[PATCH] drm/mipi-dbi: Fix source-buffer address in mipi_dbi_buf_copy

[Thomas Zimmermann]

Set the source-buffer address after mapping the buffer into the
kernel's address space. Makes MIPI DBI helpers work again.

Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
Fixes: c47160d8edcd ("drm/mipi-dbi: Remove dependency on GEM CMA helper 
library")
Reported-by: Noralf Trønnes <nor...@tronnes.org>
Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Maxime Ripard <mrip...@kernel.org>
---
 drivers/gpu/drm/drm_mipi_dbi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_mipi_dbi.c b/drivers/gpu/drm/drm_mipi_dbi.c
index ded8968b3e8a..0327d595e028 100644
--- a/drivers/gpu/drm/drm_mipi_dbi.c
+++ b/drivers/gpu/drm/drm_mipi_dbi.c
@@ -209,11 +209,11 @@ int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer 
*fb,
        ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
        if (ret)
                return ret;
-       src = data[0].vaddr; /* TODO: Use mapping abstraction properly */
 
        ret = drm_gem_fb_vmap(fb, map, data);
        if (ret)
                goto out_drm_gem_fb_end_cpu_access;
+       src = data[0].vaddr; /* TODO: Use mapping abstraction properly */
 
        switch (fb->format->format) {
        case DRM_FORMAT_RGB565:
-- 
2.34.1