drm/imx: Make pipe number unsigned

There's no reason whatsoever why this should ever be negative. The same
goes for the number of pipes added to the DRM device.

Cc: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-4-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
index 09e20ea69419..9211473f62a1 100644
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -39,13 +39,13 @@ struct imx_drm_component {
 struct imx_drm_device {
         struct drm_device                       *drm;
         struct imx_drm_crtc                     *crtc[MAX_CRTC];
-        int                                     pipes;
+        unsigned int                            pipes;
         struct drm_fbdev_cma                    *fbhelper;
 };
 
 struct imx_drm_crtc {
         struct drm_crtc                         *crtc;
-        int                                     pipe;
+        unsigned int                            pipe;
         struct imx_drm_crtc_helper_funcs        imx_drm_helper_funcs;
 };
 
@@ -54,7 +54,7 @@ static int legacyfb_depth = 16;
 module_param(legacyfb_depth, int, 0444);
 #endif
 
-int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
+unsigned int imx_drm_crtc_id(struct imx_drm_crtc *crtc)
 {
         return crtc->pipe;
 }