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intel_th: msu: Factor out pipeline draining

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The code that waits for the pipeline empty condition of the MSU is
currently called in the path that disables the trace. We will also
need this in the window switch trigger sequence. Therefore, factor
out this code and make it accessible to the GTH device.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Shishkin
2019-05-03 11:44:46 +03:00
committed by Greg Kroah-Hartman
parent ba39bd8306
commit 8d4155126e
3 changed files with 29 additions and 10 deletions
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7
drivers/hwtracing/intel_th/gth.c
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@@ -469,6 +469,10 @@ static void intel_th_gth_disable(struct intel_th_device *thdev,
struct intel_th_output *output)
{
struct gth_device *gth = dev_get_drvdata(&thdev->dev);
struct intel_th_device *outdev =
container_of(output, struct intel_th_device, output);
struct intel_th_driver *outdrv =
to_intel_th_driver(outdev->dev.driver);
unsigned long count;
int master;
u32 reg;
@@ -492,6 +496,9 @@ static void intel_th_gth_disable(struct intel_th_device *thdev,
cpu_relax();
}
if (outdrv->wait_empty)
outdrv->wait_empty(outdev);
/* clear force capture done for next captures */
iowrite32(0xfc, gth->base + REG_GTH_SCR2);