drm/st7586: Use framebuffer dma-buf helpers

Replace dma_buf_begin_cpu_access() with drm_gem_fb_begin_cpu_access();
same for _end_cpu_access(). Remove some boiler-plate code. No functional
changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: David Lechner <david@lechnology.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210716140801.1215-8-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/tiny/st7586.c b/drivers/gpu/drm/tiny/st7586.c
index 1be55bed609ab2d92f4e4125c2ded4cab58906e5..ad0faa8723c20f1715bcc5104357567fc7e7222c 100644 (file)
--- a/drivers/gpu/drm/tiny/st7586.c
+++ b/drivers/gpu/drm/tiny/st7586.c
@@ -6,7 +6,6 @@
  */
 
 #include <linux/delay.h>
-#include <linux/dma-buf.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/property.h>
@@ -21,6 +20,7 @@
 #include <drm/drm_format_helper.h>
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_mipi_dbi.h>
 #include <drm/drm_rect.h>
@@ -92,24 +92,18 @@ static int st7586_buf_copy(void *dst, struct drm_framebuffer *fb,
                           struct drm_rect *clip)
 {
        struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
-       struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
        void *src = cma_obj->vaddr;
        int ret = 0;
 
-       if (import_attach) {
-               ret = dma_buf_begin_cpu_access(import_attach->dmabuf,
-                                              DMA_FROM_DEVICE);
-               if (ret)
-                       return ret;
-       }
+       ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+       if (ret)
+               return ret;
 
        st7586_xrgb8888_to_gray332(dst, src, fb, clip);
 
-       if (import_attach)
-               ret = dma_buf_end_cpu_access(import_attach->dmabuf,
-                                            DMA_FROM_DEVICE);
+       drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
 
-       return ret;
+       return 0;
 }
 
 static void st7586_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)