scsi: ufs: host: mediatek: Change ref-clk timeout policy

Update the timeout policy for ref-clk control.

 - If a clock-on operation times out, it is assumed that the clock is
   off. The system will notify TFA to perform clock-off settings.

 - If a clock-off operation times out, it is assumed that the clock will
   eventually turn off. The 'ref_clk_enabled' flag is set directly.

Signed-off-by: Peter Wang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Chun-Hung Wu <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: ptr324

drivers/ufs/host/ufs-mediatek.c

@@ -351,7 +351,16 @@ static int ufs_mtk_setup_ref_clk(struct ufs_hba *hba, bool on)
 
 	dev_err(hba->dev, "missing ack of refclk req, reg: 0x%x\n", value);
 
-	ufs_mtk_ref_clk_notify(host->ref_clk_enabled, POST_CHANGE, res);
+	/*
+	 * If clock on timeout, assume clock is off, notify tfa do clock
+	 * off setting.(keep DIFN disable, release resource)
+	 * If clock off timeout, assume clock will off finally,
+	 * set ref_clk_enabled directly.(keep DIFN disable, keep resource)
+	 */
+	if (on)
+		ufs_mtk_ref_clk_notify(false, POST_CHANGE, res);
+	else
+		host->ref_clk_enabled = false;
 
 	return -ETIMEDOUT;