[PATCH 0/4] drm/vram: Check display modes against available VRAM

[Thomas Zimmermann]

This adds drm_vram_helper_mode_valid(), which tests a display mode against
the available video memory. It's a helper function to sort out display
modes that cannot be used because of a lack of video memory.

The ast driver already implemented this test for a while. The patchset
converts ast over to the helper and adds the test to the over drivers
that use VRAM helpers; except mgag200. I left out mgag200 as it doesn't
have atomic modesetting yet and needs adjustments to memory management
first.

Thomas Zimmermann (4):
  drm/vram: Add helpers to validate a display mode's memory requirements
  drm/bochs: Implement struct drm_mode_config_funcs.mode_valid
  drm/hibmc: Implement struct drm_mode_config_funcs.mode_valid
  drm/vboxvideo: Implement struct drm_mode_config_funcs.mode_valid

 drivers/gpu/drm/ast/ast_main.c              | 24 +------
 drivers/gpu/drm/bochs/bochs_kms.c           |  1 +
 drivers/gpu/drm/drm_gem_vram_helper.c       | 76 +++++++++++++++++++++
 drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c |  1 +
 drivers/gpu/drm/vboxvideo/vbox_mode.c       |  1 +
 include/drm/drm_gem_vram_helper.h           | 14 ++++
 6 files changed, 94 insertions(+), 23 deletions(-)

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2.25.0