linux-kernel - [PATCH 0/4] drm/display: hdmi: provide common code to get Audio Clock Recovery params

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Message-Id: <20250309-drm-hdmi-acr-v1-0-bb9c242f4d4b@linaro.org>
Date: Sun, 09 Mar 2025 10:13:55 +0200
From: Dmitry Baryshkov <lumag@...nel.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>, 
 Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Sean Paul <sean@...rly.run>, Marijn Suijten <marijn.suijten@...ainline.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>, Jernej Skrabec <jernej.skrabec@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org
Subject: [PATCH 0/4] drm/display: hdmi: provide common code to get Audio
 Clock Recovery params

HDMI standards define a recommended set of values to be used for Audio
Clock Regeneration. Nevertheless, each HDMI driver dealing with audio
implements its own way to determine those values. Implement a common
helper and use it for MSM HDMI (tested), VC4 and DW-HDMI (compile-tested
only) drivers.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
Dmitry Baryshkov (4):
      drm/display: hdmi: provide central data authority for ACR params
      drm/msm/hdmi: use new helper for ACR tables
      drm/vc4: use new helper to get ACR values
      drm: bridge: dw-hdmi: use new helper to get ACR values

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c |  90 ++--------------
 drivers/gpu/drm/display/drm_hdmi_helper.c | 164 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/msm/hdmi/hdmi_audio.c     | 107 ++-----------------
 drivers/gpu/drm/vc4/vc4_hdmi.c            |  10 +-
 drivers/gpu/drm/vc4/vc4_hdmi.h            |   7 ++
 include/drm/display/drm_hdmi_helper.h     |   6 ++
 6 files changed, 197 insertions(+), 187 deletions(-)
---
base-commit: 0a2f889128969dab41861b6e40111aa03dc57014
change-id: 20250308-drm-hdmi-acr-7ad1f0d012df

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