disp: msm: fix dsi debugbus in-mem logging

Update the dump_mem pointer offset while storing the debugbus
data for the second DSI to avoid overwriting to same memory.
As part of the change, register the DSI ctrl with sde_dbg from
ctrl_init directly, instead of debugfs_init to avoid code replication.

Change-Id: I4089f3038ffa89136eaea956d27270f638a99043
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>

msm/dsi/dsi_ctrl.c

@@ -271,7 +271,6 @@ static int dsi_ctrl_debugfs_init(struct dsi_ctrl *dsi_ctrl,
 {
 	int rc = 0;
 	struct dentry *dir, *state_file, *reg_dump, *cmd_dma_logs;
-	char dbg_name[DSI_DEBUG_NAME_LEN];
 
 	if (!dsi_ctrl || !parent) {
 		DSI_CTRL_ERR(dsi_ctrl, "Invalid params\n");
@@ -334,10 +333,6 @@ static int dsi_ctrl_debugfs_init(struct dsi_ctrl *dsi_ctrl,
 
 	dsi_ctrl->debugfs_root = dir;
 
-	snprintf(dbg_name, DSI_DEBUG_NAME_LEN, "dsi%d_ctrl", dsi_ctrl->cell_index);
-	sde_dbg_reg_register_base(dbg_name, dsi_ctrl->hw.base,
-			msm_iomap_size(dsi_ctrl->pdev, "dsi_ctrl"),
-			msm_get_phys_addr(dsi_ctrl->pdev, "dsi_ctrl"), SDE_DBG_DSI);
 error_remove_dir:
 	debugfs_remove(dir);
 error:
@@ -350,16 +345,8 @@ static int dsi_ctrl_debugfs_deinit(struct dsi_ctrl *dsi_ctrl)
 	return 0;
 }
 #else
-static int dsi_ctrl_debugfs_init(struct dsi_ctrl *dsi_ctrl,
-				 struct dentry *parent)
+static int dsi_ctrl_debugfs_init(struct dsi_ctrl *dsi_ctrl, struct dentry *parent)
 {
-	char dbg_name[DSI_DEBUG_NAME_LEN];
-
-	snprintf(dbg_name, DSI_DEBUG_NAME_LEN, "dsi%d_ctrl", dsi_ctrl->cell_index);
-	sde_dbg_reg_register_base(dbg_name, dsi_ctrl->hw.base,
-			msm_iomap_size(dsi_ctrl->pdev, "dsi_ctrl"),
-			msm_get_phys_addr(dsi_ctrl->pdev, "dsi_ctrl"), SDE_DBG_DSI);
-
 	return 0;
 }
 static int dsi_ctrl_debugfs_deinit(struct dsi_ctrl *dsi_ctrl)
@@ -2316,6 +2303,7 @@ void dsi_ctrl_put(struct dsi_ctrl *dsi_ctrl)
  */
 int dsi_ctrl_drv_init(struct dsi_ctrl *dsi_ctrl, struct dentry *parent)
 {
+	char dbg_name[DSI_DEBUG_NAME_LEN];
 	int rc = 0;
 
 	if (!dsi_ctrl) {
@@ -2337,6 +2325,11 @@ int dsi_ctrl_drv_init(struct dsi_ctrl *dsi_ctrl, struct dentry *parent)
 		goto error;
 	}
 
+	snprintf(dbg_name, DSI_DEBUG_NAME_LEN, "dsi%d_ctrl", dsi_ctrl->cell_index);
+	sde_dbg_reg_register_base(dbg_name, dsi_ctrl->hw.base,
+			msm_iomap_size(dsi_ctrl->pdev, "dsi_ctrl"),
+			msm_get_phys_addr(dsi_ctrl->pdev, "dsi_ctrl"), SDE_DBG_DSI);
+
 error:
 	mutex_unlock(&dsi_ctrl->ctrl_lock);
 	return rc;