[PATCH i-g-t v2 3/8] lib/i915/fbc: extract intel_fbc_get_fbc_status()

[Vinod Govindapillai <vinod.govindapillai@intel.com>]

Code to read the FBC status from the debugfs is being duplicated
in many places. Extract intel_fbc_get_fbc_status() to be used as
the single source to read the current FBC status.

Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
---
 lib/i915/intel_fbc.c | 35 +++++++++++++++++++++++++----------
 lib/i915/intel_fbc.h |  1 +
 2 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/lib/i915/intel_fbc.c b/lib/i915/intel_fbc.c
index b8c714d43..81aa5c5a5 100644
--- a/lib/i915/intel_fbc.c
+++ b/lib/i915/intel_fbc.c
@@ -22,6 +22,27 @@ void intel_fbc_disable(igt_display_t *display)
 	igt_set_module_param_int(display->drm_fd, "enable_fbc", 0);
 }
 
+/**
+ * intel_fbc_get_fbc_status
+ * @crtc: CRTC
+ * @fbc_status: Buffer to fill the current fbc status
+ * @buf_size: Size of the buffer to be filled
+ *
+ * Read the debugfs entry for current fbc status of a crtc
+ *
+ * Returns:
+ * None
+ */
+void intel_fbc_get_fbc_status(igt_crtc_t *crtc, char *fbc_status, int buf_size)
+{
+	int dir;
+
+	dir = igt_crtc_debugfs_dir(crtc);
+	igt_require_fd(dir);
+	igt_debugfs_simple_read(dir, "i915_fbc_status", fbc_status, buf_size);
+	close(dir);
+}
+
 /**
  * intel_fbc_supported:
  * @crtc: CRTC
@@ -34,12 +55,9 @@ void intel_fbc_disable(igt_display_t *display)
 bool intel_fbc_supported(igt_crtc_t *crtc)
 {
 	char buf[FBC_STATUS_BUF_LEN];
-	int dir;
 
-	dir = igt_crtc_debugfs_dir(crtc);
-	igt_require_fd(dir);
-	igt_debugfs_simple_read(dir, "i915_fbc_status", buf, sizeof(buf));
-	close(dir);
+	intel_fbc_get_fbc_status(crtc, buf, sizeof(buf));
+
 	if (*buf == '\0')
 		return false;
 
@@ -51,12 +69,9 @@ static bool _intel_fbc_is_enabled(igt_crtc_t *crtc, int log_level, char *last_fb
 {
 	char buf[FBC_STATUS_BUF_LEN];
 	bool print = true;
-	int dir;
 
-	dir = igt_crtc_debugfs_dir(crtc);
-	igt_require_fd(dir);
-	igt_debugfs_simple_read(dir, "i915_fbc_status", buf, sizeof(buf));
-	close(dir);
+	intel_fbc_get_fbc_status(crtc, buf, sizeof(buf));
+
 	if (log_level != IGT_LOG_DEBUG)
 		last_fbc_buf[0] = '\0';
 	else if (strcmp(last_fbc_buf, buf))
diff --git a/lib/i915/intel_fbc.h b/lib/i915/intel_fbc.h
index b4596cca5..d62ad73fc 100644
--- a/lib/i915/intel_fbc.h
+++ b/lib/i915/intel_fbc.h
@@ -25,5 +25,6 @@ bool intel_fbc_wait_until_enabled(igt_crtc_t *crtc);
 bool intel_fbc_is_enabled(igt_crtc_t *crtc, int log_level);
 bool intel_fbc_plane_size_supported(igt_display_t *display, uint32_t width, uint32_t height);
 bool intel_fbc_supported_for_psr_mode(igt_display_t *display, enum psr_mode mode);
+void intel_fbc_get_fbc_status(igt_crtc_t *crtc, char *fbc_status, int buf_size);
 
 #endif
-- 
2.43.0