[PATCH i-g-t 1/2] lib/igt_psr: Added library functions for early trasport

[Jeevan B]

Added helper functions to check sink support for early transport and
check early transport active check.

Signed-off-by: Jeevan B <jeevan.b at intel.com>
---
 lib/igt_psr.c | 13 +++++++++++++
 lib/igt_psr.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index 6008b73a6..8dc6b9b78 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c
@@ -53,6 +53,16 @@ bool selective_fetch_check(int debugfs_fd, igt_output_t *output)
 	return strstr(buf, "PSR2 selective fetch: enabled");
 }
 
+bool psr2_early_transport_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 Early Transport: enabled");
+}
+
 static bool psr_active_check(int debugfs_fd, enum psr_mode mode, igt_output_t *output)
 {
 	char debugfs_file[128] = {0};
@@ -249,6 +259,9 @@ bool psr_sink_support(int device, int debugfs_fd, enum psr_mode mode, igt_output
 		       (strstr(line, "[0x03]") || strstr(line, "[0x04]")));
 	case PR_MODE:
 		return strstr(line, "Panel Replay = yes, Panel Replay Selective Update = no");
+	case ET_MODE:
+		return strstr(buf, "Sink support: yes [0x04]") ||
+			     (strstr(line, "PSR = yes") && strstr(line, "Early Transport = yes"));
 	case PR_MODE_SEL_FETCH:
 		return strstr(line, "Panel Replay = yes, Panel Replay Selective Update = yes");
 	default:
diff --git a/lib/igt_psr.h b/lib/igt_psr.h
index e8595fd8c..23f4dd35b 100644
--- a/lib/igt_psr.h
+++ b/lib/igt_psr.h
@@ -37,6 +37,7 @@ enum psr_mode {
 	PSR_MODE_2_SEL_FETCH,
 	PR_MODE,
 	PR_MODE_SEL_FETCH,
+	ET_MODE,
 	PSR_DISABLED,
 };
 
@@ -47,6 +48,7 @@ enum fbc_mode {
 
 bool psr_disabled_check(int debugfs_fd);
 bool selective_fetch_check(int debugfs_fd, igt_output_t *output);
+bool psr2_early_transport_check(int debugfs_fd);
 bool psr_wait_entry(int debugfs_fd, enum psr_mode mode, igt_output_t *output);
 bool psr_wait_update(int debugfs_fd, enum psr_mode mode, igt_output_t *output);
 bool psr_long_wait_update(int debugfs_fd, enum psr_mode mode, igt_output_t *output);
-- 
2.25.1