lib/igt_psr: Add function to check PSR2 selective fetch

Add a helper function to check whether "PSR2 selective fetch" is
enabled.
This function should be used wherever "PSR2 selective fetch"
status check needed.

Reviewed-by: Jose Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>

2 files changed, 11 insertions, 0 deletions

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index 6cdb97bc..d5167fba 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c
@@ -36,6 +36,16 @@ bool psr_disabled_check(int debugfs_fd)
 	return strstr(buf, "PSR mode: disabled\n");
 }
 
+bool psr2_selective_fetch_check(int debugfs_fd)
+{
+	char buf[PSR_STATUS_MAX_LEN];
+
+	igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status", buf,
+				sizeof(buf));
+
+	return strstr(buf, "PSR2 selective fetch: enabled");
+}
+
 static bool psr_active_check(int debugfs_fd, enum psr_mode mode)
 {
 	char buf[PSR_STATUS_MAX_LEN];
diff --git a/lib/igt_psr.h b/lib/igt_psr.h
index 8368ecb4..25111cc2 100644
--- a/lib/igt_psr.h
+++ b/lib/igt_psr.h
@@ -36,6 +36,7 @@ enum psr_mode {
 };
 
 bool psr_disabled_check(int debugfs_fd);
+bool psr2_selective_fetch_check(int debugfs_fd);
 bool psr_wait_entry(int debugfs_fd, enum psr_mode mode);
 bool psr_wait_update(int debugfs_fd, enum psr_mode mode);
 bool psr_long_wait_update(int debugfs_fd, enum psr_mode mode);