[PATCH v2 0/3] drm/rockchip: vop2: Add 8K support for RK3588 vop2

[Chaoyi Chen]

From: Chaoyi Chen <chaoyi.chen at rock-chips.com>

Hi,

This series adds support for 8K output on the RK3588 VOP2. HDMI is not
ready yet, but I believe many people might be interested in this.

8K output on the RK3588 is done by splicing two VPs together, with VP0
outputting the left half of the screen and VP1 the right half. In
addition, 8K planes have to be split in half as well to stay within the
width limit of a single plane. Similarly, there are a few post-processing
details that need to be handled.

Note that splice mode is not only usable for 8K output. This means the
mode can be tested at 4K and even lower resolutions, by simply changing 
this one line:

-#define VOP2_MAX_VP_OUTPUT_WIDTH    4096
+#define VOP2_MAX_VP_OUTPUT_WIDTH    (3840 / 2) /* for 4K test */

And yes, this has been tested at 4K over HDMI on the RK3588 EVB1 :)

Changes in v2:
- Link to v1: https://lore.kernel.org/all/20261022071737.508-1-kernel@airkyi.com/
- Missing removal of the replaced line(Heiko).
- vop2_win_get_pstate(): use the left window's state only in splice mode(Sashiko).
- Reject splice windows already in use by another CRTC(Sashiko).
- Check the splice partner via drm_atomic_get_crtc_state() instead of the runtime flag and unlocked read(Sashiko).
- Set splice_mode_right/left_vp before the error paths of vop2_crtc_atomic_enable()(Sashiko).
- Validate each split half against the min width 4 and max input width; align NV20/NV30 like NV15(Sashiko).
- Latch overlay registers at the left VP's vsync; don't wait for the partner's own cfg-done(Sashiko).
- Program the color key on the window actually being updated(Sashiko).

Cc: Cristian Ciocaltea <cristian.ciocaltea at collabora.com>
Cc: Sebastian Reichel <sebastian.reichel at collabora.com>

---

Chaoyi Chen (3):
  drm/rockchip: vop2: Use drm_format_info_min_pitch() for plane offsets
  drm/rockchip: vop2: Skip UV plane setup for packed YUV formats
  drm/rockchip: vop2: Support 8K output by splicing two video ports

 drivers/gpu/drm/rockchip/rockchip_drm_drv.h  |   5 +
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 535 +++++++++++++++++--
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.h |  66 ++-
 drivers/gpu/drm/rockchip/rockchip_vop2_reg.c | 204 +++++--
 4 files changed, 721 insertions(+), 89 deletions(-)

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2.53.0