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[1/2] usb: chipidea: msm: Use posted data writes on AHB

Message ID 1446789847-640-2-git-send-email-agross@codeaurora.org (mailing list archive)
State Accepted, archived
Delegated to: Andy Gross
Headers show

Commit Message

Andy Gross Nov. 6, 2015, 6:04 a.m. UTC 
This patch sets the AHBMODE to allow for posted data writes.  This
results in higher performance.

Signed-off-by: Andy Gross <agross@codeaurora.org>
---
 drivers/usb/chipidea/ci_hdrc_msm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Peter Chen Nov. 6, 2015, 8:24 a.m. UTC | #1 
On Fri, Nov 06, 2015 at 12:04:06AM -0600, Andy Gross wrote:
> This patch sets the AHBMODE to allow for posted data writes.  This
> results in higher performance.
> 
> Signed-off-by: Andy Gross <agross@codeaurora.org>
> ---
>  drivers/usb/chipidea/ci_hdrc_msm.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
> index d79ecc0..3889809 100644
> --- a/drivers/usb/chipidea/ci_hdrc_msm.c
> +++ b/drivers/usb/chipidea/ci_hdrc_msm.c
> @@ -25,7 +25,8 @@ static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
>  	case CI_HDRC_CONTROLLER_RESET_EVENT:
>  		dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
>  		writel(0, USB_AHBBURST);
> -		writel(0, USB_AHBMODE);
> +		/* use AHB transactor, allow posted data writes */
> +		writel(0x8, USB_AHBMODE);
>  		usb_phy_init(ci->usb_phy);
>  		break;
>  	case CI_HDRC_CONTROLLER_STOPPED_EVENT:
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> hosted by The Linux Foundation
> 

Greg, another related changes is at host driver, pick it up
directly please, thanks.

Acked-by: Peter Chen <peter.chen@freescale.com>
diff mbox

Patch

diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
index d79ecc0..3889809 100644
--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -25,7 +25,8 @@  static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
 	case CI_HDRC_CONTROLLER_RESET_EVENT:
 		dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
 		writel(0, USB_AHBBURST);
-		writel(0, USB_AHBMODE);
+		/* use AHB transactor, allow posted data writes */
+		writel(0x8, USB_AHBMODE);
 		usb_phy_init(ci->usb_phy);
 		break;
 	case CI_HDRC_CONTROLLER_STOPPED_EVENT: