linux-kernel - [PATCH v2 4/9] drm/timings: Add link flags

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Date:   Thu, 15 Aug 2019 12:04:28 +0100
From:   Fabrizio Castro <fabrizio.castro@...renesas.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     Fabrizio Castro <fabrizio.castro@...renesas.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Simon Horman <horms@...ge.net.au>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        linux-renesas-soc@...r.kernel.org,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Jacopo Mondi <jacopo+renesas@...ndi.org>
Subject: [PATCH v2 4/9] drm/timings: Add link flags

We need more information to describe dual-LVDS links, therefore
introduce link_flags.

Signed-off-by: Fabrizio Castro <fabrizio.castro@...renesas.com>

---
v1->v2:
* new patch

 include/drm/drm_timings.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/include/drm/drm_timings.h b/include/drm/drm_timings.h
index 4af8814..58fbf1b 100644
--- a/include/drm/drm_timings.h
+++ b/include/drm/drm_timings.h
@@ -1,4 +1,6 @@
 /*
+ * Copyright (C) 2019 Renesas Electronics Corporation
+ *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
  * the above copyright notice appear in all copies and that both that copyright
@@ -21,6 +23,24 @@
 #ifndef __DRM_TIMINGS_H__
 #define __DRM_TIMINGS_H__
 
+#include <linux/bits.h>
+
+/**
+ * enum drm_link_flags - link_flags for &drm_timings
+ *
+ * This enum defines the details of the link.
+ *
+ * @DRM_LINK_DUAL_LVDS_ODD_EVEN:	Dual-LVDS link, with odd pixels (1,3,5,
+ *					etc.) coming through the first port, and
+ *					even pixels (0,2,4,etc.) coming through
+ *					the second port. If not specified for a
+ *					dual-LVDS panel, it is assumed that even
+ *					pixels are coming through the first port
+ */
+enum drm_link_flags {
+	DRM_LINK_DUAL_LVDS_ODD_EVEN = BIT(0),
+};
+
 /**
  * struct drm_timings - timing information
  */
@@ -55,6 +75,12 @@ struct drm_timings {
 	 * and odd-numbered pixels are received on separate links.
 	 */
 	bool dual_link;
+	/**
+	 * @link_flags
+	 *
+	 * Provides detailed information about the link.
+	 */
+	enum drm_link_flags link_flags;
 };
 
 #endif /* __DRM_TIMINGS_H__ */
-- 
2.7.4