[PATCH 5.7 098/204] drm/ingenic: Fix incorrect assumption about plane->index

[Greg Kroah-Hartman]

From: Paul Cercueil <paul@xxxxxxxxxxxxxxx>

commit ca43f274e03f91c533643299ae4984965ce03205 upstream.

plane->index is NOT the index of the color plane in a YUV frame.
Actually, a YUV frame is represented by a single drm_plane, even though
it contains three Y, U, V planes.

v2-v3: No change

Cc: stable@xxxxxxxxxxxxxxx # v5.3
Fixes: 90b86fcc47b4 ("DRM: Add KMS driver for the Ingenic JZ47xx SoCs")
Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Reviewed-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20200716163846.174790-1-paul@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/ingenic/ingenic-drm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/ingenic/ingenic-drm.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm.c
@@ -384,7 +384,7 @@ static void ingenic_drm_plane_atomic_upd
 		addr = drm_fb_cma_get_gem_addr(state->fb, state, 0);
 		width = state->src_w >> 16;
 		height = state->src_h >> 16;
-		cpp = state->fb->format->cpp[plane->index];
+		cpp = state->fb->format->cpp[0];
 
 		priv->dma_hwdesc->addr = addr;
 		priv->dma_hwdesc->cmd = width * height * cpp / 4;