diff options
Diffstat (limited to 'include/drm/drm_connector.h')
| -rw-r--r-- | include/drm/drm_connector.h | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index e5f641cdab5a..f9f85a466cb8 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -329,19 +329,47 @@ struct drm_display_info { #define DRM_BUS_FLAG_DE_LOW (1<<0) #define DRM_BUS_FLAG_DE_HIGH (1<<1) -/* drive data on pos. edge */ + +/* + * Don't use those two flags directly, use the DRM_BUS_FLAG_PIXDATA_DRIVE_* + * and DRM_BUS_FLAG_PIXDATA_SAMPLE_* variants to qualify the flags explicitly. + * The DRM_BUS_FLAG_PIXDATA_SAMPLE_* flags are defined as the opposite of the + * DRM_BUS_FLAG_PIXDATA_DRIVE_* flags to make code simpler, as signals are + * usually to be sampled on the opposite edge of the driving edge. + */ #define DRM_BUS_FLAG_PIXDATA_POSEDGE (1<<2) -/* drive data on neg. edge */ #define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3) + +/* Drive data on rising edge */ +#define DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE DRM_BUS_FLAG_PIXDATA_POSEDGE +/* Drive data on falling edge */ +#define DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE DRM_BUS_FLAG_PIXDATA_NEGEDGE +/* Sample data on rising edge */ +#define DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE DRM_BUS_FLAG_PIXDATA_NEGEDGE +/* Sample data on falling edge */ +#define DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE DRM_BUS_FLAG_PIXDATA_POSEDGE + /* 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) -/* drive sync on pos. edge */ + +/* + * Similarly to the DRM_BUS_FLAG_PIXDATA_* flags, don't use these two flags + * directly, use one of the DRM_BUS_FLAG_SYNC_(DRIVE|SAMPLE)_* instead. + */ #define DRM_BUS_FLAG_SYNC_POSEDGE (1<<6) -/* drive sync on neg. edge */ #define DRM_BUS_FLAG_SYNC_NEGEDGE (1<<7) +/* Drive sync on rising edge */ +#define DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE DRM_BUS_FLAG_SYNC_POSEDGE +/* Drive sync on falling edge */ +#define DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE DRM_BUS_FLAG_SYNC_NEGEDGE +/* Sample sync on rising edge */ +#define DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE DRM_BUS_FLAG_SYNC_NEGEDGE +/* Sample sync on falling edge */ +#define DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE DRM_BUS_FLAG_SYNC_POSEDGE + /** * @bus_flags: Additional information (like pixel signal polarity) for * the pixel data on the bus, using DRM_BUS_FLAGS\_ defines. |