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| author |   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2020-09-08 21:45:17 +0800 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2020-09-10 11:21:04 +0530 |
| commit | c2819e196b3cc1901a4612f72e66da4821966a5e (patch) | |
| tree | 6376e8c559d1c32f780542db0d2be95453e7b6a0 /drivers/soundwire/bus.c | |
| parent | soundwire: bus: filter-out unwanted interrupt reports (diff) | |
| download | linux-dev-c2819e196b3cc1901a4612f72e66da4821966a5e.tar.xz linux-dev-c2819e196b3cc1901a4612f72e66da4821966a5e.zip | |
soundwire: slave: add first_interrupt_done status
Some Slaves report incorrect information in their interrupt status
registers after a master/bus reset, track the initial interrupt
handling so that quirks can be introduced to filter out incorrect
information while keeping interrupts enabled in steady state.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20200908134521.6781-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/bus.c')
| -rw-r--r-- | drivers/soundwire/bus.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 029818b1f568..30b0bed16630 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1472,6 +1472,9 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave) goto io_err; } + /* at this point all initial interrupt sources were handled */ + slave->first_interrupt_done = true; + /* * Read status again to ensure no new interrupts arrived * while servicing interrupts. @@ -1674,8 +1677,10 @@ void sdw_clear_slave_status(struct sdw_bus *bus, u32 request) if (!slave) continue; - if (slave->status != SDW_SLAVE_UNATTACHED) + if (slave->status != SDW_SLAVE_UNATTACHED) { sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED); + slave->first_interrupt_done = false; + } /* keep track of request, used in pm_runtime resume */ slave->unattach_request = request; |