drm/ingenic: Add support for OSD mode

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All Ingenic SoCs starting from the JZ4725B support OSD mode.

In this mode, two separate planes can be used. They can have different
positions and sizes, and one can be overlayed on top of the other.

v2: Use fallthrough; instead of /* fall-through */

v3: - Add custom atomic_tail function to handle case where HW gives no
      VBLANK
    - Use regmap_set_bits() / regmap_clear_bits() when possible
    - Use dma_hwdesc_f{0,1} fields in priv structure instead of array
    - Use dmam_alloc_coherent() instead of dma_alloc_coherent()
    - Use more meaningful 0xf0 / 0xf1 values as DMA descriptors IDs
    - Add a bit more code comments

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200716163846.174790-9-paul@crapouillou.net

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Paul Cercueil 2020-07-16 18:38:43 +02:00

parent 0a746db7ad

commit 3c9bea4ef3

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2 changed files with 288 additions and 50 deletions

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303

drivers/gpu/drm/ingenic/ingenic-drm-drv.c

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35

drivers/gpu/drm/ingenic/ingenic-drm.h

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