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In dual-link mode the LVDS0 encoder transmits even-numbered pixels, and sends odd-numbered pixels to the LVDS1 encoder for transmission on a separate link. To implement support for this mode of operation, determine if the LVDS connection operates in dual-link mode by querying the next device in the pipeline, locate the companion encoder, and control it directly through its bridge operations. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Tested-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
32 lines
848 B
C
32 lines
848 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* rcar_lvds.h -- R-Car LVDS Encoder
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*
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* Copyright (C) 2013-2018 Renesas Electronics Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*/
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#ifndef __RCAR_LVDS_H__
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#define __RCAR_LVDS_H__
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struct drm_bridge;
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#if IS_ENABLED(CONFIG_DRM_RCAR_LVDS)
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int rcar_lvds_clk_enable(struct drm_bridge *bridge, unsigned long freq);
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void rcar_lvds_clk_disable(struct drm_bridge *bridge);
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bool rcar_lvds_dual_link(struct drm_bridge *bridge);
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#else
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static inline int rcar_lvds_clk_enable(struct drm_bridge *bridge,
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unsigned long freq)
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{
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return -ENOSYS;
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}
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static inline void rcar_lvds_clk_disable(struct drm_bridge *bridge) { }
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static inline bool rcar_lvds_dual_link(struct drm_bridge *bridge)
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{
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return false;
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}
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#endif /* CONFIG_DRM_RCAR_LVDS */
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#endif /* __RCAR_LVDS_H__ */
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