linux-kernel - [PATCH v2 0/8] drm/connector: hdmi: limit infoframes per driver capabilities

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Message-Id: <20250819-drm-limit-infoframes-v2-0-7595dda24fbd@oss.qualcomm.com>
Date: Tue, 19 Aug 2025 21:57:29 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        Andy Yan <andy.yan@...k-chips.com>, Chen-Yu Tsai <wens@...e.org>,
        Samuel Holland <samuel@...lland.org>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Maíra Canal <mcanal@...lia.com>,
        Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>,
        Liu Ying <victor.liu@....com>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org
Subject: [PATCH v2 0/8] drm/connector: hdmi: limit infoframes per driver
 capabilities

It's not uncommon for the particular device to support only a subset of
HDMI InfoFrames. It's not a big problem for the kernel, since we adopted
a model of ignoring the unsupported Infoframes, but it's a bigger
problem for the userspace: we end up having files in debugfs which do
mot match what is being sent on the wire.

Sort that out, making sure that all interfaces are consistent.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
Changes in v2:
- Corrected whitespace / newline issues & other small syntax fixes (Liu
  Ying)
- Added audio to the list of InfoFrames supported by the VC4 driver (Liu
  Ying)
- Changed drm_dbg_kms() to drm_warn_once() in the Audio InfoFrame update
  code (Liu Ying)
- Corrected subject for ITE IT6263 patch (Liu Ying)
- Added patch, dropping default list of InfoFrames in
  drm_bridge_connector.
- Link to v1: https://lore.kernel.org/r/20250816-drm-limit-infoframes-v1-0-6dc17d5f07e9@oss.qualcomm.com

---
Dmitry Baryshkov (8):
      drm/connector: let drivers declare infoframes as unsupported
      drm/bridge: adv7511: declare supported infoframes
      drm/bridge: ite-it6263: declare supported infoframes
      drm/bridge: lontium-lt9611: declare supported infoframes
      drm/bridge: synopsys/dw-hdmi-qp: declare supported infoframes
      drm/msm: hdmi: declare supported infoframes
      drm/rockchip: rk3066: declare supported infoframes
      drm/display: bridge_connector: drop default list for HDMI Infoframes

 drivers/gpu/drm/bridge/adv7511/adv7511_drv.c       |  1 +
 drivers/gpu/drm/bridge/ite-it6263.c                |  1 +
 drivers/gpu/drm/bridge/lontium-lt9611.c            |  4 +++
 drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c       |  3 ++
 drivers/gpu/drm/display/drm_bridge_connector.c     |  1 +
 drivers/gpu/drm/display/drm_hdmi_state_helper.c    | 37 ++++++++++++++++++++--
 drivers/gpu/drm/drm_connector.c                    |  4 +++
 drivers/gpu/drm/drm_debugfs.c                      | 16 +++++++---
 drivers/gpu/drm/msm/hdmi/hdmi_bridge.c             |  4 +++
 drivers/gpu/drm/rockchip/inno_hdmi.c               |  1 +
 drivers/gpu/drm/rockchip/rk3066_hdmi.c             |  1 +
 drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c             |  1 +
 drivers/gpu/drm/tests/drm_connector_test.c         | 28 ++++++++++++++++
 drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c |  8 +++++
 drivers/gpu/drm/vc4/vc4_hdmi.c                     |  5 +++
 include/drm/drm_bridge.h                           |  7 ++++
 include/drm/drm_connector.h                        | 22 +++++++++++++
 17 files changed, 137 insertions(+), 7 deletions(-)
---
base-commit: cb640b2ca54617f4a9d4d6efd5ff2afd6be11f19
change-id: 20250815-drm-limit-infoframes-e782fa7f3360

Best regards,
-- 
With best wishes
Dmitry