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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2020-02-03 16:52:55 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-02-06 10:32:54 +0100 |
| commit | 80f7c3f77697159bafa259f92ac942f143326e90 (patch) | |
| tree | 8209ec73b500520b1a56cafa01f878f7752fea8b /include/drm/drm_gem_vram_helper.h | |
| parent | drm/virtio: fix vblank handling (diff) | |
| download | linux-80f7c3f77697159bafa259f92ac942f143326e90.tar.xz linux-80f7c3f77697159bafa259f92ac942f143326e90.zip | |
drm/vram: Add helpers to validate a display mode's memory requirements
Devices with low amount of dedicated video memory may not be able
to use all possible display modes, as the framebuffers may not fit
into VRAM. The new helper function drm_vram_helper_mode_valid()
implements a simple test to sort out all display modes that can
not be used in any case. Drivers should call this function from
struct drm_mode_config_funcs.mode_valid.
The functionality was originally implemented by the ast driver, which
is being converted as well.
v2:
* WARN_ON if VRAM memory manager has not been initialized
* documentation fixes
* unexported drm_vram_helper_mode_valid_internal()
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200203155258.9346-2-tzimmermann@suse.de
Diffstat (limited to 'include/drm/drm_gem_vram_helper.h')
| -rw-r--r-- | include/drm/drm_gem_vram_helper.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/drm/drm_gem_vram_helper.h b/include/drm/drm_gem_vram_helper.h index 573e9fd109bf..0f6e47213d8d 100644 --- a/include/drm/drm_gem_vram_helper.h +++ b/include/drm/drm_gem_vram_helper.h @@ -6,6 +6,7 @@ #include <drm/drm_file.h> #include <drm/drm_gem.h> #include <drm/drm_ioctl.h> +#include <drm/drm_modes.h> #include <drm/ttm/ttm_bo_api.h> #include <drm/ttm/ttm_bo_driver.h> #include <drm/ttm/ttm_placement.h> @@ -205,4 +206,12 @@ struct drm_vram_mm *drm_vram_helper_alloc_mm( struct drm_device *dev, uint64_t vram_base, size_t vram_size); void drm_vram_helper_release_mm(struct drm_device *dev); +/* + * Mode-config helpers + */ + +enum drm_mode_status +drm_vram_helper_mode_valid(struct drm_device *dev, + const struct drm_display_mode *mode); + #endif |