diff mbox series

[V2] scsi: ufs: qcom: update MODE_MAX cfg_bw value

Message ID 20240828132526.25719-1-quic_mapa@quicinc.com
State Superseded
Headers show
Series [V2] scsi: ufs: qcom: update MODE_MAX cfg_bw value | expand

Commit Message

Manish Pandey Aug. 28, 2024, 1:25 p.m. UTC
The cfg_bw value for max mode was incorrect for the Qualcomm SoC.
Update it to the correct value for cfg_bw max mode.

Signed-off-by: Manish Pandey <quic_mapa@quicinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Manivannan Sadhasivam Sept. 2, 2024, 5:20 a.m. UTC | #1
On Thu, Aug 29, 2024 at 05:44:21PM +0530, MANISH PANDEY wrote:
> 
> On 8/28/2024 7:01 PM, Manivannan Sadhasivam wrote:
> > On Wed, Aug 28, 2024 at 06:55:26PM +0530, Manish Pandey wrote:
> > > The cfg_bw value for max mode was incorrect for the Qualcomm SoC.
> > 
> > What do you mean by 'incorrect'? I extracted the value from downstream DTs. So
> > it cannot be incorrect.
> > 
> > If you want to update it, please clearly provide the reason.
> 
> Hi Mani,
> 
> From the snip from commit message
> "The bandwidth values defined in ufs_qcom_bw_table struct are taken from
> Qcom downstream vendor devicetree source and are calculated as per the
> UFS3.1 Spec."
> 
> we have UFS 4.x devices, and ufs_qcom_bw_table is already updated with Gear
> 5 support (8db8f6ce556a - "scsi: ufs: qcom: Add missing interconnect
> bandwidth values for Gear 5"). So the max cfg_bw is not updated.
> 
> Also for UFS 3.x devices,
> [MODE_HS_RB][UFS_HS_G3][UFS_LANE_2] = { 1492582,        204800 },
> [MODE_HS_RB][UFS_HS_G4][UFS_LANE_2] = { 2915200,        409600 },
> [MODE_MAX][0][0]                    = { 7643136,        307200 },
> 
> Please have a look for current max mode value(307200), it is even less than
> UFS_HS_G4 (409600). So it should be updated.
> 

Okay, then you should mention that the max value is updated for UFS 4.x devices
and mention that commit 8db8f6ce556a missed adding them. Also add the fixes tag
for 8db8f6ce556a.

- Mani
diff mbox series

Patch

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index c87fdc849c62..ecdfff2456e3 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -93,7 +93,7 @@  static const struct __ufs_qcom_bw_table {
 	[MODE_HS_RB][UFS_HS_G3][UFS_LANE_2] = { 1492582,	204800 },
 	[MODE_HS_RB][UFS_HS_G4][UFS_LANE_2] = { 2915200,	409600 },
 	[MODE_HS_RB][UFS_HS_G5][UFS_LANE_2] = { 5836800,	819200 },
-	[MODE_MAX][0][0]		    = { 7643136,	307200 },
+	[MODE_MAX][0][0]		    = { 7643136,	819200 },
 };
 
 static void ufs_qcom_get_default_testbus_cfg(struct ufs_qcom_host *host);