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b09069046d
This function can be used by drivers that use damage clips and have
CMA GEM objects backed by non-coherent memory. Calling this function
in a plane's .atomic_update ensures that all the data in the backing
memory have been written to RAM.
v3: - Only sync data if using GEM objects backed by non-coherent memory.
- Use a drm_device pointer instead of device pointer in prototype
v5: - Rename to drm_fb_cma_sync_non_coherent
- Invert loops for better cache locality
- Only sync BOs that have the non-coherent flag
- Move to drm_fb_cma_helper.c to avoid circular dependency
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210523170415.90410-3-paul@crapouillou.net
23 lines
575 B
C
23 lines
575 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __DRM_FB_CMA_HELPER_H__
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#define __DRM_FB_CMA_HELPER_H__
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#include <linux/types.h>
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struct drm_device;
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struct drm_framebuffer;
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struct drm_plane_state;
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struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
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unsigned int plane);
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dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb,
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struct drm_plane_state *state,
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unsigned int plane);
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void drm_fb_cma_sync_non_coherent(struct drm_device *drm,
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struct drm_plane_state *old_state,
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struct drm_plane_state *state);
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#endif
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