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imx8mq: Correct signed_hdmi firmware position

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signed_hdmi_imx8m.bin is already signed and has a IVT header. It should not
be put in u-boot-spl-mkimage.signed.bin. Move it to head of flash.bin
following NXP imx-mkimage. Keeping it in u-boot-spl-mkimage.signed.bin also
consumes a lot of TCM space which is not expected.

While moving it to head of flash.bin, other changes are required,
u-boot.itb is put at sector 768 per defconfig, so u-boot.itb binman
offset should be updated and it should be moved out from binman section.

Also binman symbol address are updated, so need to subtract u-boot-spl
image_pos + CONFIG_SPL_TEXT_BASE to find the correct location of ddr phy
firmware.

Because there is 1KB padding in HDMI firmware, use 32KB when burning
flash.bin to sd card.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan
2026-04-21 21:41:19 +08:00
committed by Fabio Estevam
parent 913b8c6cb8
commit 5b6dba2924
4 changed files with 169 additions and 132 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/dts/imx8mq-librem5-r4-u-boot.dtsi
View File

@@ -10,7 +10,7 @@
bootph-pre-ram;
};
&binman_imx_spl {
&binman {
section {
signed-hdmi-imx8m {
filename = "signed_dp_imx8m.bin";

40
arch/arm/dts/imx8mq-u-boot.dtsi
View File

@@ -41,6 +41,33 @@
filename = "flash.bin";
section {
pad-byte = <0x00>;
/*
* signed_hdmi_imx8m.bin contains a 1KB zero-filled padding at
* its beginning. This padding has no functional purpose, but
* the firmware is provided and signed by NXP, so the head
* must be preserved and should not be removed.
*
* When the signed HDMI firmware is placed at the beginning of
* flash.bin, the IVT header of u-boot-spl must still reside at
* a 4KB-aligned address. Since flash.bin starts with the HDMI
* firmware (including its 1KB padding), there is already a 1KB
* empty region at the head of flash.bin.
*
* The required 4KB alignment is therefore calculated relative
* to the location after this 1KB padding. To achieve this, we
* explicitly set align and align-size to 0x1000, and add an
* additional 0x400 (1KB) fill to account for the padding.
*/
signed-hdmi-imx8m {
filename = "signed_hdmi_imx8m.bin";
type = "blob-ext";
align = <0x1000>;
align-size = <0x1000>;
};
fill {
size = <0x400>;
};
#ifdef CONFIG_IMX_HAB
nxp-imx8mcst@0 {
@@ -91,20 +118,18 @@
align-end = <4>;
type = "blob-ext";
};
signed-hdmi-imx8m {
filename = "signed_hdmi_imx8m.bin";
type = "blob-ext";
};
};
};
#ifdef CONFIG_IMX_HAB
};
#endif
};
#ifdef CONFIG_IMX_HAB
nxp-imx8mcst@1 {
filename = "u-boot-fit.signed.bin";
nxp,loader-address = <CONFIG_SPL_LOAD_FIT_ADDRESS>;
offset = <0x58000>;
offset = <0x58400>;
args; /* Needed by mkimage etype superclass */
#endif
@@ -116,7 +141,7 @@
#endif
#address-cells = <1>;
offset = <0x57c00>;
offset = <0x58000>;
images {
uboot {
@@ -191,5 +216,4 @@
#ifdef CONFIG_IMX_HAB
};
#endif
};
};

4
doc/board/nxp/imx8mq_evk.rst
View File

@@ -45,11 +45,11 @@ Build U-Boot
$ make imx8mq_evk_defconfig
$ make
Burn the flash.bin to MicroSD card offset 33KB:
Burn the flash.bin to MicroSD card offset 32KB:
.. code-block:: bash
$sudo dd if=flash.bin of=/dev/sd[x] bs=1024 seek=33 conv=notrunc
$sudo dd if=flash.bin of=/dev/sd[x] bs=1024 seek=32 conv=notrunc
Boot
----

13
drivers/ddr/imx/phy/helper.c
View File

@@ -38,6 +38,8 @@ binman_sym_declare(ulong, ddr_2d_dmem_fw, image_pos);
binman_sym_declare(ulong, ddr_2d_dmem_fw, size);
#endif
binman_sym_declare(ulong, u_boot_spl, image_pos);
/* We need PHY iMEM PHY is 32KB padded */
void ddr_load_train_firmware(enum fw_type type)
{
@@ -49,6 +51,7 @@ void ddr_load_train_firmware(enum fw_type type)
unsigned long dmem_start;
unsigned long imem_len = IMEM_LEN, dmem_len = DMEM_LEN;
static enum fw_type last_type = -1;
unsigned long spl_start = 0;
/* If FW doesn't change, we can save the loading. */
if (last_type == type)
@@ -67,6 +70,9 @@ void ddr_load_train_firmware(enum fw_type type)
dmem_start = imem_start + imem_len;
if (BINMAN_SYMS_OK) {
if (IS_ENABLED(CONFIG_IMX8MQ))
spl_start = binman_sym(ulong, u_boot_spl, image_pos);
switch (type) {
case FW_1D_IMAGE:
imem_start = binman_sym(ulong, ddr_1d_imem_fw, image_pos);
@@ -83,6 +89,13 @@ void ddr_load_train_firmware(enum fw_type type)
#endif
break;
}
if (IS_ENABLED(CONFIG_IMX8MQ)) {
imem_start -= spl_start;
imem_start += CONFIG_SPL_TEXT_BASE;
dmem_start -= spl_start;
dmem_start += CONFIG_SPL_TEXT_BASE;
}
}
pr_from32 = imem_start;