[PATCH 1/2] rockchip: rk356x: Implement checkboard() to print SoC variant
Jonas Karlman
jonas at kwiboo.se
Wed Oct 30 17:54:54 CET 2024
Hi Kever,
On 2024-10-30 07:40, Kever Yang wrote:
> Hi Jonas,
>
>
> On 2024/10/19 00:34, Jonas Karlman wrote:
>> Implement checkboard() to print current SoC model, e.g. one of:
>>
>> SoC: RK3566 v1
>> SoC: RK3566 v2
>> SoC: RK3566T v2
>> SoC: RK3568 v2
>> SoC: RK3568B2 v2
>> SoC: RK3568J v2
>
> Did you get these types from different board, or is there a document
> for this?
These are the unique prints running the checkboard() on different rk356x
boards I have.
>
> I didn't see this kind of document :(
I did not find this information in any document, this was mostly based
on patterns in observed OTP values sampled from different boards.
Information for cpu-code (3566 or 3568) and cpu-version (0, 1 or 2) was
picked from vendor 4.19/5.10/6.1 DTs from the OTP nvmem cells.
The cpu-version also seem to correspond to the second letter of the lot
number, e.g. 0x0 = xAxxxxxx yyww, 0x1 = xBxxxxxx yyww etc.
Information about the B, J and S variant seem to be consistent for both
rk356x and rk3588. Vendor 5.10/6.1 kernel driver for cpufreq/gpu/opp use
specification_serial_number nvmem cell to detect rk3588 M (0xd) and
J (0xa) variants.
The value seemed to correspond to 0x1 = A, 0x2 = B, ..., 0xa = J,
0xd = M, 0x13 = S, i.e. '@' + <value> = variant char in ascii table.
Information about the B2 or S2 revision seemed to correspond to the
package_serial_number nvmem cells on rk3588. Similar bits also seemed to
exist for rk356x even if there was no ref to package_serial_number in
any vendor DT for rk356x. E.g. on boards with B2 or S2 soc variants had
package_serial_number = 0x2, rest of my boards had a value of 0x1.
The T-variant of rk3566 did not seem to follow above pattern and it
instead use specification_serial_number = 0x1. A commit "arm64: dts:
rockchip: rk3568: adjust opp-table for rk356x-t" [1] instead pointed to
a performance nvmem cell.
For all my RK3566T boards that performance byte in OTP was 0x51, and if
I play with that value: 0x51 >> 2 = 0x14 => 'T'-variant ;-)
If you have any details and/or can confirm if some of my assumptions
above are correct or not correct that would be nice :-)
[1] https://github.com/radxa/kernel/commit/2dfd51da472e7ebb5ef0d3db78f902454af826b8
>
>
>>
>> when U-Boot proper is started.
>>
>> Information about what SoC model, variant and version is read from OTP.
>>
>> Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
>> ---
>> arch/arm/dts/rk356x-u-boot.dtsi | 4 ++
>> arch/arm/mach-rockchip/rk3568/rk3568.c | 65 ++++++++++++++++++++++++++
>> configs/generic-rk3568_defconfig | 2 +-
>
> Please split the driver change and config/dts change in different patch.
I will split in a v2 and look into reworking this as a sysinfo driver.
Regards,
Jonas
>
>
> Thanks,
> - Kever
>> 3 files changed, 70 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/dts/rk356x-u-boot.dtsi b/arch/arm/dts/rk356x-u-boot.dtsi
>> index 0a0943b462a9..24a976cf7e21 100644
>> --- a/arch/arm/dts/rk356x-u-boot.dtsi
>> +++ b/arch/arm/dts/rk356x-u-boot.dtsi
>> @@ -87,6 +87,10 @@
>> bootph-all;
>> };
>>
>> +&otp {
>> + bootph-some-ram;
>> +};
>> +
>> &pcfg_pull_none {
>> bootph-all;
>> };
>> diff --git a/arch/arm/mach-rockchip/rk3568/rk3568.c b/arch/arm/mach-rockchip/rk3568/rk3568.c
>> index 768a37393290..fc4c140ab970 100644
>> --- a/arch/arm/mach-rockchip/rk3568/rk3568.c
>> +++ b/arch/arm/mach-rockchip/rk3568/rk3568.c
>> @@ -4,6 +4,7 @@
>> */
>>
>> #include <dm.h>
>> +#include <misc.h>
>> #include <asm/armv8/mmu.h>
>> #include <asm/arch-rockchip/bootrom.h>
>> #include <asm/arch-rockchip/grf_rk3568.h>
>> @@ -133,3 +134,67 @@ int arch_cpu_init(void)
>> #endif
>> return 0;
>> }
>> +
>> +#define RK3568_OTP_CPU_CODE_OFFSET 0x02
>> +#define RK3568_OTP_SPECIFICATION_OFFSET 0x07
>> +#define RK3568_OTP_CPU_VERSION_OFFSET 0x08
>> +#define RK3568_OTP_PERFORMANCE_OFFSET 0x22
>> +
>> +int checkboard(void)
>> +{
>> + u8 cpu_code[2], specification, package, cpu_version, performance;
>> + struct udevice *dev;
>> + char suffix[3];
>> + int ret;
>> +
>> + ret = uclass_get_device_by_driver(UCLASS_MISC,
>> + DM_DRIVER_GET(rockchip_otp), &dev);
>> + if (ret) {
>> + debug("%s: could not find otp device, ret=%d\n", __func__, ret);
>> + return 0;
>> + }
>> +
>> + /* cpu-code: SoC model, 0x35 0x66 or 0x35 0x68 */
>> + ret = misc_read(dev, RK3568_OTP_CPU_CODE_OFFSET, cpu_code, 2);
>> + if (ret < 0) {
>> + debug("%s: could not read cpu-code, ret=%d\n", __func__, ret);
>> + return 0;
>> + }
>> +
>> + /* specification: SoC variant, 0x2 for RK3568B2 and 0xA for RK3568J */
>> + ret = misc_read(dev, RK3568_OTP_SPECIFICATION_OFFSET, &specification, 1);
>> + if (ret < 0) {
>> + debug("%s: could not read specification, ret=%d\n", __func__, ret);
>> + return 0;
>> + }
>> + /* package: likely SoC variant revision, 0x2 for RK3568B2 */
>> + package = specification >> 5;
>> + specification &= 0x1f;
>> +
>> + /* cpu-version: chip version, e.g. second letter of lot number */
>> + ret = misc_read(dev, RK3568_OTP_CPU_VERSION_OFFSET, &cpu_version, 1);
>> + if (ret < 0) {
>> + debug("%s: could not read cpu-version, ret=%d\n", __func__, ret);
>> + return 0;
>> + }
>> + cpu_version >>= 3;
>> + cpu_version &= 0x7;
>> +
>> + /* performance: used to identify RK3566T SoC variant */
>> + ret = misc_read(dev, RK3568_OTP_PERFORMANCE_OFFSET, &performance, 1);
>> + if (ret < 0) {
>> + debug("%s: could not read performance, ret=%d\n", __func__, ret);
>> + return 0;
>> + }
>> + if (performance & 0x0f)
>> + specification = 0x14; /* T-variant */
>> +
>> + suffix[0] = specification > 1 ? '@' + specification : 0;
>> + suffix[1] = package > 1 ? '0' + package : 0;
>> + suffix[2] = 0;
>> +
>> + printf("SoC: RK%02x%02x%s v%u\n",
>> + cpu_code[0], cpu_code[1], suffix, cpu_version);
>> +
>> + return 0;
>> +}
>> diff --git a/configs/generic-rk3568_defconfig b/configs/generic-rk3568_defconfig
>> index 1d06f3411fe0..f79f0e84400b 100644
>> --- a/configs/generic-rk3568_defconfig
>> +++ b/configs/generic-rk3568_defconfig
>> @@ -22,7 +22,6 @@ CONFIG_SPL_LOAD_FIT=y
>> CONFIG_LEGACY_IMAGE_FORMAT=y
>> CONFIG_DEFAULT_FDT_FILE="rockchip/rk3568-generic.dtb"
>> # CONFIG_DISPLAY_CPUINFO is not set
>> -CONFIG_DISPLAY_BOARDINFO_LATE=y
>> CONFIG_SPL_MAX_SIZE=0x40000
>> CONFIG_SPL_PAD_TO=0x7f8000
>> # CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
>> @@ -31,6 +30,7 @@ CONFIG_SYS_SPI_U_BOOT_OFFS=0x60000
>> CONFIG_SPL_ATF=y
>> CONFIG_CMD_GPIO=y
>> CONFIG_CMD_GPT=y
>> +CONFIG_CMD_MISC=y
>> CONFIG_CMD_MMC=y
>> CONFIG_CMD_ROCKUSB=y
>> CONFIG_CMD_USB_MASS_STORAGE=y
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