Message-ID: <1417018856.3177.6.camel@pengutronix.de>
Subject: Re: [PATCH v13 0/12] dw-hdmi: convert imx hdmi to bridge/dw_hdmi
From: Philipp Zabel <p.zabel@pengutronix.de>
To: Andy Yan <andy.yan@rock-chips.com>
Cc: airlied@linux.ie, heiko@sntech.de, fabio.estevam@freescale.com,
        rmk+kernel@arm.linux.org.uk,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Grant Likely <grant.likely@linaro.org>,
        Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawn.guo@linaro.org>,
        Josh Boyer <jwboyer@redhat.com>, Sean Paul <seanpaul@chromium.org>,
        Inki Dae <inki.dae@samsung.com>, Dave Airlie <airlied@redhat.com>,
        Arnd Bergmann <arnd@arndb.de>, Lucas Stach <l.stach@pengutronix.de>,
        Zubair.Kakakhel@imgtec.com, djkurtz@google.com, ykk@rock-chips.com,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        devel@driverdev.osuosl.org, devicetree@vger.kernel.org,
        linux-rockchip@lists.infradead.org, jay.xu@rock-chips.com,
        Pawel Moll <pawel.moll@arm.com>, mark.yao@rock-chips.com,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>
Date: Wed, 26 Nov 2014 17:20:56 +0100
In-Reply-To: <1417008157-31861-1-git-send-email-andy.yan@rock-chips.com>
References: <1417008157-31861-1-git-send-email-andy.yan@rock-chips.com>
Content-Type: text/plain; charset="UTF-8"
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org

Hi Andy,

I have yet to look at this in more detail, but from a quick test
starting with patch 3, the HDMI display stays black on Nitrogen6X,
and starting with patch 8 I get the following error.

imx-drm display-subsystem: [CONNECTOR:21:HDMI-A-1] drm_connector_register failed: -12
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:851 __clk_disable+0x6c/0x70()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc6+ #8377
Backtrace: 
[<80012414>] (dump_backtrace) from [<80012754>] (show_stack+0x20/0x24)
 r6:00000353 r5:00000000 r4:8083ea08 r3:00000000
[<80012734>] (show_stack) from [<805ae670>] (dump_stack+0x8c/0x9c)
[<805ae5e4>] (dump_stack) from [<80022744>] (warn_slowpath_common+0x80/0x9c)
 r5:00000009 r4:00000000
[<800226c4>] (warn_slowpath_common) from [<8002281c>] (warn_slowpath_null+0x2c/0x34)
 r8:b721c610 r7:b72b0400 r6:b735504c r5:80000113 r4:b735504c
[<800227f0>] (warn_slowpath_null) from [<80458088>] (__clk_disable+0x6c/0x70)
[<8045801c>] (__clk_disable) from [<804581a8>] (clk_disable+0x34/0x40)
 r4:b735504c r3:b700e000
[<80458174>] (clk_disable) from [<803241f0>] (dw_hdmi_imx_unbind+0x30/0x60)
 r5:b7355010 r4:b7219a10
[<803241c0>] (dw_hdmi_imx_unbind) from [<8032fc84>] (component_unbind.isra.3+0x40/0x78)
 r8:b72a1e40 r7:b725f158 r6:b72b0400 r5:b725f158 r4:b725f4c0 r3:803241c0
[<8032fc44>] (component_unbind.isra.3) from [<8032fd44>] (component_unbind_all+0x88/0xb8)
 r5:b725f4c0 r4:b725f140
[<8032fcbc>] (component_unbind_all) from [<80321a3c>] (imx_drm_driver_load+0x100/0x13c)
 r7:b72b05cc r6:fffffff4 r5:b7355010 r4:b72b0400
[<8032193c>] (imx_drm_driver_load) from [<8030c260>] (drm_dev_register+0xb8/0x114)
 r7:b686ad10 r6:00000000 r5:00000000 r4:b72b0400
[<8030c1a8>] (drm_dev_register) from [<8030dd58>] (drm_platform_init+0x54/0xe8)
 r6:80844bf4 r5:b721c600 r4:b72b0400 r3:00000000
[<8030dd04>] (drm_platform_init) from [<803218e8>] (imx_drm_bind+0x20/0x28)
 r6:b725f140 r5:0000000c r4:b686ad70
[<803218c8>] (imx_drm_bind) from [<8032f9b0>] (try_to_bring_up_master.part.2+0xd8/0x118)
[<8032f8d8>] (try_to_bring_up_master.part.2) from [<8032fbe4>] (component_add+0xa0/0x100)
 r8:b72a1c40 r7:80602b6c r6:b72a1e40 r5:808451e8 r4:b725f140 r3:00000000
[<8032fb44>] (component_add) from [<8032330c>] (ipu_drm_probe+0x7c/0x150)
 r7:b682ba10 r6:b77b3cc0 r5:b682ba00 r4:b77b4868
[<80323290>] (ipu_drm_probe) from [<80336640>] (platform_drv_probe+0x54/0xb4)
 r9:00000000 r8:00000000 r7:80844e94 r6:80844e94 r5:fffffdfb r4:b682ba10
[<803365ec>] (platform_drv_probe) from [<803348a8>] (driver_probe_device+0x128/0x25c)
 r7:80844e94 r6:00000000 r5:808bc064 r4:b682ba10
[<80334780>] (driver_probe_device) from [<80334a2c>] (__device_attach+0x50/0x54)
 r8:00000000 r7:b721c410 r6:803349dc r5:b682ba10 r4:80844e94 r3:80336838
[<803349dc>] (__device_attach) from [<80332c34>] (bus_for_each_drv+0x68/0x9c)
 r5:b682ba10 r4:00000000
[<80332bcc>] (bus_for_each_drv) from [<8033473c>] (device_attach+0x84/0x98)
 r6:808454e0 r5:b682ba44 r4:b682ba10
[<803346b8>] (device_attach) from [<80333d14>] (bus_probe_device+0x94/0xb8)
 r6:808454e0 r5:b682ba10 r4:b682ba18 r3:b7046800
[<80333c80>] (bus_probe_device) from [<80331e58>] (device_add+0x450/0x530)
 r6:b682ba10 r5:00000000 r4:b682ba18 r3:00000000
[<80331a08>] (device_add) from [<803362c8>] (platform_device_add+0xc4/0x228)
 r9:00000006 r8:b721c410 r7:b7079cc4 r6:b682ba10 r5:b682ba00 r4:00000000
[<80336204>] (platform_device_add) from [<80336b60>] (platform_device_register_full+0xcc/0xf0)
 r7:b7079cc4 r6:b7079ce0 r5:b682ba00 r4:b7079ce0
[<80336a94>] (platform_device_register_full) from [<80328354>] (ipu_add_client_devices.isra.10+0x164/0x19c)
 r5:00000000 r4:b7079ce0
[<803281f0>] (ipu_add_client_devices.isra.10) from [<80328940>] (ipu_probe+0x5b4/0x740)
 r10:808450d4 r9:00000001 r8:b7028180 r7:b72b0010 r6:808450d4 r5:00000000
 r4:b721c410
[<8032838c>] (ipu_probe) from [<80336640>] (platform_drv_probe+0x54/0xb4)
 r10:00000000 r9:b725f580 r8:00000000 r7:80845078 r6:80845078 r5:fffffdfb
 r4:b721c410
[<803365ec>] (platform_drv_probe) from [<803348a8>] (driver_probe_device+0x128/0x25c)
 r7:80845078 r6:00000000 r5:808bc064 r4:b721c410
[<80334780>] (driver_probe_device) from [<80334acc>] (__driver_attach+0x9c/0xa0)
 r8:807ab5e8 r7:00000000 r6:b721c444 r5:80845078 r4:b721c410 r3:00000000
[<80334a30>] (__driver_attach) from [<80332b6c>] (bus_for_each_dev+0x70/0xa4)
 r6:80334a30 r5:80845078 r4:00000000 r3:b704685c
[<80332afc>] (bus_for_each_dev) from [<80334334>] (driver_attach+0x2c/0x30)
 r6:808454e0 r5:b728d000 r4:80845078
[<80334308>] (driver_attach) from [<80333fac>] (bus_add_driver+0x15c/0x204)
[<80333e50>] (bus_add_driver) from [<803352d4>] (driver_register+0x88/0x108)
 r7:b7078000 r6:807d86c0 r5:8082be60 r4:80845078
[<8033524c>] (driver_register) from [<8033656c>] (__platform_driver_register+0x64/0x6c)
 r5:8082be60 r4:8082be60
[<80336508>] (__platform_driver_register) from [<807d86dc>] (imx_ipu_driver_init+0x1c/0x20)
[<807d86c0>] (imx_ipu_driver_init) from [<80008980>] (do_one_initcall+0x9c/0x1dc)
[<800088e4>] (do_one_initcall) from [<807abe5c>] (kernel_init_freeable+0x144/0x1e8)
 r10:000000aa r9:807f9320 r8:807ab5e8 r7:80868fc0 r6:80868fc0 r5:00000006
 r4:8081aec0
[<807abd18>] (kernel_init_freeable) from [<805a9b44>] (kernel_init+0x1c/0xf8)
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:805a9b28
 r4:00008fc0
[<805a9b28>] (kernel_init) from [<8000eb38>] (ret_from_fork+0x14/0x20)
 r4:00000000 r3:b7078000
---[ end trace 450768ad577083a9 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:760 __clk_unprepare+0x78/0x90()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W      3.18.0-rc6+ #8377
Backtrace: 
[<80012414>] (dump_backtrace) from [<80012754>] (show_stack+0x20/0x24)
 r6:000002f8 r5:00000000 r4:8083ea08 r3:00000000
[<80012734>] (show_stack) from [<805ae670>] (dump_stack+0x8c/0x9c)
[<805ae5e4>] (dump_stack) from [<80022744>] (warn_slowpath_common+0x80/0x9c)
 r5:00000009 r4:00000000
[<800226c4>] (warn_slowpath_common) from [<8002281c>] (warn_slowpath_null+0x2c/0x34)
 r8:b721c610 r7:b72b0400 r6:b735504c r5:b7355010 r4:b735504c
[<800227f0>] (warn_slowpath_null) from [<80458bfc>] (__clk_unprepare+0x78/0x90)
[<80458b84>] (__clk_unprepare) from [<80458c44>] (clk_unprepare+0x30/0x38)
 r4:b735504c r3:0000004c
[<80458c14>] (clk_unprepare) from [<803241f8>] (dw_hdmi_imx_unbind+0x38/0x60)
 r4:b7219a10 r3:0000004c
[<803241c0>] (dw_hdmi_imx_unbind) from [<8032fc84>] (component_unbind.isra.3+0x40/0x78)
 r8:b72a1e40 r7:b725f158 r6:b72b0400 r5:b725f158 r4:b725f4c0 r3:803241c0
[<8032fc44>] (component_unbind.isra.3) from [<8032fd44>] (component_unbind_all+0x88/0xb8)
 r5:b725f4c0 r4:b725f140
[<8032fcbc>] (component_unbind_all) from [<80321a3c>] (imx_drm_driver_load+0x100/0x13c)
 r7:b72b05cc r6:fffffff4 r5:b7355010 r4:b72b0400
[<8032193c>] (imx_drm_driver_load) from [<8030c260>] (drm_dev_register+0xb8/0x114)
 r7:b686ad10 r6:00000000 r5:00000000 r4:b72b0400
[<8030c1a8>] (drm_dev_register) from [<8030dd58>] (drm_platform_init+0x54/0xe8)
 r6:80844bf4 r5:b721c600 r4:b72b0400 r3:00000000
[<8030dd04>] (drm_platform_init) from [<803218e8>] (imx_drm_bind+0x20/0x28)
 r6:b725f140 r5:0000000c r4:b686ad70
[<803218c8>] (imx_drm_bind) from [<8032f9b0>] (try_to_bring_up_master.part.2+0xd8/0x118)
[<8032f8d8>] (try_to_bring_up_master.part.2) from [<8032fbe4>] (component_add+0xa0/0x100)
 r8:b72a1c40 r7:80602b6c r6:b72a1e40 r5:808451e8 r4:b725f140 r3:00000000
[<8032fb44>] (component_add) from [<8032330c>] (ipu_drm_probe+0x7c/0x150)
 r7:b682ba10 r6:b77b3cc0 r5:b682ba00 r4:b77b4868
[<80323290>] (ipu_drm_probe) from [<80336640>] (platform_drv_probe+0x54/0xb4)
 r9:00000000 r8:00000000 r7:80844e94 r6:80844e94 r5:fffffdfb r4:b682ba10
[<803365ec>] (platform_drv_probe) from [<803348a8>] (driver_probe_device+0x128/0x25c)
 r7:80844e94 r6:00000000 r5:808bc064 r4:b682ba10
[<80334780>] (driver_probe_device) from [<80334a2c>] (__device_attach+0x50/0x54)
 r8:00000000 r7:b721c410 r6:803349dc r5:b682ba10 r4:80844e94 r3:80336838
[<803349dc>] (__device_attach) from [<80332c34>] (bus_for_each_drv+0x68/0x9c)
 r5:b682ba10 r4:00000000
[<80332bcc>] (bus_for_each_drv) from [<8033473c>] (device_attach+0x84/0x98)
 r6:808454e0 r5:b682ba44 r4:b682ba10
[<803346b8>] (device_attach) from [<80333d14>] (bus_probe_device+0x94/0xb8)
 r6:808454e0 r5:b682ba10 r4:b682ba18 r3:b7046800
[<80333c80>] (bus_probe_device) from [<80331e58>] (device_add+0x450/0x530)
 r6:b682ba10 r5:00000000 r4:b682ba18 r3:00000000
[<80331a08>] (device_add) from [<803362c8>] (platform_device_add+0xc4/0x228)
 r9:00000006 r8:b721c410 r7:b7079cc4 r6:b682ba10 r5:b682ba00 r4:00000000
[<80336204>] (platform_device_add) from [<80336b60>] (platform_device_register_full+0xcc/0xf0)
 r7:b7079cc4 r6:b7079ce0 r5:b682ba00 r4:b7079ce0
[<80336a94>] (platform_device_register_full) from [<80328354>] (ipu_add_client_devices.isra.10+0x164/0x19c)
 r5:00000000 r4:b7079ce0
[<803281f0>] (ipu_add_client_devices.isra.10) from [<80328940>] (ipu_probe+0x5b4/0x740)
 r10:808450d4 r9:00000001 r8:b7028180 r7:b72b0010 r6:808450d4 r5:00000000
 r4:b721c410
[<8032838c>] (ipu_probe) from [<80336640>] (platform_drv_probe+0x54/0xb4)
 r10:00000000 r9:b725f580 r8:00000000 r7:80845078 r6:80845078 r5:fffffdfb
 r4:b721c410
[<803365ec>] (platform_drv_probe) from [<803348a8>] (driver_probe_device+0x128/0x25c)
 r7:80845078 r6:00000000 r5:808bc064 r4:b721c410
[<80334780>] (driver_probe_device) from [<80334acc>] (__driver_attach+0x9c/0xa0)
 r8:807ab5e8 r7:00000000 r6:b721c444 r5:80845078 r4:b721c410 r3:00000000
[<80334a30>] (__driver_attach) from [<80332b6c>] (bus_for_each_dev+0x70/0xa4)
 r6:80334a30 r5:80845078 r4:00000000 r3:b704685c
[<80332afc>] (bus_for_each_dev) from [<80334334>] (driver_attach+0x2c/0x30)
 r6:808454e0 r5:b728d000 r4:80845078
[<80334308>] (driver_attach) from [<80333fac>] (bus_add_driver+0x15c/0x204)
[<80333e50>] (bus_add_driver) from [<803352d4>] (driver_register+0x88/0x108)
 r7:b7078000 r6:807d86c0 r5:8082be60 r4:80845078
[<8033524c>] (driver_register) from [<8033656c>] (__platform_driver_register+0x64/0x6c)
 r5:8082be60 r4:8082be60
[<80336508>] (__platform_driver_register) from [<807d86dc>] (imx_ipu_driver_init+0x1c/0x20)
[<807d86c0>] (imx_ipu_driver_init) from [<80008980>] (do_one_initcall+0x9c/0x1dc)
[<800088e4>] (do_one_initcall) from [<807abe5c>] (kernel_init_freeable+0x144/0x1e8)
 r10:000000aa r9:807f9320 r8:807ab5e8 r7:80868fc0 r6:80868fc0 r5:00000006
 r4:8081aec0
[<807abd18>] (kernel_init_freeable) from [<805a9b44>] (kernel_init+0x1c/0xf8)
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:805a9b28
 r4:00008fc0
[<805a9b28>] (kernel_init) from [<8000eb38>] (ret_from_fork+0x14/0x20)
 r4:00000000 r3:b7078000
---[ end trace 450768ad577083aa ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:851 __clk_disable+0x6c/0x70()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W      3.18.0-rc6+ #8377
Backtrace: 
[<80012414>] (dump_backtrace) from [<80012754>] (show_stack+0x20/0x24)
 r6:00000353 r5:00000000 r4:8083ea08 r3:00000000
[<80012734>] (show_stack) from [<805ae670>] (dump_stack+0x8c/0x9c)
[<805ae5e4>] (dump_stack) from [<80022744>] (warn_slowpath_common+0x80/0x9c)
 r5:00000009 r4:00000000
[<800226c4>] (warn_slowpath_common) from [<8002281c>] (warn_slowpath_null+0x2c/0x34)
 r8:b721c610 r7:b72b0400 r6:b735504c r5:80000113 r4:b735504c
[<800227f0>] (warn_slowpath_null) from [<80458088>] (__clk_disable+0x6c/0x70)
[<8045801c>] (__clk_disable) from [<804581a8>] (clk_disable+0x34/0x40)
 r4:b735504c r3:b700e000
[<80458174>] (clk_disable) from [<80324204>] (dw_hdmi_imx_unbind+0x44/0x60)
 r5:b735504c r4:b7219a10
[<803241c0>] (dw_hdmi_imx_unbind) from [<8032fc84>] (component_unbind.isra.3+0x40/0x78)
 r8:b72a1e40 r7:b725f158 r6:b72b0400 r5:b725f158 r4:b725f4c0 r3:803241c0
[<8032fc44>] (component_unbind.isra.3) from [<8032fd44>] (component_unbind_all+0x88/0xb8)
 r5:b725f4c0 r4:b725f140
[<8032fcbc>] (component_unbind_all) from [<80321a3c>] (imx_drm_driver_load+0x100/0x13c)
 r7:b72b05cc r6:fffffff4 r5:b7355010 r4:b72b0400
[<8032193c>] (imx_drm_driver_load) from [<8030c260>] (drm_dev_register+0xb8/0x114)
 r7:b686ad10 r6:00000000 r5:00000000 r4:b72b0400
[<8030c1a8>] (drm_dev_register) from [<8030dd58>] (drm_platform_init+0x54/0xe8)
 r6:80844bf4 r5:b721c600 r4:b72b0400 r3:00000000
[<8030dd04>] (drm_platform_init) from [<803218e8>] (imx_drm_bind+0x20/0x28)
 r6:b725f140 r5:0000000c r4:b686ad70
[<803218c8>] (imx_drm_bind) from [<8032f9b0>] (try_to_bring_up_master.part.2+0xd8/0x118)
[<8032f8d8>] (try_to_bring_up_master.part.2) from [<8032fbe4>] (component_add+0xa0/0x100)
 r8:b72a1c40 r7:80602b6c r6:b72a1e40 r5:808451e8 r4:b725f140 r3:00000000
[<8032fb44>] (component_add) from [<8032330c>] (ipu_drm_probe+0x7c/0x150)
 r7:b682ba10 r6:b77b3cc0 r5:b682ba00 r4:b77b4868
[<80323290>] (ipu_drm_probe) from [<80336640>] (platform_drv_probe+0x54/0xb4)
 r9:00000000 r8:00000000 r7:80844e94 r6:80844e94 r5:fffffdfb r4:b682ba10
[<803365ec>] (platform_drv_probe) from [<803348a8>] (driver_probe_device+0x128/0x25c)
 r7:80844e94 r6:00000000 r5:808bc064 r4:b682ba10
[<80334780>] (driver_probe_device) from [<80334a2c>] (__device_attach+0x50/0x54)
 r8:00000000 r7:b721c410 r6:803349dc r5:b682ba10 r4:80844e94 r3:80336838
[<803349dc>] (__device_attach) from [<80332c34>] (bus_for_each_drv+0x68/0x9c)
 r5:b682ba10 r4:00000000
[<80332bcc>] (bus_for_each_drv) from [<8033473c>] (device_attach+0x84/0x98)
 r6:808454e0 r5:b682ba44 r4:b682ba10
[<803346b8>] (device_attach) from [<80333d14>] (bus_probe_device+0x94/0xb8)
 r6:808454e0 r5:b682ba10 r4:b682ba18 r3:b7046800
[<80333c80>] (bus_probe_device) from [<80331e58>] (device_add+0x450/0x530)
 r6:b682ba10 r5:00000000 r4:b682ba18 r3:00000000
[<80331a08>] (device_add) from [<803362c8>] (platform_device_add+0xc4/0x228)
 r9:00000006 r8:b721c410 r7:b7079cc4 r6:b682ba10 r5:b682ba00 r4:00000000
[<80336204>] (platform_device_add) from [<80336b60>] (platform_device_register_full+0xcc/0xf0)
 r7:b7079cc4 r6:b7079ce0 r5:b682ba00 r4:b7079ce0
[<80336a94>] (platform_device_register_full) from [<80328354>] (ipu_add_client_devices.isra.10+0x164/0x19c)
 r5:00000000 r4:b7079ce0
[<803281f0>] (ipu_add_client_devices.isra.10) from [<80328940>] (ipu_probe+0x5b4/0x740)
 r10:808450d4 r9:00000001 r8:b7028180 r7:b72b0010 r6:808450d4 r5:00000000
 r4:b721c410
[<8032838c>] (ipu_probe) from [<80336640>] (platform_drv_probe+0x54/0xb4)
 r10:00000000 r9:b725f580 r8:00000000 r7:80845078 r6:80845078 r5:fffffdfb
 r4:b721c410
[<803365ec>] (platform_drv_probe) from [<803348a8>] (driver_probe_device+0x128/0x25c)
 r7:80845078 r6:00000000 r5:808bc064 r4:b721c410
[<80334780>] (driver_probe_device) from [<80334acc>] (__driver_attach+0x9c/0xa0)
 r8:807ab5e8 r7:00000000 r6:b721c444 r5:80845078 r4:b721c410 r3:00000000
[<80334a30>] (__driver_attach) from [<80332b6c>] (bus_for_each_dev+0x70/0xa4)
 r6:80334a30 r5:80845078 r4:00000000 r3:b704685c
[<80332afc>] (bus_for_each_dev) from [<80334334>] (driver_attach+0x2c/0x30)
 r6:808454e0 r5:b728d000 r4:80845078
[<80334308>] (driver_attach) from [<80333fac>] (bus_add_driver+0x15c/0x204)
[<80333e50>] (bus_add_driver) from [<803352d4>] (driver_register+0x88/0x108)
 r7:b7078000 r6:807d86c0 r5:8082be60 r4:80845078
[<8033524c>] (driver_register) from [<8033656c>] (__platform_driver_register+0x64/0x6c)
 r5:8082be60 r4:8082be60
[<80336508>] (__platform_driver_register) from [<807d86dc>] (imx_ipu_driver_init+0x1c/0x20)
[<807d86c0>] (imx_ipu_driver_init) from [<80008980>] (do_one_initcall+0x9c/0x1dc)
[<800088e4>] (do_one_initcall) from [<807abe5c>] (kernel_init_freeable+0x144/0x1e8)
 r10:000000aa r9:807f9320 r8:807ab5e8 r7:80868fc0 r6:80868fc0 r5:00000006
 r4:8081aec0
[<807abd18>] (kernel_init_freeable) from [<805a9b44>] (kernel_init+0x1c/0xf8)
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:805a9b28
 r4:00008fc0
[<805a9b28>] (kernel_init) from [<8000eb38>] (ret_from_fork+0x14/0x20)
 r4:00000000 r3:b7078000
---[ end trace 450768ad577083ab ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:760 __clk_unprepare+0x78/0x90()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W      3.18.0-rc6+ #8377
Backtrace: 
[<80012414>] (dump_backtrace) from [<80012754>] (show_stack+0x20/0x24)
 r6:000002f8 r5:00000000 r4:8083ea08 r3:00000000
[<80012734>] (show_stack) from [<805ae670>] (dump_stack+0x8c/0x9c)
[<805ae5e4>] (dump_stack) from [<80022744>] (warn_slowpath_common+0x80/0x9c)
 r5:00000009 r4:00000000
[<800226c4>] (warn_slowpath_common) from [<8002281c>] (warn_slowpath_null+0x2c/0x34)
 r8:b721c610 r7:b72b0400 r6:b735504c r5:b735504c r4:b735504c
[<800227f0>] (warn_slowpath_null) from [<80458bfc>] (__clk_unprepare+0x78/0x90)
[<80458b84>] (__clk_unprepare) from [<80458c44>] (clk_unprepare+0x30/0x38)
 r4:b735504c r3:000003b5
[<80458c14>] (clk_unprepare) from [<8032420c>] (dw_hdmi_imx_unbind+0x4c/0x60)
 r4:b7219a10 r3:000003b5
[<803241c0>] (dw_hdmi_imx_unbind) from [<8032fc84>] (component_unbind.isra.3+0x40/0x78)
 r8:b72a1e40 r7:b725f158 r6:b72b0400 r5:b725f158 r4:b725f4c0 r3:803241c0
[<8032fc44>] (component_unbind.isra.3) from [<8032fd44>] (component_unbind_all+0x88/0xb8)
 r5:b725f4c0 r4:b725f140
[<8032fcbc>] (component_unbind_all) from [<80321a3c>] (imx_drm_driver_load+0x100/0x13c)
 r7:b72b05cc r6:fffffff4 r5:b7355010 r4:b72b0400
[<8032193c>] (imx_drm_driver_load) from [<8030c260>] (drm_dev_register+0xb8/0x114)
 r7:b686ad10 r6:00000000 r5:00000000 r4:b72b0400
[<8030c1a8>] (drm_dev_register) from [<8030dd58>] (drm_platform_init+0x54/0xe8)
 r6:80844bf4 r5:b721c600 r4:b72b0400 r3:00000000
[<8030dd04>] (drm_platform_init) from [<803218e8>] (imx_drm_bind+0x20/0x28)
 r6:b725f140 r5:0000000c r4:b686ad70
[<803218c8>] (imx_drm_bind) from [<8032f9b0>] (try_to_bring_up_master.part.2+0xd8/0x118)
[<8032f8d8>] (try_to_bring_up_master.part.2) from [<8032fbe4>] (component_add+0xa0/0x100)
 r8:b72a1c40 r7:80602b6c r6:b72a1e40 r5:808451e8 r4:b725f140 r3:00000000
[<8032fb44>] (component_add) from [<8032330c>] (ipu_drm_probe+0x7c/0x150)
 r7:b682ba10 r6:b77b3cc0 r5:b682ba00 r4:b77b4868
[<80323290>] (ipu_drm_probe) from [<80336640>] (platform_drv_probe+0x54/0xb4)
 r9:00000000 r8:00000000 r7:80844e94 r6:80844e94 r5:fffffdfb r4:b682ba10
[<803365ec>] (platform_drv_probe) from [<803348a8>] (driver_probe_device+0x128/0x25c)
 r7:80844e94 r6:00000000 r5:808bc064 r4:b682ba10
[<80334780>] (driver_probe_device) from [<80334a2c>] (__device_attach+0x50/0x54)
 r8:00000000 r7:b721c410 r6:803349dc r5:b682ba10 r4:80844e94 r3:80336838
[<803349dc>] (__device_attach) from [<80332c34>] (bus_for_each_drv+0x68/0x9c)
 r5:b682ba10 r4:00000000
[<80332bcc>] (bus_for_each_drv) from [<8033473c>] (device_attach+0x84/0x98)
 r6:808454e0 r5:b682ba44 r4:b682ba10
[<803346b8>] (device_attach) from [<80333d14>] (bus_probe_device+0x94/0xb8)
 r6:808454e0 r5:b682ba10 r4:b682ba18 r3:b7046800
[<80333c80>] (bus_probe_device) from [<80331e58>] (device_add+0x450/0x530)
 r6:b682ba10 r5:00000000 r4:b682ba18 r3:00000000
[<80331a08>] (device_add) from [<803362c8>] (platform_device_add+0xc4/0x228)
 r9:00000006 r8:b721c410 r7:b7079cc4 r6:b682ba10 r5:b682ba00 r4:00000000
[<80336204>] (platform_device_add) from [<80336b60>] (platform_device_register_full+0xcc/0xf0)
 r7:b7079cc4 r6:b7079ce0 r5:b682ba00 r4:b7079ce0
[<80336a94>] (platform_device_register_full) from [<80328354>] (ipu_add_client_devices.isra.10+0x164/0x19c)
 r5:00000000 r4:b7079ce0
[<803281f0>] (ipu_add_client_devices.isra.10) from [<80328940>] (ipu_probe+0x5b4/0x740)
 r10:808450d4 r9:00000001 r8:b7028180 r7:b72b0010 r6:808450d4 r5:00000000
 r4:b721c410
[<8032838c>] (ipu_probe) from [<80336640>] (platform_drv_probe+0x54/0xb4)
 r10:00000000 r9:b725f580 r8:00000000 r7:80845078 r6:80845078 r5:fffffdfb
 r4:b721c410
[<803365ec>] (platform_drv_probe) from [<803348a8>] (driver_probe_device+0x128/0x25c)
 r7:80845078 r6:00000000 r5:808bc064 r4:b721c410
[<80334780>] (driver_probe_device) from [<80334acc>] (__driver_attach+0x9c/0xa0)
 r8:807ab5e8 r7:00000000 r6:b721c444 r5:80845078 r4:b721c410 r3:00000000
[<80334a30>] (__driver_attach) from [<80332b6c>] (bus_for_each_dev+0x70/0xa4)
 r6:80334a30 r5:80845078 r4:00000000 r3:b704685c
[<80332afc>] (bus_for_each_dev) from [<80334334>] (driver_attach+0x2c/0x30)
 r6:808454e0 r5:b728d000 r4:80845078
[<80334308>] (driver_attach) from [<80333fac>] (bus_add_driver+0x15c/0x204)
[<80333e50>] (bus_add_driver) from [<803352d4>] (driver_register+0x88/0x108)
 r7:b7078000 r6:807d86c0 r5:8082be60 r4:80845078
[<8033524c>] (driver_register) from [<8033656c>] (__platform_driver_register+0x64/0x6c)
 r5:8082be60 r4:8082be60
[<80336508>] (__platform_driver_register) from [<807d86dc>] (imx_ipu_driver_init+0x1c/0x20)
[<807d86c0>] (imx_ipu_driver_init) from [<80008980>] (do_one_initcall+0x9c/0x1dc)
[<800088e4>] (do_one_initcall) from [<807abe5c>] (kernel_init_freeable+0x144/0x1e8)
 r10:000000aa r9:807f9320 r8:807ab5e8 r7:80868fc0 r6:80868fc0 r5:00000006
 r4:8081aec0
[<807abd18>] (kernel_init_freeable) from [<805a9b44>] (kernel_init+0x1c/0xf8)
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:805a9b28
 r4:00008fc0
[<805a9b28>] (kernel_init) from [<8000eb38>] (ret_from_fork+0x14/0x20)
 r4:00000000 r3:b7078000
---[ end trace 450768ad577083ac ]---
imx-ipuv3-crtc: probe of imx-ipuv3-crtc.5 failed with error -12

regards
Philipp

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