Add an API which enforces framebuffer reservation from end of RAM.
This is done so that next stage can directly skip this region before
carrying out further reservations.
Signed-off-by: Devarsh Thakkar <devar...@ti.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---
V2:
No change.
V3:
Change spl_reserve_video to spl_reserve_video_from_ram_top
which enforce framebuffer reservation from end of RAM.
V4:
Split this to an independent patch with more details added
in comments for API in header file.
V5:
Add Reviewed-By
---
common/spl/spl.c | 19 +++++++++++++++++++
include/spl.h | 10 ++++++++++
2 files changed, 29 insertions(+)
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 3ce5bfeec8..b65c439e7a 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -42,6 +42,7 @@
#include <fdt_support.h>
#include <bootcount.h>
#include <wdt.h>
+#include <video.h>
DECLARE_GLOBAL_DATA_PTR;
DECLARE_BINMAN_MAGIC_SYM;
@@ -152,6 +153,24 @@ void spl_fixup_fdt(void *fdt_blob)
#endif
}
+int spl_reserve_video_from_ram_top(void)
+{
+ if (CONFIG_IS_ENABLED(VIDEO)) {
+ ulong addr;
+ int ret;
+
+ addr = gd->ram_top;
+ ret = video_reserve(&addr);
+ if (ret)
+ return ret;
+ debug("Reserving %luk for video at: %08lx\n",
+ ((unsigned long)gd->relocaddr - addr) >> 10, addr);
+ gd->relocaddr = addr;
+ }
+
+ return 0;
+}
+
ulong spl_get_image_pos(void)
{
if (!CONFIG_IS_ENABLED(BINMAN_UBOOT_SYMBOLS))
diff --git a/include/spl.h b/include/spl.h
index 0952188901..043875f10f 100644
--- a/include/spl.h
+++ b/include/spl.h
@@ -889,6 +889,16 @@ int spl_usb_load(struct spl_image_info *spl_image,
int spl_ymodem_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev);
+/**
+ * spl_reserve_video_from_ram_top() - Reserve framebuffer memory from end of
RAM
+ *
+ * This enforces framebuffer reservation at SPL stage from end of RAM so that
+ * next stage can directly skip this pre-reserved area before carrying out
+ * further reservations. The allocation address is stored in struct
video_uc_plat.
+ *
+ * Return: 0 on success, otherwise error code
+ */
+int spl_reserve_video_from_ram_top(void);
/**
* spl_invoke_atf - boot using an ARM trusted firmware image
--
2.34.1
