[PATCH 3/3] board: ti: am62x: evm: Update simple-framebuffer node in device-tree

Devarsh Thakkar
2024-09-25T15:15:05Z

Update simple-framebuffer device-tree node by enumerating framebuffer
related information in existing simple-framebuffer node in Linux
device-tree file and enabling it.

In case there is no simple-framebuffer stub detected in Linux kernel
device-tree and video is still active, then update the device-tree to
reserve the framebuffer region for the active splash screen.

This helps preserve the splash screen till the display server takes over
after OS is booted.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
---
board/ti/am62x/evm.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/board/ti/am62x/evm.c b/board/ti/am62x/evm.c
index 9bdd0223cdb6..be0447f6e9ea 100644
--- a/board/ti/am62x/evm.c
+++ b/board/ti/am62x/evm.c
@@ -16,6 +16,7 @@
#include <cpu_func.h>
#include <k3-ddrss.h>
#include <fdt_support.h>
+#include <fdt_simplefb.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <dm/uclass.h>
@@ -162,3 +163,23 @@ void spl_perform_fixups(struct spl_image_info *spl_image)
#endif
}
#endif
+
+#if defined(CONFIG_OF_BOARD_SETUP)
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+ int ret = -1;
+
+ if (IS_ENABLED(CONFIG_FDT_SIMPLEFB))
+ ret = fdt_simplefb_enable_and_mem_rsv(blob);
+
+ /* If simplefb is not enabled and video is active, then at least reserve
+ * the framebuffer region to preserve the splash screen while OS is booting
+ */
+ if (IS_ENABLED(CONFIG_VIDEO) && IS_ENABLED(CONFIG_OF_LIBFDT)) {
+ if (ret && video_is_active())
+ return fdt_add_fb_mem_rsv(blob);
+ }
+
+ return 0;
+}
+#endif
--
2.39.1