linux-kernel - [PATCH v2 0/2] Fixup drm_atomic_helper_connector_hdmi

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Message-Id: <20250109-hdmi-conn-null-mode-v2-0-9eeaf1109547@collabora.com>
Date: Thu, 09 Jan 2025 00:03:38 +0200
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: 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>, 
 Dave Stevenson <dave.stevenson@...pberrypi.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: kernel@...labora.com, dri-devel@...ts.freedesktop.org, 
 linux-kernel@...r.kernel.org, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v2 0/2] Fixup drm_atomic_helper_connector_hdmi_check()

Fix a NULL pointer dereference discovered while unloading a DRM module
and provide a couple of tests to make sure the helper works as expected
in case the connector's CRTC is shut down.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
---
Changes in v2:
- Collected R-b tags from Dmitry and Angelo
- Add a 2nd patch providing a couple of KUnit tests (Maxime)
- Link to v1: https://lore.kernel.org/r/20250107-hdmi-conn-null-mode-v1-1-fff4be46d106@collabora.com

---
Cristian Ciocaltea (2):
      drm/connector: hdmi: Handle NULL display mode in state check helper
      drm/tests: hdmi: Add connector's CRTC deactivation tests

 drivers/gpu/drm/display/drm_hdmi_state_helper.c    |   3 +
 drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c | 173 +++++++++++++++++++++
 2 files changed, 176 insertions(+)
---
base-commit: 938fbb16aba8f7b88e0fdcf56f315a5bbad41aad
change-id: 20250107-hdmi-conn-null-mode-be0c5e49ed8c