Bug fixes and improvements for MHI powerup and shutdown handling.
Firmware load function names are updated to accurately reflect their purpose.
Closed certain design gaps where the host (MHI bus) would allow clients to
operate after a power down or error detection.
Move to an error state sooner based on different scenarios.
These patches were tested on arm64 and X86_64 architectures.
v3:
-Fixed bus: mhi: core: Remove MHI event ring IRQ handlers when powering down
-Mistakenly placed the free_irq() calls in mhi_pm_sys_error_transition()
-Moved it to mhi_pm_disable_transition()
v2:
-Addressed patches based on review comments and made improvements
-Added bus: mhi: core: Check for IRQ availability during registration
-Dropped bus: mhi: core: Use the IRQF_ONESHOT flag for the BHI interrupt line
-Split bus: mhi: core: Move to an error state on any firmware load failure
-Modified the following patches:
-bus: mhi: core: Disable IRQs when powering down
-bus: mhi: core: Improve shutdown handling after link down detection
-bus: mhi: core: Mark device inactive soon after host issues a shutdown
-bus: mhi: core: Move to SYS_ERROR regardless of RDDM capability
-Addressed the above as follow-up patches with improvements:
-bus: mhi: core: Prevent sending multiple RDDM entry callbacks
-bus: mhi: core: Separate system error and power down handling
-bus: mhi: core: Remove MHI event ring IRQ handlers when powering down
Bhaumik Bhatt (12):
bus: mhi: core: Use appropriate names for firmware load functions
bus: mhi: core: Move to using high priority workqueue
bus: mhi: core: Skip device wake in error or shutdown states
bus: mhi: core: Move to SYS_ERROR regardless of RDDM capability
bus: mhi: core: Prevent sending multiple RDDM entry callbacks
bus: mhi: core: Move to an error state on any firmware load failure
bus: mhi: core: Use appropriate label in firmware load handler API
bus: mhi: core: Move to an error state on mission mode failure
bus: mhi: core: Check for IRQ availability during registration
bus: mhi: core: Separate system error and power down handling
bus: mhi: core: Mark and maintain device states early on after power
down
bus: mhi: core: Remove MHI event ring IRQ handlers when powering down
drivers/bus/mhi/core/boot.c | 60 ++++++-----
drivers/bus/mhi/core/init.c | 10 +-
drivers/bus/mhi/core/main.c | 16 +--
drivers/bus/mhi/core/pm.c | 236 ++++++++++++++++++++++++++++++++------------
include/linux/mhi.h | 2 +
5 files changed, 225 insertions(+), 99 deletions(-)
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