[PATCH v2 0/2] drm/tiny: add support for PIXPAPER 4.26 monochrome e-ink panel

[LiangCheng Wang]

This patch series adds support for the Mayqueen Pixpaper 4.26
monochrome e-ink display panel, controlled via SPI.

The series includes:
- Device tree binding updates for the Pixpaper 4.26 panel
- A DRM tiny driver implementation for the Pixpaper 4.26 panel
- A MAINTAINERS update for the Pixpaper DRM drivers and binding

The panel supports 800x480 resolution with XRGB8888 framebuffer
input and uses SPI, along with GPIO lines for reset, busy, and
data/command control.

Tested on:
- Raspberry Pi 5 with Linux kernel 7.1.0-rc1

Feedback is welcome.

Signed-off-by: LiangCheng Wang <zaq14760@xxxxxxxxx>
---
Changes in v2:
- Explain why pixpaper-426m requires a distinct compatible string despite
  sharing the same SPI and GPIO properties with the existing Pixpaper panel.
- Drop the duplicated pixpaper-426m DT binding example.
- Update the binding description for multiple Pixpaper panels.
- Select DRM_GEM_SHMEM_HELPER instead of DRM_GEM_DMA_HELPER for the
  pixpaper-426m driver.
- Link to v1: https://lore.kernel.org/r/20260506-bar-v1-0-12195406f4ef@xxxxxxxxx

---
LiangCheng Wang (2):
      dt-bindings: display: mayqueen,pixpaper: add pixpaper-426m
      drm/tiny: add support for PIXPAPER 4.26 monochrome e-ink panel

 .../bindings/display/mayqueen,pixpaper.yaml        |  13 +-
 MAINTAINERS                                        |   3 +-
 drivers/gpu/drm/tiny/Kconfig                       |  16 +
 drivers/gpu/drm/tiny/Makefile                      |   1 +
 drivers/gpu/drm/tiny/pixpaper-426m.c               | 828 +++++++++++++++++++++
 5 files changed, 855 insertions(+), 6 deletions(-)
---
base-commit: a293ec25d59dd96309058c70df5a4dd0f889a1e4
change-id: 20260505-bar-523f2c3f6939

Best regards,
-- 
LiangCheng Wang <zaq14760@xxxxxxxxx>