linux-kernel - [PATCH v2 0/6] drm/display: hdmi: add drm_hdmi_connector_mode

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Message-Id: <20241101-hdmi-mode-valid-v2-0-a6478fd20fa6@linaro.org>
Date: Fri, 01 Nov 2024 02:25:03 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
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>, 
 Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, 
 Dave Stevenson <dave.stevenson@...pberrypi.com>, 
 Maíra Canal <mcanal@...lia.com>, 
 Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>, 
 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>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Subject: [PATCH v2 0/6] drm/display: hdmi: add
 drm_hdmi_connector_mode_valid()

Several HDMI drivers have common code pice in the .mode_valid function
that validates RGB / 8bpc rate using the TMDS char rate callbacks.

Move this code piece to the common helper and remove the need to perform
this check manually. In case of DRM_BRIDGE_OP_HDMI bridges, they can
skip the check in favour of performing it in drm_bridge_connector.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
Changes in v2:
- Switched drm_hdmi_connector_mode_valid() to use common helper
  (ex-hdmi_clock_valid()) (Maxime)
- Added simple unit tests for drm_hdmi_connector_mode_valid().
- Link to v1: https://lore.kernel.org/r/20241018-hdmi-mode-valid-v1-0-6e49ae4801f7@linaro.org

---
Dmitry Baryshkov (6):
      drm/display: hdmi: add generic mode_valid helper
      drm/sun4i: use drm_hdmi_connector_mode_valid()
      drm/vc4: use drm_hdmi_connector_mode_valid()
      drm/display: bridge_connector: use drm_bridge_connector_mode_valid()
      drm/bridge: lontium-lt9611: drop TMDS char rate check in mode_valid
      drm/bridge: dw-hdmi-qp: replace mode_valid with tmds_char_rate

 drivers/gpu/drm/bridge/lontium-lt9611.c            |   4 +-
 drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c       |  12 +-
 drivers/gpu/drm/display/drm_bridge_connector.c     |  16 +-
 drivers/gpu/drm/display/drm_hdmi_helper.c          |  45 ++++++
 drivers/gpu/drm/display/drm_hdmi_helper_internal.h |  11 ++
 drivers/gpu/drm/display/drm_hdmi_state_helper.c    |  26 +---
 drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c             |  12 +-
 drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c | 168 ++++++++++++++++++++-
 drivers/gpu/drm/vc4/vc4_hdmi.c                     |   4 +-
 include/drm/display/drm_hdmi_helper.h              |   4 +
 10 files changed, 252 insertions(+), 50 deletions(-)
---
base-commit: 623b1e4d2eace0958996995f9f88cb659a6f69dd
change-id: 20241018-hdmi-mode-valid-aaec4428501c

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>