bolero: tx-macro: Fix link status not connected issue due to clk not enabled

Sometimes link status is not connected due to tx_mclk_users
not being properly updated. This is due to tx_mclk_users
enable and disable not being protected by common mutex lock.
Add mutex lock whereever it is accessed to resolve issue.

Change-Id: Ibba208be1f2d3eaf63c49e434c2ae48bc3b5b2d8
Signed-off-by: Vatsal Bucha <[email protected]>

asoc/codecs/bolero/tx-macro.c

@@ -2722,6 +2722,7 @@ static int tx_macro_tx_va_mclk_enable(struct tx_macro_priv *tx_priv,
 			}
 			bolero_clk_rsc_fs_gen_request(tx_priv->dev,
 						  true);
+			mutex_lock(&tx_priv->mclk_lock);
 			if (tx_priv->tx_mclk_users == 0) {
 				regmap_update_bits(regmap,
 					BOLERO_CDC_TX_TOP_CSR_FREQ_MCLK,
@@ -2734,6 +2735,7 @@ static int tx_macro_tx_va_mclk_enable(struct tx_macro_priv *tx_priv,
 					0x01, 0x01);
 			}
 			tx_priv->tx_mclk_users++;
+			mutex_unlock(&tx_priv->mclk_lock);
 		}
 		if (tx_priv->swr_clk_users == 0) {
 			dev_dbg(tx_priv->dev, "%s: reset_swr: %d\n",
@@ -2778,10 +2780,12 @@ static int tx_macro_tx_va_mclk_enable(struct tx_macro_priv *tx_priv,
 		if (clk_type == TX_MCLK)
 			tx_macro_mclk_enable(tx_priv, 0);
 		if (clk_type == VA_MCLK) {
+			mutex_lock(&tx_priv->mclk_lock);
 			if (tx_priv->tx_mclk_users <= 0) {
 				dev_err(tx_priv->dev, "%s: clock already disabled\n",
 						__func__);
 				tx_priv->tx_mclk_users = 0;
+				mutex_unlock(&tx_priv->mclk_lock);
 				goto tx_clk;
 			}
 			tx_priv->tx_mclk_users--;
@@ -2793,7 +2797,7 @@ static int tx_macro_tx_va_mclk_enable(struct tx_macro_priv *tx_priv,
 					BOLERO_CDC_TX_CLK_RST_CTRL_MCLK_CONTROL,
 					0x01, 0x00);
 			}
-
+			mutex_unlock(&tx_priv->mclk_lock);
 			bolero_clk_rsc_fs_gen_request(tx_priv->dev,
 						false);
 			ret = bolero_clk_rsc_request_clock(tx_priv->dev,