The drm_display_info structure contains bus flags that specify on which pixel clock edge the data are driven and sampled. Add a set of flags to specify the pixel clock edge for sync signals, as they can be driven and sampled on the opposite clock edge of the data signals.
Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com --- drivers/gpu/drm/drm_modes.c | 10 ++++++++-- include/drm/drm_connector.h | 4 ++++ 2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index c78ca0e84ffd..2daa19e0b4c1 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -661,8 +661,9 @@ EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode); * @vm: videomode structure to use * @bus_flags: information about pixelclk and DE polarity will be stored here * - * Sets DRM_BUS_FLAG_DE_(LOW|HIGH) and DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE - * in @bus_flags according to DISPLAY_FLAGS found in @vm + * Sets DRM_BUS_FLAG_DE_(LOW|HIGH), DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE and + * DRM_BUS_FLAG_SYNC_(POS|NEG)EDGE in @bus_flags according to DISPLAY_FLAGS + * found in @vm */ void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) { @@ -676,6 +677,11 @@ void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags) *bus_flags |= DRM_BUS_FLAG_DE_LOW; if (vm->flags & DISPLAY_FLAGS_DE_HIGH) *bus_flags |= DRM_BUS_FLAG_DE_HIGH; + + if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) + *bus_flags |= DRM_BUS_FLAG_SYNC_POSEDGE; + if (vm->flags & DISPLAY_FLAGS_SYNC_NEGEDGE) + *bus_flags |= DRM_BUS_FLAG_SYNC_NEGEDGE; } EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 675cc3f8cf85..ad8f87c77390 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -290,6 +290,10 @@ struct drm_display_info { #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 [hv]sync on pos. edge */ +#define DRM_BUS_FLAG_SYNC_POSEDGE (1<<6) +/* drive [hv]sync on neg. edge */ +#define DRM_BUS_FLAG_SYNC_NEGEDGE (1<<7)
/** * @bus_flags: Additional information (like pixel signal polarity) for