[PATCH v2 2/3] drm: introduce bus_flags in drm_display_info

[Stefan Agner <stefan@agner.ch>]

Introduce bus_flags to specify display bus properties like signal
polarities. This is useful for parallel display buses, e.g. to
specify the pixel clock or data enable polarity.

Suggested-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
 include/drm/drm_crtc.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index c65a212..20a489d 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -126,6 +126,14 @@ enum subpixel_order {
 #define DRM_COLOR_FORMAT_RGB444		(1<<0)
 #define DRM_COLOR_FORMAT_YCRCB444	(1<<1)
 #define DRM_COLOR_FORMAT_YCRCB422	(1<<2)
+
+#define DRM_BUS_FLAG_DE_LOW		(1<<0)
+#define DRM_BUS_FLAG_DE_HIGH		(1<<1)
+/* drive data on pos. edge */
+#define DRM_BUS_FLAG_PIXDATA_POSEDGE	(1<<2)
+/* drive data on neg. edge */
+#define DRM_BUS_FLAG_PIXDATA_NEGEDGE	(1<<3)
+
 /*
  * Describes a given display (e.g. CRT or flat panel) and its limitations.
  */
@@ -147,6 +155,7 @@ struct drm_display_info {
 
 	const u32 *bus_formats;
 	unsigned int num_bus_formats;
+	u32 bus_flags;
 
 	/* Mask of supported hdmi deep color modes */
 	u8 edid_hdmi_dc_modes;
-- 
2.7.1