mirror of
https://github.com/coolsnowwolf/lede.git
synced 2025-04-16 04:13:31 +00:00
aa3f8bc738
Fixed "generic" and "ipq807x" sections. Signed-off-by: José Hwong <88561480+JoseCoW@users.noreply.github.com>
82 lines
2.5 KiB
Diff
82 lines
2.5 KiB
Diff
--- a/drivers/bus/mhi/core/pm.c
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+++ b/drivers/bus/mhi/core/pm.c
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@@ -767,7 +767,7 @@ int mhi_pm_suspend(struct mhi_controller *mhi_cntrl)
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}
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EXPORT_SYMBOL_GPL(mhi_pm_suspend);
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-int mhi_pm_resume(struct mhi_controller *mhi_cntrl)
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+static int __mhi_pm_resume(struct mhi_controller *mhi_cntrl, bool force)
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{
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struct mhi_chan *itr, *tmp;
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struct device *dev = &mhi_cntrl->mhi_dev->dev;
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@@ -783,6 +783,13 @@
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if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state))
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return -EIO;
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+
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+ if (mhi_get_mhi_state(mhi_cntrl) != MHI_STATE_M3) {
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+ dev_warn(dev, "Resuming from non M3 state (%s)\n",
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+ TO_MHI_STATE_STR(mhi_get_mhi_state(mhi_cntrl)));
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+ if (!force)
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+ return -EINVAL;
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+ }
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/* Notify clients about exiting LPM */
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list_for_each_entry_safe(itr, tmp, &mhi_cntrl->lpm_chans, node) {
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@@ -823,8 +830,19 @@ int mhi_pm_resume(struct mhi_controller *mhi_cntrl)
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return 0;
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}
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+
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+int mhi_pm_resume(struct mhi_controller *mhi_cntrl)
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+{
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+ return __mhi_pm_resume(mhi_cntrl, false);
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+}
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EXPORT_SYMBOL_GPL(mhi_pm_resume);
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+int mhi_pm_resume_force(struct mhi_controller *mhi_cntrl)
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+{
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+ return __mhi_pm_resume(mhi_cntrl, true);
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+}
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+EXPORT_SYMBOL_GPL(mhi_pm_resume_force);
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+
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int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl)
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{
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int ret;
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--- a/drivers/net/wireless/ath/ath11k/mhi.c
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+++ b/drivers/net/wireless/ath/ath11k/mhi.c
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@@ -415,6 +415,11 @@
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case ATH11K_MHI_SUSPEND:
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break;
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case ATH11K_MHI_RESUME:
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+ /* Do force MHI resume as some devices like QCA6390, WCN6855
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+ * are not in M3 state but they are functional. So just ignore
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+ * the MHI state while resuming.
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+ */
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+ ret = mhi_pm_resume_force(ab_pci->mhi_ctrl);
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break;
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case ATH11K_MHI_TRIGGER_RDDM:
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ret = mhi_force_rddm_mode(ab_pci->mhi_ctrl);
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--- a/include/linux/mhi.h
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+++ b/include/linux/mhi.h
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@@ -646,6 +646,19 @@ int mhi_pm_suspend(struct mhi_controller *mhi_cntrl);
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*/
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int mhi_pm_resume(struct mhi_controller *mhi_cntrl);
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+/**
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+ * mhi_pm_resume_force - Force resume MHI from suspended state
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+ * @mhi_cntrl: MHI controller
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+ *
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+ * Resume the device irrespective of its MHI state. As per the MHI spec, devices
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+ * has to be in M3 state during resume. But some devices seem to be in a
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+ * different MHI state other than M3 but they continue working fine if allowed.
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+ * This API is intented to be used for such devices.
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+ *
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+ * Return: 0 if the resume succeeds, a negative error code otherwise
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+ */
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+int mhi_pm_resume_force(struct mhi_controller *mhi_cntrl);
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+
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/**
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* mhi_download_rddm_img - Download ramdump image from device for
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* debugging purpose.
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