Generalize variables and function names used for planes composition
(from cursor to plane), since we will reuse the operations for both
cursor and overlay types.

No functional change.

v4:
- use better names for functions of plane composition (Daniel)

Signed-off-by: Melissa Wen <melissa....@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vet...@ffwll.ch>
---
 drivers/gpu/drm/vkms/vkms_composer.c | 31 ++++++++++++++--------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_composer.c 
b/drivers/gpu/drm/vkms/vkms_composer.c
index 66c6842d70db..02642801735d 100644
--- a/drivers/gpu/drm/vkms/vkms_composer.c
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -125,26 +125,26 @@ static void blend(void *vaddr_dst, void *vaddr_src,
        }
 }
 
-static void compose_cursor(struct vkms_composer *cursor_composer,
-                          struct vkms_composer *primary_composer,
-                          void *vaddr_out)
+static void compose_plane(struct vkms_composer *primary_composer,
+                         struct vkms_composer *plane_composer,
+                         void *vaddr_out)
 {
-       struct drm_gem_object *cursor_obj;
-       struct drm_gem_shmem_object *cursor_shmem_obj;
+       struct drm_gem_object *plane_obj;
+       struct drm_gem_shmem_object *plane_shmem_obj;
 
-       cursor_obj = drm_gem_fb_get_obj(&cursor_composer->fb, 0);
-       cursor_shmem_obj = to_drm_gem_shmem_obj(cursor_obj);
+       plane_obj = drm_gem_fb_get_obj(&plane_composer->fb, 0);
+       plane_shmem_obj = to_drm_gem_shmem_obj(plane_obj);
 
-       if (WARN_ON(!cursor_shmem_obj->vaddr))
+       if (WARN_ON(!plane_shmem_obj->vaddr))
                return;
 
-       blend(vaddr_out, cursor_shmem_obj->vaddr,
-             primary_composer, cursor_composer);
+       blend(vaddr_out, plane_shmem_obj->vaddr,
+             primary_composer, plane_composer);
 }
 
-static int compose_planes(void **vaddr_out,
-                         struct vkms_composer *primary_composer,
-                         struct vkms_composer *cursor_composer)
+static int compose_active_planes(void **vaddr_out,
+                                struct vkms_composer *primary_composer,
+                                struct vkms_composer *cursor_composer)
 {
        struct drm_framebuffer *fb = &primary_composer->fb;
        struct drm_gem_object *gem_obj = drm_gem_fb_get_obj(fb, 0);
@@ -164,7 +164,7 @@ static int compose_planes(void **vaddr_out,
        memcpy(*vaddr_out, shmem_obj->vaddr, shmem_obj->base.size);
 
        if (cursor_composer)
-               compose_cursor(cursor_composer, primary_composer, *vaddr_out);
+               compose_plane(primary_composer, cursor_composer, *vaddr_out);
 
        return 0;
 }
@@ -222,7 +222,8 @@ void vkms_composer_worker(struct work_struct *work)
        if (wb_pending)
                vaddr_out = crtc_state->active_writeback;
 
-       ret = compose_planes(&vaddr_out, primary_composer, cursor_composer);
+       ret = compose_active_planes(&vaddr_out, primary_composer,
+                                   cursor_composer);
        if (ret) {
                if (ret == -EINVAL && !wb_pending)
                        kfree(vaddr_out);
-- 
2.30.2

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