[Linux-stable-mirror] [PATCH v2] usb: dwc3: core: Fix ULPI PHYs and prevent phy_get/ulpi_init during suspend/resume
In order for ULPI PHYs to work, dwc3_phy_setup() and dwc3_ulpi_init() must be doene before dwc3_core_get_phy().
commit 541768b08a40 ("usb: dwc3: core: Call dwc3_core_get_phy() before initializing phys") broke this.
The other issue is that dwc3_core_get_phy() and dwc3_ulpi_init() should be called only once during the life cycle of the driver. However, as dwc3_core_init() is called during system suspend/resume it will result in multiple calls to dwc3_core_get_phy() and dwc3_ulpi_init() which is wrong.
Fix this by moving dwc3_ulpi_init() out of dwc3_phy_setup() into dwc3_core_ulpi_init(). Use a flag 'ulpi_ready' to ensure that dwc3_core_ulpi_init() is called only once from dwc3_core_init().
Use another flag 'phys_ready' to call dwc3_core_get_phy() only once from dwc3_core_init().
Fixes: 541768b08a40 ("usb: dwc3: core: Call dwc3_core_get_phy() before initializing phys") Fixes: f54edb539c11 ("usb: dwc3: core: initialize ULPI before trying to get the PHY") Cc: linux-stable stable@vger.kernel.org # >= v4.13 Signed-off-by: Roger Quadros rogerq@ti.com ---
Changelog: v2: - don't break ULPI case. Also take into consideration suspend/resume for ULPI case.
drivers/usb/dwc3/core.c | 47 ++++++++++++++++++++++++++++++++++++----------- drivers/usb/dwc3/core.h | 5 +++++ 2 files changed, 41 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 0783250..84382f6 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -482,6 +482,22 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc) parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); }
+static int dwc3_core_ulpi_init(struct dwc3 *dwc) +{ + int intf; + int ret = 0; + + intf = DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3); + + if (intf == DWC3_GHWPARAMS3_HSPHY_IFC_ULPI || + (intf == DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI && + dwc->hsphy_interface && + !strncmp(dwc->hsphy_interface, "ulpi", 4))) + ret = dwc3_ulpi_init(dwc); + + return ret; +} + /** * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core * @dwc: Pointer to our controller context structure @@ -493,7 +509,6 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc) static int dwc3_phy_setup(struct dwc3 *dwc) { u32 reg; - int ret;
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
@@ -564,9 +579,6 @@ static int dwc3_phy_setup(struct dwc3 *dwc) } /* FALLTHROUGH */ case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI: - ret = dwc3_ulpi_init(dwc); - if (ret) - return ret; /* FALLTHROUGH */ default: break; @@ -723,6 +735,7 @@ static void dwc3_core_setup_global_control(struct dwc3 *dwc) }
static int dwc3_core_get_phy(struct dwc3 *dwc); +static int dwc3_core_ulpi_init(struct dwc3 *dwc);
/** * dwc3_core_init - Low-level initialization of DWC3 Core @@ -754,17 +767,27 @@ static int dwc3_core_init(struct dwc3 *dwc) dwc->maximum_speed = USB_SPEED_HIGH; }
- ret = dwc3_core_get_phy(dwc); + ret = dwc3_phy_setup(dwc); if (ret) goto err0;
- ret = dwc3_core_soft_reset(dwc); - if (ret) - goto err0; + if (!dwc->ulpi_ready) { + ret = dwc3_core_ulpi_init(dwc); + if (ret) + goto err0; + dwc->ulpi_ready = true; + }
- ret = dwc3_phy_setup(dwc); + if (!dwc->phys_ready) { + ret = dwc3_core_get_phy(dwc); + if (ret) + goto err0a; + dwc->phys_ready = true; + } + + ret = dwc3_core_soft_reset(dwc); if (ret) - goto err0; + goto err0a;
dwc3_core_setup_global_control(dwc); dwc3_core_num_eps(dwc); @@ -837,6 +860,9 @@ static int dwc3_core_init(struct dwc3 *dwc) phy_exit(dwc->usb2_generic_phy); phy_exit(dwc->usb3_generic_phy);
+err0a: + dwc3_ulpi_exit(dwc); + err0: return ret; } @@ -1229,7 +1255,6 @@ static int dwc3_probe(struct platform_device *pdev)
err3: dwc3_free_event_buffers(dwc); - dwc3_ulpi_exit(dwc);
err2: pm_runtime_allow(&pdev->dev); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 4a4a4c9..6b202e3 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -795,7 +795,9 @@ struct dwc3_scratchpad_array { * @usb3_phy: pointer to USB3 PHY * @usb2_generic_phy: pointer to USB2 PHY * @usb3_generic_phy: pointer to USB3 PHY + * @phys_ready: flag to indicate that PHYs are ready * @ulpi: pointer to ulpi interface + * @ulpi_ready: flag to indicate that ULPI is initialized * @isoch_delay: wValue from Set Isochronous Delay request; * @u2sel: parameter from Set SEL request. * @u2pel: parameter from Set SEL request. @@ -893,7 +895,10 @@ struct dwc3 { struct phy *usb2_generic_phy; struct phy *usb3_generic_phy;
+ bool phys_ready; + struct ulpi *ulpi; + bool ulpi_ready;
void __iomem *regs; size_t regs_size;
In order for ULPI PHYs to work, dwc3_phy_setup() and dwc3_ulpi_init() must be doene before dwc3_core_get_phy().
commit 541768b08a40 ("usb: dwc3: core: Call dwc3_core_get_phy() before initializing phys") broke this.
The other issue is that dwc3_core_get_phy() and dwc3_ulpi_init() should be called only once during the life cycle of the driver. However, as dwc3_core_init() is called during system suspend/resume it will result in multiple calls to dwc3_core_get_phy() and dwc3_ulpi_init() which is wrong.
Fix this by moving dwc3_ulpi_init() out of dwc3_phy_setup() into dwc3_core_ulpi_init(). Use a flag 'ulpi_ready' to ensure that dwc3_core_ulpi_init() is called only once from dwc3_core_init().
Use another flag 'phys_ready' to call dwc3_core_get_phy() only once from dwc3_core_init().
Fixes: 541768b08a40 ("usb: dwc3: core: Call dwc3_core_get_phy() before initializing phys") Fixes: f54edb539c11 ("usb: dwc3: core: initialize ULPI before trying to get the PHY") Cc: linux-stable stable@vger.kernel.org # >= v4.13 Signed-off-by: Roger Quadros rogerq@ti.com --- Rebased on Felipe's testing/fixes branch.
drivers/usb/dwc3/core.c | 47 ++++++++++++++++++++++++++++++++++++----------- drivers/usb/dwc3/core.h | 5 +++++ 2 files changed, 41 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 59511f2..f1d838a 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -486,6 +486,22 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc) parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); }
+static int dwc3_core_ulpi_init(struct dwc3 *dwc) +{ + int intf; + int ret = 0; + + intf = DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3); + + if (intf == DWC3_GHWPARAMS3_HSPHY_IFC_ULPI || + (intf == DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI && + dwc->hsphy_interface && + !strncmp(dwc->hsphy_interface, "ulpi", 4))) + ret = dwc3_ulpi_init(dwc); + + return ret; +} + /** * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core * @dwc: Pointer to our controller context structure @@ -497,7 +513,6 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc) static int dwc3_phy_setup(struct dwc3 *dwc) { u32 reg; - int ret;
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
@@ -568,9 +583,6 @@ static int dwc3_phy_setup(struct dwc3 *dwc) } /* FALLTHROUGH */ case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI: - ret = dwc3_ulpi_init(dwc); - if (ret) - return ret; /* FALLTHROUGH */ default: break; @@ -727,6 +739,7 @@ static void dwc3_core_setup_global_control(struct dwc3 *dwc) }
static int dwc3_core_get_phy(struct dwc3 *dwc); +static int dwc3_core_ulpi_init(struct dwc3 *dwc);
/** * dwc3_core_init - Low-level initialization of DWC3 Core @@ -758,17 +771,27 @@ static int dwc3_core_init(struct dwc3 *dwc) dwc->maximum_speed = USB_SPEED_HIGH; }
- ret = dwc3_core_get_phy(dwc); + ret = dwc3_phy_setup(dwc); if (ret) goto err0;
- ret = dwc3_core_soft_reset(dwc); - if (ret) - goto err0; + if (!dwc->ulpi_ready) { + ret = dwc3_core_ulpi_init(dwc); + if (ret) + goto err0; + dwc->ulpi_ready = true; + }
- ret = dwc3_phy_setup(dwc); + if (!dwc->phys_ready) { + ret = dwc3_core_get_phy(dwc); + if (ret) + goto err0a; + dwc->phys_ready = true; + } + + ret = dwc3_core_soft_reset(dwc); if (ret) - goto err0; + goto err0a;
dwc3_core_setup_global_control(dwc); dwc3_core_num_eps(dwc); @@ -841,6 +864,9 @@ static int dwc3_core_init(struct dwc3 *dwc) phy_exit(dwc->usb2_generic_phy); phy_exit(dwc->usb3_generic_phy);
+err0a: + dwc3_ulpi_exit(dwc); + err0: return ret; } @@ -1235,7 +1261,6 @@ static int dwc3_probe(struct platform_device *pdev)
err3: dwc3_free_event_buffers(dwc); - dwc3_ulpi_exit(dwc);
err2: pm_runtime_allow(&pdev->dev); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 185b960..860d2bc 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -797,7 +797,9 @@ struct dwc3_scratchpad_array { * @usb3_phy: pointer to USB3 PHY * @usb2_generic_phy: pointer to USB2 PHY * @usb3_generic_phy: pointer to USB3 PHY + * @phys_ready: flag to indicate that PHYs are ready * @ulpi: pointer to ulpi interface + * @ulpi_ready: flag to indicate that ULPI is initialized * @u2sel: parameter from Set SEL request. * @u2pel: parameter from Set SEL request. * @u1sel: parameter from Set SEL request. @@ -895,7 +897,10 @@ struct dwc3 { struct phy *usb2_generic_phy; struct phy *usb3_generic_phy;
+ bool phys_ready; + struct ulpi *ulpi; + bool ulpi_ready;
void __iomem *regs; size_t regs_size;
Hello,
After I apply this patch on 4.14 (or receive it with 4.14.70) I see a regression with the Qualcomm QUSB2 phy driver. I'm testing on a Dragonboard 820c. In boot log I get:
[ 4.525502] phy phy-7412000.phy.6: QUSB2PHY pll lock failed: status reg = 0 [ 4.529232] phy phy-7412000.phy.6: phy init failed --> -16 [ 4.536170] dwc3 7600000.dwc3: failed to initialize core [ 4.541743] dwc3: probe of 7600000.dwc3 failed with error -16 [ 4.549979] phy phy-7411000.phy.5: QUSB2PHY pll lock failed: status reg = 0 [ 4.552843] phy phy-7411000.phy.5: phy init failed --> -16 [ 4.559606] dwc3 6a00000.dwc3: failed to initialize core [ 4.565181] dwc3: probe of 6a00000.dwc3 failed with error -16
I can provide a full log if needed.
Best regards, Todor
On 12.02.2018 15:30, Roger Quadros wrote:
In order for ULPI PHYs to work, dwc3_phy_setup() and dwc3_ulpi_init() must be doene before dwc3_core_get_phy().
commit 541768b08a40 ("usb: dwc3: core: Call dwc3_core_get_phy() before initializing phys") broke this.
The other issue is that dwc3_core_get_phy() and dwc3_ulpi_init() should be called only once during the life cycle of the driver. However, as dwc3_core_init() is called during system suspend/resume it will result in multiple calls to dwc3_core_get_phy() and dwc3_ulpi_init() which is wrong.
Fix this by moving dwc3_ulpi_init() out of dwc3_phy_setup() into dwc3_core_ulpi_init(). Use a flag 'ulpi_ready' to ensure that dwc3_core_ulpi_init() is called only once from dwc3_core_init().
Use another flag 'phys_ready' to call dwc3_core_get_phy() only once from dwc3_core_init().
Fixes: 541768b08a40 ("usb: dwc3: core: Call dwc3_core_get_phy() before initializing phys") Fixes: f54edb539c11 ("usb: dwc3: core: initialize ULPI before trying to get the PHY") Cc: linux-stable stable@vger.kernel.org # >= v4.13 Signed-off-by: Roger Quadros rogerq@ti.com
Rebased on Felipe's testing/fixes branch.
drivers/usb/dwc3/core.c | 47 ++++++++++++++++++++++++++++++++++++----------- drivers/usb/dwc3/core.h | 5 +++++ 2 files changed, 41 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 59511f2..f1d838a 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -486,6 +486,22 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc) parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); } +static int dwc3_core_ulpi_init(struct dwc3 *dwc) +{
- int intf;
- int ret = 0;
- intf = DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3);
- if (intf == DWC3_GHWPARAMS3_HSPHY_IFC_ULPI ||
(intf == DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI &&dwc->hsphy_interface &&!strncmp(dwc->hsphy_interface, "ulpi", 4)))ret = dwc3_ulpi_init(dwc);- return ret;
+}
/**
- dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
- @dwc: Pointer to our controller context structure
@@ -497,7 +513,6 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc) static int dwc3_phy_setup(struct dwc3 *dwc) { u32 reg;
- int ret;
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); @@ -568,9 +583,6 @@ static int dwc3_phy_setup(struct dwc3 *dwc) } /* FALLTHROUGH */ case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
ret = dwc3_ulpi_init(dwc);if (ret)return ret;@@ -727,6 +739,7 @@ static void dwc3_core_setup_global_control(struct dwc3 *dwc) } static int dwc3_core_get_phy(struct dwc3 *dwc); +static int dwc3_core_ulpi_init(struct dwc3 *dwc); /**
- dwc3_core_init - Low-level initialization of DWC3 Core
@@ -758,17 +771,27 @@ static int dwc3_core_init(struct dwc3 *dwc) dwc->maximum_speed = USB_SPEED_HIGH; }
- ret = dwc3_core_get_phy(dwc);
- ret = dwc3_phy_setup(dwc); if (ret) goto err0;
- ret = dwc3_core_soft_reset(dwc);
- if (ret)
goto err0;
- if (!dwc->ulpi_ready) {
ret = dwc3_core_ulpi_init(dwc);if (ret)goto err0;dwc->ulpi_ready = true;- }
- ret = dwc3_phy_setup(dwc);
- if (!dwc->phys_ready) {
ret = dwc3_core_get_phy(dwc);if (ret)goto err0a;dwc->phys_ready = true;- }
- ret = dwc3_core_soft_reset(dwc); if (ret)
goto err0;
goto err0a;dwc3_core_setup_global_control(dwc); dwc3_core_num_eps(dwc); @@ -841,6 +864,9 @@ static int dwc3_core_init(struct dwc3 *dwc) phy_exit(dwc->usb2_generic_phy); phy_exit(dwc->usb3_generic_phy); +err0a:
- dwc3_ulpi_exit(dwc);
err0: return ret; } @@ -1235,7 +1261,6 @@ static int dwc3_probe(struct platform_device *pdev) err3: dwc3_free_event_buffers(dwc);
- dwc3_ulpi_exit(dwc);
err2: pm_runtime_allow(&pdev->dev); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 185b960..860d2bc 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -797,7 +797,9 @@ struct dwc3_scratchpad_array {
- @usb3_phy: pointer to USB3 PHY
- @usb2_generic_phy: pointer to USB2 PHY
- @usb3_generic_phy: pointer to USB3 PHY
- @phys_ready: flag to indicate that PHYs are ready
- @ulpi: pointer to ulpi interface
- @ulpi_ready: flag to indicate that ULPI is initialized
- @u2sel: parameter from Set SEL request.
- @u2pel: parameter from Set SEL request.
- @u1sel: parameter from Set SEL request.
@@ -895,7 +897,10 @@ struct dwc3 { struct phy *usb2_generic_phy; struct phy *usb3_generic_phy;
- bool phys_ready;
- struct ulpi *ulpi;
- bool ulpi_ready;
void __iomem *regs; size_t regs_size;
Hi,
Todor Tomov todor.tomov@linaro.org writes:
Hello,
After I apply this patch on 4.14 (or receive it with 4.14.70) I see a regression with the Qualcomm QUSB2 phy driver. I'm testing on a Dragonboard 820c. In boot log I get:
[ 4.525502] phy phy-7412000.phy.6: QUSB2PHY pll lock failed: status reg = 0 [ 4.529232] phy phy-7412000.phy.6: phy init failed --> -16 [ 4.536170] dwc3 7600000.dwc3: failed to initialize core [ 4.541743] dwc3: probe of 7600000.dwc3 failed with error -16 [ 4.549979] phy phy-7411000.phy.5: QUSB2PHY pll lock failed: status reg = 0 [ 4.552843] phy phy-7411000.phy.5: phy init failed --> -16 [ 4.559606] dwc3 6a00000.dwc3: failed to initialize core [ 4.565181] dwc3: probe of 6a00000.dwc3 failed with error -16
I can provide a full log if needed.
please do. Also, try mainline and let us know if the problem persists. Why do you get -EBUSY from the PHY driver?
- balbi
Hi,
On 15.11.2018 10:09, Felipe Balbi wrote:
Hi,
Todor Tomov todor.tomov@linaro.org writes:
Hello,
After I apply this patch on 4.14 (or receive it with 4.14.70) I see a regression with the Qualcomm QUSB2 phy driver. I'm testing on a Dragonboard 820c. In boot log I get:
[ 4.525502] phy phy-7412000.phy.6: QUSB2PHY pll lock failed: status reg = 0 [ 4.529232] phy phy-7412000.phy.6: phy init failed --> -16 [ 4.536170] dwc3 7600000.dwc3: failed to initialize core [ 4.541743] dwc3: probe of 7600000.dwc3 failed with error -16 [ 4.549979] phy phy-7411000.phy.5: QUSB2PHY pll lock failed: status reg = 0 [ 4.552843] phy phy-7411000.phy.5: phy init failed --> -16 [ 4.559606] dwc3 6a00000.dwc3: failed to initialize core [ 4.565181] dwc3: probe of 6a00000.dwc3 failed with error -16
I can provide a full log if needed.
please do. Also, try mainline and let us know if the problem
This is the full log on 4.14.69 + this patch: https://paste.ubuntu.com/p/N5WdHw47QC/ I also managed to get a log from 4.20.0-rc2 and I see the same error: https://paste.ubuntu.com/p/jz6fvYyZh6/
persists. Why do you get -EBUSY from the PHY driver?
Maybe I could have proposed a fix if I knew but I don't know.
Best regards, Todor
balbi
Hi Felipe,
On 16.11.2018 19:01, Todor Tomov wrote:
Hi,
On 15.11.2018 10:09, Felipe Balbi wrote:
Hi,
Todor Tomov todor.tomov@linaro.org writes:
Hello,
After I apply this patch on 4.14 (or receive it with 4.14.70) I see a regression with the Qualcomm QUSB2 phy driver. I'm testing on a Dragonboard 820c. In boot log I get:
[ 4.525502] phy phy-7412000.phy.6: QUSB2PHY pll lock failed: status reg = 0 [ 4.529232] phy phy-7412000.phy.6: phy init failed --> -16 [ 4.536170] dwc3 7600000.dwc3: failed to initialize core [ 4.541743] dwc3: probe of 7600000.dwc3 failed with error -16 [ 4.549979] phy phy-7411000.phy.5: QUSB2PHY pll lock failed: status reg = 0 [ 4.552843] phy phy-7411000.phy.5: phy init failed --> -16 [ 4.559606] dwc3 6a00000.dwc3: failed to initialize core [ 4.565181] dwc3: probe of 6a00000.dwc3 failed with error -16
I can provide a full log if needed.
please do. Also, try mainline and let us know if the problem
This is the full log on 4.14.69 + this patch: https://paste.ubuntu.com/p/N5WdHw47QC/ I also managed to get a log from 4.20.0-rc2 and I see the same error: https://paste.udwc3_phy_setupbuntu.com/p/jz6fvYyZh6/
persists. Why do you get -EBUSY from the PHY driver?
Maybe I could have proposed a fix if I knew but I don't know.
I have done some debugging but I still cannot understand it completely.
What I see is that if the PHY interface is configured first (dwc3_phy_setup) then the PHY init (qusb2_phy_init called by dwc3_core_soft_reset) fails with "pll lock failed". If we move dwc3_phy_setup after dwc3_core_soft_reset as it was before this patch, it works.
Do you have any ideas why this happens or how to solve it?
Thank you. Best regards, Todor
Hi Felipe,
On 26.11.2018 10:27, Todor Tomov wrote:
Hi Felipe,
On 16.11.2018 19:01, Todor Tomov wrote:
Hi,
On 15.11.2018 10:09, Felipe Balbi wrote:
Hi,
Todor Tomov todor.tomov@linaro.org writes:
Hello,
After I apply this patch on 4.14 (or receive it with 4.14.70) I see a regression with the Qualcomm QUSB2 phy driver. I'm testing on a Dragonboard 820c. In boot log I get:
[ 4.525502] phy phy-7412000.phy.6: QUSB2PHY pll lock failed: status reg = 0 [ 4.529232] phy phy-7412000.phy.6: phy init failed --> -16 [ 4.536170] dwc3 7600000.dwc3: failed to initialize core [ 4.541743] dwc3: probe of 7600000.dwc3 failed with error -16 [ 4.549979] phy phy-7411000.phy.5: QUSB2PHY pll lock failed: status reg = 0 [ 4.552843] phy phy-7411000.phy.5: phy init failed --> -16 [ 4.559606] dwc3 6a00000.dwc3: failed to initialize core [ 4.565181] dwc3: probe of 6a00000.dwc3 failed with error -16
I can provide a full log if needed.
please do. Also, try mainline and let us know if the problem
This is the full log on 4.14.69 + this patch: https://paste.ubuntu.com/p/N5WdHw47QC/ I also managed to get a log from 4.20.0-rc2 and I see the same error: https://paste.udwc3_phy_setupbuntu.com/p/jz6fvYyZh6/
persists. Why do you get -EBUSY from the PHY driver?
Maybe I could have proposed a fix if I knew but I don't know.
I have done some debugging but I still cannot understand it completely.
What I see is that if the PHY interface is configured first (dwc3_phy_setup) then the PHY init (qusb2_phy_init called by dwc3_core_soft_reset) fails with "pll lock failed". If we move dwc3_phy_setup after dwc3_core_soft_reset as it was before this patch, it works.
I have found that during dwc3_phy_setup the PHY interface is configured to suspend and this is what breaks the QUSB2 PHY initialization. It seems that it can be fixed by adding the "snps,dis_u2_susphy_quirk" quirk in device tree. If this approach proves correct, I'll send the patch upstream.
Best regards, Todor
Do you have any ideas why this happens or how to solve it?
Thank you. Best regards, Todor
Hi,
Todor Tomov todor.tomov@linaro.org writes:
After I apply this patch on 4.14 (or receive it with 4.14.70) I see a regression with the Qualcomm QUSB2 phy driver. I'm testing on a Dragonboard 820c. In boot log I get:
[ 4.525502] phy phy-7412000.phy.6: QUSB2PHY pll lock failed: status reg = 0 [ 4.529232] phy phy-7412000.phy.6: phy init failed --> -16 [ 4.536170] dwc3 7600000.dwc3: failed to initialize core [ 4.541743] dwc3: probe of 7600000.dwc3 failed with error -16 [ 4.549979] phy phy-7411000.phy.5: QUSB2PHY pll lock failed: status reg = 0 [ 4.552843] phy phy-7411000.phy.5: phy init failed --> -16 [ 4.559606] dwc3 6a00000.dwc3: failed to initialize core [ 4.565181] dwc3: probe of 6a00000.dwc3 failed with error -16
I can provide a full log if needed.
please do. Also, try mainline and let us know if the problem
This is the full log on 4.14.69 + this patch: https://paste.ubuntu.com/p/N5WdHw47QC/ I also managed to get a log from 4.20.0-rc2 and I see the same error: https://paste.udwc3_phy_setupbuntu.com/p/jz6fvYyZh6/
persists. Why do you get -EBUSY from the PHY driver?
Maybe I could have proposed a fix if I knew but I don't know.
I have done some debugging but I still cannot understand it completely.
What I see is that if the PHY interface is configured first (dwc3_phy_setup) then the PHY init (qusb2_phy_init called by dwc3_core_soft_reset) fails with "pll lock failed". If we move dwc3_phy_setup after dwc3_core_soft_reset as it was before this patch, it works.
I have found that during dwc3_phy_setup the PHY interface is configured to suspend and this is what breaks the QUSB2 PHY initialization. It seems that it can be fixed by adding the "snps,dis_u2_susphy_quirk" quirk in device tree. If this approach proves correct, I'll send the patch upstream.
That's the correct way, yes.
Thanks
linux-stable-mirror@lists.linaro.org
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Felipe Balbi -
Roger Quadros -
Todor Tomov