linux-kernel - [PATCH v3 0/5] High color depth support for RK3576/RK3588 HDMI output

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Message-Id: <20251021-rk3588-10bpc-v3-0-3d3eed00a6db@collabora.com>
Date: Tue, 21 Oct 2025 13:19:13 +0300
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: Sandy Huang <hjc@...k-chips.com>, 
 Heiko Stübner <heiko@...ech.de>, 
 Andy Yan <andy.yan@...k-chips.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>, 
 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: kernel@...labora.com, dri-devel@...ts.freedesktop.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Daniel Stone <daniels@...labora.com>
Subject: [PATCH v3 0/5] High color depth support for RK3576/RK3588 HDMI
 output

Since both Rockchip RK3576 and RK3588 SoCs are capable of handling 10
bpc color depth HDMI output and we've already landed the required HDPTX
PHY driver changes to support the setup, let's add the missing bits and
pieces to VOP2, DW HDMI QP encoder and bridge library.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
---
Changes in v3:
- Rebased series onto latest drm-misc-next in order to:
  * Replace HIWORD_UPDATE with FIELD_PREP_WM16 macro
  * Remove dependency on HDMI CEC series
- Unconditionally used DIV_ROUND_CLOSEST_ULL(), as suggested by Daniel;
  also collected his R-b and A-b tags
- Link to v2: https://lore.kernel.org/r/20250825-rk3588-10bpc-v2-0-955622d16985@collabora.com

Changes in v2:
- Replaced patch 'drm/rockchip: vop2: Add high color depth support' with
  'drm/rockchip: vop2: Check bpc before switching DCLK source'
- Rebased series onto next-20250825 while adding the HDMI CEC series as
  a dependency
- Link to v1: https://lore.kernel.org/r/20250721-rk3588-10bpc-v1-0-e95a4abcf482@collabora.com

---
Cristian Ciocaltea (5):
      drm/rockchip: vop2: Check bpc before switching DCLK source
      drm/bridge: dw-hdmi-qp: Handle platform supported formats and color depth
      drm/rockchip: dw_hdmi_qp: Switch to phy_configure()
      drm/rockchip: dw_hdmi_qp: Use bit macros for RK3576 regs
      drm/rockchip: dw_hdmi_qp: Add high color depth support

 drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c   |  11 ++-
 drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c | 108 +++++++++++++++++--------
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c   |  58 +++++++------
 include/drm/bridge/dw_hdmi_qp.h                |   4 +
 4 files changed, 121 insertions(+), 60 deletions(-)
---
base-commit: 7ea0468380216c10b73633b976d33efa8c12d375
change-id: 20250721-rk3588-10bpc-85ff4c228e63