Re: [igt-dev] [PATCH RFC i-g-t] tests/kms_atomic_multi: new test

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Thu, Sep 05, 2019 at 05:35:30PM +0300, Simon Ser wrote:
> This test performs a single atomic commit on multiple CRTCs at once. The goal
> is to check that a page-flip event for each CRTC is received.
> 
> I chose not to integrate this to an existing test, because kms_atomic is
> basically a single function with lots of options. Integrating this test to
> kms_atomic would mix up these two and make it difficult to understand the test.
> 
> Signed-off-by: Simon Ser <simon.ser@intel.com>
> ---
> 
> This is basically the test I wrote while reviewing the kms_dp_tiled_display
> series [1]. I'm sending it as an RFC to know if there's any interest in having
> it merged.
> 
> [1]: https://lists.freedesktop.org/archives/igt-dev/2019-August/015724.html
> 
>  tests/Makefile.sources   |   1 +
>  tests/kms_atomic_multi.c | 149 +++++++++++++++++++++++++++++++++++++++
>  tests/meson.build        |   1 +
>  3 files changed, 151 insertions(+)
>  create mode 100644 tests/kms_atomic_multi.c
> 
> diff --git a/tests/Makefile.sources b/tests/Makefile.sources
> index c02e4d9489f2..e08968d2b0fc 100644
> --- a/tests/Makefile.sources
> +++ b/tests/Makefile.sources
> @@ -29,6 +29,7 @@ TESTS_progs = \
>  	kms_atomic \
>  	kms_atomic_interruptible \
>  	kms_atomic_transition \
> +	kms_atomic_multi \
>  	kms_available_modes_crc \
>  	kms_big_fb \
>  	kms_busy \
> diff --git a/tests/kms_atomic_multi.c b/tests/kms_atomic_multi.c
> new file mode 100644
> index 000000000000..96212ab9a1e6
> --- /dev/null
> +++ b/tests/kms_atomic_multi.c
> @@ -0,0 +1,149 @@
> +/*
> + * Copyright © 2018 Intel Corporation
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
> + * IN THE SOFTWARE.
> + */
> +
> +#include <poll.h>
> +#include <drm_mode.h>
> +#include <drm_fourcc.h>
> +#include "igt.h"
> +
> +struct test_connector {
> +	igt_output_t *output;
> +	struct igt_fb fb;
> +	drmModeConnectorPtr connector;
> +	enum pipe pipe;
> +	bool page_flip;
> +};
> +
> +struct test_data {
> +	int drm_fd;
> +	igt_display_t *display;
> +	struct test_connector conns[2];
> +};
> +
> +static void create_fb(struct test_data *data, struct test_connector *conn)
> +{
> +	igt_plane_t *primary;
> +	drmModeModeInfo *mode;
> +
> +	mode = igt_output_get_mode(conn->output);
> +	igt_create_pattern_fb(data->drm_fd, mode->hdisplay, mode->vdisplay,
> +			      DRM_FORMAT_XBGR8888, LOCAL_DRM_FORMAT_MOD_NONE,
> +			      &conn->fb);
> +
> +	primary = igt_output_get_plane_type(conn->output, DRM_PLANE_TYPE_PRIMARY);
> +	igt_assert(primary);
> +
> +	igt_plane_set_fb(primary, &conn->fb);
> +}
> +
> +static void pick_2_outputs(struct test_data *data)
> +{
> +	igt_output_t *output;
> +	struct test_connector *conn;
> +	size_t i;
> +
> +	i = 0;
> +	for_each_connected_output(data->display, output) {
> +		if (i >= 2)
> +			break;
> +
> +		conn = &data->conns[i];
> +		conn->output = output;
> +		conn->pipe = i;

That assumes every output can be driven by any pipe.
Using for_each_valid_output_on_pipe() should avoid that
assumption.

> +		igt_output_set_pipe(output, conn->pipe);
> +		i++;
> +	}
> +
> +	igt_skip_on(i < 2);
> +	/* TODO: test_only commit, skip on failure */
> +	igt_display_commit_atomic(data->display, DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
> +}
> +
> +static void page_flip_handler(int fd, unsigned seq, unsigned tv_sec,
> +			      unsigned tv_usec, unsigned crtc_id, void *_data)
> +{
> +	struct test_data *data = _data;
> +	struct test_connector *conn;
> +	size_t i;
> +
> +	for (i = 0; i < sizeof(data->conns) / sizeof(data->conns[0]); i++) {

ARRAY_SIZE()

> +		conn = &data->conns[i];
> +		if (data->display->pipes[conn->pipe].crtc_id == crtc_id) {
> +			igt_assert_f(!conn->page_flip,
> +				     "Got two page-flips for CRTC %u\n",
> +				     crtc_id);
> +			conn->page_flip = true;
> +			return;
> +		}
> +	}
> +
> +	igt_assert_f(0, "Got page-flip event for unexpected CRTC %u\n", crtc_id);
> +}
> +
> +igt_main
> +{
> +	int ret;
> +	struct test_data data = {0};
> +	igt_display_t display;
> +	struct pollfd pfd = {0};
> +	drmEventContext drm_event = {0};
> +	int i;
> +
> +	igt_fixture {
> +		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
> +		kmstest_set_vt_graphics_mode();
> +		igt_display_require(&display, data.drm_fd);
> +		igt_display_reset(&display);
> +		igt_require(display.is_atomic);
> +		data.display = &display;
> +
> +		pfd.fd = data.drm_fd;
> +		pfd.events = POLLIN;
> +
> +		drm_event.version = 3;
> +		drm_event.page_flip_handler2 = page_flip_handler;
> +	}
> +
> +	igt_subtest("2x-flip") {

Are we planning more subtests? I guess 1x,2x,3x,... might be nice?

> +		pick_2_outputs(&data);
> +
> +		create_fb(&data, &data.conns[0]);
> +		create_fb(&data, &data.conns[1]);
> +
> +		igt_display_commit_atomic(data.display, DRM_MODE_ATOMIC_NONBLOCK |
> +					  DRM_MODE_PAGE_FLIP_EVENT, &data);
> +
> +		/* TODO: handle two events sent at once */
> +		for (i = 0; i < 2; i++) {
> +			ret = poll(&pfd, 1, 1000);
> +			igt_assert(ret == 1);
> +			drmHandleEvent(data.drm_fd, &drm_event);

Not verifying that we didn't get too many events?

I guess it might also be nice to have different subtests
for page flips and full modesets.

I guess there is no generic way to force the kernel to modeset
a crtc we didn't explicitly include in the request, so can't
really test that scenario :(

> +		}
> +	}
> +
> +	igt_fixture {
> +		close(data.drm_fd);
> +		kmstest_restore_vt_mode();
> +		igt_display_fini(data.display);
> +	}
> +}
> diff --git a/tests/meson.build b/tests/meson.build
> index a7b2b3221304..df00ab4a2f81 100644
> --- a/tests/meson.build
> +++ b/tests/meson.build
> @@ -14,6 +14,7 @@ test_progs = [
>  	'kms_atomic',
>  	'kms_atomic_interruptible',
>  	'kms_atomic_transition',
> +	'kms_atomic_multi',
>  	'kms_available_modes_crc',
>  	'kms_big_fb',
>  	'kms_busy',
> --
> 2.23.0
> 
> _______________________________________________
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> https://lists.freedesktop.org/mailman/listinfo/igt-dev

-- 
Ville Syrjälä
Intel
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