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# RK3568 Release Note
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## rk3568_bl31_v1.37.elf
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| Date | File | Build commit | Severity |
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| ---------- | --------------------- | ------------ | --------- |
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| 2023-02-02 | rk3568_bl31_v1.37.elf | 1cd72fefa | important |
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### New
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1. Enable sdei.
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2. Support config l3 partition according to atags.
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------
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## rk3568_ddr_{1560...324}MHz_v1.15.bin
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| Date | File | Build commit | Severity |
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| ---------- | ------------------------------------ | ------------ | --------- |
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| 2022-11-08 | rk3568_ddr_{1560...324}MHz_v1.15.bin | ec2fae0c96 | important |
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### Fixed
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| Index | Severity | Update | Issue description | Issue source |
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| ----- | --------- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------ |
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| 1 | important | To solve the instability problem of some chips when DDR run in 324MHz. | When DDR run in 324MHz, the system would unstable, causing a crash and restart | - |
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------
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## rk3568_bl31_v1.36.elf
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| Date | File | Build commit | Severity |
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| ---------- | --------------------- | ------------ | --------- |
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| 2022-11-08 | rk3568_bl31_v1.36.elf | 2c8be93f9 | important |
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### Fixed
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| Index | Severity | Update | Issue description | Issue source |
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| ----- | --------- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------ |
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| 1 | important | To solve the instability problem of some chips when DDR run in 324MHz. | When DDR run in 324MHz, the system would unstable, causing a crash and restart | - |
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## rk356x_usbplug_v1.16.bin
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| Date | File | Build commit | Severity |
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| ---------- | :----------------------- | ------------ | -------- |
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| 2022-11-02 | rk356x_usbplug_v1.16.bin | eaaeb1 | moderate |
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### New
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1. Support more spiflash
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## rk3568_bl31_v1.35.elf
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| Date | File | Build commit | Severity |
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| ---------- | :-------------------- | ------------ | --------- |
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| 2022-10-24 | rk3568_bl31_v1.35.elf | cddd6f52e | important |
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### Fixed
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| Index | Severity | Update | Issue description | Issue source |
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| ----- | --------- | --------------------------------------------------------- | ------------------------------------------------------------ | ------------ |
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| 1 | important | fix the suspend/resume stability problem, the PCIE suspend fail. | Linux kernel doesn't save/restore GICR, so we need do it if vdd_logic is off in suspend. | - |
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## rk356{x_usbplug, 8_miniloader_spinand}_v1.15.bin
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| Date | File | Build commit | Severity |
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| ---------- | :----------------------------------------------- | ------------ | -------- |
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| 2022-09-26 | rk356{x_usbplug, 8_miniloader_spinand}_v1.15.bin | 65048d1 | moderate |
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### New
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1. Support more spiflash
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------
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## rk3568_bl32_v2.09.bin
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| Date | File | Build commit | Severity |
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| ---------- | :-------------------- | ------------ | --------- |
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| 2022-09-16 | rk3568_bl32_v2.09.bin | d84087907 | important |
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### Fixed
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| Index | Severity | Update | Issue description | Issue source |
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| ----- | --------- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------ |
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| 1 | important | Solve the problem that OPTEE is stuck during startup when printing is closed | User use /rkbin/tools/ddrbin_tool to close printing , then rk_atags will notify OPTEE to disable printing, When OPTEE starts, it will be stuck and unable to enter U-Boot | - |
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## rk3568_ddr_{1560...324}MHz_v1.14.bin
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| Date | File | Build commit | Severity |
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| ---------- | :----------------------------------- | ------------ | --------- |
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| 2022-08-27 | rk3568_ddr_{1560...324}MHz_v1.14.bin | b1f29a2a6f | important |
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### Fixed
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| Index | Severity | Update | Issue description | Issue source |
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| ----- | --------- | --------------------------------------------------------- | ------------------------------------------------------------ | ------------ |
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| 1 | important | fix some LPDDR4 stability problem | CXMT CXDB5CCAM-MK instability for 1560MHz at LPDDR4 mode. Fix this issue by set CLK/CA slew rate from 0xf to 0x0 . | - |
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| 2 | moderate | fix Fix set of t_xs_x32, t_xs_abort_x32 and t_xs_fast_x32 | Fix set of t_xs_x32, t_xs_abort_x32 and t_xs_fast_x32.This bug may lead to some low density dram(128M) fail. | - |
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| 3 | important | fix ddr4 528M stability problem | some DRAM DLL can't lock at 528M，DLL should be bypass for 528M | - |
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| | important | fix ddr4 1560M stability problem | some 2 rank DDR4 PCB DQS/DQ slew rate should be set to 0x0 when running at1560MHz. | - |
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