Re: [PATCH 5/5] tests: Test suspend/resume on active pipelines

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Kieran,

Thank you for the patch.

On Friday 25 Nov 2016 13:59:16 Kieran Bingham wrote:
> From: Kieran Bingham <kieran.bingham@ideasonboard.com>
> 
> Provide a test to verify the hardware completes a functional test whilst
> performing a suspend resume cycle in parallel. Make use of the
> /sys/power/pm_test functionality provided by CONFIG_PM_DEBUG to perform
> the testing
> 
> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
> ---
>  tests/vsp-unit-test-0020.sh | 86 ++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 86 insertions(+)
>  create mode 100755 tests/vsp-unit-test-0020.sh
> 
> diff --git a/tests/vsp-unit-test-0020.sh b/tests/vsp-unit-test-0020.sh
> new file mode 100755
> index 000000000000..5838295139b2
> --- /dev/null
> +++ b/tests/vsp-unit-test-0020.sh
> @@ -0,0 +1,86 @@
> +#!/bin/sh
> +
> +#
> +# Test power-management suspend/resume whilst pipelines are active
> +#
> +# Utilise the basic RPF->WPF packing test case as a measure that the
> hardware
> +# is operable while we perform test suspend and resume, and verify that it
> is
> +# still successful even with a suspend resume cycle in the middle of the
> test.
> +#
> +# Format iteration loops are maintained, even with only one format so that
> this
> +# test can be easily extended to try further formats if needed in the
> future.
> +#

Given that this test will suspend during the first iteration only I don't 
think it's very useful to keep the loop.

> +
> +source vsp-lib.sh
> +
> +features="rpf.0 wpf.0"
> +formats="RGB24"
> +
> +# These can be extracted from /sys/power/pm_test
> +suspend_modes="freezer devices platform processors core"

How about extracting them from that file then ? :-) Or maybe just verifying 
they are available before trying to use them ?

> +# This extended function performs the same
> +# as it's non-extended name-sake - but runs the pipeline
> +# for 300 frames. The suspend action occurs between frame #150~#200
> +test_extended_wpf_packing() {
> +	test_start "Verify WPF packing in $format during suspend:$mode"
> +
> +	pipe_configure rpf-wpf 0 0
> +	format_configure rpf-wpf 0 0 ARGB32 1024x768 $format
> +
> +	vsp_runner rpf.0 --count=300 &
> +	vsp_runner wpf.0 --count=300 --skip=297
> +
> +	local result=$(compare_frames)
> +
> +	test_complete $result
> +}
> +
> +test_hw_pipe() {
> +	local format
> +
> +	for format in $formats ; do
> +		test_extended_wpf_packing $format
> +	done
> +}
> +
> +test_suspend_resume() {
> +	local test_results=0

This variable doesn't seem to be used.

> +	local test_pid
> +
> +	# Test the hardware each side of suspend resume
> +	test_hw_pipe &
> +	test_pid=$!
> +
> +	# Make sure the pipeline has time to start
> +	sleep 1
> +
> +	# Set the test mode
> +	echo $mode > /sys/power/pm_test
> +
> +	# Comence suspend

Commence ?

> +	# The pm_test framework will automatically resume after 5 seconds
> +	echo mem > /sys/power/state
> +
> +	# Wait for the pipeline to complete
> +	wait $test_pid

It would be nice to add a timeout here. Maybe something like the following 
(untested) ?

	(sleep 30 ; kill $test_pid) &
	kill_pid=$!
	wait $test_pid
	kill $kill_pid

test_complete should be called here based on both whether the frames compared 
successfully and whether the test timed out.

> +}
> +
> +test_main() {
> +	local mode;

No need for the trailing ;.

> +	local suspend_test_failures

This variable doesn't seem to be used.

> +
> +	# Check for pm-suspend test option
> +	if [ ! -e /sys/power/pm_test ] ; then
> +		echo "$0: Suspend Resume testing requires CONFIG_PM_DEBUG"
> +		test_complete skip
> +		return
> +	fi;
> +
> +	for mode in $suspend_modes ; do
> +		test_suspend_resume $mode
> +	done;
> +}
> +
> +test_init $0 "$features"
> +test_run

-- 
Regards,

Laurent Pinchart