Hi Sasha,
On Mon, Jan 28, 2019 at 10:58:03AM -0500, Sasha Levin wrote:
From: Bin Liu b-liu@ti.com
[ Upstream commit 54578ee883e34d2d1c518d48f1c1e2dd3f387188 ]
Since the runtime PM support was added in musb, dsps relies on the timer calling otg_timer() to activate the usb subsystem. However the driver doesn't enable the timer for peripheral port, then the peripheral port is unable to be enumerated by a host if the other usb port is disabled or in peripheral mode too.
So let's start the timer for peripheral port too.
Fixes: ea2f35c01d5e ("usb: musb: Fix sleeping function called from invalid context for hdrc glue") Acked-by: Tony Lindgren tony@atomide.com Signed-off-by: Bin Liu b-liu@ti.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org
drivers/usb/musb/musb_dsps.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index 1e6d78b1334e..403eb97915f8 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -181,9 +181,11 @@ static void dsps_musb_enable(struct musb *musb) musb_writel(reg_base, wrp->epintr_set, epmask); musb_writel(reg_base, wrp->coreintr_set, coremask);
- /* start polling for ID change in dual-role idle mode */
- if (musb->xceiv->otg->state == OTG_STATE_B_IDLE &&
musb->port_mode == MUSB_OTG)
- /*
* start polling for runtime PM active and idle,
* and for ID change in dual-role idle mode.
*/
- if (musb->xceiv->otg->state == OTG_STATE_B_IDLE) dsps_mod_timer(glue, -1);
} @@ -254,6 +256,10 @@ static int dsps_check_status(struct musb *musb, void *unused) musb->xceiv->otg->state = OTG_STATE_A_IDLE; MUSB_HST_MODE(musb); }
if (musb->port_mode == MUSB_PERIPHERAL)
skip_session = 1;
if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session) musb_writeb(mregs, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
This backport won't apply to stables cleanly. I have sent the manual backport [1] for v4.9+ a few weeks ago.
[1] https://marc.info/?l=linux-usb&m=154696698103763&w=2
Regards, -Bin.