Hi,
This series enables USB3 Type-C lane orientation detection and configuration on platforms that support this (Google gs101), and it also allows the DWC3 core to enter runtime suspend even when UDC is active.
For lane orientation, this driver now optionally (based on DT) subscribes to the TCPC's lane orientation notifier and remembers the orientation to later be used during phy_init().
To enable DWC3 runtime suspend, the gadget needs to inform the core via dwc3_gadget_interrupt() with event type == DWC3_DEVICE_EVENT_DISCONNECT of a cable disconnect. For that to allow to happen, this driver therefore needs to stop forcing the Vbus and bvalid signals to active and instead change their state based on actual conditions. The same TCPC notifier is used to detect this, and program the hardware accordingly.
That signal state is based on advice given by Thinh in https://lore.kernel.org/all/20240813230625.jgkatqstyhcmpezv@synopsys.com/
Both changes together now allow cable orientation detection to work, as the DWC3 will now call phy_exit() on cable disconnect, and we can reprogram the lane mux in phy_init().
On top of that, there are some small related cleanup patches.
Signed-off-by: André Draszik andre.draszik@linaro.org --- Changes in v2: - squash patches #2 and #3 from v1 to actually disallow orientation-switch on !gs101 (not just optional) (Conor) - update bindings commit message to clarify that the intention for the driver is to work with old and new DTS (Conor) - add cc-stable and fixes tags to power gating patch (Krzysztof) - fix an #include and typo (Peter) - Link to v1: https://lore.kernel.org/r/20241127-gs101-phy-lanes-orientation-phy-v1-0-1b7f...
--- André Draszik (8): dt-bindings: phy: samsung,usb3-drd-phy: align to universal style dt-bindings: phy: samsung,usb3-drd-phy: gs101: require Type-C properties phy: exynos5-usbdrd: convert to dev_err_probe phy: exynos5-usbdrd: fix EDS distribution tuning (gs101) phy: exynos5-usbdrd: gs101: ensure power is gated to SS phy in phy_exit() phy: exynos5-usbdrd: gs101: configure SS lanes based on orientation phy: exynos5-usbdrd: subscribe to orientation notifier if required phy: exynos5-usbdrd: allow DWC3 runtime suspend with UDC bound (E850+)
.../bindings/phy/samsung,usb3-drd-phy.yaml | 24 +++ drivers/phy/samsung/Kconfig | 1 + drivers/phy/samsung/phy-exynos5-usbdrd.c | 223 ++++++++++++++++----- 3 files changed, 202 insertions(+), 46 deletions(-) --- base-commit: ed9a4ad6e5bd3a443e81446476718abebee47e82 change-id: 20241127-gs101-phy-lanes-orientation-phy-29d20c6d84d2
Best regards,
We currently don't gate the power to the SS phy in phy_exit().
Shuffle the code slightly to ensure the power is gated to the SS phy as well.
Fixes: 32267c29bc7d ("phy: exynos5-usbdrd: support Exynos USBDRD 3.1 combo phy (HS & SS)") CC: stable@vger.kernel.org # 6.11+ Reviewed-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Reviewed-by: Peter Griffin peter.griffin@linaro.org Signed-off-by: André Draszik andre.draszik@linaro.org
--- v2: * add cc-stable and fixes tags (Krzysztof) * collect tags --- drivers/phy/samsung/phy-exynos5-usbdrd.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/phy/samsung/phy-exynos5-usbdrd.c b/drivers/phy/samsung/phy-exynos5-usbdrd.c index 2a724d362c2d..c1ce6fdeef31 100644 --- a/drivers/phy/samsung/phy-exynos5-usbdrd.c +++ b/drivers/phy/samsung/phy-exynos5-usbdrd.c @@ -1296,14 +1296,17 @@ static int exynos5_usbdrd_gs101_phy_exit(struct phy *phy) struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); int ret;
+ if (inst->phy_cfg->id == EXYNOS5_DRDPHY_UTMI) { + ret = exynos850_usbdrd_phy_exit(phy); + if (ret) + return ret; + } + + exynos5_usbdrd_phy_isol(inst, true); + if (inst->phy_cfg->id != EXYNOS5_DRDPHY_UTMI) return 0;
- ret = exynos850_usbdrd_phy_exit(phy); - if (ret) - return ret; - - exynos5_usbdrd_phy_isol(inst, true); return regulator_bulk_disable(phy_drd->drv_data->n_regulators, phy_drd->regulators); }
linux-stable-mirror@lists.linaro.org
-
André Draszik