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drm: Add data transmission order bus flag 

The flags indicate whether data is transmitted LSB to MSB or MSB to LSB
on the bus.

The exact meaning is bus-type dependent. For instance, for LVDS buses
the flags indicate whether the seven data bits transmitted in a clock
pulse are sent in normal order (MSB to LSB, slots 0 to 6) or reverse
order (LSB to MSB, slots 6 to 0).

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Laurent Pinchart 2016-11-18 16:55:48 +02:00
parent 0b5a3042b7
commit 5ec1a96010
1 changed files with 4 additions and 0 deletions
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4
include/drm/drm_connector.h
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@ -224,6 +224,10 @@ struct drm_display_info {
#define DRM_BUS_FLAG_PIXDATA_POSEDGE (1<<2)
/* drive data on neg. edge */
#define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3)
/* data is transmitted MSB to LSB on the bus */
#define DRM_BUS_FLAG_DATA_MSB_TO_LSB (1<<4)
/* data is transmitted LSB to MSB on the bus */
#define DRM_BUS_FLAG_DATA_LSB_TO_MSB (1<<5)
/**
* @bus_flags: Additional information (like pixel signal polarity) for