2023-01-13 20:53:00

by Stephen Boyd

Subject: [PATCH 5.15.y v2 5/5] phy: qcom-qmp-combo: fix runtime suspend

From: Johan Hovold <[email protected]>

commit c7b98de745cffdceefc077ad5cf9cda032ef8959 upstream.

Drop the confused runtime-suspend type check which effectively broke
runtime PM if the DP child node happens to be parsed before the USB
child node during probe (e.g. due to order of child nodes in the
devicetree).

Instead use the new driver data USB PHY pointer to access the USB
configuration and resources.

Fixes: 52e013d0bffa ("phy: qcom-qmp: Add support for DP in USB3+DP combo phy")
Reviewed-by: Dmitry Baryshkov <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
[[email protected]: Backport to pre-split driver]
Signed-off-by: Stephen Boyd <[email protected]>
---
drivers/phy/qualcomm/phy-qcom-qmp.c | 12 ++----------
1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index b8646eaf1767..64a42e28e99f 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -4985,15 +4985,11 @@ static void qcom_qmp_phy_disable_autonomous_mode(struct qmp_phy *qphy)
static int __maybe_unused qcom_qmp_phy_runtime_suspend(struct device *dev)
{
struct qcom_qmp *qmp = dev_get_drvdata(dev);
- struct qmp_phy *qphy = qmp->phys[0];
+ struct qmp_phy *qphy = qmp->usb_phy;
const struct qmp_phy_cfg *cfg = qphy->cfg;

dev_vdbg(dev, "Suspending QMP phy, mode:%d\n", qphy->mode);

- /* Supported only for USB3 PHY and luckily USB3 is the first phy */
- if (cfg->type != PHY_TYPE_USB3)
- return 0;
-
if (!qmp->init_count) {
dev_vdbg(dev, "PHY not initialized, bailing out\n");
return 0;
@@ -5010,16 +5006,12 @@ static int __maybe_unused qcom_qmp_phy_runtime_suspend(struct device *dev)
static int __maybe_unused qcom_qmp_phy_runtime_resume(struct device *dev)
{
struct qcom_qmp *qmp = dev_get_drvdata(dev);
- struct qmp_phy *qphy = qmp->phys[0];
+ struct qmp_phy *qphy = qmp->usb_phy;
const struct qmp_phy_cfg *cfg = qphy->cfg;
int ret = 0;

dev_vdbg(dev, "Resuming QMP phy, mode:%d\n", qphy->mode);

- /* Supported only for USB3 PHY and luckily USB3 is the first phy */
- if (cfg->type != PHY_TYPE_USB3)
- return 0;
-
if (!qmp->init_count) {
dev_vdbg(dev, "PHY not initialized, bailing out\n");
return 0;
--
https://chromeos.dev

2023-01-23 10:48:14

by Johan Hovold

Subject: Re: [PATCH 5.15.y v2 5/5] phy: qcom-qmp-combo: fix runtime suspend

On Fri, Jan 13, 2023 at 12:45:48PM -0800, Stephen Boyd wrote:
> From: Johan Hovold <[email protected]>
>
> commit c7b98de745cffdceefc077ad5cf9cda032ef8959 upstream.
>
> Drop the confused runtime-suspend type check which effectively broke
> runtime PM if the DP child node happens to be parsed before the USB
> child node during probe (e.g. due to order of child nodes in the
> devicetree).
>
> Instead use the new driver data USB PHY pointer to access the USB
> configuration and resources.
>
> Fixes: 52e013d0bffa ("phy: qcom-qmp: Add support for DP in USB3+DP combo phy")
> Reviewed-by: Dmitry Baryshkov <[email protected]>
> Signed-off-by: Johan Hovold <[email protected]>
> Link: https://lore.kernel.org/r/[email protected]
> Signed-off-by: Vinod Koul <[email protected]>
> [[email protected]: Backport to pre-split driver]
> Signed-off-by: Stephen Boyd <[email protected]>
> ---
> drivers/phy/qualcomm/phy-qcom-qmp.c | 12 ++----------
> 1 file changed, 2 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> index b8646eaf1767..64a42e28e99f 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> @@ -4985,15 +4985,11 @@ static void qcom_qmp_phy_disable_autonomous_mode(struct qmp_phy *qphy)
> static int __maybe_unused qcom_qmp_phy_runtime_suspend(struct device *dev)
> {
> struct qcom_qmp *qmp = dev_get_drvdata(dev);
> - struct qmp_phy *qphy = qmp->phys[0];
> + struct qmp_phy *qphy = qmp->usb_phy;
> const struct qmp_phy_cfg *cfg = qphy->cfg;
>
> dev_vdbg(dev, "Suspending QMP phy, mode:%d\n", qphy->mode);
>
> - /* Supported only for USB3 PHY and luckily USB3 is the first phy */
> - if (cfg->type != PHY_TYPE_USB3)
> - return 0;

This is still not correct as this code would now be executed also for
PCIe and UFS PHYs, which wasn't the case before.

> -
> if (!qmp->init_count) {
> dev_vdbg(dev, "PHY not initialized, bailing out\n");
> return 0;

Johan

2023-02-02 21:50:31

by Stephen Boyd

Subject: Re: [PATCH 5.15.y v2 5/5] phy: qcom-qmp-combo: fix runtime suspend

Quoting Johan Hovold (2023-01-23 02:48:01)
> On Fri, Jan 13, 2023 at 12:45:48PM -0800, Stephen Boyd wrote:
> > diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
> > index b8646eaf1767..64a42e28e99f 100644
> > --- a/drivers/phy/qualcomm/phy-qcom-qmp.c
> > +++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
> > @@ -4985,15 +4985,11 @@ static void qcom_qmp_phy_disable_autonomous_mode(struct qmp_phy *qphy)
> > static int __maybe_unused qcom_qmp_phy_runtime_suspend(struct device *dev)
> > {
> > struct qcom_qmp *qmp = dev_get_drvdata(dev);
> > - struct qmp_phy *qphy = qmp->phys[0];
> > + struct qmp_phy *qphy = qmp->usb_phy;
> > const struct qmp_phy_cfg *cfg = qphy->cfg;
> >
> > dev_vdbg(dev, "Suspending QMP phy, mode:%d\n", qphy->mode);
> >
> > - /* Supported only for USB3 PHY and luckily USB3 is the first phy */
> > - if (cfg->type != PHY_TYPE_USB3)
> > - return 0;
>
> This is still not correct as this code would now be executed also for
> PCIe and UFS PHYs, which wasn't the case before.

Ah right. So weirdly, the conditional should be kept.