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

Message ID 20210604194840.14655-1-hdegoede@redhat.com
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 09:48:39PM +0200, Hans de Goede wrote:
> Make dp_altmode_notify() handle the dp->data.conf == 0 case too,

> rather then having separate code-paths for this in various places

> which call it.

> 

> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> Tested-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> Signed-off-by: Hans de Goede <hdegoede@redhat.com>

> ---

>  drivers/usb/typec/altmodes/displayport.c | 35 +++++++++---------------

>  1 file changed, 13 insertions(+), 22 deletions(-)

> 


Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg KH June 15, 2021, 7:40 a.m. UTC | #2
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 | #3
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