Re: [igt-dev] [v2] tests/kms_scaling_modes: New IGT to validate scaling modes

["Modem, Bhanuprakash" <bhanuprakash.modem@intel.com>]

On Sat-22-01-2022 01:06 am, Swati Sharma wrote:
> In this IGT, various scaling modes are validated. Scaling
> mode is one of the connector properties. This property
> defines how a non-native mode is upscaled to the native
> mode of an LCD panel.
> 
> There are 4 types of scaling modes defined:
> 	None:
> 		No upscaling happens, scaling is left to the panel. Not all
> 		drivers expose this mode.
> 	Full:
> 		The output is upscaled to the full resolution of the panel,
> 		ignoring the aspect ratio. It will expand current image to
> 		the size of the monitor.
> 	Center:
> 		No upscaling happens, the output is centered within the native
> 		resolution the panel. As a result, black bars may appear
> 		around the image.
> 	Full aspect:
> 		The output is upscaled to maximize either the width or height
> 		while retaining the aspect ratio. It will fill the screen w/o
> 		stretching the image. Black bars are placed either on top
> 		and bottom or left and right of the picture.
> 
> v2: -removed test flags/test_cycle_flags() (JP)
>      -removed redundant igt_display_commit_atomic() (JP)
>      -corrected indentation (JP)
> 
> Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
> ---
>   tests/kms_scaling_modes.c | 144 ++++++++++++++++++++++++++++++++++++++
>   tests/meson.build         |   1 +
>   2 files changed, 145 insertions(+)
>   create mode 100644 tests/kms_scaling_modes.c
> 
> diff --git a/tests/kms_scaling_modes.c b/tests/kms_scaling_modes.c
> new file mode 100644
> index 00000000..28b5801a
> --- /dev/null
> +++ b/tests/kms_scaling_modes.c
> @@ -0,0 +1,144 @@
> +/*
> + * Copyright © 2022 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
> + *
> + * Author:
> + *     Swati Sharma <swati2.sharma@intel.com>
> + */
> +
> +#include "igt.h"
> +#include <fcntl.h>
> +#include <termios.h>
> +#include <unistd.h>
> +
> +IGT_TEST_DESCRIPTION("Test display scaling modes");
> +
> +/* Common test data */
> +typedef struct data {
> +	igt_display_t display;
> +	int drm_fd;
> +} data_t;
> +
> +static void test_scaling_mode_on_output(igt_display_t *display, const enum pipe pipe,
> +					igt_output_t *output, uint32_t flags)
> +{
> +	igt_plane_t *primary, *sprite;
> +	drmModeModeInfo mode;
> +	struct igt_fb red, blue;
> +	int ret;
> +
> +	igt_output_set_pipe(output, pipe);
> +	mode = *igt_output_get_mode(output);
> +
> +	primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
> +	sprite = igt_output_get_plane_type(output, DRM_PLANE_TYPE_OVERLAY);
> +
> +	igt_create_color_fb(display->drm_fd, mode.hdisplay, mode.vdisplay,
> +			    DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
> +			    0.f, 0.f, 1.f, &blue);
> +
> +	igt_create_color_fb(display->drm_fd, 640, 480,
> +			    DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
> +			    1.f, 0.f, 0.f, &red);
> +
> +	igt_plane_set_fb(primary, &blue);
> +	igt_plane_set_fb(sprite, &red);
> +
> +	igt_display_commit2(display, COMMIT_ATOMIC);
> +
> +	mode.hdisplay = 640;
> +	mode.vdisplay = 480;
> +	igt_output_override_mode(output, &mode);
> +
> +	igt_plane_set_fb(sprite, NULL);
> +	igt_plane_set_fb(primary, &red);
> +
> +	igt_output_set_prop_value(output, IGT_CONNECTOR_SCALING_MODE, flags);
> +
> +	/* Don't pass ALLOW_MODESET with overridden mode, force fastset */
> +	ret = igt_display_try_commit_atomic(display, 0, NULL);
> +
> +	if (ret == -EINVAL)
> +		igt_skip_on_f(ret == -EINVAL, "Scaling mode not supported\n");
> +
> +	igt_remove_fb(display->drm_fd, &red);
> +	igt_remove_fb(display->drm_fd, &blue);
> +}
> +
> +/* Returns true if an output supports scaling mode property */
> +static bool has_scaling_mode(igt_output_t *output)
> +{
> +	return igt_output_has_prop(output, IGT_CONNECTOR_SCALING_MODE) &&
> +	       igt_output_get_prop(output, IGT_CONNECTOR_SCALING_MODE);
> +}
> +
> +static void test_scaling_mode(data_t *data, uint32_t flags)
> +{
> +	igt_display_t *display = &data->display;
> +	igt_output_t *output;
> +	enum pipe pipe;
> +	int valid_tests = 0;
> +
> +	for_each_pipe_with_valid_output(display, pipe, output) {
> +		if (!has_scaling_mode(output))
> +			continue;
> +
> +		igt_dynamic_f("%s-pipe-%s", output->name, kmstest_pipe_name(pipe));
> +		igt_display_reset(display);
> +		test_scaling_mode_on_output(display, pipe, output, flags);
> +		valid_tests++;
> +	}
> +
> +	igt_require_f(valid_tests, "No valid crtc/connector combinations found\n");

This check is not required. igt_subtest_with_dynamic() will throw a SKIP 
automatically if no igt_dynamic() is executed.

- Bhanu

> +}
> +
> +igt_main
> +{
> +	data_t data = {};
> +
> +	igt_fixture {
> +		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
> +		igt_require(data.drm_fd >= 0);
> +
> +		kmstest_set_vt_graphics_mode();
> +
> +		igt_display_require(&data.display, data.drm_fd);
> +		igt_require(data.display.is_atomic);
> +
> +		igt_display_require_output(&data.display);
> +	}
> +
> +	igt_describe("Tests full display scaling mode");
> +	igt_subtest_with_dynamic("scaling-mode-full")
> +		test_scaling_mode(&data, DRM_MODE_SCALE_FULLSCREEN);
> +	igt_describe("Tests center display scaling mode");
> +	igt_subtest_with_dynamic("scaling-mode-center")
> +		test_scaling_mode(&data, DRM_MODE_SCALE_CENTER);
> +	igt_describe("Tests full aspect display scaling mode");
> +	igt_subtest_with_dynamic("scaling-mode-full-aspect")
> +		test_scaling_mode(&data, DRM_MODE_SCALE_ASPECT);
> +	igt_describe("Tests none display scaling mode (no scaling)");
> +	igt_subtest_with_dynamic("scaling-mode-none")
> +		test_scaling_mode(&data, DRM_MODE_SCALE_NONE);
> +
> +	igt_fixture
> +		igt_display_fini(&data.display);
> +}
> diff --git a/tests/meson.build b/tests/meson.build
> index c14acf99..7003d064 100644
> --- a/tests/meson.build
> +++ b/tests/meson.build
> @@ -50,6 +50,7 @@ test_progs = [
>   	'kms_properties',
>   	'kms_rmfb',
>   	'kms_rotation_crc',
> +	'kms_scaling_modes',
>   	'kms_selftest',
>   	'kms_sequence',
>   	'kms_setmode',