diff mbox series

[v3,01/18] ram: rk3399: Handle data training return types

Message ID 20190715182856.21688-2-jagan@amarulasolutions.com (mailing list archive)
State New, archived
Headers show
Series ram: rk3399: Add rank detection | expand

Commit Message

Jagan Teki July 15, 2019, 6:28 p.m. UTC 
data trainings calls like ca, wl, rg, rl, wdql have proper
return types with -EIO and the return type missed to handle
in data_training function.

This patch, add proper return type checks along with useful
debug statement on each data training calls.

Incidentally this would help to prevent the sdram initialization
hang for single channel dram and when the code is trying to
initialize second channel with proper return type of relevant
data training call might failed.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
 drivers/ram/rockchip/sdram_rk3399.c | 50 ++++++++++++++++++++++-------
 1 file changed, 38 insertions(+), 12 deletions(-)

Comments

Kever Yang July 16, 2019, 7:36 a.m. UTC | #1 
On 2019/7/16 上午2:28, Jagan Teki wrote:
> data trainings calls like ca, wl, rg, rl, wdql have proper
> return types with -EIO and the return type missed to handle
> in data_training function.
>
> This patch, add proper return type checks along with useful
> debug statement on each data training calls.
>
> Incidentally this would help to prevent the sdram initialization
> hang for single channel dram and when the code is trying to
> initialize second channel with proper return type of relevant
> data training call might failed.
>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>

Thanks,
  - Kever
> ---
>   drivers/ram/rockchip/sdram_rk3399.c | 50 ++++++++++++++++++++++-------
>   1 file changed, 38 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
> index 492b0975dd..e9c0fdf2d4 100644
> --- a/drivers/ram/rockchip/sdram_rk3399.c
> +++ b/drivers/ram/rockchip/sdram_rk3399.c
> @@ -887,6 +887,7 @@ static int data_training(const struct chan_info *chan, u32 channel,
>   			 u32 training_flag)
>   {
>   	u32 *denali_phy = chan->publ->denali_phy;
> +	int ret;
>   
>   	/* PHY_927 PHY_PAD_DQS_DRIVE  RPULL offset_22 */
>   	setbits_le32(&denali_phy[927], (1 << 22));
> @@ -907,24 +908,49 @@ static int data_training(const struct chan_info *chan, u32 channel,
>   	}
>   
>   	/* ca training(LPDDR4,LPDDR3 support) */
> -	if ((training_flag & PI_CA_TRAINING) == PI_CA_TRAINING)
> -		data_training_ca(chan, channel, params);
> +	if ((training_flag & PI_CA_TRAINING) == PI_CA_TRAINING) {
> +		ret = data_training_ca(chan, channel, params);
> +		if (ret < 0) {
> +			debug("%s: data training ca failed\n", __func__);
> +			return ret;
> +		}
> +	}
>   
>   	/* write leveling(LPDDR4,LPDDR3,DDR3 support) */
> -	if ((training_flag & PI_WRITE_LEVELING) == PI_WRITE_LEVELING)
> -		data_training_wl(chan, channel, params);
> +	if ((training_flag & PI_WRITE_LEVELING) == PI_WRITE_LEVELING) {
> +		ret = data_training_wl(chan, channel, params);
> +		if (ret < 0) {
> +			debug("%s: data training wl failed\n", __func__);
> +			return ret;
> +		}
> +	}
>   
>   	/* read gate training(LPDDR4,LPDDR3,DDR3 support) */
> -	if ((training_flag & PI_READ_GATE_TRAINING) == PI_READ_GATE_TRAINING)
> -		data_training_rg(chan, channel, params);
> +	if ((training_flag & PI_READ_GATE_TRAINING) == PI_READ_GATE_TRAINING) {
> +		ret = data_training_rg(chan, channel, params);
> +		if (ret < 0) {
> +			debug("%s: data training rg failed\n", __func__);
> +			return ret;
> +		}
> +	}
>   
>   	/* read leveling(LPDDR4,LPDDR3,DDR3 support) */
> -	if ((training_flag & PI_READ_LEVELING) == PI_READ_LEVELING)
> -		data_training_rl(chan, channel, params);
> +	if ((training_flag & PI_READ_LEVELING) == PI_READ_LEVELING) {
> +		ret = data_training_rl(chan, channel, params);
> +		if (ret < 0) {
> +			debug("%s: data training rl failed\n", __func__);
> +			return ret;
> +		}
> +	}
>   
>   	/* wdq leveling(LPDDR4 support) */
> -	if ((training_flag & PI_WDQ_LEVELING) == PI_WDQ_LEVELING)
> -		data_training_wdql(chan, channel, params);
> +	if ((training_flag & PI_WDQ_LEVELING) == PI_WDQ_LEVELING) {
> +		ret = data_training_wdql(chan, channel, params);
> +		if (ret < 0) {
> +			debug("%s: data training wdql failed\n", __func__);
> +			return ret;
> +		}
> +	}
>   
>   	/* PHY_927 PHY_PAD_DQS_DRIVE  RPULL offset_22 */
>   	clrbits_le32(&denali_phy[927], (1 << 22));
> @@ -1062,7 +1088,7 @@ static int switch_to_phy_index1(struct dram_info *dram,
>   		clrsetbits_le32(&denali_phy[896], (0x3 << 8) | 1, 1 << 8);
>   		ret = data_training(&dram->chan[channel], channel,
>   				    params, PI_FULL_TRAINING);
> -		if (ret) {
> +		if (ret < 0) {
>   			debug("index1 training failed\n");
>   			return ret;
>   		}
> @@ -1108,7 +1134,7 @@ static int sdram_init(struct dram_info *dram,
>   			udelay(10);
>   
>   		if (data_training(chan, channel, params, PI_FULL_TRAINING)) {
> -			printf("SDRAM initialization failed, reset\n");
> +			printf("%s: data training failed\n", __func__);
>   			return -EIO;
>   		}
>
diff mbox series

Patch

diff --git a/drivers/ram/rockchip/sdram_rk3399.c b/drivers/ram/rockchip/sdram_rk3399.c
index 492b0975dd..e9c0fdf2d4 100644
--- a/drivers/ram/rockchip/sdram_rk3399.c
+++ b/drivers/ram/rockchip/sdram_rk3399.c
@@ -887,6 +887,7 @@  static int data_training(const struct chan_info *chan, u32 channel,
 			 u32 training_flag)
 {
 	u32 *denali_phy = chan->publ->denali_phy;
+	int ret;
 
 	/* PHY_927 PHY_PAD_DQS_DRIVE  RPULL offset_22 */
 	setbits_le32(&denali_phy[927], (1 << 22));
@@ -907,24 +908,49 @@  static int data_training(const struct chan_info *chan, u32 channel,
 	}
 
 	/* ca training(LPDDR4,LPDDR3 support) */
-	if ((training_flag & PI_CA_TRAINING) == PI_CA_TRAINING)
-		data_training_ca(chan, channel, params);
+	if ((training_flag & PI_CA_TRAINING) == PI_CA_TRAINING) {
+		ret = data_training_ca(chan, channel, params);
+		if (ret < 0) {
+			debug("%s: data training ca failed\n", __func__);
+			return ret;
+		}
+	}
 
 	/* write leveling(LPDDR4,LPDDR3,DDR3 support) */
-	if ((training_flag & PI_WRITE_LEVELING) == PI_WRITE_LEVELING)
-		data_training_wl(chan, channel, params);
+	if ((training_flag & PI_WRITE_LEVELING) == PI_WRITE_LEVELING) {
+		ret = data_training_wl(chan, channel, params);
+		if (ret < 0) {
+			debug("%s: data training wl failed\n", __func__);
+			return ret;
+		}
+	}
 
 	/* read gate training(LPDDR4,LPDDR3,DDR3 support) */
-	if ((training_flag & PI_READ_GATE_TRAINING) == PI_READ_GATE_TRAINING)
-		data_training_rg(chan, channel, params);
+	if ((training_flag & PI_READ_GATE_TRAINING) == PI_READ_GATE_TRAINING) {
+		ret = data_training_rg(chan, channel, params);
+		if (ret < 0) {
+			debug("%s: data training rg failed\n", __func__);
+			return ret;
+		}
+	}
 
 	/* read leveling(LPDDR4,LPDDR3,DDR3 support) */
-	if ((training_flag & PI_READ_LEVELING) == PI_READ_LEVELING)
-		data_training_rl(chan, channel, params);
+	if ((training_flag & PI_READ_LEVELING) == PI_READ_LEVELING) {
+		ret = data_training_rl(chan, channel, params);
+		if (ret < 0) {
+			debug("%s: data training rl failed\n", __func__);
+			return ret;
+		}
+	}
 
 	/* wdq leveling(LPDDR4 support) */
-	if ((training_flag & PI_WDQ_LEVELING) == PI_WDQ_LEVELING)
-		data_training_wdql(chan, channel, params);
+	if ((training_flag & PI_WDQ_LEVELING) == PI_WDQ_LEVELING) {
+		ret = data_training_wdql(chan, channel, params);
+		if (ret < 0) {
+			debug("%s: data training wdql failed\n", __func__);
+			return ret;
+		}
+	}
 
 	/* PHY_927 PHY_PAD_DQS_DRIVE  RPULL offset_22 */
 	clrbits_le32(&denali_phy[927], (1 << 22));
@@ -1062,7 +1088,7 @@  static int switch_to_phy_index1(struct dram_info *dram,
 		clrsetbits_le32(&denali_phy[896], (0x3 << 8) | 1, 1 << 8);
 		ret = data_training(&dram->chan[channel], channel,
 				    params, PI_FULL_TRAINING);
-		if (ret) {
+		if (ret < 0) {
 			debug("index1 training failed\n");
 			return ret;
 		}
@@ -1108,7 +1134,7 @@  static int sdram_init(struct dram_info *dram,
 			udelay(10);
 
 		if (data_training(chan, channel, params, PI_FULL_TRAINING)) {
-			printf("SDRAM initialization failed, reset\n");
+			printf("%s: data training failed\n", __func__);
 			return -EIO;
 		}