DRM MSM on recent *mainline* kernels (5.4+)

[doitright]

@Loic @robclark : I’m trying to get a db820c running on a recent 5.4 or 5.5rc kernel, and I seem to have it working, more or less, except for the graphics.

• I’m trying both using Linaro/Debian and AOSP master.
• I’ve tried android common kernel, mainline, and msm-next.

I’m working blind, having very little understanding of how the pieces fit together.

This is the crash I’m seeing, which is the same from msm-next as well as 5.5rc6, I don’t know what it means or how to approach it. Help would be appreciated.

For clarity, the log below is NOT from 4.14.0, that’s just set with the KERNELRELEASE variable.

[   25.980419] adreno b00000.gpu: Adding to iommu group 0
[   25.982417] msm_mdp 901000.mdp: Adding to iommu group 1
[   25.984646] msm_mdp 901000.mdp: No interconnect support may cause display underflows!
[   25.993566] msm 900000.mdss: 900000.mdss supply vdd not found, using dummy regulator
[   25.998197] msm_mdp 901000.mdp: [drm:mdp5_bind] MDP5 version v1.7
[   26.005477] msm 900000.mdss: bound 901000.mdp (ops mdp5_ops)
[   26.012463] msm 900000.mdss: bound 9a0000.hdmi-tx (ops msm_hdmi_ops)
[   26.017217] ------------[ cut here ]------------
[   26.023421] WARNING: CPU: 0 PID: 1 at drivers/opp/of.c:688 _of_add_opp_table_v2.part.8+0x49c/0x570
[   26.028015] Modules linked in:
[   26.036781] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.14.0-qcomlt-arm64 #1
[   26.039819] Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
[   26.047024] pstate: 20000005 (nzCv daif -PAN -UAO)
[   26.053011] pc : _of_add_opp_table_v2.part.8+0x49c/0x570
[   26.057786] lr : _of_add_opp_table_v2.part.8+0x288/0x570
[   26.063252] sp : ffff80001003b730
[   26.068548] x29: ffff80001003b730 x28: ffff0000f716c000
[   26.071760] x27: fffffffffffffdfb x26: 0000000000000004
[   26.077142] x25: ffff0000f716b000 x24: ffff0000f8881810
[   26.082437] x23: ffff0000f713b000 x22: 0000000000000000
[   26.087732] x21: ffff800011c1e0f8 x20: ffff0000f713b000
[   26.093026] x19: ffff0000f713ac00 x18: ffffffffffffffff
[   26.098322] x17: 0000000000000001 x16: 0000000000000000
[   26.103618] x15: ffff8000119c98c8 x14: ffffffffffffffff
[   26.108912] x13: 0000000000000028 x12: 0000000000000030
[   26.114208] x11: 0000000000000028 x10: 0101010101010101
[   26.119502] x9 : 0000000000000003 x8 : 7f7f7f7f7f7f7f7f
[   26.124797] x7 : ffff0000fd0a0000 x6 : 00000000003b0d00
[   26.130092] x5 : ffff0000fdcb0740 x4 : 0000000000000000
[   26.135389] x3 : 0000000000000002 x2 : 0000000000000000
[   26.140683] x1 : ffff0000fd0a0000 x0 : 0000000000000000
[   26.145980] Call trace:
[   26.151277]  _of_add_opp_table_v2.part.8+0x49c/0x570
[   26.153446]  dev_pm_opp_of_add_table+0x44/0x1f0
[   26.158656]  adreno_gpu_init+0xc8/0x2d8
[   26.162907]  a5xx_gpu_init+0xf8/0x1c8
[   26.166724]  adreno_bind+0x1c8/0x290
[   26.170547]  component_bind_all+0xf8/0x288
[   26.174193]  msm_drm_bind+0x100/0x620
[   26.178097]  try_to_bring_up_master+0x178/0x1d8
[   26.181829]  component_master_add_with_match+0xb0/0x100
[   26.186172]  msm_pdev_probe+0x268/0x330
[   26.191380]  platform_drv_probe+0x50/0xa0
[   26.195198]  really_probe+0x108/0x348
[   26.199362]  driver_probe_device+0x58/0x100
[   26.203011]  device_driver_attach+0x6c/0x90
[   26.207001]  __driver_attach+0x84/0xc8
[   26.211173]  bus_for_each_dev+0x74/0xc8
[   26.214990]  driver_attach+0x20/0x28
[   26.218721]  bus_add_driver+0x148/0x1f0
[   26.222541]  driver_register+0x60/0x110
[   26.226099]  __platform_driver_register+0x40/0x48
[   26.229926]  msm_drm_register+0x50/0x64
[   26.234783]  do_one_initcall+0x5c/0x1b0
[   26.238430]  kernel_init_freeable+0x1a0/0x214
[   26.242250]  kernel_init+0x10/0x108
[   26.246760]  ret_from_fork+0x10/0x18
[   26.250064] ---[ end trace b72e1718b76e5ec9 ]---
[   26.253958] adreno b00000.gpu: [drm:adreno_gpu_init] *ERROR* Unable to set the OPP table
[   26.258518] adreno b00000.gpu: Could not find a clock rate. Using a reasonable default
[   26.266832] adreno b00000.gpu: b00000.gpu supply vdd not found, using dummy regulator
[   26.274393] adreno b00000.gpu: b00000.gpu supply vddcx not found, using dummy regulator
[   26.282256] adreno b00000.gpu: [drm:msm_gpu_init] *ERROR* Couldn't initialize GPU devfreq
[   26.290020] msm 900000.mdss: [drm:msm_gpu_init] A530: using IOMMU
[   26.299993] msm 900000.mdss: bound b00000.gpu (ops a3xx_ops)
[   26.428661] msm_mdp 901000.mdp: [drm:mdp5_kms_init] *ERROR* modeset_init failed: -16
[   26.429210] msm 900000.mdss: [drm:msm_drm_bind] *ERROR* failed to load kms
[   26.435562] ------------[ cut here ]------------
[   26.442146] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_gem.c:1037 drm_gem_object_put+0x84/0xa0
[   26.446915] Modules linked in:
[   26.455681] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.14.0-qcomlt-arm64 #1
[   26.458635] Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
[   26.467227] pstate: 40000005 (nZcv daif -PAN -UAO)
[   26.473214] pc : drm_gem_object_put+0x84/0xa0
[   26.477988] lr : drm_gem_object_put+0x20/0xa0
[   26.482413] sp : ffff80001003b870
[   26.486754] x29: ffff80001003b870 x28: ffff0000f716c000
[   26.490053] x27: 0000000000000000 x26: ffff80001147e9d8
[   26.495435] x25: ffff0000f7110a80 x24: 0000000000000000
[   26.500731] x23: ffff0000f710f3a0 x22: ffff0000f716b000
[   26.506025] x21: 0000000000000001 x20: ffff0000f712ee00
[   26.511320] x19: ffff0000f712fa00 x18: 0000000000000004
[   26.516615] x17: 0000000000000001 x16: 0000000000000000
[   26.521911] x15: ffff0000f716b1f8 x14: ffff0000f8e1c7f0
[   26.527206] x13: 0000000000000000 x12: ffff0000f716b1f8
[   26.532501] x11: ffff0000f8e1c6d8 x10: 0000000000000000
[   26.537796] x9 : ffff8000119c98c8 x8 : ffff800011c1e000
[   26.543091] x7 : 0000000000000000 x6 : 000000002525086d
[   26.548387] x5 : 00ffffffffffffff x4 : ffff0000fd0a0000
[   26.553681] x3 : ffff0000f712fba8 x2 : 0000000000000000
[   26.558977] x1 : 0000000000000000 x0 : 0000000000000000
[   26.564274] Call trace:
[   26.569567]  drm_gem_object_put+0x84/0xa0
[   26.571740]  msm_gem_kernel_put+0x5c/0x70
[   26.575908]  a5xx_preempt_fini+0x3c/0x60
[   26.579897]  a5xx_destroy+0x2c/0x90
[   26.583890]  adreno_unbind+0x28/0x40
[   26.587104]  component_unbind.isra.9+0x2c/0x50
[   26.590922]  component_unbind_all+0xd0/0xf8
[   26.595176]  msm_drm_uninit+0x10c/0x190
[   26.599254]  msm_drm_bind+0x1dc/0x620
[   26.603074]  try_to_bring_up_master+0x178/0x1d8
[   26.606895]  component_master_add_with_match+0xb0/0x100
[   26.611236]  msm_pdev_probe+0x268/0x330
[   26.616445]  platform_drv_probe+0x50/0xa0
[   26.620262]  really_probe+0x108/0x348
[   26.624427]  driver_probe_device+0x58/0x100
[   26.628074]  device_driver_attach+0x6c/0x90
[   26.632067]  __driver_attach+0x84/0xc8
[   26.636235]  bus_for_each_dev+0x74/0xc8
[   26.640055]  driver_attach+0x20/0x28
[   26.643787]  bus_add_driver+0x148/0x1f0
[   26.647604]  driver_register+0x60/0x110
[   26.651163]  __platform_driver_register+0x40/0x48
[   26.654990]  msm_drm_register+0x50/0x64
[   26.659847]  do_one_initcall+0x5c/0x1b0
[   26.663494]  kernel_init_freeable+0x1a0/0x214
[   26.667314]  kernel_init+0x10/0x108
[   26.671825]  ret_from_fork+0x10/0x18
[   26.675124] ---[ end trace b72e1718b76e5eca ]---
[   26.679053] ------------[ cut here ]------------
[   26.683550] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_gem.c:1037 drm_gem_object_put+0x84/0xa0
[   26.688148] Modules linked in:
[   26.696911] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.14.0-qcomlt-arm64 #1
[   26.699866] Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
[   26.708459] pstate: 40000005 (nZcv daif -PAN -UAO)
[   26.714447] pc : drm_gem_object_put+0x84/0xa0
[   26.719222] lr : drm_gem_object_put+0x20/0xa0
[   26.723647] sp : ffff80001003b870
[   26.727986] x29: ffff80001003b870 x28: ffff0000f716c000
[   26.731287] x27: 0000000000000000 x26: ffff80001147e9d8
[   26.736669] x25: ffff0000f7110a80 x24: 0000000000000000
[   26.741964] x23: ffff0000f710f3a0 x22: ffff0000f716b000
[   26.747259] x21: 0000000000000001 x20: ffff0000f712ee00
[   26.752555] x19: ffff0000f712fc00 x18: 0000000000000004
[   26.757849] x17: 0000000000000001 x16: 0000000000000000
[   26.763145] x15: ffff0000f716b1f8 x14: ffff0000f8e1c7f0
[   26.768439] x13: 0000000000000000 x12: ffff0000f716b1f8
[   26.773735] x11: ffff0000f8e1c6d8 x10: 0000000000000000
[   26.779030] x9 : ffff8000119c98c8 x8 : ffff800011c1e000
[   26.784325] x7 : 0000000000000000 x6 : ffff0000f8944638
[   26.789621] x5 : ffff0000f8944638 x4 : ffff0000fd0a0000
[   26.794916] x3 : ffff0000f712fda8 x2 : 0000000000000000
[   26.800211] x1 : 0000000000000000 x0 : 0000000000000000
[   26.805505] Call trace:
[   26.810800]  drm_gem_object_put+0x84/0xa0
[   26.812972]  msm_gem_kernel_put+0x5c/0x70
[   26.817138]  a5xx_preempt_fini+0x3c/0x60
[   26.821130]  a5xx_destroy+0x2c/0x90
[   26.825123]  adreno_unbind+0x28/0x40
[   26.828335]  component_unbind.isra.9+0x2c/0x50
[   26.832154]  component_unbind_all+0xd0/0xf8
[   26.836409]  msm_drm_uninit+0x10c/0x190
[   26.840488]  msm_drm_bind+0x1dc/0x620
[   26.844307]  try_to_bring_up_master+0x178/0x1d8
[   26.848128]  component_master_add_with_match+0xb0/0x100
[   26.852469]  msm_pdev_probe+0x268/0x330
[   26.857675]  platform_drv_probe+0x50/0xa0
[   26.861495]  really_probe+0x108/0x348
[   26.865661]  driver_probe_device+0x58/0x100
[   26.869307]  device_driver_attach+0x6c/0x90
[   26.873300]  __driver_attach+0x84/0xc8
[   26.877468]  bus_for_each_dev+0x74/0xc8
[   26.881287]  driver_attach+0x20/0x28
[   26.885020]  bus_add_driver+0x148/0x1f0
[   26.888839]  driver_register+0x60/0x110
[   26.892396]  __platform_driver_register+0x40/0x48
[   26.896219]  msm_drm_register+0x50/0x64
[   26.901078]  do_one_initcall+0x5c/0x1b0
[   26.904725]  kernel_init_freeable+0x1a0/0x214
[   26.908543]  kernel_init+0x10/0x108
[   26.913057]  ret_from_fork+0x10/0x18
[   26.916355] ---[ end trace b72e1718b76e5ecb ]---
[   26.920243] ------------[ cut here ]------------
[   26.924781] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_gem.c:1037 drm_gem_object_put+0x84/0xa0
[   26.929381] Modules linked in:
[   26.938144] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.14.0-qcomlt-arm64 #1
[   26.941100] Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
[   26.949691] pstate: 40000005 (nZcv daif -PAN -UAO)
[   26.955680] pc : drm_gem_object_put+0x84/0xa0
[   26.960454] lr : drm_gem_object_put+0x20/0xa0
[   26.964880] sp : ffff80001003b870
[   26.969220] x29: ffff80001003b870 x28: ffff0000f716c000
[   26.972518] x27: 0000000000000000 x26: ffff80001147e9d8
[   26.977901] x25: ffff0000f7110a80 x24: 0000000000000000
[   26.983197] x23: ffff0000f710f3a0 x22: ffff0000f716b000
[   26.988492] x21: 0000000000000001 x20: ffff0000f712ee00
[   26.993786] x19: ffff0000f712fe00 x18: 0000000000000004
[   26.999082] x17: 0000000000000001 x16: 0000000000000000
[   27.004377] x15: ffff0000f716b1f8 x14: ffff0000f8e1c7f0
[   27.009673] x13: 0000000000000000 x12: ffff0000f716b1f8
[   27.014968] x11: ffff0000f8e1c6d8 x10: 0000000000000040
[   27.020262] x9 : ffff8000119df528 x8 : ffff8000119df520
[   27.025558] x7 : ffff0000f8c00068 x6 : ffff0000f8944638
[   27.030853] x5 : ffff0000f8944638 x4 : ffff0000fd0a0000
[   27.036148] x3 : ffff0000f712ffa8 x2 : 0000000000000000
[   27.041444] x1 : 0000000000000000 x0 : 0000000000000000
[   27.046738] Call trace:
[   27.052032]  drm_gem_object_put+0x84/0xa0
[   27.054206]  msm_gem_kernel_put+0x5c/0x70
[   27.058370]  a5xx_preempt_fini+0x3c/0x60
[   27.062362]  a5xx_destroy+0x2c/0x90
[   27.066355]  adreno_unbind+0x28/0x40
[   27.069567]  component_unbind.isra.9+0x2c/0x50
[   27.073388]  component_unbind_all+0xd0/0xf8
[   27.077640]  msm_drm_uninit+0x10c/0x190
[   27.081721]  msm_drm_bind+0x1dc/0x620
[   27.085541]  try_to_bring_up_master+0x178/0x1d8
[   27.089361]  component_master_add_with_match+0xb0/0x100
[   27.093701]  msm_pdev_probe+0x268/0x330
[   27.098908]  platform_drv_probe+0x50/0xa0
[   27.102727]  really_probe+0x108/0x348
[   27.106893]  driver_probe_device+0x58/0x100
[   27.110540]  device_driver_attach+0x6c/0x90
[   27.114533]  __driver_attach+0x84/0xc8
[   27.118701]  bus_for_each_dev+0x74/0xc8
[   27.122520]  driver_attach+0x20/0x28
[   27.126252]  bus_add_driver+0x148/0x1f0
[   27.130071]  driver_register+0x60/0x110
[   27.133630]  __platform_driver_register+0x40/0x48
[   27.137451]  msm_drm_register+0x50/0x64
[   27.142310]  do_one_initcall+0x5c/0x1b0
[   27.145957]  kernel_init_freeable+0x1a0/0x214
[   27.149777]  kernel_init+0x10/0x108
[   27.154290]  ret_from_fork+0x10/0x18
[   27.157587] ---[ end trace b72e1718b76e5ecc ]---
[   27.161498] ------------[ cut here ]------------
[   27.166013] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_gem.c:1037 drm_gem_object_put+0x84/0xa0
[   27.170613] Modules linked in:
[   27.179377] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         4.14.0-qcomlt-arm64 #1
[   27.182333] Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
[   27.190924] pstate: 40000005 (nZcv daif -PAN -UAO)
[   27.196913] pc : drm_gem_object_put+0x84/0xa0
[   27.201686] lr : drm_gem_object_put+0x20/0xa0
[   27.206112] sp : ffff80001003b870
[   27.210451] x29: ffff80001003b870 x28: ffff0000f716c000
[   27.213752] x27: 0000000000000000 x26: ffff80001147e9d8
[   27.219134] x25: ffff0000f7110a80 x24: 0000000000000000
[   27.224430] x23: ffff0000f710f3a0 x22: ffff0000f716b000
[   27.229725] x21: 0000000000000001 x20: ffff0000f712ee00
[   27.235020] x19: ffff0000f71ea000 x18: 0000000000000004
[   27.240314] x17: 0000000000000001 x16: 0000000000000000
[   27.245610] x15: ffff0000f716b1f8 x14: ffff0000f8e1c7f0
[   27.250905] x13: 0000000000000000 x12: ffff0000f716b1f8
[   27.256200] x11: ffff0000f8e1c6d8 x10: 0000000000000040
[   27.261495] x9 : ffff8000119df528 x8 : ffff8000119df520
[   27.266791] x7 : ffff0000f8c00068 x6 : ffff0000f8944638
[   27.272086] x5 : ffff0000f8944638 x4 : ffff0000fd0a0000
[   27.277380] x3 : ffff0000f71ea1a8 x2 : 0000000000000000
[   27.282676] x1 : 0000000000000000 x0 : 0000000000000000
[   27.287971] Call trace:
[   27.293264]  drm_gem_object_put+0x84/0xa0
[   27.295437]  msm_gem_kernel_put+0x5c/0x70
[   27.299604]  a5xx_preempt_fini+0x3c/0x60
[   27.303596]  a5xx_destroy+0x2c/0x90
[   27.307588]  adreno_unbind+0x28/0x40
[   27.310800]  component_unbind.isra.9+0x2c/0x50
[   27.314621]  component_unbind_all+0xd0/0xf8
[   27.318875]  msm_drm_uninit+0x10c/0x190
[   27.322953]  msm_drm_bind+0x1dc/0x620
[   27.326772]  try_to_bring_up_master+0x178/0x1d8
[   27.330593]  component_master_add_with_match+0xb0/0x100
[   27.334933]  msm_pdev_probe+0x268/0x330
[   27.340141]  platform_drv_probe+0x50/0xa0
[   27.343961]  really_probe+0x108/0x348
[   27.348126]  driver_probe_device+0x58/0x100
[   27.351772]  device_driver_attach+0x6c/0x90
[   27.355765]  __driver_attach+0x84/0xc8
[   27.359934]  bus_for_each_dev+0x74/0xc8
[   27.363752]  driver_attach+0x20/0x28
[   27.367486]  bus_add_driver+0x148/0x1f0
[   27.371304]  driver_register+0x60/0x110
[   27.374863]  __platform_driver_register+0x40/0x48
[   27.378684]  msm_drm_register+0x50/0x64
[   27.383543]  do_one_initcall+0x5c/0x1b0
[   27.387189]  kernel_init_freeable+0x1a0/0x214
[   27.391010]  kernel_init+0x10/0x108
[   27.395523]  ret_from_fork+0x10/0x18
[   27.398820] ---[ end trace b72e1718b76e5ecd ]---
[   27.405984] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[   27.407526] Mem abort info:
[   27.417438]   ESR = 0x96000004
[   27.418794]   EC = 0x25: DABT (current EL), IL = 32 bits
[   27.422391]   SET = 0, FnV = 0
[   27.427901]   EA = 0, S1PTW = 0
[   27.430579] Data abort info:
[   27.433768]   ISV = 0, ISS = 0x00000004
[   27.436359]   CM = 0, WnR = 0
[   27.440417] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000178929000
[   27.443473] [0000000000000000] pgd=0000000000000000
[   27.449996] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[   27.454174] Modules linked in:
[   27.459847] CPU: 2 PID: 163 Comm: kworker/u8:2 Tainted: G        W         4.14.0-qcomlt-arm64 #1
[   27.462900] Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
[   27.472121] Workqueue: msm msm_gem_free_work
[   27.477934] pstate: 80000005 (Nzcv daif -PAN -UAO)
[   27.482402] pc : _raw_write_lock_irqsave+0x1f8/0x2b4
[   27.487068] lr : drm_vma_offset_remove+0x18/0x70
[   27.492010] sp : ffff800012723d20
[   27.496615] x29: ffff800012723d20 x28: 0000000000000000
[   27.499834] x27: 0000000000000000 x26: ffff0000f716b068
[   27.505205] x25: 0000000000000000 x24: ffff0000f716c0a8
[   27.510508] x23: dead000000000100 x22: dead000000000122
[   27.515796] x21: 0000000000000000 x20: ffff0000f712f018
[   27.521097] x19: ffff0000f712f000 x18: 0000000000000000
[   27.526382] x17: 0000000000000000 x16: 0000000000000000
[   27.531681] x15: 0000000000000000 x14: 0000000000000000
[   27.536984] x13: 0000000000000400 x12: 0000000000000000
[   27.542269] x11: 0000000000000000 x10: 0000000000000000
[   27.547569] x9 : 0000000000000000 x8 : 0000000040000000
[   27.552864] x7 : 0000000000000000 x6 : ffff0000fdc34438
[   27.558151] x5 : 0000000000000200 x4 : 0000000000000200
[   27.563447] x3 : 0000000000000000 x2 : 00000000000000ff
[   27.568742] x1 : 0000000000000000 x0 : 0000000000000000
[   27.574041] Call trace:
[   27.579421]  _raw_write_lock_irqsave+0x1f8/0x2b4
[   27.581632]  drm_vma_offset_remove+0x18/0x70
[   27.586506]  drm_gem_object_release+0x3c/0x50
[   27.590752]  msm_gem_free_work+0x94/0x150
[   27.594999]  process_one_work+0x1e0/0x358
[   27.598945]  worker_thread+0x40/0x488
[   27.602997]  kthread+0x118/0x120
[   27.606594]  ret_from_fork+0x10/0x18
[   27.610039] Code: 88047c62 35ffff84 17fffe92 f9800071 (885ffc60)
[   27.613539] ---[ end trace b72e1718b76e5ece ]---

[robclark]

I’ve not seen anything like that… I’ve not had a chance to boot db820c recently, but I’ve booted some newer things on v5.5-rc with no issue, and at least for the first backtrace, it should be a common code path. What was the last kernel that worked?

re: the KERNELRELEASE thing, is it possibly that you end up trying to load some v4.14.0 modules in a v5.4+ kernel? I’m sure that could go pretty badly…

[doitright]

Hi @robclark , thank you for responding.

There is no chance that it tried to load 4.14 modules. I have forgotten a few times to delete and replace the modules, but it goes far worse.

The most recent kernel I have had running successfully on the board was actually a 4.14 (.165). I tried 4.19, but couldn’t get any kind of debug output at all before it rebooted.

[anon91830841]

latest kernel (5.5-rc7) seems to boot fine on kernelci.org:
https://storage.kernelci.org/mainline/master/v5.5-rc7/arm64/defconfig/gcc-8/lab-bjorn/boot-apq8096-db820c.html

are you sure you are not altering the DTS in any ways?

[doitright]

I havent touched the DTS.

Are you sure that yours is working? Display working? Your log is showing the same crashes mine is starting at 6.501368 seconds.

[vinaysimha]

i had built the 5.5.0-rc6 linux-next kernel, it boots, not able to detect the rootfs.
i had used the defconfig.

6640_5.5.0-rc6 - Pastebin.com

Do we need to use any distro.config from 4.14.96 kernel and different initrd?

[doitright]

Your issue is kind of off topic. Your UFS isn’t being initialized, you are missing some configs needed for that. Look at the configs that @Loic proposed here; [PATCH] arm64: Add qcom Kconfig fragment

[doitright]

I’ve made some excellent progress on this issue.

It turns out that the Linaro Debian snapshots are, as of FRIDAY, coming with kernel 5.4.12.
Config from here;
http://snapshots.linaro.org/96boards/dragonboard820c/linaro/debian/latest/config-5.4.0-qcomlt-arm64
Source from here;
https://git.linaro.org/landing-teams/working/qualcomm/kernel.git/log/?h=release/qcomlt-5.4
Status: WORKING.

Now the interesting part…
Same config, but source from here;
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/?h=v5.4.12
Status: NOT working.

$ git log --oneline v5.4.12..release/qcomlt-5.4
27cd531 arch/arm64/configs: Enable CONFIG_*_WCD934X to get audio in DB845c
e3f877a Merge tag 'v5.4.12' into release/qcomlt-5.4
a30237d arm64: defconfig: Make GLINK RPM builtin
5dcc1fd arm64: dts: qcom: db820c: Specify firmware for adsp and mpss
e8c3051 arm64: dts: msm8996: Add modem remoteproc
4576ecf arch/arm64/configs/defconfig: Switch CONFIG_PHY_QCOM_UFS to builtin
2ee4b48 Merge remote-tracking branch 'srini/release/qcomlt-5.4' into release/qcomlt-5.4
e9a9f30 fixup: dts: db845c: audio
26683d7 fixup: wsa881x codec
ece1ea0 fixup: qcom soundwire controller
66f2cd1 fixup: wcd934x support
34168ab gpio: Add definition for GPIO direction
e5f9fc5 arm64: dts: qcom: msm8996: Define parent clocks for gcc
a53a5a8 clk: qcom: gcc-msm8996: Fix parent for CLKREF clocks
edcbe8e arm64: dts: qcom: db410c: Update firmware-name for wcnss and mpss
4dd73a0 remoteproc: qcom: wcnss: Allow specifying firmware-name
e8fc95a0 Merge tag 'v5.4.8' into release/qcomlt-5.4
acf5123 Merge tag 'v5.4.6' into release/qcomlt-5.4
3458143 Merge tag 'v5.4.5' into release/qcomlt-5.4
ea4beed arm64: defconfig: Enable SDM845c audio and soundwire
d1f6f5a arm64: defconfig: Enable fastrpc, mailbox, rpmpd, reset_pdc
9c36b5f arm64: defconfig: Enable ethernet configs
72ebb7a arm64: defconfig: Enable PM8916 watchdog driver
7c44381 arm64: defconfig: add msm8996 analog audio support (slimbus, wcd9335)
c40ec88 arch/arm64/configs/defconfig: enable POWER_RESET_QCOM_PON for db820c
2084682 arch/arm64/configs/defconfig: Add RPMSG and RMTFS_MEM as m for db820c
38b22e7 arch/arm64/configs/defconfig: Enable USB_DWC3_ULPI for db820c
5df70304 arch/arm64/configs/defconfig: Enable SND_SOC_MSM8996 as m for db820c
486f222 arch/arm64/configs/defconfig: Enable ath10k as m for db820c
ce4328a arch/arm64/configs/defconfig: Enable QRTR as modules
9c42fca rch/arm64/configs/defconfig: Enable BT_QCOMSMD as m for db410c
4e229e6 arch/arm64/configs/defconfig: Enable default governor on demand
a66a67f arch/arm64/configs/defconfig: Enable DB410c audio as modules
e351e6d arch/arm64/configs/defconfig: Enable remoteproc QCOM_ADSP_PIL as modules
d5f52b1 arch/arm64/configs/defconfig: Enable ULPI bus needed by DB410c USB
c5de666 arch/arm64/configs/defconfig: Enable SDM_VIDEOCC_845 for venus clock on DB845c
6c30c12 arch/arm64/configs/defconfig: Enable bluetooth on DB845c
0a9ee21 media: venus: core: Fix msm8996 frequency table
8a6b075 arm: dts: qcom: db410c: Enable USB OTG support
9a74135 Merge remote-tracking branch 'cpuidle/wrk3/automerge/idle-branch' into integration-linux-qcomlt
e85b470 Merge remote-tracking branch 'sm8150-misc/tracking-qcomlt-sm8150-misc' into integration-linux-qcomlt
4ace0d6 Merge remote-tracking branch 'sm8150-dt/tracking-qcomlt-sm8150-dt' into integration-linux-qcomlt
46744f0 Merge remote-tracking branch 'sm8150-gcc/tracking-qcomlt-sm8150-gcc' into integration-linux-qcomlt
979abd1 Merge remote-tracking branch 'qcs404-cpufreq/tracking-qcomlt-qcs404-cpufreq' into integration-linux-qcomlt
dfec889 Merge remote-tracking branch 'qcs404-dt/tracking-qcomlt-qcs404-dt' into integration-linux-qcomlt
7d9112d Merge remote-tracking branch 'qcs404-defconfig/tracking-qcomlt-qcs404-defconfig' into integration-linux-qcomlt
692b0a4 Merge remote-tracking branch 'ath10k/tracking-qcomlt-ath10k' into integration-linux-qcomlt
c59dc5b Merge remote-tracking branch 'lt9611/tracking-qcomlt-lt9611' into integration-linux-qcomlt
48b96c6 Merge remote-tracking branch 'thermal/wrk3/automerge/thermal-branch' into integration-linux-qcomlt
9c82f09 Merge remote-tracking branch 'bus-scaling/icc-testing' into integration-linux-qcomlt
765fcca Merge remote-tracking branch 'sdm845-db845c/tracking-qcomlt-sdm845-db845c' into integration-linux-qcomlt
6d5990b Merge remote-tracking branch 'sdm845-pcie/tracking-qcomlt-sdm845-pcie' into integration-linux-qcomlt
e62d579 Merge remote-tracking branch 'distro.config/tracking-qcomlt-config-fragments' into integration-linux-qcomlt
16c91ac Merge remote-tracking branch 'arm64-defconfig/tracking-qcomlt-arm64-defconfig' into integration-linux-qcomlt
fe48185 Merge remote-tracking branch 'ufs/tracking-qcomlt-ufs' into integration-linux-qcomlt
0942896 Merge remote-tracking branch 'iommu/tracking-qcomlt-iommu' into integration-linux-qcomlt
4ae000c Merge remote-tracking branch 'drm-msm/tracking-qcomlt-drm-msm' into integration-linux-qcomlt
258e650 Merge remote-tracking branch 'fixes/tracking-qcomlt-fixes-without-devfreq-reverts' into integration-linux-qcomlt
3822eab Merge remote-tracking branch 'audio/tracking-qcomlt-audio' into integration-linux-qcomlt
17ef85e Merge remote-tracking branch 'wcd9335/tracking-qcomlt-wcd9335' into integration-linux-qcomlt
53d8b93 Merge remote-tracking branch 'msm8996-dt/tracking-qcomlt-msm8996-dt' into integration-linux-qcomlt
c698e29 arm64: defconfig: Enable interconnect drivers
73d06c2 arm64: dts: msm8916: Add interconnect provider DT nodes
ad8cc09 interconnect: Add debugfs test code
6dd82ea interconnect: Print the tag in the debugfs summary
4a62979 interconnect: qcom: qcs404: Drop unused slab.h include
784de04 interconnect: Check for valid path in icc_set_bw()
d30cec2 interconnect: qcom: Add MSM8916 interconnect provider driver
b54317d dt-bindings: interconnect: Add Qualcomm MSM8916 DT bindings
db7a7ca interconnect: Add interconnect_graph file to debugfs
40db6d9 interconnect: qcom: Fix Kconfig indentation
9d3436b interconnect: qcom: Use the new common helper for node removal
b1a25dc interconnect: Add a common helper for removing all nodes
8a2f626 interconnect: qcom: msm8974: Walk the list safely on node removal
51d6253 interconnect: qcom: qcs404: Walk the list safely on node removal
d5052e0 interconnect: qcom: sdm845: Walk the list safely on node removal
72c0c1f interconnect: qcom: Use the standard aggregate function
7feded4 interconnect: Add a common standard aggregate function
2d2debf interconnect: Add basic tracepoints
423800e interconnect: Add a name to struct icc_path
f61c339 interconnect: Move internal structs into a separate file
1ecacc8 clk: qcom: gcc-sdm845: Add missing flag to votable GDSCs
0778ef2 interconnect: qcom: add msm8974 driver
5e639fc dt-bindings: interconnect: qcom: add msm8974 bindings
f2959ae arm64: dts: qcom: db845c: Move remoteproc firmware to sdm845
0375830 arm64: dts: qcom: sdm845: Add APSS watchdog node
f3f9ae4 arm64: dts: db845c: add Low speed expansion i2c and spi nodes
d7a1ffb arm64: dts: db845c: add support to analog audio
8e53ed0 arm64: dts: sdm845: add support to hexagon dsp audio support
813197f arm64: dts: db845: add hdmi digital audio support
fa82971 arm64: defconfig: Enable LT9611 driver
4807964 arm64: dts: qcom: sdm845-db845c: Bring in LT9611
776e06f drm/bridge: lt9611: Update include files
8a32df8 HACK: db845c: drm/bridge: lt9611: comment out lt9611_sleep_setup()
b94571f drm/bridge: lt9611: Add hdmi audio codec support
d43abea usb: xhci: provide a debugfs hook for erasing rom
be60ce2 usb: xhci: allow multiple firmware versions
f810f55 usb: xhci: Add ROM loader for uPD720201
55be56b usb: xhci: add firmware loader for uPD720201 and uPD720202 w/o ROM
169d87f arm64: dts: qcom: db845c: Enable LVS 1 and 2
a9df867 arm64: dts: qcom: db845c: Enable PCIe controllers
056097a arm64: dts: qcom: sdm845: Add second PCIe PHY and controller
04de039 arm64: dts: qcom: sdm845: Add first PCIe controller and PHY
03f5d4e PCI: qcom: Add support for SDM845 PCIe controller
f776079 PCI: qcom: Fix the fixup of PCI_VENDOR_ID_QCOM
2b07b28 dt-bindings: PCI: qcom: Add support for SDM845 PCIe
60cb030 phy: qcom: qmp: Add SDM845 QHP PCIe PHY
7922278 phy: qcom: qmp: Add SDM845 PCIe QMP PHY support
6dc7319 phy: qcom: qmp: Use power_on/off ops for PCIe
00ef8d1 phy: qcom-qmp: Increase PHY ready timeout
ec75dab dt-bindings: phy-qcom-qmp: Add SDM845 PCIe to binding
3649f67 arm64: defconfig: Enable ATH10K_SNOC
8c74983 ath10k: qmi: Sleep for a while before assigning MSA memory
ac3231f ath10k: Add quirk to skip host capability QMI request
aa08589 soc: qcom: socinfo: add missing soc_id sysfs entry
a49117b soc: qcom: socinfo: add sdm845 and sda845 soc ids
14087f0 misc: fastrpc: revert max init file size back to 2MB
c14d3d7 misc: fastrpc: handle interrupted contexts
c2afa790 misc: fastrpc: do not interrupt kernel calls
8ca865a misc: fastrpc: fix memory leak from miscdev->name
2248077 misc: fastrpc: add mmap/unmap support
3f7f344 drm/msm/hdmi: Switch to DRM_CONNECTOR_POLL_HPD
1bea2e19 drm/msm/hdmi: Keep the HDMI_CTRL_ENABLE bitfield always on
984ebe5 drm/msm/hdmi: wait a bit for HPD sense to come up
a25c0a8 [HACK] clk: qcom: Hook up gpu_gx gdsc as a parent of gpu_gdsc
9ef2eae mmc: mmci: Support any block sizes for ux500v2 and qcom variant
49bcd0b clk: qcom: gcc: Add missing clocks in SM8150
b67e2fc phy: qcom-qmp: Add SM8150 QMP UFS PHY support
46324ae dt-bindings: phy-qcom-qmp: Add sm8150 UFS phy compatible string
1c82883 dt-bindings: ufs: Add sm8150 compatible string
ef2734c ASoC: qcom: sdm845: add support to DB845c and Lenovo Yoga
11504d7 ASoC: qcom: dt-bindings: Add compatible for DB845c and Lenovo Yoga
58d0a3b pinctrl: qcom-wcd934x: Add support to wcd934x pinctrl driver.
c854ba5 dt-bindings: pinctrl: qcom-wcd934x: Add bindings for gpio
c25ea5a ASoC: wcd934x: add audio routings
6c7bdfb ASoC: wcd934x: add capture dapm widgets
70a640b ASoC: wcd934x: add playback dapm widgets
53ff7c5 ASoC: wcd934x: add basic controls
772257f ASoC: wcd934x: add support to wcd9340/wcd9341 codec
6cc8419 mfd: wcd934x: add support to wcd9340/wcd9341 codec
ee1e3eb ASoC: dt-bindings: add dt bindings for WCD9340/WCD9341 audio codec
f6e4226 arm64: dts: qcom: c630: Enable adsp, cdsp and mpss
866721b ASoC: wcd9335: convert to correct paging in regmap config
685c57a ASoC: codecs: add wsa881x amplifier support
b0184e4 dt-bindings: ASoC: WSA881x: Add missing #sound-dai-cells
c104176 dt-bindings: ASoC: Add WSA881x bindings
2f0dbed soundwire: qcom: add support for SoundWire controller
8ea19ea dt-bindings: soundwire: add bindings for Qcom controller
9f1b8b7 slimbus: ngd: add v2.1.0 compatible
e7054b5 soc: qcom: apr: Release the QMI handle on failure
7c711f5 soundwire: stream: check defer msg before freeing it
14f07a4 HACK: soundwire: bus: check pm runtime enabled before err
2acb8e2 HACK: soundwire: stream: do not program bits and sample size for pdm
17f792e HACK: soundwire: bus: hack to not setup slave interrupts
08fc27e HACK: qcom: apr: Wait for PD up notification
a1c2849 arm64: dts: qcom: sm8150-mtp:  Enable UFS nodes
918c02d arm64: dts: qcom: sm8150: Add ufs nodes
19a75e3 arm64: dts: qcom: Use gcc clock enums
08efe00 arm64: dts: qcom: sm8150: Add ADSP, CDSP and MPSS remoteprocs
6a4202c arm64: dts: qcom: sm8150: Add adsp, cdsp, modem and slpi smp2p
5d13cc5 arm64: defconfig: Enable Venus
0fb33de arm64: config: Enable db845c relates configs
4f6bfc6 clk: qcom: hfpll: CLK_IGNORE_UNUSED
dd487b2 clk: qcom: hfpll: register as clock provider
b5bea89 clk: qcom: hfpll: get parent clock names from DT
e3b4a3e clk: qcom: apcs-msm8916: get parent clock names from DT
14f5a33 dt-bindings: mailbox: qcom: Add clock-name optional property
4ceb7f8 clk: qcom: gcc: limit GPLL0_AO_OUT operating frequency
e27cfb7 drm/bridge: lt9611: Add i2s initialization
64c3a13 drm/bridge: Introduce LT9611 DSI to HDMI bridge
5ad1c86 ASoC: apq8096: add headset JACK support
c408886 iommu: arm-smmu: Handoff SMR registers and context banks
b833db03 iommu: arm-smmu: Don't blindly use first SMR to calculate mask
04959e7 arm64: dts/sdm845: Enable FW implemented safe sequence handler on MTP
60b3065 iommu/arm-smmu: Add support to handle Qcom's wait-for-safe logic
7e602dc firmware/qcom_scm: Add scm call to handle smmu errata
ce6079a firmware: qcom_scm-64: Add atomic version of qcom_scm_call
b5707cd arch/arm64/*/defconfig: Configure USB_XHCI_{PCI, HCD} as a module
23461f3 arm64: dts: qcom: sdm845: Specify UFS device-reset GPIO
bdb51a7 scsi: ufs-qcom: Implement device_reset vops
eb11db4 scsi: ufs: Introduce vops for resetting device
509972e [WIP] arm64: dts: msm8996: add deeper idle states
ab5b5e2 arm64: dts: qcom: enable voltage scaling (opp)
f89c800 arm64: dts: qcom: qcs404: Add USB devices and PHYs
82a6234 arm64: dts: qcom: qcs404: Add fastrpc nodes
49dd441 arm64: dts: qcom: qcs404: Add cpufreq support
474d32c arm64: dts: qcom: qcs404: Add the clocks for APCS mux/divider
94c3a42 arm64: dts: qcom: qcs404: Add HFPLL node
41ff4f2 arm64: dts: qcom: qcs404: Add OPP table
9c0b46e dt-bindings: mailbox: qcom: Add clock-name optional property
1db06fa arm64: dts: qcom: qcs404: Add USB devices and PHYs
b6b8727 ASoC: wcd9335: add mbhc support
f249ea6 ASoC: dt-bindings: Add WCD9335 MBHC specific properties
6ea03a8 arm64: defconfig: Enable QCOM UFS PHY
9a90c31 arm64: defconfig: Enable cpufreq and geni I2C
37bc096e arm64: defconfig: Add SDM845 configs for display
85531fd arm64: defconfig: Enable PMIC thermal
da6f1be arm64: defconfig: enable PHY_QCOM_QUSB2
90807d1 arm64: defconfig: Enable QRTR
ef76624 arm64: defconfig: Enable drivers used by SDM845
c498ca1 arm64: defconfig: Enable GENI serial console
237864d arm64: defconfig: Enable RPMH functionality
1dad544 arm64: defconfig: Enable geni se support for sdm845
feb094a arm64: defconfig: Enable TCS mailbox and rpmh API support
67f48bd arm64: defconfig: Enable minimal drivers needed to boot
5b2598f arm64: defconfig: Enable some Qualcomm drivers
f5104d5 arm64: defconfig: enable WCN36xx wireless
7978d15 arm64: defconfig: kconfigs for db820c
a8cd626 drivers: thermal: Initialize thermal core earlier
52cce7f drivers: cpufreq: Initialize platform drivers earlier
acf124c drivers: cpufreq: Initialize governors earlier
2623948 arm64: dts: qcom: pms405: Rename adc outputs as per schematics
be2900d arm64: dts: qcom: pms405: calibrate the VADC correctly
925da4d arm64: defconfig: Enable PMIC thermal
d85fe9c arm64: dts: msm8996: add fastrpc nodes
37113fe arm64: msm8996: fix memory region overlap
df5ebe3 arm64: dts: db820c: add support to wcd9335 playback and capture
5c02919 arm64: dts: Add s2 regulator in pmi8994
2d58756 arm64: defconfig: Enable HFPLL
43f4514 arm64: defconfig: enable USB phy drivers for qcs404
88f4308 drm/msm/hdmi: Switch to DRM_CONNECTOR_POLL_HPD
ac0d669 drm/msm/hdmi: Keep the HDMI_CTRL_ENABLE bitfield always on
6ecef88 drm/msm/hdmi: wait a bit for HPD sense to come up
e6ec98d kernel: distro.config: enable schedutil governor as default
53f9245 kernel: configs: enable RPMSG char device
be53e30 configs: add debug.config
b3b9d1d Disable blk_cgroup and blk_dev_throttling configs
530eef4 kernel: distro.config: enable PM8xxx RTC driver
3802426 kernel: distro.config: enable more networking options
1fe70d7 kernel: distro.config: enable 'BBR' TCP congestion algorithm
8f6ee89 kernel: distro.config: enable 'fq' and 'fq_codel' qdiscs
79517f2 kernel: distro.config: enable 'schedutil' CPUfreq governor
830deff9 kernel: configs: set USB_CONFIG_F_FS in distro.config
0b57d08 kernel: configs: add freq stat to sysfs
425f4dc kernel: configs: add more USB net drivers
5a0e9b2 kernel: configs: enable dm_mod and dm_crypt
a483ffd kernel: distro.config: enable debug friendly USB network adpater
bb8ef87 kernel: configs; add distro.config

[doitright]

@robclark :

This works working/qualcomm/kernel.git - Qualcomm Landing Team kernel

This doesn’t kernel/git/stable/linux.git - Linux kernel stable tree

The difference between them is not staggering, but still greek to me.

[doitright]

I’ve managed to work it out;

Commits · mainline-5.4.20-db820c · AOSP-Automotive / dragonboard-kernel-src