[PATCH 3/4] drm/imx/dc: plane: Switch to drm_fb_dma_get_gem_clipped_addr()

[Chen-Yu Tsai]

The hardware is programmed with clipped source and destination dimensions,
but the framebuffer address is calculated using drm_fb_dma_get_gem_addr(),
which uses the full source dimensions. This will not match the source
offset if the top and/or left sides are clipped.

Switch to the new drm_fb_dma_get_gem_clipped_addr(), which provides the
buffer address starting at the clipped boundary.

Fixes: 711a3b878366 ("drm/imx: Add i.MX8qxp Display Controller KMS")
Cc: <stable at vger.kernel.org> # Needs drm_fb_dma_get_gem_clipped_addr()
Signed-off-by: Chen-Yu Tsai <wenst at chromium.org>
---
 drivers/gpu/drm/imx/dc/dc-plane.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/imx/dc/dc-plane.c b/drivers/gpu/drm/imx/dc/dc-plane.c
index dea7404fe659..7bab75d5dedd 100644
--- a/drivers/gpu/drm/imx/dc/dc-plane.c
+++ b/drivers/gpu/drm/imx/dc/dc-plane.c
@@ -65,7 +65,7 @@ static int dc_plane_check_max_source_resolution(struct drm_plane_state *state)
 static int dc_plane_check_fb(struct drm_plane_state *state)
 {
 	struct drm_framebuffer *fb = state->fb;
-	dma_addr_t baseaddr = drm_fb_dma_get_gem_addr(fb, state, 0);
+	dma_addr_t baseaddr = drm_fb_dma_get_gem_clipped_addr(fb, state, 0);
 
 	/* base address alignment */
 	if (baseaddr & 0x3) {
@@ -146,7 +146,7 @@ dc_plane_atomic_update(struct drm_plane *plane, struct drm_atomic_commit *state)
 	src_w = drm_rect_width(&new_state->src) >> 16;
 	src_h = drm_rect_height(&new_state->src) >> 16;
 
-	baseaddr = drm_fb_dma_get_gem_addr(fb, new_state, 0);
+	baseaddr = drm_fb_dma_get_gem_clipped_addr(fb, new_state, 0);
 
 	fu_ops = dc_fu_get_ops(dplane->fu);
 
-- 
2.55.0.979.g7e5102b832-goog