mbox series

[0/8] drm + usb-type-c: Add support for out-of-band hotplug notification (v4)

Message ID 20210604194840.14655-1-hdegoede@redhat.com (mailing list archive)
Headers show
Series drm + usb-type-c: Add support for out-of-band hotplug notification (v4) | expand

Message

Hans de Goede June 4, 2021, 7:48 p.m. UTC
Here is v3 of my patchset making DP over Type-C work on devices where the
Type-C controller does not drive the HPD pin on the GPU, but instead
we need to forward HPD events from the Type-C controller to the DRM driver.

Changes in v4:
- Rebase on top of latest drm-tip
- Add forward declaration for struct fwnode_handle to drm_crtc_internal.h
  (fixes warning reported by kernel test robot <lkp@intel.com>)
- Add Heikki's Reviewed-by to patch 7 & 8
- Add Heikki's Tested-by to the series

Changes in v3:
- Base on top of latest drm-tip, which should fix the CI being unable to
  apply (and thus to test) the patches
- Make intel_acpi_assign_connector_fwnodes() take a ref on the fwnode
  it stores in connector->fwnode and have drm_connector_cleanup() put
  this reference
- Drop data argument from drm_connector_oob_hotplug_event()
- Make the Type-C DP altmode code only call drm_connector_oob_hotplug_event()
  when the HPD bit in the status vdo changes
- Drop the platform/x86/intel_cht_int33fe: Correct "displayport" fwnode
  reference patch, this will be merged independently through the pdx86 tree

Changes in v2:
- Replace the bogus "drm/connector: Make the drm_sysfs connector->kdev
  device hold a reference to the connector" patch with:
  "drm/connector: Give connector sysfs devices there own device_type"
  the new patch is a dep for patch 2/9 see the patches

- Stop using a class-dev-iter, instead at a global connector list
  to drm_connector.c and use that to find the connector by the fwnode,
  similar to how we already do this in drm_panel.c and drm_bridge.c

- Make drm_connector_oob_hotplug_event() take a fwnode pointer as
  argument, rather then a drm_connector pointer and let it do the
  lookup itself. This allows making drm_connector_find_by_fwnode() a
  drm-internal function and avoids code outside the drm subsystem
  potentially holding on the a drm_connector reference for a longer
  period.

This series not only touches drm subsys files but it also touches
drivers/usb/typec/altmodes/typec_displayport.c, that file usually
does not see a whole lot of changes. So I believe it would be best
to just merge the entire series through drm-misc, Assuming we can
get an ack from Greg for merging the typec_displayport.c changes
this way.

Regards,

Hans


Hans de Goede (7):
  drm/connector: Give connector sysfs devices there own device_type
  drm/connector: Add a fwnode pointer to drm_connector and register with
    ACPI (v2)
  drm/connector: Add drm_connector_find_by_fwnode() function (v3)
  drm/connector: Add support for out-of-band hotplug notification (v3)
  drm/i915/dp: Add support for out-of-bound hotplug events
  usb: typec: altmodes/displayport: Make dp_altmode_notify() more
    generic
  usb: typec: altmodes/displayport: Notify drm subsys of hotplug events

Heikki Krogerus (1):
  drm/i915: Associate ACPI connector nodes with connector entries (v2)

 drivers/gpu/drm/drm_connector.c              | 79 ++++++++++++++++++
 drivers/gpu/drm/drm_crtc_internal.h          |  2 +
 drivers/gpu/drm/drm_sysfs.c                  | 87 +++++++++++++++++---
 drivers/gpu/drm/i915/display/intel_acpi.c    | 46 +++++++++++
 drivers/gpu/drm/i915/display/intel_acpi.h    |  3 +
 drivers/gpu/drm/i915/display/intel_display.c |  1 +
 drivers/gpu/drm/i915/display/intel_dp.c      | 12 +++
 drivers/usb/typec/altmodes/Kconfig           |  1 +
 drivers/usb/typec/altmodes/displayport.c     | 58 ++++++++-----
 include/drm/drm_connector.h                  | 25 ++++++
 10 files changed, 279 insertions(+), 35 deletions(-)

Comments

Greg KH June 15, 2021, 7:40 a.m. UTC | #1
On Fri, Jun 04, 2021 at 09:48:32PM +0200, Hans de Goede wrote:
> Here is v3 of my patchset making DP over Type-C work on devices where the
> Type-C controller does not drive the HPD pin on the GPU, but instead
> we need to forward HPD events from the Type-C controller to the DRM driver.
> 
> Changes in v4:
> - Rebase on top of latest drm-tip
> - Add forward declaration for struct fwnode_handle to drm_crtc_internal.h
>   (fixes warning reported by kernel test robot <lkp@intel.com>)
> - Add Heikki's Reviewed-by to patch 7 & 8
> - Add Heikki's Tested-by to the series
> 
> Changes in v3:
> - Base on top of latest drm-tip, which should fix the CI being unable to
>   apply (and thus to test) the patches
> - Make intel_acpi_assign_connector_fwnodes() take a ref on the fwnode
>   it stores in connector->fwnode and have drm_connector_cleanup() put
>   this reference
> - Drop data argument from drm_connector_oob_hotplug_event()
> - Make the Type-C DP altmode code only call drm_connector_oob_hotplug_event()
>   when the HPD bit in the status vdo changes
> - Drop the platform/x86/intel_cht_int33fe: Correct "displayport" fwnode
>   reference patch, this will be merged independently through the pdx86 tree
> 
> Changes in v2:
> - Replace the bogus "drm/connector: Make the drm_sysfs connector->kdev
>   device hold a reference to the connector" patch with:
>   "drm/connector: Give connector sysfs devices there own device_type"
>   the new patch is a dep for patch 2/9 see the patches
> 
> - Stop using a class-dev-iter, instead at a global connector list
>   to drm_connector.c and use that to find the connector by the fwnode,
>   similar to how we already do this in drm_panel.c and drm_bridge.c
> 
> - Make drm_connector_oob_hotplug_event() take a fwnode pointer as
>   argument, rather then a drm_connector pointer and let it do the
>   lookup itself. This allows making drm_connector_find_by_fwnode() a
>   drm-internal function and avoids code outside the drm subsystem
>   potentially holding on the a drm_connector reference for a longer
>   period.
> 
> This series not only touches drm subsys files but it also touches
> drivers/usb/typec/altmodes/typec_displayport.c, that file usually
> does not see a whole lot of changes. So I believe it would be best
> to just merge the entire series through drm-misc, Assuming we can
> get an ack from Greg for merging the typec_displayport.c changes
> this way.

No objection from me, I've replied with reviewed-by for those USB
patches now.

thanks,
greg k-h
Hans de Goede June 15, 2021, 8:36 a.m. UTC | #2
Hi,

On 6/15/21 9:40 AM, Greg Kroah-Hartman wrote:
> On Fri, Jun 04, 2021 at 09:48:32PM +0200, Hans de Goede wrote:
>> Here is v3 of my patchset making DP over Type-C work on devices where the
>> Type-C controller does not drive the HPD pin on the GPU, but instead
>> we need to forward HPD events from the Type-C controller to the DRM driver.
>>
>> Changes in v4:
>> - Rebase on top of latest drm-tip
>> - Add forward declaration for struct fwnode_handle to drm_crtc_internal.h
>>   (fixes warning reported by kernel test robot <lkp@intel.com>)
>> - Add Heikki's Reviewed-by to patch 7 & 8
>> - Add Heikki's Tested-by to the series
>>
>> Changes in v3:
>> - Base on top of latest drm-tip, which should fix the CI being unable to
>>   apply (and thus to test) the patches
>> - Make intel_acpi_assign_connector_fwnodes() take a ref on the fwnode
>>   it stores in connector->fwnode and have drm_connector_cleanup() put
>>   this reference
>> - Drop data argument from drm_connector_oob_hotplug_event()
>> - Make the Type-C DP altmode code only call drm_connector_oob_hotplug_event()
>>   when the HPD bit in the status vdo changes
>> - Drop the platform/x86/intel_cht_int33fe: Correct "displayport" fwnode
>>   reference patch, this will be merged independently through the pdx86 tree
>>
>> Changes in v2:
>> - Replace the bogus "drm/connector: Make the drm_sysfs connector->kdev
>>   device hold a reference to the connector" patch with:
>>   "drm/connector: Give connector sysfs devices there own device_type"
>>   the new patch is a dep for patch 2/9 see the patches
>>
>> - Stop using a class-dev-iter, instead at a global connector list
>>   to drm_connector.c and use that to find the connector by the fwnode,
>>   similar to how we already do this in drm_panel.c and drm_bridge.c
>>
>> - Make drm_connector_oob_hotplug_event() take a fwnode pointer as
>>   argument, rather then a drm_connector pointer and let it do the
>>   lookup itself. This allows making drm_connector_find_by_fwnode() a
>>   drm-internal function and avoids code outside the drm subsystem
>>   potentially holding on the a drm_connector reference for a longer
>>   period.
>>
>> This series not only touches drm subsys files but it also touches
>> drivers/usb/typec/altmodes/typec_displayport.c, that file usually
>> does not see a whole lot of changes. So I believe it would be best
>> to just merge the entire series through drm-misc, Assuming we can
>> get an ack from Greg for merging the typec_displayport.c changes
>> this way.
> 
> No objection from me, I've replied with reviewed-by for those USB
> patches now.

Great, thank you.

drm-devs, can I get an ack / reviewed-by for the rest of the series
so that I can push this to drm-misc-next ?

Regards,

Hans