = val; -- 2.34.1
