[igt-dev] [PATCH i-g-t 4/5] lib/igt_psr: added function to check active dp pr

[Kunal Joshi]

Added function to check if pr is active on a output.
assuming SRDENT is the state to compare when pr is active

Cc: Jouni Högander <jouni.hogander at intel.com>
Cc: Animesh Manna <animesh.manna at intel.com>
Cc: Arun R Murthy <arun.r.murthy at intel.com>
Signed-off-by: Kunal Joshi <kunal1.joshi at intel.com>
---
 lib/igt_psr.c | 23 +++++++++++++++++++++++
 lib/igt_psr.h |  2 +-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index 4c912a064..683379db6 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c
@@ -390,3 +390,26 @@ bool output_supports_pr(int debugfs_fd, igt_output_t *output)
 
         return strstr(buf, "Panel Replay = yes");
 }
+
+bool dp_pr_active_check(int debugfs_fd, igt_output_t *output)
+{
+        char debugfs_file[128] = {0};
+        char buf[PSR_STATUS_MAX_LEN];
+        const char *state = "SRDENT";
+        int ret;
+
+        if (!strstr(output->name,"DP"))
+                return false;
+
+        sprintf(debugfs_file, "%s/i915_sink_status", output->name);
+
+        ret = igt_debugfs_simple_read(debugfs_fd, debugfs_file,
+                                     buf, sizeof(buf));
+        if (ret < 0) {
+                igt_info("Could not read i915_edp_psr_status: %s\n",
+                         strerror(-ret));
+                return false;
+        }
+        igt_skip_on(strstr(buf, "PSR sink not reliable: yes"));
+        return strstr(buf, state);
+}
diff --git a/lib/igt_psr.h b/lib/igt_psr.h
index 8e36fcf2f..dc603ffc3 100644
--- a/lib/igt_psr.h
+++ b/lib/igt_psr.h
@@ -56,5 +56,5 @@ bool i915_psr2_selective_fetch_check(int drm_fd);
 bool i915_psr2_sel_fetch_to_psr1(int drm_fd);
 void i915_psr2_sel_fetch_restore(int drm_fd);
 bool output_supports_pr(int debugfs_fd, igt_output_t *output);
-
+bool dp_pr_active_check(int debugfs_fd, igt_output_t *output);
 #endif
-- 
2.25.1