[PATCH 1/5] drm/msm/dpu: Remove unneeded checks from dpu_plane

[Bruce Wang <bzwang-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>]

Removes some checks from dpu_plane.c that will never result in an error.
Subsequent variable assignments become part of the initialization wherever
possible.

Signed-off-by: Bruce Wang <bzwang@chromium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 53 +++--------------------
 1 file changed, 6 insertions(+), 47 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 1ce76460d710..a8d00f57f06a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -229,19 +229,11 @@ static u64 _dpu_plane_get_qos_lut(const struct dpu_qos_lut_tbl *tbl,
 static void _dpu_plane_set_qos_lut(struct drm_plane *plane,
 		struct drm_framebuffer *fb)
 {
-	struct dpu_plane *pdpu;
+	struct dpu_plane *pdpu = to_dpu_plane(plane);
 	const struct dpu_format *fmt = NULL;
 	u64 qos_lut;
 	u32 total_fl = 0, lut_usage;
 
-	if (!plane || !fb) {
-		DPU_ERROR("invalid arguments plane %d fb %d\n",
-				plane != 0, fb != 0);
-		return;
-	}
-
-	pdpu = to_dpu_plane(plane);
-
 	if (!pdpu->pipe_hw || !pdpu->pipe_sblk || !pdpu->catalog) {
 		DPU_ERROR("invalid arguments\n");
 		return;
@@ -290,17 +282,10 @@ static void _dpu_plane_set_qos_lut(struct drm_plane *plane,
 static void _dpu_plane_set_danger_lut(struct drm_plane *plane,
 		struct drm_framebuffer *fb)
 {
-	struct dpu_plane *pdpu;
+	struct dpu_plane *pdpu = to_dpu_plane(plane);
 	const struct dpu_format *fmt = NULL;
 	u32 danger_lut, safe_lut;
 
-	if (!plane || !fb) {
-		DPU_ERROR("invalid arguments\n");
-		return;
-	}
-
-	pdpu = to_dpu_plane(plane);
-
 	if (!pdpu->pipe_hw || !pdpu->pipe_sblk || !pdpu->catalog) {
 		DPU_ERROR("invalid arguments\n");
 		return;
@@ -361,14 +346,7 @@ static void _dpu_plane_set_danger_lut(struct drm_plane *plane,
 static void _dpu_plane_set_qos_ctrl(struct drm_plane *plane,
 	bool enable, u32 flags)
 {
-	struct dpu_plane *pdpu;
-
-	if (!plane) {
-		DPU_ERROR("invalid arguments\n");
-		return;
-	}
-
-	pdpu = to_dpu_plane(plane);
+	struct dpu_plane *pdpu = to_dpu_plane(plane);
 
 	if (!pdpu->pipe_hw || !pdpu->pipe_sblk) {
 		DPU_ERROR("invalid arguments\n");
@@ -452,16 +430,9 @@ static void _dpu_plane_set_ot_limit(struct drm_plane *plane,
 {
 	struct dpu_plane *pdpu;
 	struct dpu_vbif_set_ot_params ot_params;
-	struct msm_drm_private *priv;
+	struct msm_drm_private *priv = plane->dev->dev_private;
 	struct dpu_kms *dpu_kms;
 
-	if (!plane || !plane->dev || !crtc) {
-		DPU_ERROR("invalid arguments plane %d crtc %d\n",
-				plane != 0, crtc != 0);
-		return;
-	}
-
-	priv = plane->dev->dev_private;
 	if (!priv || !priv->kms) {
 		DPU_ERROR("invalid KMS reference\n");
 		return;
@@ -496,15 +467,9 @@ static void _dpu_plane_set_qos_remap(struct drm_plane *plane)
 {
 	struct dpu_plane *pdpu;
 	struct dpu_vbif_set_qos_params qos_params;
-	struct msm_drm_private *priv;
+	struct msm_drm_private *priv = plane->dev->dev_private;
 	struct dpu_kms *dpu_kms;
 
-	if (!plane || !plane->dev) {
-		DPU_ERROR("invalid arguments\n");
-		return;
-	}
-
-	priv = plane->dev->dev_private;
 	if (!priv || !priv->kms) {
 		DPU_ERROR("invalid KMS reference\n");
 		return;
@@ -1737,17 +1702,11 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
 	struct drm_plane *plane = NULL, *master_plane = NULL;
 	const struct dpu_format_extended *format_list;
 	struct dpu_plane *pdpu;
-	struct msm_drm_private *priv;
+	struct msm_drm_private *priv = dev->dev_private;
 	struct dpu_kms *kms;
 	int zpos_max = DPU_ZPOS_MAX;
 	int ret = -EINVAL;
 
-	if (!dev) {
-		DPU_ERROR("[%u]device is NULL\n", pipe);
-		goto exit;
-	}
-
-	priv = dev->dev_private;
 	if (!priv) {
 		DPU_ERROR("[%u]private data is NULL\n", pipe);
 		goto exit;
-- 
2.19.0.397.gdd90340f6a-goog

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