drm/exynos: preset zpos value for overlay planes

Usually userspace don't want to have two overlay planes on the same zpos
so this change assign a different zpos for each plane. Before this change
a zpos of value zero was created for all planes so the userspace had to
set up the zpos of every plane it wanted to use.

Also all places that were storing zpos positions are now unsigned int.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 7 insertions, 13 deletions

diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
index c5dfd99653d8..84a3638c69a6 100644
--- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c
+++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
@@ -378,7 +378,7 @@ static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
  * @protect: 1 to protect (disable updates)
  */
 static void decon_shadow_protect_win(struct decon_context *ctx,
-							int win, bool protect)
+				     unsigned int win, bool protect)
 {
 	u32 bits, val;
 
@@ -392,12 +392,12 @@ static void decon_shadow_protect_win(struct decon_context *ctx,
 	writel(val, ctx->regs + SHADOWCON);
 }
 
-static void decon_win_commit(struct exynos_drm_crtc *crtc, int zpos)
+static void decon_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
 {
 	struct decon_context *ctx = crtc->ctx;
 	struct drm_display_mode *mode = &crtc->base.mode;
 	struct exynos_drm_plane *plane;
-	int padding, win = zpos;
+	int padding;
 	unsigned long val, alpha;
 	unsigned int last_x;
 	unsigned int last_y;
@@ -405,9 +405,6 @@ static void decon_win_commit(struct exynos_drm_crtc *crtc, int zpos)
 	if (ctx->suspended)
 		return;
 
-	if (win == DEFAULT_ZPOS)
-		win = ctx->default_win;
-
 	if (win < 0 || win >= WINDOWS_NR)
 		return;
 
@@ -513,16 +510,12 @@ static void decon_win_commit(struct exynos_drm_crtc *crtc, int zpos)
 	plane->enabled = true;
 }
 
-static void decon_win_disable(struct exynos_drm_crtc *crtc, int zpos)
+static void decon_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
 {
 	struct decon_context *ctx = crtc->ctx;
 	struct exynos_drm_plane *plane;
-	int win = zpos;
 	u32 val;
 
-	if (win == DEFAULT_ZPOS)
-		win = ctx->default_win;
-
 	if (win < 0 || win >= WINDOWS_NR)
 		return;
 
@@ -764,7 +757,8 @@ static int decon_bind(struct device *dev, struct device *master, void *data)
 	struct drm_device *drm_dev = data;
 	struct exynos_drm_plane *exynos_plane;
 	enum drm_plane_type type;
-	int zpos, ret;
+	unsigned int zpos;
+	int ret;
 
 	ret = decon_ctx_initialize(ctx, drm_dev);
 	if (ret) {
@@ -776,7 +770,7 @@ static int decon_bind(struct device *dev, struct device *master, void *data)
 		type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
 						DRM_PLANE_TYPE_OVERLAY;
 		ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
-					1 << ctx->pipe, type);
+					1 << ctx->pipe, type, zpos);
 		if (ret)
 			return ret;
 	}