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H A Damdgpu_acp.h25030321 Mon Nov 23 09:37:30 CST 2015 Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com> drm/amd: add pm domain for ACP IP sub blocks

ACP IP have internal DMA controller, DW I2S controller and DSPs
as separate power tiles. DMA and I2S devices are added to generic
pm domain, so that entire IP can be powered off/on at appropriate
times. Unused DSPs are made to be powered off though they are powered
on during ACP pm domain power on sequence.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
25030321 Mon Nov 23 09:37:30 CST 2015 Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com> drm/amd: add pm domain for ACP IP sub blocks

ACP IP have internal DMA controller, DW I2S controller and DSPs
as separate power tiles. DMA and I2S devices are added to generic
pm domain, so that entire IP can be powered off/on at appropriate
times. Unused DSPs are made to be powered off though they are powered
on during ACP pm domain power on sequence.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
H A Damdgpu_acp.caff89028 Tue Jul 20 12:22:15 CDT 2021 Kai-Heng Feng <kai.heng.feng@canonical.com> drm/amdgpu/acp: Make PM domain really work

Devices created by mfd_add_hotplug_devices() don't really increase the
index of its name, so get_mfd_cell_dev() cannot find any device, hence a
NULL dev is passed to pm_genpd_add_device():
[ 56.974926] (NULL device *): amdgpu: device acp_audio_dma.0.auto added to pm domain
[ 56.974933] (NULL device *): amdgpu: Failed to add dev to genpd
[ 56.974941] [drm:amdgpu_device_ip_init [amdgpu]] *ERROR* hw_init of IP block <acp_ip> failed -22
[ 56.975810] amdgpu 0000:00:01.0: amdgpu: amdgpu_device_ip_init failed
[ 56.975839] amdgpu 0000:00:01.0: amdgpu: Fatal error during GPU init
[ 56.977136] ------------[ cut here ]------------
[ 56.977143] kernel BUG at mm/slub.c:4206!
[ 56.977158] invalid opcode: 0000 [#1] SMP NOPTI
[ 56.977167] CPU: 1 PID: 1648 Comm: modprobe Not tainted 5.12.0-051200rc8-generic #202104182230
[ 56.977175] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./FM2A68M-HD+, BIOS P5.20 02/13/2019
[ 56.977180] RIP: 0010:kfree+0x3bf/0x410
[ 56.977195] Code: 89 e7 48 d3 e2 f7 da e8 5f 0d 02 00 80 e7 02 75 3e 44 89 ee 4c 89 e7 e8 ef 5f fd ff e9 fa fe ff ff 49 8b 44 24 08 a8 01 75 b7 <0f> 0b 4c 8b 4d b0 48 8b 4d a8 48 89 da 4c 89 e6 41 b8 01 00 00 00
[ 56.977202] RSP: 0018:ffffa48640ff79f0 EFLAGS: 00010246
[ 56.977210] RAX: 0000000000000000 RBX: ffff9286127d5608 RCX: 0000000000000000
[ 56.977215] RDX: 0000000000000000 RSI: ffffffffc099d0fb RDI: ffff9286127d5608
[ 56.977220] RBP: ffffa48640ff7a48 R08: 0000000000000001 R09: 0000000000000001
[ 56.977224] R10: 0000000000000000 R11: ffff9286087d8458 R12: fffff3ae0449f540
[ 56.977229] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[ 56.977234] FS: 00007f9de5929540(0000) GS:ffff928612e80000(0000) knlGS:0000000000000000
[ 56.977240] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 56.977245] CR2: 00007f697dd97160 CR3: 00000001110f0000 CR4: 00000000001506e0
[ 56.977251] Call Trace:
[ 56.977261] amdgpu_dm_encoder_destroy+0x1b/0x30 [amdgpu]
[ 56.978056] drm_mode_config_cleanup+0x4f/0x2e0 [drm]
[ 56.978147] ? kfree+0x3dd/0x410
[ 56.978157] ? drm_managed_release+0xc8/0x100 [drm]
[ 56.978232] drm_mode_config_init_release+0xe/0x10 [drm]
[ 56.978311] drm_managed_release+0x9d/0x100 [drm]
[ 56.978388] devm_drm_dev_init_release+0x4d/0x70 [drm]
[ 56.978450] devm_action_release+0x15/0x20
[ 56.978459] release_nodes+0x77/0xc0
[ 56.978469] devres_release_all+0x3f/0x50
[ 56.978477] really_probe+0x245/0x460
[ 56.978485] driver_probe_device+0xe9/0x160
[ 56.978492] device_driver_attach+0xab/0xb0
[ 56.978499] __driver_attach+0x8f/0x150
[ 56.978506] ? device_driver_attach+0xb0/0xb0
[ 56.978513] bus_for_each_dev+0x7e/0xc0
[ 56.978521] driver_attach+0x1e/0x20
[ 56.978528] bus_add_driver+0x135/0x1f0
[ 56.978534] driver_register+0x91/0xf0
[ 56.978540] __pci_register_driver+0x54/0x60
[ 56.978549] amdgpu_init+0x77/0x1000 [amdgpu]
[ 56.979246] ? 0xffffffffc0dbc000
[ 56.979254] do_one_initcall+0x48/0x1d0
[ 56.979265] ? kmem_cache_alloc_trace+0x120/0x230
[ 56.979274] ? do_init_module+0x28/0x280
[ 56.979282] do_init_module+0x62/0x280
[ 56.979288] load_module+0x71c/0x7a0
[ 56.979296] __do_sys_finit_module+0xc2/0x120
[ 56.979305] __x64_sys_finit_module+0x1a/0x20
[ 56.979311] do_syscall_64+0x38/0x90
[ 56.979319] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 56.979328] RIP: 0033:0x7f9de54f989d
[ 56.979335] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48
[ 56.979342] RSP: 002b:00007ffe3c395a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 56.979350] RAX: ffffffffffffffda RBX: 0000560df3ef4330 RCX: 00007f9de54f989d
[ 56.979355] RDX: 0000000000000000 RSI: 0000560df3a07358 RDI: 000000000000000f
[ 56.979360] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000000000000000
[ 56.979365] R10: 000000000000000f R11: 0000000000000246 R12: 0000560df3a07358
[ 56.979369] R13: 0000000000000000 R14: 0000560df3ef4460 R15: 0000560df3ef4330
[ 56.979377] Modules linked in: amdgpu(+) iommu_v2 gpu_sched drm_ttm_helper ttm drm_kms_helper cec rc_core i2c_algo_bit fb_sys_fops syscopyarea sysfillrect sysimgblt nft_counter xt_tcpudp ipt_REJECT nf_reject_ipv4 xt_conntrack iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables libcrc32c nfnetlink ip6_tables iptable_filter bpfilter input_leds binfmt_misc edac_mce_amd kvm_amd ccp kvm snd_hda_codec_realtek snd_hda_codec_generic crct10dif_pclmul snd_hda_codec_hdmi ledtrig_audio ghash_clmulni_intel aesni_intel snd_hda_intel snd_intel_dspcfg snd_seq_midi crypto_simd snd_intel_sdw_acpi cryptd snd_hda_codec snd_seq_midi_event snd_rawmidi snd_hda_core snd_hwdep snd_seq fam15h_power k10temp snd_pcm snd_seq_device snd_timer snd mac_hid soundcore sch_fq_codel nct6775 hwmon_vid drm ip_tables x_tables autofs4 dm_mirror dm_region_hash dm_log hid_generic usbhid hid uas usb_storage r8169 crc32_pclmul realtek ahci xhci_pci i2c_piix4
[ 56.979521] xhci_pci_renesas libahci video
[ 56.979541] ---[ end trace cb8f6a346f18da7b ]---

Instead of finding MFD hotplugged device by its name, simply iterate
over the child devices to avoid the issue.

Squash in unused variable removal (Alex)

BugLink: https://bugs.launchpad.net/bugs/1920674
Fixes: 25030321ba28 ("drm/amd: add pm domain for ACP IP sub blocks")
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1f600723 Tue Jul 20 12:22:15 CDT 2021 Kai-Heng Feng <kai.heng.feng@canonical.com> drm/amdgpu/acp: Make PM domain really work

[ Upstream commit aff890288de2d818e4f83ec40c9315e2d735df07 ]

Devices created by mfd_add_hotplug_devices() don't really increase the
index of its name, so get_mfd_cell_dev() cannot find any device, hence a
NULL dev is passed to pm_genpd_add_device():
[ 56.974926] (NULL device *): amdgpu: device acp_audio_dma.0.auto added to pm domain
[ 56.974933] (NULL device *): amdgpu: Failed to add dev to genpd
[ 56.974941] [drm:amdgpu_device_ip_init [amdgpu]] *ERROR* hw_init of IP block <acp_ip> failed -22
[ 56.975810] amdgpu 0000:00:01.0: amdgpu: amdgpu_device_ip_init failed
[ 56.975839] amdgpu 0000:00:01.0: amdgpu: Fatal error during GPU init
[ 56.977136] ------------[ cut here ]------------
[ 56.977143] kernel BUG at mm/slub.c:4206!
[ 56.977158] invalid opcode: 0000 [#1] SMP NOPTI
[ 56.977167] CPU: 1 PID: 1648 Comm: modprobe Not tainted 5.12.0-051200rc8-generic #202104182230
[ 56.977175] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./FM2A68M-HD+, BIOS P5.20 02/13/2019
[ 56.977180] RIP: 0010:kfree+0x3bf/0x410
[ 56.977195] Code: 89 e7 48 d3 e2 f7 da e8 5f 0d 02 00 80 e7 02 75 3e 44 89 ee 4c 89 e7 e8 ef 5f fd ff e9 fa fe ff ff 49 8b 44 24 08 a8 01 75 b7 <0f> 0b 4c 8b 4d b0 48 8b 4d a8 48 89 da 4c 89 e6 41 b8 01 00 00 00
[ 56.977202] RSP: 0018:ffffa48640ff79f0 EFLAGS: 00010246
[ 56.977210] RAX: 0000000000000000 RBX: ffff9286127d5608 RCX: 0000000000000000
[ 56.977215] RDX: 0000000000000000 RSI: ffffffffc099d0fb RDI: ffff9286127d5608
[ 56.977220] RBP: ffffa48640ff7a48 R08: 0000000000000001 R09: 0000000000000001
[ 56.977224] R10: 0000000000000000 R11: ffff9286087d8458 R12: fffff3ae0449f540
[ 56.977229] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[ 56.977234] FS: 00007f9de5929540(0000) GS:ffff928612e80000(0000) knlGS:0000000000000000
[ 56.977240] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 56.977245] CR2: 00007f697dd97160 CR3: 00000001110f0000 CR4: 00000000001506e0
[ 56.977251] Call Trace:
[ 56.977261] amdgpu_dm_encoder_destroy+0x1b/0x30 [amdgpu]
[ 56.978056] drm_mode_config_cleanup+0x4f/0x2e0 [drm]
[ 56.978147] ? kfree+0x3dd/0x410
[ 56.978157] ? drm_managed_release+0xc8/0x100 [drm]
[ 56.978232] drm_mode_config_init_release+0xe/0x10 [drm]
[ 56.978311] drm_managed_release+0x9d/0x100 [drm]
[ 56.978388] devm_drm_dev_init_release+0x4d/0x70 [drm]
[ 56.978450] devm_action_release+0x15/0x20
[ 56.978459] release_nodes+0x77/0xc0
[ 56.978469] devres_release_all+0x3f/0x50
[ 56.978477] really_probe+0x245/0x460
[ 56.978485] driver_probe_device+0xe9/0x160
[ 56.978492] device_driver_attach+0xab/0xb0
[ 56.978499] __driver_attach+0x8f/0x150
[ 56.978506] ? device_driver_attach+0xb0/0xb0
[ 56.978513] bus_for_each_dev+0x7e/0xc0
[ 56.978521] driver_attach+0x1e/0x20
[ 56.978528] bus_add_driver+0x135/0x1f0
[ 56.978534] driver_register+0x91/0xf0
[ 56.978540] __pci_register_driver+0x54/0x60
[ 56.978549] amdgpu_init+0x77/0x1000 [amdgpu]
[ 56.979246] ? 0xffffffffc0dbc000
[ 56.979254] do_one_initcall+0x48/0x1d0
[ 56.979265] ? kmem_cache_alloc_trace+0x120/0x230
[ 56.979274] ? do_init_module+0x28/0x280
[ 56.979282] do_init_module+0x62/0x280
[ 56.979288] load_module+0x71c/0x7a0
[ 56.979296] __do_sys_finit_module+0xc2/0x120
[ 56.979305] __x64_sys_finit_module+0x1a/0x20
[ 56.979311] do_syscall_64+0x38/0x90
[ 56.979319] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 56.979328] RIP: 0033:0x7f9de54f989d
[ 56.979335] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48
[ 56.979342] RSP: 002b:00007ffe3c395a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 56.979350] RAX: ffffffffffffffda RBX: 0000560df3ef4330 RCX: 00007f9de54f989d
[ 56.979355] RDX: 0000000000000000 RSI: 0000560df3a07358 RDI: 000000000000000f
[ 56.979360] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000000000000000
[ 56.979365] R10: 000000000000000f R11: 0000000000000246 R12: 0000560df3a07358
[ 56.979369] R13: 0000000000000000 R14: 0000560df3ef4460 R15: 0000560df3ef4330
[ 56.979377] Modules linked in: amdgpu(+) iommu_v2 gpu_sched drm_ttm_helper ttm drm_kms_helper cec rc_core i2c_algo_bit fb_sys_fops syscopyarea sysfillrect sysimgblt nft_counter xt_tcpudp ipt_REJECT nf_reject_ipv4 xt_conntrack iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables libcrc32c nfnetlink ip6_tables iptable_filter bpfilter input_leds binfmt_misc edac_mce_amd kvm_amd ccp kvm snd_hda_codec_realtek snd_hda_codec_generic crct10dif_pclmul snd_hda_codec_hdmi ledtrig_audio ghash_clmulni_intel aesni_intel snd_hda_intel snd_intel_dspcfg snd_seq_midi crypto_simd snd_intel_sdw_acpi cryptd snd_hda_codec snd_seq_midi_event snd_rawmidi snd_hda_core snd_hwdep snd_seq fam15h_power k10temp snd_pcm snd_seq_device snd_timer snd mac_hid soundcore sch_fq_codel nct6775 hwmon_vid drm ip_tables x_tables autofs4 dm_mirror dm_region_hash dm_log hid_generic usbhid hid uas usb_storage r8169 crc32_pclmul realtek ahci xhci_pci i2c_piix4
[ 56.979521] xhci_pci_renesas libahci video
[ 56.979541] ---[ end trace cb8f6a346f18da7b ]---

Instead of finding MFD hotplugged device by its name, simply iterate
over the child devices to avoid the issue.

Squash in unused variable removal (Alex)

BugLink: https://bugs.launchpad.net/bugs/1920674
Fixes: 25030321ba28 ("drm/amd: add pm domain for ACP IP sub blocks")
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
25030321 Mon Nov 23 09:37:30 CST 2015 Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com> drm/amd: add pm domain for ACP IP sub blocks

ACP IP have internal DMA controller, DW I2S controller and DSPs
as separate power tiles. DMA and I2S devices are added to generic
pm domain, so that entire IP can be powered off/on at appropriate
times. Unused DSPs are made to be powered off though they are powered
on during ACP pm domain power on sequence.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1f600723 Tue Jul 20 12:22:15 CDT 2021 Kai-Heng Feng <kai.heng.feng@canonical.com> drm/amdgpu/acp: Make PM domain really work

[ Upstream commit aff890288de2d818e4f83ec40c9315e2d735df07 ]

Devices created by mfd_add_hotplug_devices() don't really increase the
index of its name, so get_mfd_cell_dev() cannot find any device, hence a
NULL dev is passed to pm_genpd_add_device():
[ 56.974926] (NULL device *): amdgpu: device acp_audio_dma.0.auto added to pm domain
[ 56.974933] (NULL device *): amdgpu: Failed to add dev to genpd
[ 56.974941] [drm:amdgpu_device_ip_init [amdgpu]] *ERROR* hw_init of IP block <acp_ip> failed -22
[ 56.975810] amdgpu 0000:00:01.0: amdgpu: amdgpu_device_ip_init failed
[ 56.975839] amdgpu 0000:00:01.0: amdgpu: Fatal error during GPU init
[ 56.977136] ------------[ cut here ]------------
[ 56.977143] kernel BUG at mm/slub.c:4206!
[ 56.977158] invalid opcode: 0000 [#1] SMP NOPTI
[ 56.977167] CPU: 1 PID: 1648 Comm: modprobe Not tainted 5.12.0-051200rc8-generic #202104182230
[ 56.977175] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./FM2A68M-HD+, BIOS P5.20 02/13/2019
[ 56.977180] RIP: 0010:kfree+0x3bf/0x410
[ 56.977195] Code: 89 e7 48 d3 e2 f7 da e8 5f 0d 02 00 80 e7 02 75 3e 44 89 ee 4c 89 e7 e8 ef 5f fd ff e9 fa fe ff ff 49 8b 44 24 08 a8 01 75 b7 <0f> 0b 4c 8b 4d b0 48 8b 4d a8 48 89 da 4c 89 e6 41 b8 01 00 00 00
[ 56.977202] RSP: 0018:ffffa48640ff79f0 EFLAGS: 00010246
[ 56.977210] RAX: 0000000000000000 RBX: ffff9286127d5608 RCX: 0000000000000000
[ 56.977215] RDX: 0000000000000000 RSI: ffffffffc099d0fb RDI: ffff9286127d5608
[ 56.977220] RBP: ffffa48640ff7a48 R08: 0000000000000001 R09: 0000000000000001
[ 56.977224] R10: 0000000000000000 R11: ffff9286087d8458 R12: fffff3ae0449f540
[ 56.977229] R13: 0000000000000000 R14: dead000000000122 R15: dead000000000100
[ 56.977234] FS: 00007f9de5929540(0000) GS:ffff928612e80000(0000) knlGS:0000000000000000
[ 56.977240] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 56.977245] CR2: 00007f697dd97160 CR3: 00000001110f0000 CR4: 00000000001506e0
[ 56.977251] Call Trace:
[ 56.977261] amdgpu_dm_encoder_destroy+0x1b/0x30 [amdgpu]
[ 56.978056] drm_mode_config_cleanup+0x4f/0x2e0 [drm]
[ 56.978147] ? kfree+0x3dd/0x410
[ 56.978157] ? drm_managed_release+0xc8/0x100 [drm]
[ 56.978232] drm_mode_config_init_release+0xe/0x10 [drm]
[ 56.978311] drm_managed_release+0x9d/0x100 [drm]
[ 56.978388] devm_drm_dev_init_release+0x4d/0x70 [drm]
[ 56.978450] devm_action_release+0x15/0x20
[ 56.978459] release_nodes+0x77/0xc0
[ 56.978469] devres_release_all+0x3f/0x50
[ 56.978477] really_probe+0x245/0x460
[ 56.978485] driver_probe_device+0xe9/0x160
[ 56.978492] device_driver_attach+0xab/0xb0
[ 56.978499] __driver_attach+0x8f/0x150
[ 56.978506] ? device_driver_attach+0xb0/0xb0
[ 56.978513] bus_for_each_dev+0x7e/0xc0
[ 56.978521] driver_attach+0x1e/0x20
[ 56.978528] bus_add_driver+0x135/0x1f0
[ 56.978534] driver_register+0x91/0xf0
[ 56.978540] __pci_register_driver+0x54/0x60
[ 56.978549] amdgpu_init+0x77/0x1000 [amdgpu]
[ 56.979246] ? 0xffffffffc0dbc000
[ 56.979254] do_one_initcall+0x48/0x1d0
[ 56.979265] ? kmem_cache_alloc_trace+0x120/0x230
[ 56.979274] ? do_init_module+0x28/0x280
[ 56.979282] do_init_module+0x62/0x280
[ 56.979288] load_module+0x71c/0x7a0
[ 56.979296] __do_sys_finit_module+0xc2/0x120
[ 56.979305] __x64_sys_finit_module+0x1a/0x20
[ 56.979311] do_syscall_64+0x38/0x90
[ 56.979319] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 56.979328] RIP: 0033:0x7f9de54f989d
[ 56.979335] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48
[ 56.979342] RSP: 002b:00007ffe3c395a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 56.979350] RAX: ffffffffffffffda RBX: 0000560df3ef4330 RCX: 00007f9de54f989d
[ 56.979355] RDX: 0000000000000000 RSI: 0000560df3a07358 RDI: 000000000000000f
[ 56.979360] RBP: 0000000000040000 R08: 0000000000000000 R09: 0000000000000000
[ 56.979365] R10: 000000000000000f R11: 0000000000000246 R12: 0000560df3a07358
[ 56.979369] R13: 0000000000000000 R14: 0000560df3ef4460 R15: 0000560df3ef4330
[ 56.979377] Modules linked in: amdgpu(+) iommu_v2 gpu_sched drm_ttm_helper ttm drm_kms_helper cec rc_core i2c_algo_bit fb_sys_fops syscopyarea sysfillrect sysimgblt nft_counter xt_tcpudp ipt_REJECT nf_reject_ipv4 xt_conntrack iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables libcrc32c nfnetlink ip6_tables iptable_filter bpfilter input_leds binfmt_misc edac_mce_amd kvm_amd ccp kvm snd_hda_codec_realtek snd_hda_codec_generic crct10dif_pclmul snd_hda_codec_hdmi ledtrig_audio ghash_clmulni_intel aesni_intel snd_hda_intel snd_intel_dspcfg snd_seq_midi crypto_simd snd_intel_sdw_acpi cryptd snd_hda_codec snd_seq_midi_event snd_rawmidi snd_hda_core snd_hwdep snd_seq fam15h_power k10temp snd_pcm snd_seq_device snd_timer snd mac_hid soundcore sch_fq_codel nct6775 hwmon_vid drm ip_tables x_tables autofs4 dm_mirror dm_region_hash dm_log hid_generic usbhid hid uas usb_storage r8169 crc32_pclmul realtek ahci xhci_pci i2c_piix4
[ 56.979521] xhci_pci_renesas libahci video
[ 56.979541] ---[ end trace cb8f6a346f18da7b ]---

Instead of finding MFD hotplugged device by its name, simply iterate
over the child devices to avoid the issue.

Squash in unused variable removal (Alex)

BugLink: https://bugs.launchpad.net/bugs/1920674
Fixes: 25030321ba28 ("drm/amd: add pm domain for ACP IP sub blocks")
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
25030321 Mon Nov 23 09:37:30 CST 2015 Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com> drm/amd: add pm domain for ACP IP sub blocks

ACP IP have internal DMA controller, DW I2S controller and DSPs
as separate power tiles. DMA and I2S devices are added to generic
pm domain, so that entire IP can be powered off/on at appropriate
times. Unused DSPs are made to be powered off though they are powered
on during ACP pm domain power on sequence.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
/openbmc/linux/drivers/gpu/drm/amd/acp/
H A DKconfig25030321 Mon Nov 23 09:37:30 CST 2015 Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com> drm/amd: add pm domain for ACP IP sub blocks

ACP IP have internal DMA controller, DW I2S controller and DSPs
as separate power tiles. DMA and I2S devices are added to generic
pm domain, so that entire IP can be powered off/on at appropriate
times. Unused DSPs are made to be powered off though they are powered
on during ACP pm domain power on sequence.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
25030321 Mon Nov 23 09:37:30 CST 2015 Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com> drm/amd: add pm domain for ACP IP sub blocks

ACP IP have internal DMA controller, DW I2S controller and DSPs
as separate power tiles. DMA and I2S devices are added to generic
pm domain, so that entire IP can be powered off/on at appropriate
times. Unused DSPs are made to be powered off though they are powered
on during ACP pm domain power on sequence.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>