[igt-dev] [PATCH i-g-t 2/3] lib/igt_psr: Add function to check PSR2 selective fetch

[Pankaj Bharadiya]

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 at intel.com>
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya at intel.com>
---
 lib/igt_psr.c | 10 ++++++++++
 lib/igt_psr.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index 6cdb97bcc..d5167fbad 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 8368ecb49..25111cc2b 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);
-- 
2.29.2