[v4, PATCH 0/3] fix some bugs in stmmac

[v4, PATCH 0/3] fix some bugs in stmmac

[Biao Huang]

changes in v4:                                                                  
        since MTL_OPERATION_MODE write back issue has be fixed in the latest driver,
remove original patch#3                                                         
                                                                                
changes in v3:                                                                  
        add a Fixes:tag for each patch                                          
                                                                                
changes in v2:                                                                  
        1. update rx_tail_addr as Jose's comment                                
        2. changes clk_csr condition as Alex's proposition                      
        3. remove init lines in dwmac-mediatek, get clk_csr from dts instead.   
                                                                                
v1:                                                                             
This series fix some bugs in stmmac driver                                      
3 patches are for common stmmac or dwmac4:                                      
        1. update rx tail pointer to fix rx dma hang issue.                     
        2. change condition for mdc clock to fix csr_clk can't be zero issue.   
        3. write the modified value back to MTL_OPERATION_MODE.                 
1 patch is for dwmac-mediatek:                                                  
        modify csr_clk value to fix mdio read/write fail issue for dwmac-mediatek
                                                                                
Biao Huang (3):                                                                 
  net: stmmac: update rx tail pointer register to fix rx dma hang               
    issue.                                                                      
  net: stmmac: fix csr_clk can't be zero issue                                  
  net: stmmac: dwmac-mediatek: modify csr_clk value to fix mdio                 
    read/write fail                                                             
                                                                                
 .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c   |    2 --                   
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    7 ++++---              
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-                
 3 files changed, 8 insertions(+), 6 deletions(-)                               
                                                                                
--                                                                              
1.7.9.5

[v4, PATCH 0/3] fix some bugs in stmmac

[Biao Huang]

changes in v4:                                                                  
        since MTL_OPERATION_MODE write back issue has be fixed in the latest driver,
remove original patch#3                                                         
                                                                                
changes in v3:                                                                  
        add a Fixes:tag for each patch                                          
                                                                                
changes in v2:                                                                  
        1. update rx_tail_addr as Jose's comment                                
        2. changes clk_csr condition as Alex's proposition                      
        3. remove init lines in dwmac-mediatek, get clk_csr from dts instead.   
                                                                                
v1:                                                                             
This series fix some bugs in stmmac driver                                      
3 patches are for common stmmac or dwmac4:                                      
        1. update rx tail pointer to fix rx dma hang issue.                     
        2. change condition for mdc clock to fix csr_clk can't be zero issue.   
        3. write the modified value back to MTL_OPERATION_MODE.                 
1 patch is for dwmac-mediatek:                                                  
        modify csr_clk value to fix mdio read/write fail issue for dwmac-mediatek
                                                                                
Biao Huang (3):                                                                 
  net: stmmac: update rx tail pointer register to fix rx dma hang               
    issue.                                                                      
  net: stmmac: fix csr_clk can't be zero issue                                  
  net: stmmac: dwmac-mediatek: modify csr_clk value to fix mdio                 
    read/write fail                                                             
                                                                                
 .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c   |    2 --                   
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    7 ++++---              
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-                
 3 files changed, 8 insertions(+), 6 deletions(-)                               
                                                                                
--                                                                              
1.7.9.5

[v4, PATCH 0/3] fix some bugs in stmmac

[Biao Huang]

changes in v4:                                                                  
        since MTL_OPERATION_MODE write back issue has be fixed in the latest driver,
remove original patch#3                                                         
                                                                                
changes in v3:                                                                  
        add a Fixes:tag for each patch                                          
                                                                                
changes in v2:                                                                  
        1. update rx_tail_addr as Jose's comment                                
        2. changes clk_csr condition as Alex's proposition                      
        3. remove init lines in dwmac-mediatek, get clk_csr from dts instead.   
                                                                                
v1:                                                                             
This series fix some bugs in stmmac driver                                      
3 patches are for common stmmac or dwmac4:                                      
        1. update rx tail pointer to fix rx dma hang issue.                     
        2. change condition for mdc clock to fix csr_clk can't be zero issue.   
        3. write the modified value back to MTL_OPERATION_MODE.                 
1 patch is for dwmac-mediatek:                                                  
        modify csr_clk value to fix mdio read/write fail issue for dwmac-mediatek
                                                                                
Biao Huang (3):                                                                 
  net: stmmac: update rx tail pointer register to fix rx dma hang               
    issue.                                                                      
  net: stmmac: fix csr_clk can't be zero issue                                  
  net: stmmac: dwmac-mediatek: modify csr_clk value to fix mdio                 
    read/write fail                                                             
                                                                                
 .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c   |    2 --                   
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    7 ++++---              
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-                
 3 files changed, 8 insertions(+), 6 deletions(-)                               
                                                                                
--                                                                              
1.7.9.5


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[v4, PATCH 1/3] net: stmmac: update rx tail pointer register to fix rx dma hang issue.

[Biao Huang]

Currently we will not update the receive descriptor tail pointer in
stmmac_rx_refill. Rx dma will think no available descriptors and stop
once received packets exceed DMA_RX_SIZE, so that the rx only test will fail.

Update the receive tail pointer in stmmac_rx_refill to add more descriptors
to the rx channel, so packets can be received continually

Fixes: 54139cf3bb33 ("net: stmmac: adding multiple buffers for rx")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 5678b86..06487a6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3338,6 +3338,7 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue)
 		entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE);
 	}
 	rx_q->dirty_rx = entry;
+	stmmac_set_rx_tail_ptr(priv, priv->ioaddr, rx_q->rx_tail_addr, queue);
 }
 
 /**
-- 
1.7.9.5

[v4, PATCH 1/3] net: stmmac: update rx tail pointer register to fix rx dma hang issue.

[Biao Huang]

Currently we will not update the receive descriptor tail pointer in
stmmac_rx_refill. Rx dma will think no available descriptors and stop
once received packets exceed DMA_RX_SIZE, so that the rx only test will fail.

Update the receive tail pointer in stmmac_rx_refill to add more descriptors
to the rx channel, so packets can be received continually

Fixes: 54139cf3bb33 ("net: stmmac: adding multiple buffers for rx")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 5678b86..06487a6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3338,6 +3338,7 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue)
 		entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE);
 	}
 	rx_q->dirty_rx = entry;
+	stmmac_set_rx_tail_ptr(priv, priv->ioaddr, rx_q->rx_tail_addr, queue);
 }
 
 /**
-- 
1.7.9.5

[v4, PATCH 1/3] net: stmmac: update rx tail pointer register to fix rx dma hang issue.

[Biao Huang]

Currently we will not update the receive descriptor tail pointer in
stmmac_rx_refill. Rx dma will think no available descriptors and stop
once received packets exceed DMA_RX_SIZE, so that the rx only test will fail.

Update the receive tail pointer in stmmac_rx_refill to add more descriptors
to the rx channel, so packets can be received continually

Fixes: 54139cf3bb33 ("net: stmmac: adding multiple buffers for rx")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 5678b86..06487a6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3338,6 +3338,7 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv, u32 queue)
 		entry = STMMAC_GET_ENTRY(entry, DMA_RX_SIZE);
 	}
 	rx_q->dirty_rx = entry;
+	stmmac_set_rx_tail_ptr(priv, priv->ioaddr, rx_q->rx_tail_addr, queue);
 }
 
 /**
-- 
1.7.9.5


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[v4, PATCH 2/3] net: stmmac: fix csr_clk can't be zero issue

[Biao Huang]

The specific clk_csr value can be zero, and
stmmac_clk is necessary for MDC clock which can be set dynamically.
So, change the condition from plat->clk_csr to plat->stmmac_clk to
fix clk_csr can't be zero issue.

Fixes: cd7201f477b9 ("stmmac: MDC clock dynamically based on the csr clock input")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    6 +++---
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 06487a6..b2feb6c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4380,10 +4380,10 @@ int stmmac_dvr_probe(struct device *device,
 	 * set the MDC clock dynamically according to the csr actual
 	 * clock input.
 	 */
-	if (!priv->plat->clk_csr)
-		stmmac_clk_csr_set(priv);
-	else
+	if (priv->plat->clk_csr >= 0)
 		priv->clk_csr = priv->plat->clk_csr;
+	else
+		stmmac_clk_csr_set(priv);
 
 	stmmac_check_pcs_mode(priv);
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 3031f2b..f45bfbe 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -408,7 +408,10 @@ struct plat_stmmacenet_data *
 	/* Default to phy auto-detection */
 	plat->phy_addr = -1;
 
-	/* Get clk_csr from device tree */
+	/* Default to get clk_csr from stmmac_clk_crs_set(),
+	 * or get clk_csr from device tree.
+	 */
+	plat->clk_csr = -1;
 	of_property_read_u32(np, "clk_csr", &plat->clk_csr);
 
 	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
-- 
1.7.9.5

[v4, PATCH 2/3] net: stmmac: fix csr_clk can't be zero issue

[Biao Huang]

The specific clk_csr value can be zero, and
stmmac_clk is necessary for MDC clock which can be set dynamically.
So, change the condition from plat->clk_csr to plat->stmmac_clk to
fix clk_csr can't be zero issue.

Fixes: cd7201f477b9 ("stmmac: MDC clock dynamically based on the csr clock input")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    6 +++---
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 06487a6..b2feb6c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4380,10 +4380,10 @@ int stmmac_dvr_probe(struct device *device,
 	 * set the MDC clock dynamically according to the csr actual
 	 * clock input.
 	 */
-	if (!priv->plat->clk_csr)
-		stmmac_clk_csr_set(priv);
-	else
+	if (priv->plat->clk_csr >= 0)
 		priv->clk_csr = priv->plat->clk_csr;
+	else
+		stmmac_clk_csr_set(priv);
 
 	stmmac_check_pcs_mode(priv);
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 3031f2b..f45bfbe 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -408,7 +408,10 @@ struct plat_stmmacenet_data *
 	/* Default to phy auto-detection */
 	plat->phy_addr = -1;
 
-	/* Get clk_csr from device tree */
+	/* Default to get clk_csr from stmmac_clk_crs_set(),
+	 * or get clk_csr from device tree.
+	 */
+	plat->clk_csr = -1;
 	of_property_read_u32(np, "clk_csr", &plat->clk_csr);
 
 	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
-- 
1.7.9.5

[v4, PATCH 2/3] net: stmmac: fix csr_clk can't be zero issue

[Biao Huang]

The specific clk_csr value can be zero, and
stmmac_clk is necessary for MDC clock which can be set dynamically.
So, change the condition from plat->clk_csr to plat->stmmac_clk to
fix clk_csr can't be zero issue.

Fixes: cd7201f477b9 ("stmmac: MDC clock dynamically based on the csr clock input")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    6 +++---
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 06487a6..b2feb6c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4380,10 +4380,10 @@ int stmmac_dvr_probe(struct device *device,
 	 * set the MDC clock dynamically according to the csr actual
 	 * clock input.
 	 */
-	if (!priv->plat->clk_csr)
-		stmmac_clk_csr_set(priv);
-	else
+	if (priv->plat->clk_csr >= 0)
 		priv->clk_csr = priv->plat->clk_csr;
+	else
+		stmmac_clk_csr_set(priv);
 
 	stmmac_check_pcs_mode(priv);
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 3031f2b..f45bfbe 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -408,7 +408,10 @@ struct plat_stmmacenet_data *
 	/* Default to phy auto-detection */
 	plat->phy_addr = -1;
 
-	/* Get clk_csr from device tree */
+	/* Default to get clk_csr from stmmac_clk_crs_set(),
+	 * or get clk_csr from device tree.
+	 */
+	plat->clk_csr = -1;
 	of_property_read_u32(np, "clk_csr", &plat->clk_csr);
 
 	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
-- 
1.7.9.5


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[v4, PATCH 3/3] net: stmmac: dwmac-mediatek: modify csr_clk value to fix mdio read/write fail

[Biao Huang]

1. the frequency of csr clock is 66.5MHz, so the csr_clk value should
be 0 other than 5.
2. the csr_clk can be got from device tree, so remove initialization here.

Fixes: 9992f37e346b ("stmmac: dwmac-mediatek: add support for mt2712")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c   |    2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
index bf25629..126b66b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
@@ -346,8 +346,6 @@ static int mediatek_dwmac_probe(struct platform_device *pdev)
 		return PTR_ERR(plat_dat);
 
 	plat_dat->interface = priv_plat->phy_mode;
-	/* clk_csr_i = 250-300MHz & MDC = clk_csr_i/124 */
-	plat_dat->clk_csr = 5;
 	plat_dat->has_gmac4 = 1;
 	plat_dat->has_gmac = 0;
 	plat_dat->pmt = 0;
-- 
1.7.9.5

[v4, PATCH 3/3] net: stmmac: dwmac-mediatek: modify csr_clk value to fix mdio read/write fail

[Biao Huang]

1. the frequency of csr clock is 66.5MHz, so the csr_clk value should
be 0 other than 5.
2. the csr_clk can be got from device tree, so remove initialization here.

Fixes: 9992f37e346b ("stmmac: dwmac-mediatek: add support for mt2712")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c   |    2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
index bf25629..126b66b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
@@ -346,8 +346,6 @@ static int mediatek_dwmac_probe(struct platform_device *pdev)
 		return PTR_ERR(plat_dat);
 
 	plat_dat->interface = priv_plat->phy_mode;
-	/* clk_csr_i = 250-300MHz & MDC = clk_csr_i/124 */
-	plat_dat->clk_csr = 5;
 	plat_dat->has_gmac4 = 1;
 	plat_dat->has_gmac = 0;
 	plat_dat->pmt = 0;
-- 
1.7.9.5

[v4, PATCH 3/3] net: stmmac: dwmac-mediatek: modify csr_clk value to fix mdio read/write fail

[Biao Huang]

1. the frequency of csr clock is 66.5MHz, so the csr_clk value should
be 0 other than 5.
2. the csr_clk can be got from device tree, so remove initialization here.

Fixes: 9992f37e346b ("stmmac: dwmac-mediatek: add support for mt2712")
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-mediatek.c   |    2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
index bf25629..126b66b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-mediatek.c
@@ -346,8 +346,6 @@ static int mediatek_dwmac_probe(struct platform_device *pdev)
 		return PTR_ERR(plat_dat);
 
 	plat_dat->interface = priv_plat->phy_mode;
-	/* clk_csr_i = 250-300MHz & MDC = clk_csr_i/124 */
-	plat_dat->clk_csr = 5;
 	plat_dat->has_gmac4 = 1;
 	plat_dat->has_gmac = 0;
 	plat_dat->pmt = 0;
-- 
1.7.9.5


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Re: [v4, PATCH 2/3] net: stmmac: fix csr_clk can't be zero issue

[Alexandre Torgue]

Hi Biao

On 5/24/19 8:26 AM, Biao Huang wrote:
> The specific clk_csr value can be zero, and
> stmmac_clk is necessary for MDC clock which can be set dynamically.
> So, change the condition from plat->clk_csr to plat->stmmac_clk to
> fix clk_csr can't be zero issue.
> 
> Fixes: cd7201f477b9 ("stmmac: MDC clock dynamically based on the csr clock input")
> Signed-off-by: Biao Huang <biao.huang@mediatek.com>
> ---
>   drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    6 +++---
>   .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-
>   2 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 06487a6..b2feb6c 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -4380,10 +4380,10 @@ int stmmac_dvr_probe(struct device *device,
>   	 * set the MDC clock dynamically according to the csr actual
>   	 * clock input.
>   	 */
> -	if (!priv->plat->clk_csr)
> -		stmmac_clk_csr_set(priv);
> -	else
> +	if (priv->plat->clk_csr >= 0)
>   		priv->clk_csr = priv->plat->clk_csr;
> +	else
> +		stmmac_clk_csr_set(priv);
>   
>   	stmmac_check_pcs_mode(priv);
>   
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index 3031f2b..f45bfbe 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -408,7 +408,10 @@ struct plat_stmmacenet_data *
>   	/* Default to phy auto-detection */
>   	plat->phy_addr = -1;
>   
> -	/* Get clk_csr from device tree */
> +	/* Default to get clk_csr from stmmac_clk_crs_set(),
> +	 * or get clk_csr from device tree.
> +	 */
> +	plat->clk_csr = -1;
>   	of_property_read_u32(np, "clk_csr", &plat->clk_csr);
>   
>   	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
> 

Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>

thanks
Alex

Re: [v4, PATCH 2/3] net: stmmac: fix csr_clk can't be zero issue

[Alexandre Torgue]

Hi Biao

On 5/24/19 8:26 AM, Biao Huang wrote:
> The specific clk_csr value can be zero, and
> stmmac_clk is necessary for MDC clock which can be set dynamically.
> So, change the condition from plat->clk_csr to plat->stmmac_clk to
> fix clk_csr can't be zero issue.
> 
> Fixes: cd7201f477b9 ("stmmac: MDC clock dynamically based on the csr clock input")
> Signed-off-by: Biao Huang <biao.huang@mediatek.com>
> ---
>   drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    6 +++---
>   .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-
>   2 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 06487a6..b2feb6c 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -4380,10 +4380,10 @@ int stmmac_dvr_probe(struct device *device,
>   	 * set the MDC clock dynamically according to the csr actual
>   	 * clock input.
>   	 */
> -	if (!priv->plat->clk_csr)
> -		stmmac_clk_csr_set(priv);
> -	else
> +	if (priv->plat->clk_csr >= 0)
>   		priv->clk_csr = priv->plat->clk_csr;
> +	else
> +		stmmac_clk_csr_set(priv);
>   
>   	stmmac_check_pcs_mode(priv);
>   
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index 3031f2b..f45bfbe 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -408,7 +408,10 @@ struct plat_stmmacenet_data *
>   	/* Default to phy auto-detection */
>   	plat->phy_addr = -1;
>   
> -	/* Get clk_csr from device tree */
> +	/* Default to get clk_csr from stmmac_clk_crs_set(),
> +	 * or get clk_csr from device tree.
> +	 */
> +	plat->clk_csr = -1;
>   	of_property_read_u32(np, "clk_csr", &plat->clk_csr);
>   
>   	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
> 

Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>

thanks
Alex

Re: [v4, PATCH 2/3] net: stmmac: fix csr_clk can't be zero issue

[Alexandre Torgue]

Hi Biao

On 5/24/19 8:26 AM, Biao Huang wrote:
> The specific clk_csr value can be zero, and
> stmmac_clk is necessary for MDC clock which can be set dynamically.
> So, change the condition from plat->clk_csr to plat->stmmac_clk to
> fix clk_csr can't be zero issue.
> 
> Fixes: cd7201f477b9 ("stmmac: MDC clock dynamically based on the csr clock input")
> Signed-off-by: Biao Huang <biao.huang@mediatek.com>
> ---
>   drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    6 +++---
>   .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |    5 ++++-
>   2 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 06487a6..b2feb6c 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -4380,10 +4380,10 @@ int stmmac_dvr_probe(struct device *device,
>   	 * set the MDC clock dynamically according to the csr actual
>   	 * clock input.
>   	 */
> -	if (!priv->plat->clk_csr)
> -		stmmac_clk_csr_set(priv);
> -	else
> +	if (priv->plat->clk_csr >= 0)
>   		priv->clk_csr = priv->plat->clk_csr;
> +	else
> +		stmmac_clk_csr_set(priv);
>   
>   	stmmac_check_pcs_mode(priv);
>   
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index 3031f2b..f45bfbe 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -408,7 +408,10 @@ struct plat_stmmacenet_data *
>   	/* Default to phy auto-detection */
>   	plat->phy_addr = -1;
>   
> -	/* Get clk_csr from device tree */
> +	/* Default to get clk_csr from stmmac_clk_crs_set(),
> +	 * or get clk_csr from device tree.
> +	 */
> +	plat->clk_csr = -1;
>   	of_property_read_u32(np, "clk_csr", &plat->clk_csr);
>   
>   	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
> 

Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>

thanks
Alex

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Re: [v4, PATCH 0/3] fix some bugs in stmmac

[David Miller]

From: Biao Huang <biao.huang@mediatek.com>
Date: Fri, 24 May 2019 14:26:06 +0800

> changes in v4:                                                                  
>         since MTL_OPERATION_MODE write back issue has be fixed in the latest driver,
> remove original patch#3                                                         
>                                                                                 
> changes in v3:                                                                  
>         add a Fixes:tag for each patch                                          
>                                                                                 
> changes in v2:                                                                  
>         1. update rx_tail_addr as Jose's comment                                
>         2. changes clk_csr condition as Alex's proposition                      
>         3. remove init lines in dwmac-mediatek, get clk_csr from dts instead.   
>                                                                                 
> v1:                                                                             
> This series fix some bugs in stmmac driver                                      
> 3 patches are for common stmmac or dwmac4:                                      
>         1. update rx tail pointer to fix rx dma hang issue.                     
>         2. change condition for mdc clock to fix csr_clk can't be zero issue.   
>         3. write the modified value back to MTL_OPERATION_MODE.                 
> 1 patch is for dwmac-mediatek:                                                  
>         modify csr_clk value to fix mdio read/write fail issue for dwmac-mediatek

Series applied, thanks.

Re: [v4, PATCH 0/3] fix some bugs in stmmac

[David Miller]

From: Biao Huang <biao.huang@mediatek.com>
Date: Fri, 24 May 2019 14:26:06 +0800

> changes in v4:                                                                  
>         since MTL_OPERATION_MODE write back issue has be fixed in the latest driver,
> remove original patch#3                                                         
>                                                                                 
> changes in v3:                                                                  
>         add a Fixes:tag for each patch                                          
>                                                                                 
> changes in v2:                                                                  
>         1. update rx_tail_addr as Jose's comment                                
>         2. changes clk_csr condition as Alex's proposition                      
>         3. remove init lines in dwmac-mediatek, get clk_csr from dts instead.   
>                                                                                 
> v1:                                                                             
> This series fix some bugs in stmmac driver                                      
> 3 patches are for common stmmac or dwmac4:                                      
>         1. update rx tail pointer to fix rx dma hang issue.                     
>         2. change condition for mdc clock to fix csr_clk can't be zero issue.   
>         3. write the modified value back to MTL_OPERATION_MODE.                 
> 1 patch is for dwmac-mediatek:                                                  
>         modify csr_clk value to fix mdio read/write fail issue for dwmac-mediatek

Series applied, thanks.

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