[PATCH 0/2 v6] drm/mediatek: Add support for 10-bit overlays

[Justin Green]

This patch series adds support for 10-bit overlays to the Mediatek DRM driver.
Specifically, we add support for AR30 and BA30 overlays on MT8195 devices and
lay the groundwork for supporting more 10-bit formats on more devices.

1. Refactor plane initialization logic to allow individual DDP components to
provide their supported pixel formats.

2. Add AR30 and BA30 support to the MT8195 overlay driver.


Version history:
v6:
 * Refactor patch into patch series.
 * Add formats directly to private data.

v5:
* Removed some dead defines.
* Refactored mtk_ovl_set_afbc().

v4:
* Move modifier validation to format_mod_supported function.
* Add modifiers to drm_universal_plane_init() call.
* Make comparisons to DRM_FORMAT_MOD_LINEAR explicit rather than relying on
  DRM_FORMAT_LINEAR being equal to 0.
* Gate AFBC control bit writes on device compatibility.

v3:
* Replaced pitch bitshift math with union based approach.
* Refactored overlay register writes to shared code between non-AFBC and
  AFBC.
* Minor code cleanups.

v2:
* Marked mtk_ovl_set_afbc as static.
* Reflowed some lines to fit column limit.


Justin Green (2):
  drm/mediatek: Refactor pixel format logic
  drm/mediatek: Add support for AR30 and BA30 overlays

 drivers/gpu/drm/mediatek/mtk_disp_drv.h     |  4 +
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c     | 89 +++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_disp_rdma.c    | 38 +++++++++
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c     |  4 +-
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c |  4 +
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 20 +++++
 drivers/gpu/drm/mediatek/mtk_drm_plane.c    | 24 ++----
 drivers/gpu/drm/mediatek/mtk_drm_plane.h    |  3 +-
 8 files changed, 168 insertions(+), 18 deletions(-)

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2.39.1.456.gfc5497dd1b-goog