topic NXP IMX8M PLUS with LPDDR4 Kernel panic.... in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/NXP-IMX8M-PLUS-with-LPDDR4-Kernel-panic/m-p/1530892#M195848 <P>Hello Nxp,</P><P>I have imx8mp EVK with LPDDR4 6 GB ram.&nbsp;</P><P>I have generate lpddr_timing.c file with IMX8MP EVK with below configuration in their sheet.</P><P><STRONG>Device Information</STRONG><BR />Memory type:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; LPDDR4<BR />Manufacturer:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Micron<BR />Memory part number:<STRONG>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;MT53E1536M32D4DT-046 WT:A</STRONG><BR />Density per channel per chip select (Gb)1:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<STRONG>3</STRONG><BR />Number of Channels<STRONG>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2</STRONG><BR />Number of Chip Selects used2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2<BR />Total DRAM density (Gb)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<STRONG>6</STRONG><BR />Number of ROW Addresses2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<STRONG>15</STRONG><BR />Number of COLUMN Addresses2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<STRONG>10</STRONG><BR />Number of BANK addresses2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<STRONG>3</STRONG><BR />Number of BANKS2<STRONG>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;8</STRONG><BR />Bus Width&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;32<BR />Clock Cycle Freq (MHz)3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2000<BR />Clock Cycle Time (ns)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.5<BR />FREQ1 setpoint Clock Cycle Freq (MHz)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 200<BR />FREQ1 Clock Cycle Time (ns)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;5<BR />FREQ2 setpoint Clock Cycle Freq (MHz)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 50<BR />FREQ2 Clock Cycle Time (ns)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;20</P><P>&nbsp;</P><P>DDR STRESS TOOL PASS.</P><P>but after that replace lpddr_timing.c file building the source code and flashing in to EVK bootloader is working but kernel is panic.</P><P>why above configuration is not working. any thing is missing?&nbsp;</P><P>After DDR stress tool pass any modification required in kernel ?</P><P>I need suggestion from nxp.</P><P>&nbsp;</P><P><STRONG>KERNEL LOG:</STRONG></P><P>Starting kernel ...</P><P>[ 0.000000][ T0] Booting Linux on physical CPU 0x0000000000 [0x410fd034]<BR />[ 0.000000][ T0] Linux version 5.10.72-g04acc13ba856-dirty (dev1@simpli-aosp-1) (Android (7284624, based on r416183b) clang version 12.0.5 (<A href="https://android.googlesource.com/toolchain/llvm-project" target="_blank">https://android.googlesource.com/toolchain/llvm-project</A> c935d99d7cf2016289302412d708641d52d2f7ee), LLD 12.0.5 (/buildbot/src/android/llvm-toolchain/out/llvm-project/lld c935d99d7cf2016289302412d708641d52d2f7ee)) #1 SMP PREEMPT Fri Sep 23 12:13:06 IST 2022<BR />[ 0.000000][ T0] Machine model: NXP i.MX8MPlus EVK board<BR />[ 0.000000][ T0] Stack Depot is disabled<BR />[ 0.000000][ T0] earlycon: ec_imx6q0 at MMIO 0x0000000030890000 (options '115200')<BR />[ 0.000000][ T0] printk: bootconsole [ec_imx6q0] enabled<BR />[ 0.000000][ T0] efi: UEFI not found.<BR />[ 0.000000][ T0] Reserved memory: created DMA memory pool at 0x0000000094300000, size 1 MiB<BR />[ 0.000000][ T0] OF: reserved mem: initialized node vdev0buffer@94300000, compatible id shared-dma-pool<BR />[ 0.000000][ T0] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP<BR />[ 0.000000][ T0] Modules linked in:<BR />[ 0.000000][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.72-g04acc13ba856-dirty #1<BR />[ 0.000000][ T0] Hardware name: NXP i.MX8MPlus EVK board (DT)<BR />[ 0.000000][ T0] pstate: 60400085 (nZCv daIf +PAN -UAO -TCO BTYPE=--)<BR />[ 0.000000][ T0] pc : __create_pgd_mapping+0x470/0x878<BR />[ 0.000000][ T0] lr : 0x40600000<BR />[ 0.000000][ T0] sp : ffffffc011a63d70<BR />[ 0.000000][ T0] x29: ffffffc011a63e70 x28: 0050000000000783<BR />[ 0.000000][ T0] x27: ffffffc010000000 x26: fffffffefe438800<BR />[ 0.000000][ T0] x25: 0068000000000703 x24: ffd7fffffffff77f<BR />[ 0.000000][ T0] x23: fffffffefe43a400 x22: ffffffc011c46000<BR />[ 0.000000][ T0] x21: 0000000000000041 x20: 0040000000000783<BR />[ 0.000000][ T0] x19: 0000000000000000 x18: ffffffc011a7be70<BR />[ 0.000000][ T0] x17: 0000000000000005 x16: 00000000f0000000<BR />[ 0.000000][ T0] x15: 00000001bffff000 x14: 0000000010000000<BR />[ 0.000000][ T0] x13: ffffffc010f9ffff x12: ffffffc011ffffff<BR />[ 0.000000][ T0] x11: 0000000000000000 x10: 0000000000000800<BR />[ 0.000000][ T0] x9 : ffffffc010200000 x8 : 0000000000000000<BR />[ 0.000000][ T0] x7 : 0040000000000780 x6 : ffffffc010f9ffff<BR />[ 0.000000][ T0] x5 : 00000fffffefe43b x4 : fffffffefe43a000<BR />[ 0.000000][ T0] x3 : ffffffc011c47000 x2 : ffffffc011c47000<BR />[ 0.000000][ T0] x1 : ffffffc010fa0000 x0 : 00000001bffff000<BR />[ 0.000000][ T0] Call trace:<BR />[ 0.000000][ T0] __create_pgd_mapping+0x470/0x878<BR />[ 0.000000][ T0] map_kernel_segment+0x6c/0xe4<BR />[ 0.000000][ T0] map_kernel+0x88/0x1d0<BR />[ 0.000000][ T0] paging_init+0x70/0xec<BR />[ 0.000000][ T0] setup_arch+0x140/0x238<BR />[ 0.000000][ T0] start_kernel+0x74/0x480<BR />[ 0.000000][ T0] Code: 910022f7 aa1a03fb 54001ac0 91480369 (f94002e8)<BR />[ 0.000000][ T0] random: get_random_bytes called from oops_exit+0x38/0x70 with crng_init=0<BR />[ 0.000000][ T0] ---[ end trace 0000000000000000 ]---<BR />[ 0.000000][ T0<STRONG>] Kernel panic - not syncing: synchronous external abort: Fatal exception</STRONG><BR />[ 0.000000][ T0] Reboot failed -- System halted</P><P>&nbsp;</P> Fri, 30 Sep 2022 05:54:28 GMT Aditya2125 2022-09-30T05:54:28Z NXP IMX8M PLUS with LPDDR4 Kernel panic.... https://community.nxp.com/t5/i-MX-Processors/NXP-IMX8M-PLUS-with-LPDDR4-Kernel-panic/m-p/1530892#M195848 <P>Hello Nxp,</P><P>I have imx8mp EVK with LPDDR4 6 GB ram.&nbsp;</P><P>I have generate lpddr_timing.c file with IMX8MP EVK with below configuration in their sheet.</P><P><STRONG>Device Information</STRONG><BR />Memory type:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; LPDDR4<BR />Manufacturer:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Micron<BR />Memory part number:<STRONG>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;MT53E1536M32D4DT-046 WT:A</STRONG><BR />Density per channel per chip select (Gb)1:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<STRONG>3</STRONG><BR />Number of Channels<STRONG>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2</STRONG><BR />Number of Chip Selects used2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2<BR />Total DRAM density (Gb)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<STRONG>6</STRONG><BR />Number of ROW Addresses2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<STRONG>15</STRONG><BR />Number of COLUMN Addresses2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<STRONG>10</STRONG><BR />Number of BANK addresses2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<STRONG>3</STRONG><BR />Number of BANKS2<STRONG>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;8</STRONG><BR />Bus Width&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;32<BR />Clock Cycle Freq (MHz)3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;2000<BR />Clock Cycle Time (ns)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.5<BR />FREQ1 setpoint Clock Cycle Freq (MHz)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 200<BR />FREQ1 Clock Cycle Time (ns)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;5<BR />FREQ2 setpoint Clock Cycle Freq (MHz)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 50<BR />FREQ2 Clock Cycle Time (ns)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;20</P><P>&nbsp;</P><P>DDR STRESS TOOL PASS.</P><P>but after that replace lpddr_timing.c file building the source code and flashing in to EVK bootloader is working but kernel is panic.</P><P>why above configuration is not working. any thing is missing?&nbsp;</P><P>After DDR stress tool pass any modification required in kernel ?</P><P>I need suggestion from nxp.</P><P>&nbsp;</P><P><STRONG>KERNEL LOG:</STRONG></P><P>Starting kernel ...</P><P>[ 0.000000][ T0] Booting Linux on physical CPU 0x0000000000 [0x410fd034]<BR />[ 0.000000][ T0] Linux version 5.10.72-g04acc13ba856-dirty (dev1@simpli-aosp-1) (Android (7284624, based on r416183b) clang version 12.0.5 (<A href="https://android.googlesource.com/toolchain/llvm-project" target="_blank">https://android.googlesource.com/toolchain/llvm-project</A> c935d99d7cf2016289302412d708641d52d2f7ee), LLD 12.0.5 (/buildbot/src/android/llvm-toolchain/out/llvm-project/lld c935d99d7cf2016289302412d708641d52d2f7ee)) #1 SMP PREEMPT Fri Sep 23 12:13:06 IST 2022<BR />[ 0.000000][ T0] Machine model: NXP i.MX8MPlus EVK board<BR />[ 0.000000][ T0] Stack Depot is disabled<BR />[ 0.000000][ T0] earlycon: ec_imx6q0 at MMIO 0x0000000030890000 (options '115200')<BR />[ 0.000000][ T0] printk: bootconsole [ec_imx6q0] enabled<BR />[ 0.000000][ T0] efi: UEFI not found.<BR />[ 0.000000][ T0] Reserved memory: created DMA memory pool at 0x0000000094300000, size 1 MiB<BR />[ 0.000000][ T0] OF: reserved mem: initialized node vdev0buffer@94300000, compatible id shared-dma-pool<BR />[ 0.000000][ T0] Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP<BR />[ 0.000000][ T0] Modules linked in:<BR />[ 0.000000][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.72-g04acc13ba856-dirty #1<BR />[ 0.000000][ T0] Hardware name: NXP i.MX8MPlus EVK board (DT)<BR />[ 0.000000][ T0] pstate: 60400085 (nZCv daIf +PAN -UAO -TCO BTYPE=--)<BR />[ 0.000000][ T0] pc : __create_pgd_mapping+0x470/0x878<BR />[ 0.000000][ T0] lr : 0x40600000<BR />[ 0.000000][ T0] sp : ffffffc011a63d70<BR />[ 0.000000][ T0] x29: ffffffc011a63e70 x28: 0050000000000783<BR />[ 0.000000][ T0] x27: ffffffc010000000 x26: fffffffefe438800<BR />[ 0.000000][ T0] x25: 0068000000000703 x24: ffd7fffffffff77f<BR />[ 0.000000][ T0] x23: fffffffefe43a400 x22: ffffffc011c46000<BR />[ 0.000000][ T0] x21: 0000000000000041 x20: 0040000000000783<BR />[ 0.000000][ T0] x19: 0000000000000000 x18: ffffffc011a7be70<BR />[ 0.000000][ T0] x17: 0000000000000005 x16: 00000000f0000000<BR />[ 0.000000][ T0] x15: 00000001bffff000 x14: 0000000010000000<BR />[ 0.000000][ T0] x13: ffffffc010f9ffff x12: ffffffc011ffffff<BR />[ 0.000000][ T0] x11: 0000000000000000 x10: 0000000000000800<BR />[ 0.000000][ T0] x9 : ffffffc010200000 x8 : 0000000000000000<BR />[ 0.000000][ T0] x7 : 0040000000000780 x6 : ffffffc010f9ffff<BR />[ 0.000000][ T0] x5 : 00000fffffefe43b x4 : fffffffefe43a000<BR />[ 0.000000][ T0] x3 : ffffffc011c47000 x2 : ffffffc011c47000<BR />[ 0.000000][ T0] x1 : ffffffc010fa0000 x0 : 00000001bffff000<BR />[ 0.000000][ T0] Call trace:<BR />[ 0.000000][ T0] __create_pgd_mapping+0x470/0x878<BR />[ 0.000000][ T0] map_kernel_segment+0x6c/0xe4<BR />[ 0.000000][ T0] map_kernel+0x88/0x1d0<BR />[ 0.000000][ T0] paging_init+0x70/0xec<BR />[ 0.000000][ T0] setup_arch+0x140/0x238<BR />[ 0.000000][ T0] start_kernel+0x74/0x480<BR />[ 0.000000][ T0] Code: 910022f7 aa1a03fb 54001ac0 91480369 (f94002e8)<BR />[ 0.000000][ T0] random: get_random_bytes called from oops_exit+0x38/0x70 with crng_init=0<BR />[ 0.000000][ T0] ---[ end trace 0000000000000000 ]---<BR />[ 0.000000][ T0<STRONG>] Kernel panic - not syncing: synchronous external abort: Fatal exception</STRONG><BR />[ 0.000000][ T0] Reboot failed -- System halted</P><P>&nbsp;</P> Fri, 30 Sep 2022 05:54:28 GMT https://community.nxp.com/t5/i-MX-Processors/NXP-IMX8M-PLUS-with-LPDDR4-Kernel-panic/m-p/1530892#M195848 Aditya2125 2022-09-30T05:54:28Z