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 devarsht@ti.com --- 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. --- 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