Re: [PATCH i-g-t v4 2/5] tests/pm_dc: Added new test to verify Display C States

Imre Deak
2019-02-08T14:49:35Z

On Fri, Feb 01, 2019 at 09:42:59PM +0530, Anshuman Gupta wrote:
> From: Jyoti Yadav <jyoti.r.yadav@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, addressed the review comment and spell correction.
>
> Signed-off-by: Jyoti Yadav <jyoti.r.yadav@intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
> ---
> tests/Makefile.sources | 1 +
> tests/meson.build | 1 +
> tests/pm_dc.c | 205 +++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 207 insertions(+)
> create mode 100644 tests/pm_dc.c
>
> diff --git a/tests/Makefile.sources b/tests/Makefile.sources
> index 34b7e44..07b9787 100644
> --- a/tests/Makefile.sources
> +++ b/tests/Makefile.sources
> @@ -80,6 +80,7 @@ TESTS_progs = \
> pm_lpsp \
> pm_rc6_residency \
> pm_rpm \
> + pm_dc \
> pm_rps \
> pm_sseu \
> prime_busy \
> diff --git a/tests/meson.build b/tests/meson.build
> index 25b4614..3070a3e 100644
> --- a/tests/meson.build
> +++ b/tests/meson.build
> @@ -66,6 +66,7 @@ test_progs = [
> 'pm_lpsp',
> 'pm_rc6_residency',
> 'pm_rpm',
> + 'pm_dc',
> 'pm_rps',
> 'pm_sseu',
> 'prime_busy',
> diff --git a/tests/pm_dc.c b/tests/pm_dc.c
> new file mode 100644
> index 0000000..d59be94
> --- /dev/null
> +++ b/tests/pm_dc.c
> @@ -0,0 +1,205 @@
> +/*
> + * 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 "igt.h"
> +#include "igt_sysfs.h"
> +#include "igt_psr.h"
> +#include <errno.h>
> +#include <stdbool.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include "intel_bufmgr.h"
> +#include "intel_io.h"
> +#include "limits.h"
> +
> +
> +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;
> +
> +/* DC State Flags */
> +#define CHECK_DC5 1
> +#define CHECK_DC6 2
> +
> +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\n");
> +}
> +
> +static void cleanup(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");
> + igt_skip_on_f(str == NULL, "DC%d counter is not available\n",
> + dc_flag & CHECK_DC5 ? 5 : 6);
> + return get_dc_counter(str);
> +}
> +
> +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, 1000, 100);
> +}
> +
> +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);
> +}
> +
> +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);
> + 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_subtest("dc5-psr") {
> + data.op_psr_mode = PSR_MODE_1;
> + psr_enable(data.debugfs_fd, data.op_psr_mode);
> + igt_require_f(edp_psr_sink_support(&data),
> + "Sink does not support PSR\n");
> + /* Check DC5 counter is available for the platform.
> + * Skip the test if counter is not available.
> + */
> + read_dc_counter(data.drm_fd, CHECK_DC5);
> + test_dc_state_psr(&data, CHECK_DC5);
> + cleanup(&data);

Why isn't cleanup paired with the corresponding setup func where setup
is called from? Also looks like the read_dc_counter() call could be part
of the test function.

> + }
> + igt_fixture {
> + close(data.debugfs_fd);
> + display_fini(&data);
> + }
> +
> + igt_exit();
> +}
> --
> 2.7.4
>