common: add fdt_simplefb_enable_and_mem_rsv function
Add a new function to activate an existing simple frame buffer node
and add the associated reserved memory, with no-map properties.
This device tree update is only done when the video device is active
and the video buffer is used.
This patch uses '#if CONFIG_IS_ENABLED(DM_VIDEO)' because
gd->video_bottom and gd->video_top are only defined when CONFIG_DM_VIDEO
is activated.
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/common/fdt_simplefb.c b/common/fdt_simplefb.c
index 3217303..c52846f 100644
--- a/common/fdt_simplefb.c
+++ b/common/fdt_simplefb.c
@@ -89,3 +89,30 @@
return fdt_simplefb_configure_node(blob, off);
}
+
+#if CONFIG_IS_ENABLED(DM_VIDEO)
+int fdt_simplefb_enable_and_mem_rsv(void *blob)
+{
+ struct fdt_memory mem;
+ int ret;
+
+ /* nothing to do when video is not active */
+ if (!video_is_active())
+ return 0;
+
+ ret = fdt_simplefb_enable_existing_node(blob);
+ if (ret)
+ return ret;
+
+ /* nothing to do when the frame buffer is not defined */
+ if (gd->video_bottom == gd->video_top)
+ return 0;
+
+ /* reserved with no-map tag the video buffer */
+ mem.start = gd->video_bottom;
+ mem.end = gd->video_top - 1;
+
+ return fdtdec_add_reserved_memory(blob, "framebuffer", &mem, NULL, 0, NULL,
+ FDTDEC_RESERVED_MEMORY_NO_MAP);
+}
+#endif