diff mbox series

[v6,06/10] scsi: ufs: ufs-qcom: Set initial PHY gear to max HS gear for HW ver 4 and newer

Message ID 1701246516-11626-7-git-send-email-quic_cang@quicinc.com
State New
Headers
Series Enable HS-G5 support on SM8550 |

Commit Message

Can Guo Nov. 29, 2023, 8:28 a.m. UTC 
  Since HW ver 4, max HS gear can be get from UFS host controller's register,
use the max HS gear as the initial PHY gear instead of UFS_HS_G2, so that
we don't need to update the hard code for newer targets in future.

Signed-off-by: Can Guo <quic_cang@quicinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

Comments

Nitin Rawat Nov. 30, 2023, 5:52 a.m. UTC | #1 
On 11/29/2023 1:58 PM, Can Guo wrote:
> Since HW ver 4, max HS gear can be get from UFS host controller's register,
> use the max HS gear as the initial PHY gear instead of UFS_HS_G2, so that
> we don't need to update the hard code for newer targets in future.
> 
> Signed-off-by: Can Guo <quic_cang@quicinc.com>
> ---
>   drivers/ufs/host/ufs-qcom.c | 21 +++++++++++++++------
>   1 file changed, 15 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index aca6199..30f4ca6 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -1060,6 +1060,20 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
>   		hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
>   }
>   
> +static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host)
> +{
> +	struct ufs_host_params *host_params = &host->host_params;
> +
> +	host->phy_gear = host_params->hs_tx_gear;
> +
> +	/*
> +	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
> +	 * Switching to max gear will be performed during reinit if supported.
> +	 */
> +	if (host->hw_ver.major < 0x4)
> +		host->phy_gear = UFS_HS_G2;
> +}
> +
>   static void ufs_qcom_set_host_params(struct ufs_hba *hba)
>   {
>   	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
> @@ -1296,6 +1310,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>   	ufs_qcom_set_caps(hba);
>   	ufs_qcom_advertise_quirks(hba);
>   	ufs_qcom_set_host_params(hba);
> +	ufs_qcom_set_phy_gear(host);
>   
>   	err = ufs_qcom_ice_init(host);
>   	if (err)
> @@ -1313,12 +1328,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>   		dev_warn(dev, "%s: failed to configure the testbus %d\n",
>   				__func__, err);
>   
> -	/*
> -	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
> -	 * Switching to max gear will be performed during reinit if supported.
> -	 */
> -	host->phy_gear = UFS_HS_G2;
> -
>   	return 0;
>   
>   out_variant_clear:

Reviewed-by: Nitin Rawat <quic_nitirawa@quicinc.com>
Manivannan Sadhasivam Nov. 30, 2023, 6:47 a.m. UTC | #2 
On Wed, Nov 29, 2023 at 12:28:31AM -0800, Can Guo wrote:
> Since HW ver 4, max HS gear can be get from UFS host controller's register,
> use the max HS gear as the initial PHY gear instead of UFS_HS_G2, so that
> we don't need to update the hard code for newer targets in future.
> 
> Signed-off-by: Can Guo <quic_cang@quicinc.com>

One comment below. With that addressed,

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

> ---
>  drivers/ufs/host/ufs-qcom.c | 21 +++++++++++++++------
>  1 file changed, 15 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
> index aca6199..30f4ca6 100644
> --- a/drivers/ufs/host/ufs-qcom.c
> +++ b/drivers/ufs/host/ufs-qcom.c
> @@ -1060,6 +1060,20 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
>  		hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
>  }
>  
> +static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host)
> +{
> +	struct ufs_host_params *host_params = &host->host_params;
> +
> +	host->phy_gear = host_params->hs_tx_gear;
> +
> +	/*
> +	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
> +	 * Switching to max gear will be performed during reinit if supported.

As I mentioned in v5, you need to reword this comment to make it clear we are
setting G2 only for platforms < v4. Something like below:

"For controllers whose major version is < 4, power up the PHY using minimum
supported gear (UFS_HS_G2). Switching to max gear will be performed during
reinit if supported. For newer controllers (>= 4), PHY will be powered up using
max supported gear."

- Mani

> +	 */
> +	if (host->hw_ver.major < 0x4)
> +		host->phy_gear = UFS_HS_G2;
> +}
> +
>  static void ufs_qcom_set_host_params(struct ufs_hba *hba)
>  {
>  	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
> @@ -1296,6 +1310,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>  	ufs_qcom_set_caps(hba);
>  	ufs_qcom_advertise_quirks(hba);
>  	ufs_qcom_set_host_params(hba);
> +	ufs_qcom_set_phy_gear(host);
>  
>  	err = ufs_qcom_ice_init(host);
>  	if (err)
> @@ -1313,12 +1328,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>  		dev_warn(dev, "%s: failed to configure the testbus %d\n",
>  				__func__, err);
>  
> -	/*
> -	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
> -	 * Switching to max gear will be performed during reinit if supported.
> -	 */
> -	host->phy_gear = UFS_HS_G2;
> -
>  	return 0;
>  
>  out_variant_clear:
> -- 
> 2.7.4
> 
>
Can Guo Nov. 30, 2023, 7:49 a.m. UTC | #3 
On 11/30/2023 2:47 PM, Manivannan Sadhasivam wrote:
> On Wed, Nov 29, 2023 at 12:28:31AM -0800, Can Guo wrote:
>> Since HW ver 4, max HS gear can be get from UFS host controller's register,
>> use the max HS gear as the initial PHY gear instead of UFS_HS_G2, so that
>> we don't need to update the hard code for newer targets in future.
>>
>> Signed-off-by: Can Guo <quic_cang@quicinc.com>
> 
> One comment below. With that addressed,
> 
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> 
>> ---
>>   drivers/ufs/host/ufs-qcom.c | 21 +++++++++++++++------
>>   1 file changed, 15 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
>> index aca6199..30f4ca6 100644
>> --- a/drivers/ufs/host/ufs-qcom.c
>> +++ b/drivers/ufs/host/ufs-qcom.c
>> @@ -1060,6 +1060,20 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
>>   		hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
>>   }
>>   
>> +static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host)
>> +{
>> +	struct ufs_host_params *host_params = &host->host_params;
>> +
>> +	host->phy_gear = host_params->hs_tx_gear;
>> +
>> +	/*
>> +	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
>> +	 * Switching to max gear will be performed during reinit if supported.
> 
> As I mentioned in v5, you need to reword this comment to make it clear we are
> setting G2 only for platforms < v4. Something like below:
> 
> "For controllers whose major version is < 4, power up the PHY using minimum
> supported gear (UFS_HS_G2). Switching to max gear will be performed during
> reinit if supported. For newer controllers (>= 4), PHY will be powered up using
> max supported gear."

Sorry that I missed this one, will add in next version.

Thanks,
Can Guo.

> 
> - Mani
> 
>> +	 */
>> +	if (host->hw_ver.major < 0x4)
>> +		host->phy_gear = UFS_HS_G2;
>> +}
>> +
>>   static void ufs_qcom_set_host_params(struct ufs_hba *hba)
>>   {
>>   	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
>> @@ -1296,6 +1310,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>>   	ufs_qcom_set_caps(hba);
>>   	ufs_qcom_advertise_quirks(hba);
>>   	ufs_qcom_set_host_params(hba);
>> +	ufs_qcom_set_phy_gear(host);
>>   
>>   	err = ufs_qcom_ice_init(host);
>>   	if (err)
>> @@ -1313,12 +1328,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
>>   		dev_warn(dev, "%s: failed to configure the testbus %d\n",
>>   				__func__, err);
>>   
>> -	/*
>> -	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
>> -	 * Switching to max gear will be performed during reinit if supported.
>> -	 */
>> -	host->phy_gear = UFS_HS_G2;
>> -
>>   	return 0;
>>   
>>   out_variant_clear:
>> -- 
>> 2.7.4
>>
>>
>
diff mbox series

Patch

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index aca6199..30f4ca6 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1060,6 +1060,20 @@  static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
 		hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
 }
 
+static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host)
+{
+	struct ufs_host_params *host_params = &host->host_params;
+
+	host->phy_gear = host_params->hs_tx_gear;
+
+	/*
+	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
+	 * Switching to max gear will be performed during reinit if supported.
+	 */
+	if (host->hw_ver.major < 0x4)
+		host->phy_gear = UFS_HS_G2;
+}
+
 static void ufs_qcom_set_host_params(struct ufs_hba *hba)
 {
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
@@ -1296,6 +1310,7 @@  static int ufs_qcom_init(struct ufs_hba *hba)
 	ufs_qcom_set_caps(hba);
 	ufs_qcom_advertise_quirks(hba);
 	ufs_qcom_set_host_params(hba);
+	ufs_qcom_set_phy_gear(host);
 
 	err = ufs_qcom_ice_init(host);
 	if (err)
@@ -1313,12 +1328,6 @@  static int ufs_qcom_init(struct ufs_hba *hba)
 		dev_warn(dev, "%s: failed to configure the testbus %d\n",
 				__func__, err);
 
-	/*
-	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
-	 * Switching to max gear will be performed during reinit if supported.
-	 */
-	host->phy_gear = UFS_HS_G2;
-
 	return 0;
 
 out_variant_clear: