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# RK3566 Release Note
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## rk356x_spl_v1.13.bin
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| Date | File | Build commit | Severity |
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| ---------- | -------------------- | ------------ | --------- |
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| 2023-09-25 | rk356x_spl_v1.13.bin | e4e124926e | important |
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### New
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1. Print and pass the firmware version number.
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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 issue that the backup image is not loaded when the SPL load or check u-boot.dtb fails | When u-boot.dtb of the first uboot.img is corrupted, SPL doesn't load the backup image. | - |
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## rk3566_ddr_{1056...920}MHz_v1.18.bin
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| Date | File | Build commit | Severity |
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| ---------- | ------------------------------------ | ------------ | --------- |
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| 2023-07-17 | rk3566_ddr_{1056...920}MHz_v1.18.bin | f366f69a7d | 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 | Fixed the suspend/resume function crash problem caused by DDR active_ranks configuration error | Suspend/resume function crash | - |
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## rk3566_ddr_{1056...324}MHz_v1.17.bin
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| Date | File | Build commit | Severity |
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| ---------- | ------------------------------------ | ------------ | --------- |
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| 2023-06-20 | rk3566_ddr_{1056...324}MHz_v1.17.bin | 992b933606 | important |
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### New
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1. Added support for 4rank LPDDR3/LPDDR4/LPDDR4x of different rows.
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2. Enable derate function for LPDDR4/LPDDR4x.
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## rk3566_ddr_1056MHz_eyescan_v1.16.bin
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| Date | File | Build commit | Severity |
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| ---------- | :----------------------------------- | ------------ | --------- |
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| 2023-04-19 | rk3566_ddr_1056MHz_eyescan_v1.16.bin | b9c108a4eb | important |
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### New
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1. Add RK3566 2D eye scan support.
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## rk3566_ddr_{1056...324}MHz_v1.16.bin
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| Date | File | Build commit | Severity |
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| ---------- | ------------------------------------ | ------------ | --------- |
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| 2022-11-16 | rk3566_ddr_{1056...324}MHz_v1.16.bin | 6f71c736ce | important |
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### New
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1. RK3568J/RK3568M use 1/2tREFI except LPDDR4/LPDDR4x. LPDDR4/LPDDR4x use derate mode.
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2. TREFI, pageclose configurable by ddrbin tool.
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3. Improve DDR4 performance.
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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 ddr4 when DDR run in 528MHz. | When DDR4 run in 528MHz, the system would unstable, causing a crash and restart | - |
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| 2 | important | To solve 4GB ECC board Init fail bug | 4GB DDR4 board may crash in ddrbin | |
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## rk3566_ddr_{1056...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 | rk3566_ddr_{1056...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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## rk3566_ddr_{1056...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 | rk3566_ddr_{1056...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 | 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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| 2 | important | fix ddr4 528M stability problem | some DRAM DLL can't lock at 528M，DLL should be bypass for 528M | - |
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