linux-kernel - [PATCH v2 0/7] drm/connector: hdmi: Allow using the YUV420 output format

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Message-Id: <20250311-hdmi-conn-yuv-v2-0-fbdb94f02562@collabora.com>
Date: Tue, 11 Mar 2025 12:57:32 +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
Subject: [PATCH v2 0/7] drm/connector: hdmi: Allow using the YUV420 output
 format

Provide the basic support to enable using YUV420 as an RGB fallback when
computing the best output format and color depth.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
---
Changes in v2:
- Provided the missing Fixes tag on first patch (Dmitry)
- Added patch "drm/connector: hdmi: Improve debug message for supported
  format"
- Reworked "drm/connector: hdmi: Use YUV420 output format as an RGB
  fallback" so that the fallback to YUV420 will be attempted only when
  RGB cannot be supported for any of the available color depths (Maxime)
- Added a patch to simplify EDID setup in KUnit cases
- Added two patches extending KUnit coverage for YUV420 by providing
  tests for limited range and max TMDS rate fallback
- Rebased series onto drm-misc-next-2025-03-06
- Link to v1: https://lore.kernel.org/r/20241130-hdmi-conn-yuv-v1-0-254279a08671@collabora.com

---
Cristian Ciocaltea (7):
      drm/connector: hdmi: Evaluate limited range after computing format
      drm/connector: hdmi: Add support for YUV420 format verification
      drm/connector: hdmi: Improve debug message for supported format
      drm/connector: hdmi: Use YUV420 output format as an RGB fallback
      drm/tests: hdmi: Add macros to simplify EDID setup
      drm/tests: hdmi: Add limited range tests for YUV420 mode
      drm/tests: hdmi: Add max TMDS rate fallback tests for YUV420 mode

 drivers/gpu/drm/display/drm_hdmi_state_helper.c    | 115 +++--
 drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c | 479 ++++++++++++++-------
 drivers/gpu/drm/tests/drm_kunit_edid.h             | 222 ++++++++++
 3 files changed, 615 insertions(+), 201 deletions(-)
---
base-commit: 4423e607ff50157aaf088854b145936cbab4d560
change-id: 20241130-hdmi-conn-yuv-e1fa596df768