FROMLIST: bus: mhi: host: pci_generic: Switch to async power up to avoid boot delays#945
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ziyuezhang-123 wants to merge 2 commits intoqualcomm-linux:tech/bus/pci/allfrom
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FROMLIST: bus: mhi: host: pci_generic: Switch to async power up to avoid boot delays#945ziyuezhang-123 wants to merge 2 commits intoqualcomm-linux:tech/bus/pci/allfrom
ziyuezhang-123 wants to merge 2 commits intoqualcomm-linux:tech/bus/pci/allfrom
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added 2 commits
April 15, 2026 14:27
…oid boot delays Some modem devices can take significant time (up to 20 secs for sdx75) to enter mission mode during initialization. Currently, mhi_sync_power_up() waits for this entire process to complete, blocking other driver probes and delaying system boot. Switch to mhi_async_power_up() so probe can return immediately while MHI initialization continues in the background. This eliminates lengthy boot delays and allows other drivers to probe in parallel, improving overall system boot performance. Link: https://lore.kernel.org/all/20260303-b4-async_power_on-v2-1-d3db81eb457d@oss.qualcomm.com/ Fixes: 5571519 ("bus: mhi: host: pci_generic: Add SDX75 based modem support") Cc: stable@vger.kernel.org Signed-off-by: Qiang Yu <qiang.yu@oss.qualcomm.com>
…ove callback Add pm_runtime_forbid() to balance the pm_runtime_allow() call made during probe. Without this, the device remains in runtime PM allowed state after driver removal. Link: https://lore.kernel.org/all/20260303-b4-async_power_on-v2-2-d3db81eb457d@oss.qualcomm.com/ Fixes: 855a70c ("bus: mhi: Add MHI PCI support for WWAN modems") Signed-off-by: Qiang Yu <qiang.yu@oss.qualcomm.com>
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Some modem devices can take significant time (up to 20 secs for sdx75) to
enter mission mode during initialization. Currently, mhi_sync_power_up()
waits for this entire process to complete, blocking other driver probes
and delaying system boot.
Switch to mhi_async_power_up() so probe can return immediately while MHI
initialization continues in the background. This eliminates lengthy boot
delays and allows other drivers to probe in parallel, improving overall
system boot performance.
CRs-Fixed: 4468490