[AMD Official Use Only - Internal Distribution Only]
Reviewed-by: Jerry (Fangzhi) Zuo Jerry.Zuo@amd.com
-----Original Message----- From: Alex Deucher alexdeucher@gmail.com Sent: February 26, 2020 10:40 AM To: Zuo, Jerry Jerry.Zuo@amd.com Cc: Liu, Zhan Zhan.Liu@amd.com; Wentland, Harry Harry.Wentland@amd.com; amd-gfx list amd-gfx@lists.freedesktop.org; Maling list - DRI developers dri-devel@lists.freedesktop.org; Deucher, Alexander Alexander.Deucher@amd.com; Broadworth, Mark Mark.Broadworth@amd.com Subject: Re: [PATCH 13/15] drm/amdgpu/display: split dp connector registration (v3)
On Wed, Feb 26, 2020 at 10:36 AM Zuo, Jerry Jerry.Zuo@amd.com wrote:
[AMD Official Use Only - Internal Distribution Only]
Hi Alex:
The patch set works. Please let me know when you push the change to drm-next.
Can someone give me and R-b or A-b on the patches?
Thanks,
Alex
Thanks a lot.Regards, Jerry
-----Original Message----- From: Alex Deucher alexdeucher@gmail.com Sent: February 25, 2020 1:42 PM To: Zuo, Jerry Jerry.Zuo@amd.com Cc: Liu, Zhan Zhan.Liu@amd.com; Wentland, Harry Harry.Wentland@amd.com; amd-gfx list amd-gfx@lists.freedesktop.org; Maling list - DRI developers dri-devel@lists.freedesktop.org; Deucher, Alexander Alexander.Deucher@amd.com; Broadworth, Mark Mark.Broadworth@amd.com Subject: Re: [PATCH 13/15] drm/amdgpu/display: split dp connector registration (v3)
On Tue, Feb 25, 2020 at 1:32 PM Alex Deucher alexdeucher@gmail.com wrote:
On Tue, Feb 25, 2020 at 1:30 PM Zuo, Jerry Jerry.Zuo@amd.com wrote:
[AMD Official Use Only - Internal Distribution Only]
Hi Alex:
It happened when a MST monitor is attached, either in driver load or hotplug later.I think I found the issue. I'll send a patch shortly.
Attaching two patches. I think patch 1 should fix it. Patch 2 is the same patch as before. I'm not sure drm_dp_mst_connector_late_register() is necessary since no other driver calls it.
Alex
Alex
Regards, Jerry
-----Original Message----- From: Alex Deucher alexdeucher@gmail.com Sent: February 25, 2020 1:23 PM To: Liu, Zhan Zhan.Liu@amd.com Cc: Wentland, Harry Harry.Wentland@amd.com; Zuo, Jerry Jerry.Zuo@amd.com; amd-gfx list amd-gfx@lists.freedesktop.org; Maling list - DRI developers dri-devel@lists.freedesktop.org; Deucher, Alexander Alexander.Deucher@amd.com; Broadworth, Mark Mark.Broadworth@amd.com Subject: Re: [PATCH 13/15] drm/amdgpu/display: split dp connector registration (v3)
On Tue, Feb 25, 2020 at 1:20 PM Liu, Zhan Zhan.Liu@amd.com wrote:
-----Original Message----- From: Liu, Zhan Sent: 2020/February/25, Tuesday 10:10 AM To: Alex Deucher alexdeucher@gmail.com; Wentland, Harry Harry.Wentland@amd.com Cc: amd-gfx list amd-gfx@lists.freedesktop.org; Maling list
- DRI developers dri-devel@lists.freedesktop.org; Deucher,
Alexander Alexander.Deucher@amd.com; Broadworth, Mark Mark.Broadworth@amd.com Subject: RE: [PATCH 13/15] drm/amdgpu/display: split dp connector registration (v3)
-----Original Message----- From: Alex Deucher alexdeucher@gmail.com Sent: 2020/February/25, Tuesday 9:07 AM To: Wentland, Harry Harry.Wentland@amd.com Cc: amd-gfx list amd-gfx@lists.freedesktop.org; Maling list
- DRI developers dri-devel@lists.freedesktop.org; Deucher,
Alexander Alexander.Deucher@amd.com; Broadworth, Mark Mark.Broadworth@amd.com; Liu, Zhan Zhan.Liu@amd.com Subject: Re: [PATCH 13/15] drm/amdgpu/display: split dp connector registration (v3)
On Mon, Feb 24, 2020 at 4:09 PM Harry Wentland hwentlan@amd.com wrote: > > On 2020-02-07 4:17 p.m., Alex Deucher wrote: > > Split into init and register functions to avoid a > > segfault in some configs when the load/unload callbacks are removed. > > > > Looks like MST is completely broken with this change with > a NULL pointer dereference in drm_dp_aux_register. > > > v2: > > - add back accidently dropped has_aux setting > > - set dev in late_register > > > > v3: > > - fix dp cec ordering > > > > Signed-off-by: Alex Deucher alexander.deucher@amd.com > > --- > > drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 16 ++++++++++++++++ > > drivers/gpu/drm/amd/amdgpu/atombios_dp.c | 10 ++-------- > > .../amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 7 > > ++++++- > > 3 files changed, 24 insertions(+), 9 deletions(-) > > > > diff --git > > a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c > > b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c > > index ec1501e3a63a..f355d9a752d2 100644 > > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c > > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c > > @@ -1461,6 +1461,20 @@ static enum drm_mode_status amdgpu_connector_dp_mode_valid(struct drm_connector > > return MODE_OK; > > } > > > > +static int > > +amdgpu_connector_late_register(struct drm_connector *connector) { > > + struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector); > > + int r = 0; > > + > > + if (amdgpu_connector->ddc_bus->has_aux) { > > + amdgpu_connector->ddc_bus->aux.dev = > > + amdgpu_connector- >base.kdev; > > + r = drm_dp_aux_register(&amdgpu_connector->ddc_bus->aux); > > + } > > + > > + return r; > > +} > > + > > static const struct drm_connector_helper_funcs amdgpu_connector_dp_helper_funcs = { > > .get_modes = amdgpu_connector_dp_get_modes, > > .mode_valid = amdgpu_connector_dp_mode_valid, @@ > > -1475,6 > > +1489,7 @@ static const struct drm_connector_funcs amdgpu_connector_dp_funcs = { > > .early_unregister = amdgpu_connector_unregister, > > .destroy = amdgpu_connector_destroy, > > .force = amdgpu_connector_dvi_force, > > + .late_register = amdgpu_connector_late_register, > > }; > > > > static const struct drm_connector_funcs > > amdgpu_connector_edp_funcs = { @@ -1485,6 +1500,7 @@ > > static
const
> > struct drm_connector_funcs amdgpu_connector_edp_funcs = { > > .early_unregister = amdgpu_connector_unregister, > > .destroy = amdgpu_connector_destroy, > > .force = amdgpu_connector_dvi_force, > > + .late_register = amdgpu_connector_late_register, > > }; > > > > void > > diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_dp.c > > b/drivers/gpu/drm/amd/amdgpu/atombios_dp.c > > index ea702a64f807..9b74cfdba7b8 100644 > > --- a/drivers/gpu/drm/amd/amdgpu/atombios_dp.c > > +++ b/drivers/gpu/drm/amd/amdgpu/atombios_dp.c > > @@ -186,16 +186,10 @@ > > amdgpu_atombios_dp_aux_transfer(struct > > drm_dp_aux *aux, struct drm_dp_aux_msg *m > > > > void amdgpu_atombios_dp_aux_init(struct > > amdgpu_connector > > *amdgpu_connector) { > > - int ret; > > - > > amdgpu_connector->ddc_bus->rec.hpd = > > amdgpu_connector- >hpd.hpd; > > - amdgpu_connector->ddc_bus->aux.dev = amdgpu_connector- >base.kdev; > > amdgpu_connector->ddc_bus->aux.transfer = amdgpu_atombios_dp_aux_transfer; > > - ret = drm_dp_aux_register(&amdgpu_connector->ddc_bus->aux); > > - if (!ret) > > - amdgpu_connector->ddc_bus->has_aux = true; > > - > > - WARN(ret, "drm_dp_aux_register_i2c_bus() failed with error %d\n", ret); > > + drm_dp_aux_init(&amdgpu_connector->ddc_bus->aux); > > + amdgpu_connector->ddc_bus->has_aux = true; > > } > > > > /***** general DP utility functions *****/ diff --git > > a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_ty > > pe > > s.c > > b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_ty > > pe s.c index 3959c942c88b..d5b9e72f2649 100644 > > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types. c > > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types. c > > @@ -155,6 +155,11 @@ amdgpu_dm_mst_connector_late_register(struct drm_connector *connector) > > struct amdgpu_dm_connector *amdgpu_dm_connector = > > to_amdgpu_dm_connector(connector); > > struct drm_dp_mst_port *port = > > amdgpu_dm_connector->port; > > + int r; > > + > > + r = > > + drm_dp_aux_register(&amdgpu_dm_connector->dm_dp_aux.au > > + x) > > + ; > > This calls drm_dp_aux_register_devnode which is also > called later in drm_dp_mst_connector_late_register. Wonder if that's a problem.
Does this patch help? I'm not too familiar with the MST code and I don't have an MST monitor.
I have an MST monitor and I can give it a spin. I'll get back to you later.
- Jerry who is following up on this issue
Thank you Alex for your patch. Unfortunately, it doesn't solve the issue.
Jerry is following up on this ticket, and I've added him to this email thread.
Can you send me the full dmesg output? Also, does it happen as soon as the driver loads or sometime later?
Alex
Zhan
Zhan
Alex
> > Harry > > > + if (r) > > + return r; > > > > #if defined(CONFIG_DEBUG_FS) > > connector_debugfs_init(amdgpu_dm_connector); > > @@ -484,7 +489,7 @@ void
amdgpu_dm_initialize_dp_connector(struct
amdgpu_display_manager *dm, > > aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer; > > aconnector->dm_dp_aux.ddc_service = > > aconnector->dc_link->ddc; > > > > - drm_dp_aux_register(&aconnector->dm_dp_aux.aux); > > + drm_dp_aux_init(&aconnector->dm_dp_aux.aux); > > drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux, > > &aconnector->base); > > > >