[PATCH v4 00/14] Support 10-bit YUV422 and 8/10-bit YUV420 color format on DW HDMI QP

[Cristian Ciocaltea]

This series extends the output color format support of the Rockchip DW
HDMI QP controller to cover 10-bit YUV 4:2:2 and 8/10-bit YUV 4:2:0.

Patches 1, 7 & 14 improve VOP2 robustness on RK3588, helping recover from
exceptions and preventing random display output glitches observed when
switching modes that also change the color format, e.g. from RGB to YUV
4:2:0 and vice versa.

Patch 8 avoids an incorrect DCLK source switch for 10-bit YUV 4:2:2 by
forcing 8 bpc in the bandwidth check.

Patches 2-6 address a few vop2 related issues reported by Sashiko, while
9-11 are additional cleanups/improvements.

Patch 12 adds MEDIA_BUS_FMT_UYVY10_1X20 for 10-bit YUV 4:2:2 output,
configuring the PHY with 8 bpc.  YUV 4:2:2 always transmits two 12-bit
components per pixel regardless of color depth, so from a clock-rate
perspective it is equivalent to three 8-bit RGB components.

Patch 13 advertises YUV 4:2:0 output, now that the bus-format and VOP2
support are in place.

Tested on Radxa ROCK 5B (RK3588) and Radxa ROCK 4D (RK3576), up to
4K@60Hz YUV 4:2:0 and 4K@30Hz RGB.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
---
Changes in v4:
- Collected T-b tags from Igor
- Rebased onto the latest drm-misc-next, which now contains the HDPTX
  PHY driver fixes, so the runtime dependency has been dropped
- Link to v3: https://patch.msgid.link/20260709-dw-hdmi-qp-yuv-v3-0-a4a982a9f2e7@xxxxxxxxxxxxx

Changes in v3:
- Updated patch 3 to skip any hardware programming in the callbacks
  gated by drm_atomic_helper_commit_planes() after powering down VOP2 on
  an atomic_enable() error (Sashiko)
- Ensured VBLANK events are sent immediately when atomic_enable() fails,
  hence preventing userspace processes waiting for the page flip
  completion to hang indefinitely (new patch 4, Sashiko)
- Rebased onto latest drm-misc-next
- Link to v2: https://patch.msgid.link/20260706-dw-hdmi-qp-yuv-v2-0-b91beb33dedf@xxxxxxxxxxxxx

Changes in v2:
- Collected R-b from Krzysztof on the binding patch, while also fixed
  the property ordering in the example
- Renamed vop2_clk_reset() to vop2_reset_assert_deassert() and used to
  devm_reset_control_get_optional_exclusive() in patch 6 (Philipp Zabel)
- Addressed several issues reported by Sashiko
  * Reset AXI before detaching the IOMMU domain, to close a theoretical
    window where stale or in-flight DMA transactions could fault or
    access memory untranslated after the domain is detached (patch 6)
  * Fixed resource leak on vop2_enable() error path (new patch 2)
  * Balance state on atomic_enable error paths (new patch 3)
  * Avoided division by zero when computing max_dclk (new path 4)
  * Fixed VOP2_MAX_DCLK_RATE overflow on 32-bit (new patch 5)
- Rebased onto latest drm-misc-next
- Link to v1: https://patch.msgid.link/20260617-dw-hdmi-qp-yuv-v1-0-a665cfd06d7d@xxxxxxxxxxxxx

---
Cristian Ciocaltea (14):
      dt-bindings: display: vop2: Add missing reset properties
      drm/rockchip: vop2: Fix resource leak on vop2_enable() error path
      drm/rockchip: vop2: Balance state on atomic_enable() error paths
      drm/rockchip: vop2: Send pending event when atomic_enable() fails
      drm/rockchip: vop2: Avoid division by zero when computing max_dclk
      drm/rockchip: vop2: Fix VOP2_MAX_DCLK_RATE overflow on 32-bit
      drm/rockchip: vop2: Reset AXI and DCLK to improve robustness
      drm/rockchip: vop2: Avoid DCLK source switch for 10-bit YUV422 output
      drm/rockchip: vop2: Consolidate HDMI PHY PLL clock parent switch
      drm/rockchip: vop2: Switch to enum vop_csc_format
      drm/bridge: dw-hdmi-qp: Log resolution and refresh rate in atomic_enable()
      drm/rockchip: dw_hdmi_qp: Support 10-bit YUV422 output format
      drm/rockchip: dw_hdmi_qp: Enable YUV420 output format
      arm64: dts: rockchip: Add RK3588 VOP2 resets

 .../bindings/display/rockchip/rockchip-vop2.yaml   |  46 ++++-
 arch/arm64/boot/dts/rockchip/rk3588-base.dtsi      |  12 ++
 drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c       |  10 +-
 drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c     |  13 +-
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c       | 215 +++++++++++++++------
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.h       |  10 +
 6 files changed, 244 insertions(+), 62 deletions(-)
---
base-commit: 47b823940e38607dad180eb2f82094ae65565a4b
change-id: 20260617-dw-hdmi-qp-yuv-2b0f7bb5ba81