[igt-dev] [PATCH i-g-t 2/8] tests/i915/i915_pm_dc: Added new test to verify Display C States

Petri Latvala petri.latvala at intel.com
Tue Sep 17 11:40:46 UTC 2019


On Thu, Sep 12, 2019 at 01:46:32PM +0530, Jeevan B wrote:
> From: Jyoti Yadav <jyoti.r.yadav at intel.com>
> 
> Currently this test validates DC5 upon PSR entry for supported platforms.
> Added new file for compilation inside Makefile and Meson.
> 
> v2: Used the debugfs entry for DC counters instead of Registers.
>     Used shorter names for variables.
>     Introduced timeout to read DC counters.
> v3: one second timeout is introduced to read DC counters.
>     Skip the subtest if counters are not available for that platform.
> v4: Rebased, to fix compilation error in psr_enable(), psr_wait_entry()
>     and replaced igt_display_init() by igt_display_require() in pm_rpm.c.
>     Addressed the review comment by removing unused function display_init,
>     removing redundant igt commit suggested by Imre.
>     Fixed typo in read_dc_counter().
> v5: Addressed the review comment by removing redundant read_dc_counter(),
>     clubbed cleanup() function in test_dc_state_psr() suggested by Imre.
>     Rearranged  preprocessor directives at one place.
>     Fixed compilation warning by adding function prototype for
>     dc_state_wait_entry() and check_dc_counter().
>     Listing actual change in patch set changelog to make review easier.
> v6: Fixed "i915_edp_psr_status" string to "Sink support: yes".
> v7: Rebased since test name changed from "pm_dc" to "i915_pm_dc",
>     this will align with other PM tests.
>     also changed the DC5/6 counter check timeout to 3 second.
> v8: On few platform SATA i/p is blocking deeper package C states.
>     used igt_pm_enable_sata_link_power_management() function in order
>     to use min_power policy.
> v9: Removed redundant igt_pm_remove_sata_link_power_management()
>     as sata link policy values will be restored by exit handler.
> v10: changed cleanup() to cleanup_dc_psr() symmetric to cleanup_dc_dpms().
> v11: Removed unwanted headers. [Imre]
> 
> Signed-off-by: Jyoti Yadav <jyoti.r.yadav at intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> ---
>  tests/Makefile.sources  |   3 +
>  tests/i915/i915_pm_dc.c | 211 ++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/meson.build       |   1 +
>  3 files changed, 215 insertions(+)
>  create mode 100644 tests/i915/i915_pm_dc.c
> 
> diff --git a/tests/Makefile.sources b/tests/Makefile.sources
> index 549a350..06a0a48 100644
> --- a/tests/Makefile.sources
> +++ b/tests/Makefile.sources
> @@ -520,6 +520,9 @@ i915_pm_rc6_residency_SOURCES = i915/i915_pm_rc6_residency.c
>  TESTS_progs += i915_pm_rpm
>  i915_pm_rpm_SOURCES = i915/i915_pm_rpm.c
>  
> +TESTS_progs += i915_pm_dc
> +i915_pm_dc_SOURCES = i915/i915_pm_dc.c
> +
>  TESTS_progs += i915_pm_rps
>  i915_pm_rps_SOURCES = i915/i915_pm_rps.c
>  
> diff --git a/tests/i915/i915_pm_dc.c b/tests/i915/i915_pm_dc.c
> new file mode 100644
> index 0000000..c0e41c3
> --- /dev/null
> +++ b/tests/i915/i915_pm_dc.c
> @@ -0,0 +1,211 @@
> +/*
> + * 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 <errno.h>
> +#include <stdbool.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include "igt.h"
> +#include "igt_psr.h"
> +#include "igt_sysfs.h"
> +#include "limits.h"
> +
> +/* DC State Flags */
> +#define CHECK_DC5	1
> +#define CHECK_DC6	2
> +
> +typedef struct {
> +	int drm_fd;
> +	int debugfs_fd;
> +	uint32_t devid;
> +	igt_display_t display;
> +	struct igt_fb fb_white;
> +	enum psr_mode op_psr_mode;
> +	drmModeModeInfo *mode;
> +	igt_output_t *output;
> +} data_t;
> +
> +static bool dc_state_wait_entry(int drm_fd, int dc_flag, int prev_dc_count);
> +static void check_dc_counter(int drm_fd, int dc_flag, uint32_t prev_dc_count);
> +
> +static void setup_output(data_t *data)
> +{
> +	igt_display_t *display = &data->display;
> +	igt_output_t *output;
> +	enum pipe pipe;
> +
> +	for_each_pipe_with_valid_output(display, pipe, output) {
> +		drmModeConnectorPtr c = output->config.connector;
> +
> +		if (c->connector_type != DRM_MODE_CONNECTOR_eDP)
> +			continue;
> +
> +		igt_output_set_pipe(output, pipe);
> +		data->output = output;
> +		data->mode = igt_output_get_mode(output);
> +
> +		return;
> +	}
> +}
> +
> +static void display_fini(data_t *data)
> +{
> +	igt_display_fini(&data->display);
> +}
> +
> +static bool edp_psr_sink_support(data_t *data)
> +{
> +	char buf[512];
> +
> +	igt_debugfs_simple_read(data->debugfs_fd, "i915_edp_psr_status",
> +				buf, sizeof(buf));
> +
> +	return strstr(buf, "Sink support: yes");
> +}
> +
> +static void cleanup_dc_psr(data_t *data)
> +{
> +	igt_plane_t *primary;
> +
> +	primary = igt_output_get_plane_type(data->output,
> +					    DRM_PLANE_TYPE_PRIMARY);
> +	igt_plane_set_fb(primary, NULL);
> +	igt_display_commit(&data->display);
> +	igt_remove_fb(data->drm_fd, &data->fb_white);
> +}
> +
> +static void setup_primary(data_t *data)
> +{
> +	igt_plane_t *primary;
> +
> +	primary = igt_output_get_plane_type(data->output,
> +					    DRM_PLANE_TYPE_PRIMARY);
> +	igt_plane_set_fb(primary, NULL);
> +	igt_create_color_fb(data->drm_fd,
> +			    data->mode->hdisplay, data->mode->vdisplay,
> +			    DRM_FORMAT_XRGB8888,
> +			    LOCAL_I915_FORMAT_MOD_X_TILED,
> +			    1.0, 1.0, 1.0,
> +			    &data->fb_white);
> +	igt_plane_set_fb(primary, &data->fb_white);
> +	igt_display_commit(&data->display);
> +}
> +
> +static uint32_t get_dc_counter(char *dc_data)
> +{
> +	char *e;
> +	long ret;
> +	char *s = strchr(dc_data, ':');
> +
> +	assert(s);
> +	s++;
> +	ret = strtol(s, &e, 10);
> +	assert(((ret != LONG_MIN && ret != LONG_MAX) || errno != ERANGE) &&
> +	       e > s && *e == '\n' && ret >= 0);
> +	return ret;
> +}
> +
> +static uint32_t read_dc_counter(uint32_t drm_fd, int dc_flag)
> +{
> +	char buf[4096];
> +	char *str;
> +
> +	igt_debugfs_read(drm_fd, "i915_dmc_info", buf);
> +
> +	if (dc_flag & CHECK_DC5)
> +		str = strstr(buf, "DC3 -> DC5 count");
> +	else if (dc_flag & CHECK_DC6)
> +		str = strstr(buf, "DC5 -> DC6 count");
> +
> +	/* Check DC5/DC6 counter is available for the platform.
> +	 * Skip the test if counter is not available.
> +	 */
> +	igt_skip_on_f(!str, "DC%d counter is not available\n",
> +		      dc_flag & CHECK_DC5 ? 5 : 6);
> +	return get_dc_counter(str);
> +}
> +
> +static bool dc_state_wait_entry(int drm_fd, int dc_flag, int prev_dc_count)
> +{
> +	return igt_wait(read_dc_counter(drm_fd, dc_flag) >
> +			prev_dc_count, 3000, 100);
> +}
> +
> +static void check_dc_counter(int drm_fd, int dc_flag, uint32_t prev_dc_count)
> +{
> +	igt_assert_f(dc_state_wait_entry(drm_fd, dc_flag, prev_dc_count),
> +		     "DC%d state is not achieved\n",
> +		     dc_flag & CHECK_DC5 ? 5 : 6);
> +}
> +
> +static void test_dc_state_psr(data_t *data, int dc_flag)
> +{
> +	uint32_t dc_counter_before_psr;
> +
> +	dc_counter_before_psr = read_dc_counter(data->drm_fd, dc_flag);
> +	setup_output(data);
> +	setup_primary(data);
> +	igt_assert(psr_wait_entry(data->debugfs_fd, data->op_psr_mode));
> +	check_dc_counter(data->drm_fd, dc_flag, dc_counter_before_psr);
> +	cleanup_dc_psr(data);
> +}
> +
> +IGT_TEST_DESCRIPTION("Display Power DC states IGT Test");
> +int main(int argc, char *argv[])
> +{
> +	bool has_runtime_pm;
> +	data_t data = {};
> +
> +	igt_skip_on_simulation();
> +	igt_subtest_init(argc, argv);
> +	igt_fixture {
> +		data.drm_fd = drm_open_driver_master(DRIVER_INTEL);
> +		data.debugfs_fd = igt_debugfs_dir(data.drm_fd);
> +		igt_require(data.debugfs_fd != -1);
> +		kmstest_set_vt_graphics_mode();
> +		data.devid = intel_get_drm_devid(data.drm_fd);
> +		igt_pm_enable_sata_link_power_management();
> +		has_runtime_pm = igt_setup_runtime_pm();
> +		igt_info("Runtime PM support: %d\n", has_runtime_pm);
> +		igt_require(has_runtime_pm);
> +		igt_require(igt_pm_dmc_loaded(data.debugfs_fd));
> +		igt_display_require(&data.display, data.drm_fd);
> +	}
> +
> +	igt_describe("DC5 igt test with PSR Sleep state");
> +	igt_subtest("dc5-psr") {


Can the documentation be fleshed out a bit more? For one, it's
redundant for an IGT test to state that it's an IGT test (applies to
both the igt_describe calls and the IGT_TEST_DESCRIPTION string).

"DC5 test with PSR Sleep state" is not clear what the test is
testing. Something like "Test that DC5 state is reached in PSR sleep
state"?


-- 
Petri Latvala


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