diff options
| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2021-06-21 18:12:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-24 16:49:32 +0300 |
| commit | ab1afed701d2db7eb35c1a2526a29067a38e93d1 (patch) | |
| tree | 0888e6550d12eed8e6d115ecb4c331c74c259905 /drivers/hwtracing/intel_th/intel_th.h | |
| parent | 02ca71effb96595fb7e0a17df1aaedc5d2e30747 (diff) | |
| download | linux-ab1afed701d2db7eb35c1a2526a29067a38e93d1.tar.xz | |
intel_th: Wait until port is in reset before programming it
Some devices don't drain their pipelines if we don't make sure that
the corresponding output port is in reset before programming it for
a new trace capture, resulting in bits of old trace appearing in the
new trace capture. Fix that by explicitly making sure the reset is
asserted before programming new trace capture.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Link: https://lore.kernel.org/r/20210621151246.31891-5-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/intel_th/intel_th.h')
| -rw-r--r-- | drivers/hwtracing/intel_th/intel_th.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h index 89c67e0e1d34..0ffb42990175 100644 --- a/drivers/hwtracing/intel_th/intel_th.h +++ b/drivers/hwtracing/intel_th/intel_th.h @@ -143,6 +143,7 @@ intel_th_output_assigned(struct intel_th_device *thdev) * @remove: remove method * @assign: match a given output type device against available outputs * @unassign: deassociate an output type device from an output port + * @prepare: prepare output port for tracing * @enable: enable tracing for a given output device * @disable: disable tracing for a given output device * @irq: interrupt callback @@ -164,6 +165,8 @@ struct intel_th_driver { struct intel_th_device *othdev); void (*unassign)(struct intel_th_device *thdev, struct intel_th_device *othdev); + void (*prepare)(struct intel_th_device *thdev, + struct intel_th_output *output); void (*enable)(struct intel_th_device *thdev, struct intel_th_output *output); void (*trig_switch)(struct intel_th_device *thdev, |