tests/psr: Share the code check if sink supports PSR

The same code checking if sink supports PSR was spread into 3 tests,
better move it to lib and reuse.

v2: splitted previous patch into this one and the next one(Dhinakaran)

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>

5 files changed, 14 insertions, 33 deletions

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index c105bb6e..82012e6d 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c
@@ -129,3 +129,13 @@ bool psr_disable(int debugfs_fd)
 {
 	return psr_set(debugfs_fd, false);
 }
+
+bool psr_sink_support(int debugfs_fd)
+{
+	char buf[PSR_STATUS_MAX_LEN];
+	int ret;
+
+	ret = igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status", buf,
+				      sizeof(buf));
+	return ret > 0 && strstr(buf, "Sink_Support: yes\n");
+}
diff --git a/lib/igt_psr.h b/lib/igt_psr.h
index 96f7bedf..d3336c2d 100644
--- a/lib/igt_psr.h
+++ b/lib/igt_psr.h
@@ -34,5 +34,6 @@ bool psr_wait_entry(int debugfs_fd);
 bool psr_wait_exit(int debugfs_fd);
 bool psr_enable(int debugfs_fd);
 bool psr_disable(int debugfs_fd);
+bool psr_sink_support(int debugfs_fd);
 
 #endif
diff --git a/tests/kms_fbcon_fbt.c b/tests/kms_fbcon_fbt.c
index 0ad53266..2823b47a 100644
--- a/tests/kms_fbcon_fbt.c
+++ b/tests/kms_fbcon_fbt.c
@@ -168,19 +168,6 @@ static void set_mode_for_one_screen(struct drm_info *drm, struct igt_fb *fb,
 	igt_assert_eq(rc, 0);
 }
 
-static bool psr_supported_on_chipset(int debugfs_fd)
-{
-	char buf[PSR_STATUS_MAX_LEN];
-	int ret;
-
-	ret = igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status",
-				      buf, sizeof(buf));
-	if (ret < 0)
-		return false;
-
-	return strstr(buf, "Sink_Support: yes\n");
-}
-
 static bool connector_can_psr(drmModeConnectorPtr connector)
 {
 	return (connector->connector_type == DRM_MODE_CONNECTOR_eDP);
@@ -239,7 +226,7 @@ struct feature {
 	.connector_possible_fn = connector_can_fbc,
 	.enable = fbc_modparam_enable,
 }, psr = {
-	.supported_on_chipset = psr_supported_on_chipset,
+	.supported_on_chipset = psr_sink_support,
 	.wait_until_enabled = psr_wait_until_enabled,
 	.connector_possible_fn = connector_can_psr,
 	.enable = psr_debugfs_enable,
diff --git a/tests/kms_frontbuffer_tracking.c b/tests/kms_frontbuffer_tracking.c
index c366fecf..42f4c289 100644
--- a/tests/kms_frontbuffer_tracking.c
+++ b/tests/kms_frontbuffer_tracking.c
@@ -1417,17 +1417,6 @@ static void teardown_fbc(void)
 {
 }
 
-static bool psr_sink_has_support(void)
-{
-	char buf[PSR_STATUS_MAX_LEN];
-
-	debugfs_read("i915_edp_psr_status", buf);
-	if (*buf == '\0') /* !HAS_PSR -> -ENODEV*/
-		return false;
-
-	return strstr(buf, "Sink_Support: yes\n");
-}
-
 static void setup_psr(void)
 {
 	if (prim_mode_params.output->config.connector->connector_type !=
@@ -1436,7 +1425,7 @@ static void setup_psr(void)
 		return;
 	}
 
-	if (!psr_sink_has_support()) {
+	if (!psr_sink_support(drm.debugfs)) {
 		igt_info("Can't test PSR: not supported by sink.\n");
 		return;
 	}
diff --git a/tests/kms_psr.c b/tests/kms_psr.c
index 20b69892..855679b0 100644
--- a/tests/kms_psr.c
+++ b/tests/kms_psr.c
@@ -191,13 +191,7 @@ static void fill_render(data_t *data, uint32_t handle, unsigned char color)
 
 static bool sink_support(data_t *data)
 {
-	char buf[PSR_STATUS_MAX_LEN];
-
-	igt_debugfs_simple_read(data->debugfs_fd, "i915_edp_psr_status",
-			 buf, sizeof(buf));
-
-	return data->with_psr_disabled ||
-		strstr(buf, "Sink_Support: yes\n");
+	return data->with_psr_disabled || psr_sink_support(data->debugfs_fd);
 }
 
 static bool psr_wait_entry_if_enabled(data_t *data)