Thanks to Christophe. I have figured out what happened. The connector is registered before the device, where drm_connector_register() states that, drm_dev_register() has to be called before it. Assuming this is the fix, I will send the patch for testing soon. On Tue, Oct 1, 2024 at 8:23 PM Christophe Leroy <christophe.leroy@xxxxxxxxxx> wrote: > > Hi All, > > Le 01/10/2024 à 14:09, Hoi Pok Wu a écrit : > > [Vous ne recevez pas souvent de courriers de wuhoipok@xxxxxxxxx. Découvrez pourquoi ceci est important à https://aka.ms/LearnAboutSenderIdentification ] > > > > Hi Thomas, > > > > Could you help on this issue? > > I do not have access to the hardware now. > > Thank you. > > The OOPS is from function drm_dp_aux_register(), exactly here below: > > static inline const char *dev_name(const struct device *dev) > { > /* Use the init name until the kobject becomes available */ > if (dev->init_name) > > 1ae0: e8 89 00 50 ld r4,80(r9) > > > As you see in registers dump, r9 register is NULL. That's dev which is NULL: > > GPR00: c0000000005b74f0 c0000000800daf10 c0000000015a3600 c00000008033f7ec > GPR04: 0000000000000000 c000000001908f18 c000000080460c80 ffffffffc0c0c0c0 > GPR08: c000000080f74008 0000000000000000 0000000000000003 c000000080f74008 > GPR12: 0000000048000828 c00000003fffeac0 0000000000000003 0000000001000000 > GPR16: c0000000804eaeca 0000000000000013 0000000000003113 0000000000000000 > GPR20: 0000000000000008 c0000000800db208 000000000000000a c0000000014d6868 > GPR24: 0000000000000000 0000000000000001 c0000000800db29c c0000000800db250 > GPR28: c000000080bd8040 0000000000000001 c000000080f74000 c00000008033f4a0 > > Full dump below: > > 0000000000001a5c <drm_dp_aux_register>: > { > 1a5c: 3c 4c 00 00 addis r2,r12,0 > 1a5e: R_PPC64_REL16_HA .TOC.+0x2 > 1a60: 38 42 00 00 addi r2,r2,0 > 1a62: R_PPC64_REL16_LO .TOC.+0x6 > 1a64: 7c 08 02 a6 mflr r0 > 1a68: fb e1 ff f8 std r31,-8(r1) > 1a6c: f8 01 00 10 std r0,16(r1) > 1a70: 7c 7f 1b 78 mr r31,r3 > 1a74: f8 21 ff d1 stdu r1,-48(r1) > WARN_ON_ONCE(!aux->drm_dev); > 1a78: e9 23 03 38 ld r9,824(r3) > 1a7c: 2f a9 00 00 cmpdi cr7,r9,0 > 1a80: 41 de 00 90 beq- cr7,1b10 <drm_dp_aux_register+0xb4> > if (!aux->ddc.algo) > 1a84: e9 3f 00 18 ld r9,24(r31) > 1a88: 2f a9 00 00 cmpdi cr7,r9,0 > 1a8c: 41 de 00 74 beq- cr7,1b00 <drm_dp_aux_register+0xa4> > strscpy(aux->ddc.name, aux->name ? aux->name : dev_name(aux->dev), > 1a90: e8 9f 00 00 ld r4,0(r31) > aux->ddc.owner = THIS_MODULE; > 1a94: 39 40 00 00 li r10,0 > aux->ddc.dev.parent = aux->dev; > 1a98: e9 3f 03 30 ld r9,816(r31) > strscpy(aux->ddc.name, aux->name ? aux->name : dev_name(aux->dev), > 1a9c: 38 7f 02 74 addi r3,r31,628 > aux->ddc.owner = THIS_MODULE; > 1aa0: f9 5f 00 08 std r10,8(r31) > strscpy(aux->ddc.name, aux->name ? aux->name : dev_name(aux->dev), > 1aa4: 2f a4 00 00 cmpdi cr7,r4,0 > aux->ddc.dev.parent = aux->dev; > 1aa8: f9 3f 00 b8 std r9,184(r31) > strscpy(aux->ddc.name, aux->name ? aux->name : dev_name(aux->dev), > 1aac: 41 de 00 34 beq- cr7,1ae0 <drm_dp_aux_register+0x84> > 1ab0: 38 a0 00 30 li r5,48 > 1ab4: 48 00 00 01 bl 1ab4 <drm_dp_aux_register+0x58> > 1ab4: R_PPC64_REL24 sized_strscpy > 1ab8: 60 00 00 00 nop > ret = i2c_add_adapter(&aux->ddc); > 1abc: 38 7f 00 08 addi r3,r31,8 > 1ac0: 48 00 00 01 bl 1ac0 <drm_dp_aux_register+0x64> > 1ac0: R_PPC64_REL24 i2c_add_adapter > 1ac4: 60 00 00 00 nop > } > 1ac8: 38 21 00 30 addi r1,r1,48 > 1acc: e8 01 00 10 ld r0,16(r1) > 1ad0: eb e1 ff f8 ld r31,-8(r1) > 1ad4: 7c 08 03 a6 mtlr r0 > 1ad8: 4e 80 00 20 blr > 1adc: 60 00 00 00 nop > * Return: The kobject name of the device, or its initial name if > unavailable. > */ > static inline const char *dev_name(const struct device *dev) > { > /* Use the init name until the kobject becomes available */ > if (dev->init_name) > 1ae0: e8 89 00 50 ld r4,80(r9) > 1ae4: 2f a4 00 00 cmpdi cr7,r4,0 > 1ae8: 40 fe ff c8 bne+ cr7,1ab0 <drm_dp_aux_register+0x54> > return dev->init_name; > > return kobject_name(&dev->kobj); > 1aec: e8 89 00 00 ld r4,0(r9) > 1af0: 4b ff ff c0 b 1ab0 <drm_dp_aux_register+0x54> > 1af4: 60 00 00 00 nop > 1af8: 60 00 00 00 nop > 1afc: 60 00 00 00 nop > drm_dp_aux_init(aux); > 1b00: 7f e3 fb 78 mr r3,r31 > 1b04: 48 00 00 01 bl 1b04 <drm_dp_aux_register+0xa8> > 1b04: R_PPC64_REL24 drm_dp_aux_init > 1b08: 4b ff ff 88 b 1a90 <drm_dp_aux_register+0x34> > 1b0c: 60 00 00 00 nop > WARN_ON_ONCE(!aux->drm_dev); > 1b10: 0f e0 00 00 twui r0,0 > 1b14: 4b ff ff 70 b 1a84 <drm_dp_aux_register+0x28> > > > > > > > Regards, > > Wu Hoi Pok > > > > > > On Tue, Oct 1, 2024 at 12:26 PM Christian Zigotzky > > <chzigotzky@xxxxxxxxxxx> wrote: > >> > >> On 30 September 2024 3:27pm, Alex Deucher <alexdeucher@xxxxxxxxx> wrote: > >> > >> + Wu Hoi Pok > >> > >> This is likely related to the drm device rework. > >> > >> Alex > >> > >> —————- > >> > >> Hi All, > >> > >> I was able to revert the drm-next-2024-09-19 updates for the RC1 of kernel 6.12. > >> > >> This kernel works on all machines without any problems. > >> > >> This means, the new Radeon DRM driver is unreliable after the DRM rework. > >> > >> Please fix this issue because we can’t deliver the kernels with the new Radeon DRM driver. > >> > >> Error log: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.xenosoft.de%2FPuTTY_P5040_U-Boot.log&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C9b40f906e2f2493cb25908dce211ee23%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638633814783011669%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C60000%7C%7C%7C&sdata=fgAj0osIOyJtNrzUKp%2Bpq0NN1sGW2bqGm8nXYj88Ne0%3D&reserved=0 > >> > >> Thanks, > >> Christian
