diff options
| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2017-08-23 09:52:00 +0300 |
|---|---|---|
| committer | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2018-03-28 18:47:21 +0300 |
| commit | 282ffec565c2e9fe18bbb48c19767cccd2437f11 (patch) | |
| tree | 1f18aab2d7194f8f983b96a02f06b9805ac8431b | |
| parent | 661b0df8489a35da4ee8acaaf43f204a913ccfc9 (diff) | |
| download | linux-282ffec565c2e9fe18bbb48c19767cccd2437f11.tar.bz2 | |
intel_th: Allow forcing host mode through drvdata
Some devices can only operate in host mode, so we need means of
communicating this to the core driver on per-device basis. This
adds a flag to drvdata to signal host-only capability to the core.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
| -rw-r--r-- | drivers/hwtracing/intel_th/core.c | 6 | ||||
| -rw-r--r-- | drivers/hwtracing/intel_th/intel_th.h | 4 |
2 files changed, 7 insertions, 3 deletions
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c index 8f820c182240..da962aa2cef5 100644 --- a/drivers/hwtracing/intel_th/core.c +++ b/drivers/hwtracing/intel_th/core.c @@ -630,7 +630,8 @@ intel_th_subdevice_alloc(struct intel_th *th, thdev->output.port = -1; thdev->output.scratchpad = subdev->scrpd; } else if (subdev->type == INTEL_TH_SWITCH) { - thdev->host_mode = host_mode; + thdev->host_mode = + INTEL_TH_CAP(th, host_mode_only) ? true : host_mode; th->hub = thdev; } @@ -729,7 +730,8 @@ static int intel_th_populate(struct intel_th *th) struct intel_th_device *thdev; /* only allow SOURCE and SWITCH devices in host mode */ - if (host_mode && subdev->type == INTEL_TH_OUTPUT) + if ((INTEL_TH_CAP(th, host_mode_only) || host_mode) && + subdev->type == INTEL_TH_OUTPUT) continue; /* diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h index cdeed3b017d0..780206dc9012 100644 --- a/drivers/hwtracing/intel_th/intel_th.h +++ b/drivers/hwtracing/intel_th/intel_th.h @@ -42,9 +42,11 @@ struct intel_th_output { /** * struct intel_th_drvdata - describes hardware capabilities and quirks * @tscu_enable: device needs SW to enable time stamping unit + * @host_mode_only: device can only operate in 'host debugger' mode */ struct intel_th_drvdata { - unsigned int tscu_enable : 1; + unsigned int tscu_enable : 1, + host_mode_only : 1; }; #define INTEL_TH_CAP(_th, _cap) ((_th)->drvdata ? (_th)->drvdata->_cap : 0) |