From: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
QA has asked me "How can we make sure LPSP is working?". Now, instead
of writing big paragraphs, I can just answer "make sure pm_lpsp
works".
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
---
tests/.gitignore | 1 +
tests/Makefile.sources | 1 +
tests/pm_lpsp.c | 275 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 277 insertions(+)
create mode 100644 tests/pm_lpsp.c
diff --git a/tests/.gitignore b/tests/.gitignore
index 1bab1cb..6086e9c 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -108,6 +108,7 @@ kms_flip
kms_pipe_crc_basic
kms_render
kms_setmode
+pm_lpsp
pm_pc8
pm_psr
pm_rc6_residency
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index d201809..808bf35 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -54,6 +54,7 @@ TESTS_progs_M = \
kms_pipe_crc_basic \
kms_render \
kms_setmode \
+ pm_lpsp \
pm_pc8 \
prime_self_import \
template \
diff --git a/tests/pm_lpsp.c b/tests/pm_lpsp.c
new file mode 100644
index 0000000..492efe1
--- /dev/null
+++ b/tests/pm_lpsp.c
@@ -0,0 +1,275 @@
+/*
+ * Copyright © 2013 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.
+ *
+ * Author: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "drmtest.h"
+#include "igt_kms.h"
+
+/* We know that if we don't enable audio runtime PM, snd_hda_intel will never
+ * release its power well refcount, and we'll never reach the LPSP sate. OTOH
+ * there's no guarantee that it will release the power well if we enable runtime
+ * PM, but at least we can try. We don't have any assertions since the user may
+ * not even have snd_hda_intel loaded, which is not a problem. */
+static void disable_audio_runtime_pm(void)
+{
+ int fd;
+
+ fd = open("/sys/module/snd_hda_intel/parameters/power_save", O_WRONLY);
+ if (fd >= 0) {
+ write(fd, "1\n", 2);
+ close(fd);
+ }
+ fd = open("/sys/bus/pci/devices/0000:00:03.0/power/control", O_WRONLY);
+ if (fd >= 0) {
+ write(fd, "auto\n", 5);
+ close(fd);
+ }
+ /* Give some time for it to react. */
+ sleep(1);
+}
+
+static bool supports_lpsp(uint32_t devid)
+{
+ return IS_HASWELL(devid) || IS_BROADWELL(devid);
+}
+
+static bool lpsp_is_enabled(int drm_fd)
+{
+ uint32_t val;
+
+ val = INREG(HSW_PWR_WELL_CTL2);
+ return !(val & HSW_PWR_WELL_STATE_ENABLED);
+}
+
+static void disable_all_screens(int drm_fd, drmModeResPtr drm_resources)
+{
+ int i, rc;
+
+ for (i = 0; i < drm_resources->count_crtcs; i++) {
+ rc = drmModeSetCrtc(drm_fd, drm_resources->crtcs[i], -1, 0, 0,
+ NULL, 0, NULL);
+ igt_assert(rc == 0);
+ }
+}
+
+/* The LPSP mode is all about an enabled pipe, but we expect to also be in the
+ * low power mode when no pipes are enabled, so do this check anyway. */
+static void screens_disabled_subtest(int drm_fd, drmModeResPtr drm_res)
+{
+ disable_all_screens(drm_fd, drm_res);
+ igt_assert(lpsp_is_enabled(drm_fd));
+}
+
+static uint32_t create_fb(int drm_fd, int width, int height)
+{
+ struct kmstest_fb fb;
+ cairo_t *cr;
+ uint32_t buffer_id;
+
+ buffer_id = kmstest_create_fb(drm_fd, width, height, 32, 24, false,
+ &fb);
+ cr = kmstest_get_cairo_ctx(drm_fd, &fb);
+ kmstest_paint_test_pattern(cr, width, height);
+ return buffer_id;
+}
+
+static void edp_subtest(int drm_fd, drmModeResPtr drm_res,
+ drmModeConnectorPtr *drm_connectors, uint32_t devid,
+ bool use_panel_fitter)
+{
+ int i, rc;
+ uint32_t connector_id = 0, crtc_id = 0, buffer_id = 0;
+ drmModeModeInfoPtr mode = NULL;
+ drmModeModeInfo std_1024_mode = {
+ .clock = 65000,
+ .hdisplay = 1024,
+ .hsync_start = 1048,
+ .hsync_end = 1184,
+ .htotal = 1344,
+ .vtotal = 806,
+ .hskew = 0,
+ .vdisplay = 768,
+ .vsync_start = 771,
+ .vsync_end = 777,
+ .vtotal = 806,
+ .vscan = 0,
+ .vrefresh = 60,
+ .flags = 0xA,
+ .type = 0x40,
+ .name = "Custom 1024x768",
+ };
+
+ disable_all_screens(drm_fd, drm_res);
+
+ for (i = 0; i < drm_res->count_connectors; i++) {
+ drmModeConnectorPtr c = drm_connectors[i];
+
+ if (c->connector_type != DRM_MODE_CONNECTOR_eDP)
+ continue;
+ if (c->connection != DRM_MODE_CONNECTED)
+ continue;
+
+ if (!use_panel_fitter && c->count_modes) {
+ connector_id = c->connector_id;
+ mode = &c->modes[0];
+ break;
+ }
+ if (use_panel_fitter) {
+ connector_id = c->connector_id;
+
+ /* This is one of the modes Xorg creates for panels, so
+ * it should work just fine. Notice that Gens that
+ * support LPSP are too new for panels with native
+ * 1024x768 resolution, so this should force the panel
+ * fitter. */
+ igt_assert(c->count_modes &&
+ c->modes[0].hdisplay > 1024);
+ igt_assert(c->count_modes &&
+ c->modes[0].vdisplay > 768);
+ mode = &std_1024_mode;
+ break;
+ }
+ }
+ igt_require(connector_id);
+
+ crtc_id = drm_res->crtcs[0];
+ buffer_id = create_fb(drm_fd, mode->hdisplay, mode->vdisplay);
+
+ igt_assert(crtc_id);
+ igt_assert(buffer_id);
+ igt_assert(connector_id);
+ igt_assert(mode);
+
+ rc = drmModeSetCrtc(drm_fd, crtc_id, buffer_id, 0, 0, &connector_id, 1,
+ mode);
+ igt_assert(rc == 0);
+
+ if (use_panel_fitter) {
+ if (IS_HASWELL(devid))
+ igt_assert(!lpsp_is_enabled(drm_fd));
+ else
+ igt_assert(lpsp_is_enabled(drm_fd));
+ } else {
+ igt_assert(lpsp_is_enabled(drm_fd));
+ }
+}
+
+static void non_edp_subtest(int drm_fd, drmModeResPtr drm_res,
+ drmModeConnectorPtr *drm_connectors)
+{
+ int i, rc;
+ uint32_t connector_id = 0, crtc_id = 0, buffer_id = 0;
+ drmModeModeInfoPtr mode = NULL;
+
+ disable_all_screens(drm_fd, drm_res);
+
+ for (i = 0; i < drm_res->count_connectors; i++) {
+ drmModeConnectorPtr c = drm_connectors[i];
+
+ if (c->connector_type == DRM_MODE_CONNECTOR_eDP)
+ continue;
+ if (c->connection != DRM_MODE_CONNECTED)
+ continue;
+
+ if (c->count_modes) {
+ connector_id = c->connector_id;
+ mode = &c->modes[0];
+ break;
+ }
+ }
+ igt_require(connector_id);
+
+ crtc_id = drm_res->crtcs[0];
+ buffer_id = create_fb(drm_fd, mode->hdisplay, mode->vdisplay);
+
+ igt_assert(crtc_id);
+ igt_assert(buffer_id);
+ igt_assert(connector_id);
+ igt_assert(mode);
+
+ rc = drmModeSetCrtc(drm_fd, crtc_id, buffer_id, 0, 0, &connector_id, 1,
+ mode);
+ igt_assert(rc == 0);
+
+ igt_assert(!lpsp_is_enabled(drm_fd));
+}
+
+#define MAX_CONNECTORS 32
+
+int drm_fd;
+uint32_t devid;
+drmModeResPtr drm_res;
+drmModeConnectorPtr drm_connectors[MAX_CONNECTORS];
+
+igt_main
+{
+ igt_fixture {
+ int i;
+
+ drm_fd = drm_open_any();
+ igt_require(drm_fd >= 0);
+
+ devid = intel_get_drm_devid(drm_fd);
+
+ drm_res = drmModeGetResources(drm_fd);
+ igt_assert(drm_res->count_connectors <= MAX_CONNECTORS);
+
+ for (i = 0; i < drm_res->count_connectors; i++)
+ drm_connectors[i] = drmModeGetConnector(drm_fd,
+ drm_res->connectors[i]);
+
+ disable_audio_runtime_pm();
+
+ igt_require(supports_lpsp(devid));
+
+ intel_register_access_init(intel_get_pci_device(), 0);
+
+ igt_set_vt_graphics_mode();
+ }
+
+ igt_subtest("screens-disabled")
+ screens_disabled_subtest(drm_fd, drm_res);
+ igt_subtest("edp-native")
+ edp_subtest(drm_fd, drm_res, drm_connectors, devid, false);
+ igt_subtest("edp-panel-fitter")
+ edp_subtest(drm_fd, drm_res, drm_connectors, devid, true);
+ igt_subtest("non-edp")
+ non_edp_subtest(drm_fd, drm_res, drm_connectors);
+
+ igt_fixture {
+ int i;
+
+ intel_register_access_fini();
+ for (i = 0; i < drm_res->count_connectors; i++)
+ drmModeFreeConnector(drm_connectors[i]);
+ drmModeFreeResources(drm_res);
+ close(drm_fd);
+ }
+}
--
1.8.3.1
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