[PATCH v4 07/13] drm/gm12u320: Use drm_gem_shmem_vmap_local() in damage handling

Thomas Zimmermann
2021-01-08T09:43:34Z

Damage handling in gm12u320 requires a short-term mapping of the source
BO. Use drm_gem_shmem_vmap_local().

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/tiny/gm12u320.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c
index 33f65f4626e5..b0c6e350f2b3 100644
--- a/drivers/gpu/drm/tiny/gm12u320.c
+++ b/drivers/gpu/drm/tiny/gm12u320.c
@@ -265,11 +265,16 @@ static void gm12u320_copy_fb_to_blocks(struct
gm12u320_device *gm12u320)
 	y1 = gm12u320->fb_update.rect.y1;
 	y2 = gm12u320->fb_update.rect.y2;

-	ret = drm_gem_shmem_vmap(fb->obj[0], &map);
+	ret = dma_resv_lock(fb->obj[0]->resv, NULL);
 	if (ret) {
-		GM12U320_ERR("failed to vmap fb: %d\n", ret);
+		GM12U320_ERR("failed to reserve fb: %d\n", ret);
 		goto put_fb;
 	}
+	ret = drm_gem_shmem_vmap_local(fb->obj[0], &map);
+	if (ret) {
+		GM12U320_ERR("failed to vmap fb: %d\n", ret);
+		goto unlock_resv;
+	}
 	vaddr = map.vaddr; /* TODO: Use mapping abstraction properly */

 	if (fb->obj[0]->import_attach) {
@@ -321,8 +326,11 @@ static void gm12u320_copy_fb_to_blocks(struct
gm12u320_device *gm12u320)
 		if (ret)
 			GM12U320_ERR("dma_buf_end_cpu_access err: %d\n", ret);
 	}
+
+unlock_resv:
+	dma_resv_unlock(fb->obj[0]->resv);
 vunmap:
-	drm_gem_shmem_vunmap(fb->obj[0], &map);
+	drm_gem_shmem_vunmap_local(fb->obj[0], &map);
 put_fb:
 	drm_framebuffer_put(fb);
 	gm12u320->fb_update.fb = NULL;
--
2.29.2