Re: [PATCH v2 0/7] drm/bridge_connector: perform HPD enablement automatically

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On 24/10/2022 18:39, Dmitry Baryshkov wrote:
 From all the drivers using drm_bridge_connector only iMX/dcss and OMAP
DRM driver do a proper work of calling
drm_bridge_connector_en/disable_hpd() in right places. Rather than
teaching each and every driver how to properly handle
drm_bridge_connector's HPD, make that automatic.

Add two additional drm_connector helper funcs: enable_hpd() and
disable_hpd(). Make drm_kms_helper_poll_* functions call them (as this
is the time where the drm_bridge_connector's functions are called by the
drivers too).

Changes since v1:
  - Rebased on top of v6.1-rc1
  - Removed the drm_bridge_connector_enable_hpd() from
    drm_bridge_connector_init()
  - Removed extra underscore prefix from
    drm_bridge_connector_en/disable_hpd() helpers

Dmitry Baryshkov (7):
   drm/poll-helper: merge drm_kms_helper_poll_disable() and _fini()
   drm/probe-helper: enable and disable HPD on connectors
   drm/bridge_connector: rely on drm_kms_helper_poll_* for HPD enablement
   drm/imx/dcss: stop using drm_bridge_connector_en/disable_hpd()
   drm/msm/hdmi: stop using drm_bridge_connector_en/disable_hpd()
   drm/omap: stop using drm_bridge_connector_en/disable_hpd()
   drm/bridge_connector: drop drm_bridge_connector_en/disable_hpd()

  drivers/gpu/drm/drm_bridge_connector.c   | 27 +++-------------
  drivers/gpu/drm/drm_probe_helper.c       | 40 ++++++++++++++++++-----
  drivers/gpu/drm/imx/dcss/dcss-dev.c      |  4 ---
  drivers/gpu/drm/imx/dcss/dcss-kms.c      |  2 --
  drivers/gpu/drm/msm/hdmi/hdmi.c          |  2 --
  drivers/gpu/drm/omapdrm/omap_drv.c       | 41 ------------------------
  include/drm/drm_bridge_connector.h       |  2 --
  include/drm/drm_modeset_helper_vtables.h | 22 +++++++++++++
  8 files changed, 59 insertions(+), 81 deletions(-)


For the series:

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>

This fixes the issue (WARN for "Hot plug detection already enabled") introduced by 09077bc3116581f4d1cb961ec359ad56586e370b, which you revert in the third patch. You could mention this, maybe as a fixes tag and a mention in the description.

 Tomi




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