Commit 0ec77bd9 authored by Thomas Zimmermann's avatar Thomas Zimmermann
Browse files

drm/gem: Clear mapping addresses for unused framebuffer planes 



Set the returned mapping address to NULL if a framebuffer plane does
not have a BO associated with it. Likewise, ignore mappings of NULL
during framebuffer unmap operations. Allows users of the functions to
perform unmap operations of certain BOs by themselfes.

Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: default avatarSam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-4-tzimmermann@suse.de
parent f6424ecd

drivers/gpu/drm/drm_gem_framebuffer_helper.c

+5 −1
Original line number Diff line number Diff line
@@ -335,8 +335,10 @@ int drm_gem_fb_vmap(struct drm_framebuffer *fb, 


	for (i = 0; i < DRM_FORMAT_MAX_PLANES; ++i) {

		obj = drm_gem_fb_get_obj(fb, i);

		if (!obj)

		if (!obj) {

			dma_buf_map_clear(&map[i]);

			continue;

		}

		ret = drm_gem_vmap(obj, &map[i]);

		if (ret)

			goto err_drm_gem_vunmap;
@@ -376,6 +378,8 @@ void drm_gem_fb_vunmap(struct drm_framebuffer *fb, 
		obj = drm_gem_fb_get_obj(fb, i);

		if (!obj)

			continue;

		if (dma_buf_map_is_null(&map[i]))

			continue;

		drm_gem_vunmap(obj, &map[i]);

	}

}