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@xxxxxxxxxxxxxxxx>
---
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
--
Regards,
Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
