Hi Laurent,
On Thu, May 20, 2021 at 8:51 AM Laurent Pinchart
<laurent.pinchart+renesas@xxxxxxxxxxxxxxxx> wrote:
> Replace the manual panel handling with usage of the DRM panel bridge
> helper. This simplifies the driver, and brings support for
> DRM_BRIDGE_ATTACH_NO_CONNECTOR as an added bonus.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Thanks for your patch, which is now commit e9e056949c927e5b ("drm:
rcar-du: lvds: Convert to DRM panel bridge helper") in drm-next.
This causes the following scary messages in the kernel log on Ebisu-4D:
[drm:drm_bridge_attach] *ERROR* failed to attach bridge
/soc/lvds-encoder@feb90100 to encoder None-66: -22
renesas_sdhi_internal_dmac ee100000.mmc: mmc1 base at
0x00000000ee100000, max clock rate 200 MHz
rcar-du feb00000.display: failed to initialize encoder
/soc/lvds-encoder@feb90100 on output 3 (-22), skipping
renesas_sdhi_internal_dmac ee120000.mmc: mmc2 base at
0x00000000ee120000, max clock rate 200 MHz
------------[ cut here ]------------
renesas_sdhi_internal_dmac ee160000.mmc: mmc0 base at
0x00000000ee160000, max clock rate 200 MHz
possible_clones mismatch: [ENCODER:62:None-62] mask=0x1
possible_clones=0x3 vs. [ENCODER:66:None-66] mask=0x4
possible_clones=0x3
WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:583
drm_mode_config_validate+0x3cc/0x4c8
CPU: 1 PID: 68 Comm: kworker/u4:2 Not tainted
5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277
Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT)
Workqueue: events_unbound deferred_probe_work_func
pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
pc : drm_mode_config_validate+0x3cc/0x4c8
lr : drm_mode_config_validate+0x3cc/0x4c8
sp : ffff80001239ba80
x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001
x26: ffff000009de8868 x25: 000000000000001f x24: ffff00000a490f80
mmc0: new HS400 MMC card at address 0001
x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20
x20: ffff000009de8018 x19: ffff00000a490b80 x18: 0000000000000020
x17: 7364766c2f636f73 x16: 0000000000004a12 x15: ffff00000892df38
x14: 0000000000000000 x13: 0000000000000003 x12: ffff8000113e3a80
x11: 0000000000000001 x10: 0000000000000078
mmcblk0: mmc0:0001 BGSD3R 29.1 GiB
x9 : ffff800011172994
x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000
x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
drm_mode_config_validate+0x3cc/0x4c8
drm_dev_register+0x174/0x208
rcar_du_probe+0xc4/0x110
platform_probe+0x64/0xd0
really_probe+0x134/0x2e8
__driver_probe_device+0x74/0xd8
driver_probe_device+0x3c/0xe0
__device_attach_driver+0xa8/0xf0
bus_for_each_drv+0x74/0xc8
__device_attach+0xec/0x148
device_initial_probe+0x10/0x18
bus_probe_device+0x98/0xa0
mmcblk0boot0: mmc0:0001 BGSD3R 16.0 MiB
deferred_probe_work_func+0x88/0xc0
process_one_work+0x284/0x6d0
worker_thread+0x48/0x418
kthread+0x14c/0x158
ret_from_fork+0x10/0x18
irq event stamp: 27688
hardirqs last enabled at (27687): [<ffff800010104424>] vprintk_emit+0x2f4/0x2f8
hardirqs last disabled at (27688): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88
mmcblk0boot1: mmc0:0001 BGSD3R 16.0 MiB
softirqs last enabled at (27616): [<ffff8000100104ac>] _stext+0x4ac/0x620
softirqs last disabled at (27607): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0
---[ end trace 6e42cb0428a6481b ]---
------------[ cut here ]------------
mmcblk0rpmb: mmc0:0001 BGSD3R 4.00 MiB, chardev (243:0)
possible_clones mismatch: [ENCODER:64:None-64] mask=0x2
possible_clones=0x3 vs. [ENCODER:66:None-66] mask=0x4
possible_clones=0x3
WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:583
drm_mode_config_validate+0x3cc/0x4c8
CPU: 1 PID: 68 Comm: kworker/u4:2 Tainted: G W
5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277
Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT)
Workqueue: events_unbound deferred_probe_work_func
pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
pc : drm_mode_config_validate+0x3cc/0x4c8
lr : drm_mode_config_validate+0x3cc/0x4c8
sp : ffff80001239ba80
x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001
x26: ffff000009de8868 x25: 000000000000001f x24: ffff00000a490f80
x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20
x20: ffff000009de8018 x19: ffff00000a490d80 x18: 0000000000000010
x17: 746978655f717269 x16: 205d3e6364666638 x15: 076c0763075f0765
x14: 000000000000014d x13: ffff00000892df38 x12: 00000000ffffffea
x11: ffff800011453b70 x10: ffff80001143bb30 x9 : ffff80001143bb88
x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000
x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
drm_mode_config_validate+0x3cc/0x4c8
drm_dev_register+0x174/0x208
rcar_du_probe+0xc4/0x110
platform_probe+0x64/0xd0
really_probe+0x134/0x2e8
__driver_probe_device+0x74/0xd8
driver_probe_device+0x3c/0xe0
__device_attach_driver+0xa8/0xf0
bus_for_each_drv+0x74/0xc8
__device_attach+0xec/0x148
device_initial_probe+0x10/0x18
bus_probe_device+0x98/0xa0
deferred_probe_work_func+0x88/0xc0
process_one_work+0x284/0x6d0
worker_thread+0x48/0x418
kthread+0x14c/0x158
ret_from_fork+0x10/0x18
irq event stamp: 27858
hardirqs last enabled at (27857): [<ffff800010103e84>]
console_unlock+0x4d4/0x638
hardirqs last disabled at (27858): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88
softirqs last enabled at (27822): [<ffff8000100104ac>] _stext+0x4ac/0x620
softirqs last disabled at (27817): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0
---[ end trace 6e42cb0428a6481c ]---
------------[ cut here ]------------
possible_clones mismatch: [ENCODER:66:None-66] mask=0x4
possible_clones=0x3 vs. [ENCODER:62:None-62] mask=0x1
possible_clones=0x3
WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:583
drm_mode_config_validate+0x3cc/0x4c8
CPU: 1 PID: 68 Comm: kworker/u4:2 Tainted: G W
5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277
Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT)
Workqueue: events_unbound deferred_probe_work_func
pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
pc : drm_mode_config_validate+0x3cc/0x4c8
lr : drm_mode_config_validate+0x3cc/0x4c8
sp : ffff80001239ba80
x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001
x26: ffff000009de8868 x25: 000000000000001f x24: ffff00000a490b80
x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20
x20: ffff000009de8018 x19: ffff00000a490f80 x18: 0000000000000010
x17: 746978655f717269 x16: 205d3e6364666638 x15: 076c0763075f0765
x14: 0000000000000179 x13: ffff00000892df38 x12: 00000000ffffffea
x11: ffff800011453b70 x10: ffff80001143bb30 x9 : ffff80001143bb88
x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000
x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
drm_mode_config_validate+0x3cc/0x4c8
drm_dev_register+0x174/0x208
rcar_du_probe+0xc4/0x110
platform_probe+0x64/0xd0
really_probe+0x134/0x2e8
__driver_probe_device+0x74/0xd8
driver_probe_device+0x3c/0xe0
__device_attach_driver+0xa8/0xf0
bus_for_each_drv+0x74/0xc8
__device_attach+0xec/0x148
device_initial_probe+0x10/0x18
bus_probe_device+0x98/0xa0
deferred_probe_work_func+0x88/0xc0
process_one_work+0x284/0x6d0
worker_thread+0x48/0x418
kthread+0x14c/0x158
ret_from_fork+0x10/0x18
irq event stamp: 27888
hardirqs last enabled at (27887): [<ffff800010103e84>]
console_unlock+0x4d4/0x638
hardirqs last disabled at (27888): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88
softirqs last enabled at (27866): [<ffff8000100104ac>] _stext+0x4ac/0x620
softirqs last disabled at (27861): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0
---[ end trace 6e42cb0428a6481d ]---
------------[ cut here ]------------
possible_clones mismatch: [ENCODER:66:None-66] mask=0x4
possible_clones=0x3 vs. [ENCODER:64:None-64] mask=0x2
possible_clones=0x3
WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:583
drm_mode_config_validate+0x3cc/0x4c8
CPU: 1 PID: 68 Comm: kworker/u4:2 Tainted: G W
5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277
Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT)
Workqueue: events_unbound deferred_probe_work_func
pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
pc : drm_mode_config_validate+0x3cc/0x4c8
lr : drm_mode_config_validate+0x3cc/0x4c8
sp : ffff80001239ba80
x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001
x26: ffff000009de8868 x25: 000000000000001f x24: ffff00000a490d80
x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20
x20: ffff000009de8018 x19: ffff00000a490f80 x18: 0000000000000010
x17: 746978655f717269 x16: 205d3e6364666638 x15: 076c0763075f0765
x14: 00000000000001a5 x13: ffff00000892df38 x12: 00000000ffffffea
x11: ffff800011453b70 x10: ffff80001143bb30 x9 : ffff80001143bb88
x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000
x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
drm_mode_config_validate+0x3cc/0x4c8
drm_dev_register+0x174/0x208
rcar_du_probe+0xc4/0x110
platform_probe+0x64/0xd0
really_probe+0x134/0x2e8
__driver_probe_device+0x74/0xd8
driver_probe_device+0x3c/0xe0
__device_attach_driver+0xa8/0xf0
bus_for_each_drv+0x74/0xc8
__device_attach+0xec/0x148
device_initial_probe+0x10/0x18
bus_probe_device+0x98/0xa0
deferred_probe_work_func+0x88/0xc0
process_one_work+0x284/0x6d0
worker_thread+0x48/0x418
kthread+0x14c/0x158
ret_from_fork+0x10/0x18
irq event stamp: 27924
hardirqs last enabled at (27923): [<ffff800010103e84>]
console_unlock+0x4d4/0x638
hardirqs last disabled at (27924): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88
softirqs last enabled at (27902): [<ffff8000100104ac>] _stext+0x4ac/0x620
softirqs last disabled at (27891): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0
---[ end trace 6e42cb0428a6481e ]---
------------[ cut here ]------------
Bogus possible_clones: [ENCODER:66:None-66] possible_clones=0x3 (full
encoder mask=0x1f)
WARNING: CPU: 1 PID: 68 at drivers/gpu/drm/drm_mode_config.c:594
drm_mode_config_validate+0x150/0x4c8
CPU: 1 PID: 68 Comm: kworker/u4:2 Tainted: G W
5.14.0-rc3-arm64-renesas-00324-ge9e056949c92 #1277
Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT)
Workqueue: events_unbound deferred_probe_work_func
pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
pc : drm_mode_config_validate+0x150/0x4c8
lr : drm_mode_config_validate+0x150/0x4c8
sp : ffff80001239ba80
x29: ffff80001239ba90 x28: ffff00000801c005 x27: 0000000000000001
x26: ffff000009de8868 x25: 000000000000001f x24: ffff000009de8860
x23: ffff000009de8868 x22: ffff800011029ea0 x21: ffff800011029e20
x20: ffff000009de8018 x19: ffff00000a490f80 x18: 0000000000000010
x17: 203378303d73656e x16: 6f6c635f656c6269 x15: 0720072007200720
x14: 00000000000001d1 x13: ffff00000892df38 x12: 00000000ffffffea
x11: ffff800011453b70 x10: ffff80001143bb30 x9 : ffff80001143bb88
x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000
x2 : ffff8000113e38d8 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
drm_mode_config_validate+0x150/0x4c8
drm_dev_register+0x174/0x208
rcar_du_probe+0xc4/0x110
platform_probe+0x64/0xd0
really_probe+0x134/0x2e8
__driver_probe_device+0x74/0xd8
driver_probe_device+0x3c/0xe0
__device_attach_driver+0xa8/0xf0
bus_for_each_drv+0x74/0xc8
__device_attach+0xec/0x148
device_initial_probe+0x10/0x18
bus_probe_device+0x98/0xa0
deferred_probe_work_func+0x88/0xc0
process_one_work+0x284/0x6d0
worker_thread+0x48/0x418
kthread+0x14c/0x158
ret_from_fork+0x10/0x18
irq event stamp: 27966
hardirqs last enabled at (27965): [<ffff800010103e84>]
console_unlock+0x4d4/0x638
hardirqs last disabled at (27966): [<ffff800010ca4eb4>] el1_dbg+0x24/0x88
softirqs last enabled at (27940): [<ffff8000100104ac>] _stext+0x4ac/0x620
softirqs last disabled at (27927): [<ffff80001008ffdc>] irq_exit+0x1b4/0x1c0
---[ end trace 6e42cb0428a6481f ]---
[drm] Initialized rcar-du 1.0.0 20130110 for feb00000.display on minor 0
drm] Device feb00000.display probed
Console: switching to colour frame buffer device 128x48
rcar-du feb00000.display: [drm] fb0: rcar-du frame buffer device
Reverting this commit fixes the issue.
Note that I have no actual display device attached, so I do not know
if display out really works.
Salvator-X(S) seems to be fine, with the same disclaimer.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
