diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fb_cma_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_cma_helper.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c index 50abd1faf38f..d2b77b02830d 100644 --- a/drivers/gpu/drm/drm_fb_cma_helper.c +++ b/drivers/gpu/drm/drm_fb_cma_helper.c @@ -260,6 +260,33 @@ struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb, EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_obj); /** + * drm_fb_cma_get_gem_addr() - Get physical address for framebuffer + * @fb: The framebuffer + * @state: Which state of drm plane + * @plane: Which plane + * Return the CMA GEM address for given framebuffer. + * + * This function will usually be called from the PLANE callback functions. + */ +dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb, + struct drm_plane_state *state, + unsigned int plane) +{ + struct drm_fb_cma *fb_cma = to_fb_cma(fb); + dma_addr_t paddr; + + if (plane >= 4) + return 0; + + paddr = fb_cma->obj[plane]->paddr + fb->offsets[plane]; + paddr += fb->format->cpp[plane] * (state->src_x >> 16); + paddr += fb->pitches[plane] * (state->src_y >> 16); + + return paddr; +} +EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_addr); + +/** * drm_fb_cma_prepare_fb() - Prepare CMA framebuffer * @plane: Which plane * @state: Plane state attach fence to |