This patchset converts mgag200 to atomic modesetting. It uses simple
KMS helpers and SHMEM.
Patch 1 removes cursor support. The HW cursor is not usable with the
way universal planes work.
Patches 2 to 11 untangle the existing modesetting code into smaller
functions. Specifically, mode setting and plane updates are being
separated from each other.
Patch 12 to 14 convert mgag200 to simple KMS helpers and enables atomic
mode setting.
Atomically switching plane framebuffers, requires either source or target
buffer to be located at a non-0 offet. As some HW revisions seem to require
a framebuffer offset of 0 within the video memory, they do not work with
atomic modesetting. To resolve this problem, patch 15 converts mgag200
from VRAM helpers to SHMEM helpers. During plane updates, the content of
the SHMEM BO is memcpy'd to VRAM. From my observation, performance is not
nuch different from the original code.
The patchset has been tested on MGA G200EH hardware.
v2:
* rebase patchset
* replace uint{8,32}_t with u{8,32} through-out patchset
* define additional register constants
* use helper functions around bpp-shift computations
* split conversion patch
* cleanups
Thomas Zimmermann (15):
drm/mgag200: Remove HW cursor
drm/mgag200: Clean up mga_set_start_address()
drm/mgag200: Clean up mga_crtc_do_set_base()
drm/mgag200: Move mode-setting code into separate helper function
drm/mgag200: Split MISC register update into PLL selection, SYNC and
I/O
drm/mgag200: Update mode registers after plane registers
drm/mgag200: Set pitch in a separate helper function
drm/mgag200: Set primary plane's format in separate helper function
drm/mgag200: Move TAGFIFO reset into separate function
drm/mgag200: Move hiprilvl setting into separate functions
drm/mgag200: Move register initialization into separate function
drm/mgag200: Remove out-commented suspend/resume helpers
drm/mgag200: Use simple-display data structures
drm/mgag200: Convert to simple KMS helper
drm/mgag200: Replace VRAM helpers with SHMEM helpers
drivers/gpu/drm/mgag200/Kconfig | 4 +-
drivers/gpu/drm/mgag200/Makefile | 2 +-
drivers/gpu/drm/mgag200/mgag200_drv.c | 51 +-
drivers/gpu/drm/mgag200/mgag200_drv.h | 41 +-
drivers/gpu/drm/mgag200/mgag200_main.c | 5 -
drivers/gpu/drm/mgag200/mgag200_mode.c | 871 ++++++++++++++-----------
drivers/gpu/drm/mgag200/mgag200_reg.h | 11 +-
drivers/gpu/drm/mgag200/mgag200_ttm.c | 28 +-
8 files changed, 528 insertions(+), 485 deletions(-)
--
2.26.2
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