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author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2018-11-13 10:58:49 +0100 |
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committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2018-11-13 10:59:10 +0100 |
commit | 0ea0397a3a12f9720d6acb78a48da796a54e81aa (patch) | |
tree | e2078363019cb2fde493844d7f25293412c4b6df /drivers/soundwire/intel.c | |
parent | drm/syncobj: Fix compilation following partial revert (diff) | |
parent | Linux 4.20-rc1 (diff) | |
download | linux-dev-0ea0397a3a12f9720d6acb78a48da796a54e81aa.tar.xz linux-dev-0ea0397a3a12f9720d6acb78a48da796a54e81aa.zip |
Merge remote-tracking branch 'drm/drm-next' into drm-misc-next
drm-next is forwarded to v4.20-rc1, and we need this to make
a patch series apply.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'drivers/soundwire/intel.c')
-rw-r--r-- | drivers/soundwire/intel.c | 68 |
1 files changed, 65 insertions, 3 deletions
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 0a8990e758f9..c5ee97ee7886 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -398,6 +398,69 @@ static int intel_config_stream(struct sdw_intel *sdw, } /* + * bank switch routines + */ + +static int intel_pre_bank_switch(struct sdw_bus *bus) +{ + struct sdw_cdns *cdns = bus_to_cdns(bus); + struct sdw_intel *sdw = cdns_to_intel(cdns); + void __iomem *shim = sdw->res->shim; + int sync_reg; + + /* Write to register only for multi-link */ + if (!bus->multi_link) + return 0; + + /* Read SYNC register */ + sync_reg = intel_readl(shim, SDW_SHIM_SYNC); + sync_reg |= SDW_SHIM_SYNC_CMDSYNC << sdw->instance; + intel_writel(shim, SDW_SHIM_SYNC, sync_reg); + + return 0; +} + +static int intel_post_bank_switch(struct sdw_bus *bus) +{ + struct sdw_cdns *cdns = bus_to_cdns(bus); + struct sdw_intel *sdw = cdns_to_intel(cdns); + void __iomem *shim = sdw->res->shim; + int sync_reg, ret; + + /* Write to register only for multi-link */ + if (!bus->multi_link) + return 0; + + /* Read SYNC register */ + sync_reg = intel_readl(shim, SDW_SHIM_SYNC); + + /* + * post_bank_switch() ops is called from the bus in loop for + * all the Masters in the steam with the expectation that + * we trigger the bankswitch for the only first Master in the list + * and do nothing for the other Masters + * + * So, set the SYNCGO bit only if CMDSYNC bit is set for any Master. + */ + if (!(sync_reg & SDW_SHIM_SYNC_CMDSYNC_MASK)) + return 0; + + /* + * Set SyncGO bit to synchronously trigger a bank switch for + * all the masters. A write to SYNCGO bit clears CMDSYNC bit for all + * the Masters. + */ + sync_reg |= SDW_SHIM_SYNC_SYNCGO; + + ret = intel_clear_bit(shim, SDW_SHIM_SYNC, sync_reg, + SDW_SHIM_SYNC_SYNCGO); + if (ret < 0) + dev_err(sdw->cdns.dev, "Post bank switch failed: %d", ret); + + return ret; +} + +/* * DAI routines */ @@ -750,6 +813,8 @@ static struct sdw_master_ops sdw_intel_ops = { .xfer_msg_defer = cdns_xfer_msg_defer, .reset_page_addr = cdns_reset_page_addr, .set_bus_conf = cdns_bus_conf, + .pre_bank_switch = intel_pre_bank_switch, + .post_bank_switch = intel_post_bank_switch, }; /* @@ -780,9 +845,6 @@ static int intel_probe(struct platform_device *pdev) sdw_intel_ops.read_prop = intel_prop_read; sdw->cdns.bus.ops = &sdw_intel_ops; - sdw_intel_ops.read_prop = intel_prop_read; - sdw->cdns.bus.ops = &sdw_intel_ops; - platform_set_drvdata(pdev, sdw); ret = sdw_add_bus_master(&sdw->cdns.bus); |