disp: msm: dsi: fix kw issues in DSI

Change initializes uninitialized variables and handles null pointer
references in DSI driver.

Change-Id: I24200b4bafc5e0b223d64b1ad66fdebeeea37e99
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>

msm/dsi/dsi_ctrl_hw_cmn.c

@@ -399,13 +399,13 @@ void dsi_ctrl_hw_cmn_setup_cmd_stream(struct dsi_ctrl_hw *ctrl,
 				     u32 vc_id,
 				     struct dsi_rect *roi)
 {
-	u32 width_final, stride_final;
-	u32 height_final;
+	u32 width_final = 0, stride_final = 0;
+	u32 height_final = 0;
 	u32 stream_total = 0, stream_ctrl = 0;
 	u32 reg_ctrl = 0, reg_ctrl2 = 0, data = 0;
 	u32 reg = 0, offset = 0;
-	int pic_width, this_frame_slices, intf_ip_w;
-	u32 pkt_per_line, eol_byte_num, bytes_in_slice;
+	int pic_width = 0, this_frame_slices = 0, intf_ip_w = 0;
+	u32 pkt_per_line = 0, eol_byte_num = 0, bytes_in_slice = 0;
 
 	if (roi && (!roi->w || !roi->h))
 		return;

msm/dsi/dsi_pll.c

@@ -70,10 +70,12 @@ int dsi_pll_init(struct platform_device *pdev, struct dsi_pll_resource **pll)
 	*pll = pll_res;
 
 	label = of_get_property(pdev->dev.of_node, "pll-label", NULL);
-	if (!label)
-		DSI_PLL_INFO(pll_res, "DSI pll label not specified\n");
-	else
-		DSI_PLL_INFO(pll_res, "DSI pll label = %s\n", label);
+	if (!label) {
+		DSI_PLL_ERR(pll_res, "DSI pll label not specified\n");
+		return 0;
+	}
+
+	DSI_PLL_INFO(pll_res, "DSI pll label = %s\n", label);
 
 	/**
 	  * Currently, Only supports 5nm PLL version. Will add