tests/kms_hdmi_inject: Add test for HDMI injection capabilities.

Original author: Marius Vlad. Includes fixes below.

v5: Convert unit tests to lib selftest.

v4: Add a unit test to make sure synthetic EDID blocks generated by
    IGT is valid (suggested by Petri).

v3: Make audio injection work.

Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>

2 files changed, 273 insertions, 0 deletions

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 7fa9b8f2..7db50112 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -224,6 +224,7 @@ TESTS_progs = \
 	gen3_render_tiledx_blits \
 	gen3_render_tiledy_blits \
 	gen7_forcewake_mt \
+	kms_hdmi_inject \
 	kms_3d \
 	kms_fence_pin_leak \
 	kms_force_connector_basic \
diff --git a/tests/kms_hdmi_inject.c b/tests/kms_hdmi_inject.c
new file mode 100644
index 00000000..cb916ace
--- /dev/null
+++ b/tests/kms_hdmi_inject.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright © 2017 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 <dirent.h>
+#include "igt.h"
+
+#define HDISPLAY_4K	3840
+#define VDISPLAY_4K	2160
+
+IGT_TEST_DESCRIPTION("Tests 4K and audio HDMI injection.");
+
+static drmModeConnector *
+get_connector(int drm_fd, drmModeRes *res)
+{
+	int i;
+	drmModeConnector *connector;
+
+	for (i = 0; i < res->count_connectors; i++) {
+
+		connector =
+			drmModeGetConnectorCurrent(drm_fd, res->connectors[i]);
+
+		if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA &&
+		    connector->connection == DRM_MODE_DISCONNECTED)
+			break;
+
+		drmModeFreeConnector(connector);
+		connector = NULL;
+	}
+
+	return connector;
+}
+
+static void
+hdmi_inject_4k(int drm_fd, drmModeConnector *connector)
+{
+	unsigned char *edid;
+	size_t length;
+	struct kmstest_connector_config config;
+	int ret, cid, i, crtc_mask = -1;
+	int fb_id;
+	struct igt_fb fb;
+	uint8_t found_4k_mode = 0;
+	uint32_t devid;
+
+	devid = intel_get_drm_devid(drm_fd);
+
+	/* 4K requires at least HSW */
+	igt_require(IS_HASWELL(devid) || intel_gen(devid) >= 8);
+
+	kmstest_edid_add_4k(igt_kms_get_base_edid(), EDID_LENGTH, &edid,
+			    &length);
+
+	kmstest_force_edid(drm_fd, connector, edid, length);
+
+	if (!kmstest_force_connector(drm_fd, connector, FORCE_CONNECTOR_ON))
+		igt_skip("Could not force connector on\n");
+
+	cid = connector->connector_id;
+
+	connector = drmModeGetConnectorCurrent(drm_fd, cid);
+
+	for (i = 0; i < connector->count_modes; i++) {
+		if (connector->modes[i].hdisplay == HDISPLAY_4K &&
+		    connector->modes[i].vdisplay == VDISPLAY_4K) {
+			found_4k_mode++;
+			break;
+		}
+	}
+
+	igt_assert(found_4k_mode);
+
+	/* create a configuration */
+	ret = kmstest_get_connector_config(drm_fd, cid, crtc_mask, &config);
+	igt_assert(ret);
+
+	igt_info("  ");
+	kmstest_dump_mode(&connector->modes[i]);
+
+	/* create framebuffer */
+	fb_id = igt_create_fb(drm_fd, connector->modes[i].hdisplay,
+			      connector->modes[i].vdisplay,
+			      DRM_FORMAT_XRGB8888,
+			      LOCAL_DRM_FORMAT_MOD_NONE, &fb);
+
+	ret = drmModeSetCrtc(drm_fd, config.crtc->crtc_id, fb_id, 0, 0,
+			     &connector->connector_id, 1,
+			     &connector->modes[i]);
+
+	igt_assert(ret == 0);
+
+	igt_remove_fb(drm_fd, &fb);
+
+	kmstest_force_connector(drm_fd, connector, FORCE_CONNECTOR_UNSPECIFIED);
+	kmstest_force_edid(drm_fd, connector, NULL, 0);
+
+	free(edid);
+}
+
+static bool
+eld_entry_is_igt(const char* path)
+{
+	FILE *in;
+	char buf[1024];
+	uint8_t eld_valid = 0;
+	uint8_t mon_valid = 0;
+
+	in = fopen(path, "r");
+	if (!in)
+		return false;
+
+	memset(buf, 0, 1024);
+
+	while ((fgets(buf, 1024, in)) != NULL) {
+
+		char *line = buf;
+
+		if (!strncasecmp(line, "eld_valid", 9) &&
+				strstr(line, "1")) {
+			eld_valid++;
+		}
+
+		if (!strncasecmp(line, "monitor_name", 12) &&
+				strstr(line, "IGT")) {
+			mon_valid++;
+		}
+	}
+
+	fclose(in);
+	if (mon_valid && eld_valid)
+		return true;
+
+	return false;
+}
+
+static bool
+eld_is_valid(void)
+{
+	DIR *dir;
+	struct dirent *snd_hda;
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		char cards[128];
+
+		snprintf(cards, sizeof(cards), "/proc/asound/card%d", i);
+		dir = opendir(cards);
+		if (!dir)
+			continue;
+
+		while ((snd_hda = readdir(dir))) {
+			char fpath[128];
+
+			if (*snd_hda->d_name == '.' ||
+			    strstr(snd_hda->d_name, "eld") == 0)
+				continue;
+
+			snprintf(fpath, sizeof(fpath), "%s/%s", cards,
+				 snd_hda->d_name);
+			if (eld_entry_is_igt(fpath)) {
+				closedir(dir);
+				return true;
+			}
+		}
+		closedir(dir);
+	}
+
+	return false;
+}
+
+static void
+hdmi_inject_audio(int drm_fd, drmModeConnector *connector)
+{
+	unsigned char *edid;
+	size_t length;
+	int fb_id, cid, ret, crtc_mask = -1;
+	struct igt_fb fb;
+	struct kmstest_connector_config config;
+
+	kmstest_edid_add_audio(igt_kms_get_base_edid(), EDID_LENGTH, &edid,
+			       &length);
+
+	kmstest_force_edid(drm_fd, connector, edid, length);
+
+	if (!kmstest_force_connector(drm_fd, connector, FORCE_CONNECTOR_ON))
+		igt_skip("Could not force connector on\n");
+
+	cid = connector->connector_id;
+	connector = drmModeGetConnectorCurrent(drm_fd, cid);
+
+	/* create a configuration */
+	ret = kmstest_get_connector_config(drm_fd, cid, crtc_mask, &config);
+	igt_assert(ret);
+
+	/*
+	 * Create a framebuffer as to allow the kernel to enable the pipe and
+	 * enable the audio encoder.
+	 */
+	fb_id = igt_create_fb(drm_fd, connector->modes[0].hdisplay,
+			      connector->modes[0].vdisplay,
+			      DRM_FORMAT_XRGB8888,
+			      LOCAL_DRM_FORMAT_MOD_NONE, &fb);
+
+	ret = drmModeSetCrtc(drm_fd, config.crtc->crtc_id, fb_id, 0, 0,
+			     &connector->connector_id, 1,
+			     &connector->modes[0]);
+
+
+	igt_assert(ret == 0);
+
+	/*
+	 * Test if we have /proc/asound/HDMI/eld#0.0 and is its contents are
+	 * valid.
+	 */
+	igt_assert(eld_is_valid());
+
+	igt_remove_fb(drm_fd, &fb);
+
+	igt_info("  ");
+	kmstest_dump_mode(&connector->modes[0]);
+
+	kmstest_force_connector(drm_fd, connector, FORCE_CONNECTOR_UNSPECIFIED);
+	kmstest_force_edid(drm_fd, connector, NULL, 0);
+
+	free(edid);
+}
+
+igt_main
+{
+	int drm_fd;
+	drmModeRes *res;
+	drmModeConnector *connector;
+
+	igt_fixture {
+		drm_fd = drm_open_driver_master(DRIVER_INTEL);
+		res = drmModeGetResources(drm_fd);
+
+		connector = get_connector(drm_fd, res);
+		igt_require(connector);
+	}
+
+	igt_subtest("inject-4k")
+		hdmi_inject_4k(drm_fd, connector);
+
+	igt_subtest("inject-audio")
+		hdmi_inject_audio(drm_fd, connector);
+
+	igt_fixture {
+		drmModeFreeConnector(connector);
+	}
+}