drm/sun4i: backend: Use drm_fb_cma_get_gem_addr() to get display memory

Commit 4636ce93d5b2 ("drm/fb-cma-helper: Add drm_fb_cma_get_gem_addr()")
adds a new helper, which covers fetching a drm_framebuffer's GEM object
and calculating the buffer address for a given plane.

This patch uses this helper to replace our own open coded version of the
same function.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171014040252.9621-4-wens@csie.org

1 files changed, 2 insertions, 13 deletions

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 1cc1780f5091..243ddfdc9403 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -209,22 +209,11 @@ int sun4i_backend_update_layer_buffer(struct sun4i_backend *backend,
 {
         struct drm_plane_state *state = plane->state;
         struct drm_framebuffer *fb = state->fb;
-        struct drm_gem_cma_object *gem;
         u32 lo_paddr, hi_paddr;
         dma_addr_t paddr;
-        int bpp;
-
-        /* Get the physical address of the buffer in memory */
-        gem = drm_fb_cma_get_gem_obj(fb, 0);
-
-        DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->paddr);
-
-        /* Compute the start of the displayed memory */
-        bpp = fb->format->cpp[0];
-        paddr = gem->paddr + fb->offsets[0];
-        paddr += (state->src_x >> 16) * bpp;
-        paddr += (state->src_y >> 16) * fb->pitches[0];
 
+        /* Get the start of the displayed memory */
+        paddr = drm_fb_cma_get_gem_addr(fb, state, 0);
         DRM_DEBUG_DRIVER("Setting buffer address to %pad\n", &paddr);
 
         /* Write the 32 lower bits of the address (in bits) */