drm/exynos: 'win' is always unsigned

The index for the hardware layer is always >=0. Previous
code that also used -1 as special index is now gone.

Also apply this to 'ch_enabled' (decon/fimd), since the
variable is on the same line (and is again always unsigned).

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

3 files changed, 9 insertions, 7 deletions

diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
index 3d00df76220d..6714e5b193ea 100644
--- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
@@ -91,7 +91,7 @@ static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc)
 
 static void decon_clear_channel(struct decon_context *ctx)
 {
-        int win, ch_enabled = 0;
+        unsigned int win, ch_enabled = 0;
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index d704f2ba7179..a0edab833148 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -215,7 +215,7 @@ static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
                 DRM_DEBUG_KMS("vblank wait timed out.\n");
 }
 
-static void fimd_enable_video_output(struct fimd_context *ctx, int win,
+static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
                                         bool enable)
 {
         u32 val = readl(ctx->regs + WINCON(win));
@@ -228,7 +228,8 @@ static void fimd_enable_video_output(struct fimd_context *ctx, int win,
         writel(val, ctx->regs + WINCON(win));
 }
 
-static void fimd_enable_shadow_channel_path(struct fimd_context *ctx, int win,
+static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
+                                                unsigned int win,
                                                 bool enable)
 {
         u32 val = readl(ctx->regs + SHADOWCON);
@@ -243,7 +244,7 @@ static void fimd_enable_shadow_channel_path(struct fimd_context *ctx, int win,
 
 static void fimd_clear_channel(struct fimd_context *ctx)
 {
-        int win, ch_enabled = 0;
+        unsigned int win, ch_enabled = 0;
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 285e1569e6ad..8874c1fcb3ab 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -333,7 +333,8 @@ static void mixer_cfg_rgb_fmt(struct mixer_context *ctx, unsigned int height)
         mixer_reg_writemask(res, MXR_CFG, val, MXR_CFG_RGB_FMT_MASK);
 }
 
-static void mixer_cfg_layer(struct mixer_context *ctx, int win, bool enable)
+static void mixer_cfg_layer(struct mixer_context *ctx, unsigned int win,
+                                bool enable)
 {
         struct mixer_resources *res = &ctx->mixer_res;
         u32 val = enable ? ~0 : 0;
@@ -379,7 +380,7 @@ static void mixer_stop(struct mixer_context *ctx)
                 usleep_range(10000, 12000);
 }
 
-static void vp_video_buffer(struct mixer_context *ctx, int win)
+static void vp_video_buffer(struct mixer_context *ctx, unsigned int win)
 {
         struct mixer_resources *res = &ctx->mixer_res;
         unsigned long flags;
@@ -511,7 +512,7 @@ fail:
         return -ENOTSUPP;
 }
 
-static void mixer_graph_buffer(struct mixer_context *ctx, int win)
+static void mixer_graph_buffer(struct mixer_context *ctx, unsigned int win)
 {
         struct mixer_resources *res = &ctx->mixer_res;
         unsigned long flags;