[PATCH v3 0/6] Add method to describe tile/bit_level_packed formats

[Alexandru-Cosmin Gheorghe]

There has been some discussion about extending drm core to handle
linear tile formats, in the series sent by me here [1] and how to
handle formats that are intended to be used just with
modifiers(particularly AFBC modifiers) on Brian series [2] and on IRC
here [3] and [4].

Hence, this big-merged series:

Patches 1-3: handle tiled formats both in core and in malidp driver,
this is done by extending drm_format_info with three new fields
char_per_block, block_w, block_h and consistently handle in the generic
code paths, both linear tiled formats and normal formats.
What's different from [1] is the interpretation of pitch for tile
formats which has been kept to be the same as for the other formats:
pitch = average_chars_per_pixel * width.

Patches 4-6: Introduce the YUV AFBC formats, the only thing noteworthy
here is that cpp/char_per_block are set to 0 for formats where it's
mandatory to be used together with a non-linear modifier and then that
is used to bypass pitch check in framebuffer_check for formats that
have cpp/char_per_block set to 0.

[1] https://lists.freedesktop.org/archives/dri-devel/2018-September/188245.html
[2] https://lists.freedesktop.org/archives/dri-devel/2018-September/189620.html
[3] https://people.freedesktop.org/~cbrill/dri-log/?channel=dri-devel&highlight_names=&date=2018-09-13&show_html=true
[4] https://people.freedesktop.org/~cbrill/dri-log/?channel=dri-devel&highlight_names=&date=2018-09-14&show_html=true

Alexandru Gheorghe (4):
  drm/fourcc: Add char_per_block, block_w and block_h in drm_format_info
  drm/fourcc: Add fourcc for Mali linear tiled formats
  drm: mali-dp: Enable Mali-DP tiled buffer formats
  drm: Extend framebuffer_check to handle formats with
    cpp/char_per_block 0

Brian Starkey (2):
  drm/fourcc: Add AFBC yuv fourccs for Mali
  drm/afbc: Add AFBC modifier usage documentation

 Documentation/gpu/afbc.rst                   | 233 +++++++++++++++++++
 Documentation/gpu/drivers.rst                |   1 +
 MAINTAINERS                                  |   1 +
 drivers/gpu/drm/arm/malidp_hw.c              |  14 +-
 drivers/gpu/drm/arm/malidp_planes.c          |  23 +-
 drivers/gpu/drm/drm_fb_cma_helper.c          |  21 +-
 drivers/gpu/drm/drm_fb_helper.c              |   6 +
 drivers/gpu/drm/drm_fourcc.c                 |  65 ++++++
 drivers/gpu/drm/drm_framebuffer.c            |  13 +-
 drivers/gpu/drm/drm_gem_framebuffer_helper.c |   4 +-
 include/drm/drm_fourcc.h                     |  29 ++-
 include/uapi/drm/drm_fourcc.h                |  31 +++
 12 files changed, 428 insertions(+), 13 deletions(-)
 create mode 100644 Documentation/gpu/afbc.rst

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2.18.0