[PATCH v2 3/3] mmc: rockchip_sdhci: Fix HS400 mode write on RK3568

[Jonas Karlman]

Testing has shown that writing to eMMC using HS400 modes on RK3568
result in an ERROR.

Change the tap number for transmit clock to fix this.

Also stop DLL when config_dll() is called to disable DLL.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
Changes in v2:
- New patch to fix HS400 mode write on RK3568
---
 drivers/mmc/rockchip_sdhci.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
index 285332d9f4fd..706fb1235796 100644
--- a/drivers/mmc/rockchip_sdhci.c
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -71,7 +71,6 @@
 #define DLL_RXCLK_NO_INVERTER		BIT(29)
 #define DLL_RXCLK_ORI_GATE		BIT(31)
 #define DLL_TXCLK_TAPNUM_DEFAULT	0x10
-#define DLL_TXCLK_TAPNUM_90_DEGREES	0x9
 #define DLL_TXCLK_TAPNUM_FROM_SW	BIT(24)
 #define DLL_TXCLK_NO_INVERTER		BIT(29)
 #define DLL_STRBIN_TAPNUM_DEFAULT	0x4
@@ -314,8 +313,10 @@ static int rk3568_sdhci_config_dll(struct sdhci_host *host, u32 clock, bool enab
 	int val, ret;
 	u32 extra, txclk_tapnum;
 
-	if (!enable)
+	if (!enable) {
+		sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL);
 		return 0;
+	}
 
 	if (clock >= 100 * MHz) {
 		/* reset DLL */
@@ -648,7 +649,7 @@ static const struct sdhci_data rk3568_data = {
 	.config_dll = rk3568_sdhci_config_dll,
 	.flags = FLAG_INVERTER_FLAG_IN_RXCLK,
 	.hs200_txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT,
-	.hs400_txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT,
+	.hs400_txclk_tapnum = 0x8,
 };
 
 static const struct sdhci_data rk3588_data = {
@@ -656,7 +657,7 @@ static const struct sdhci_data rk3588_data = {
 	.set_clock = rk3568_sdhci_set_clock,
 	.config_dll = rk3568_sdhci_config_dll,
 	.hs200_txclk_tapnum = DLL_TXCLK_TAPNUM_DEFAULT,
-	.hs400_txclk_tapnum = DLL_TXCLK_TAPNUM_90_DEGREES,
+	.hs400_txclk_tapnum = 0x9,
 };
 
 static const struct udevice_id sdhci_ids[] = {
-- 
2.43.0