[PATCH igt 1/5] lib/igt_kms: add kmstest_get_crtc_idx

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Move it from pm_rpm.c to lib/igt_kms and remove the hardcoded version
from kms_frontbuffer_tracking. I'm also planning to add other callers.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
---
 lib/igt_kms.c                    | 18 ++++++++++++++++++
 lib/igt_kms.h                    |  1 +
 tests/kms_frontbuffer_tracking.c | 10 +++-------
 tests/pm_rpm.c                   | 14 ++------------
 4 files changed, 24 insertions(+), 19 deletions(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 90c8da7..285c1b6 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -875,6 +875,24 @@ void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources)
 	}
 }
 
+/**
+ * kmstest_get_crtc_idx: get the CRTC index based on its ID
+ * @res: the libdrm resources
+ * @crtc_id: the CRTC id
+ *
+ * This is useful since a few places of libdrm deal with CRTC masks.
+ */
+int kmstest_get_crtc_idx(drmModeRes *res, uint32_t crtc_id)
+{
+	int i;
+
+	for (i = 0; i < res->count_crtcs; i++)
+		if (res->crtcs[i] == crtc_id)
+			return i;
+
+	igt_assert(false);
+}
+
 /*
  * A small modeset API
  */
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 3f7add5..2cb7c1f 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -150,6 +150,7 @@ bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
 			  const char *name, uint32_t *prop_id, uint64_t *value,
 			  drmModePropertyPtr *prop);
 void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
+int kmstest_get_crtc_idx(drmModeRes *res, uint32_t crtc_id);
 
 /*
  * A small modeset API
diff --git a/tests/kms_frontbuffer_tracking.c b/tests/kms_frontbuffer_tracking.c
index 26e12d0..88bf5a5 100644
--- a/tests/kms_frontbuffer_tracking.c
+++ b/tests/kms_frontbuffer_tracking.c
@@ -2214,16 +2214,12 @@ static void wait_flip_event(void)
 
 static void set_prim_plane_for_params(struct modeset_params *params)
 {
-	int rc, i, crtc_index = -1;
+	int rc, i;
+	int crtc_idx = kmstest_get_crtc_idx(drm.res, params->crtc_id);
 	uint32_t plane_id = 0;
 
-	for (i = 0; i < drm.res->count_crtcs; i++)
-		if (drm.res->crtcs[i] == params->crtc_id)
-			crtc_index = i;
-	igt_assert(crtc_index >= 0);
-
 	for (i = 0; i < drm.plane_res->count_planes; i++)
-		if ((drm.planes[i]->possible_crtcs & (1 << crtc_index)) &&
+		if ((drm.planes[i]->possible_crtcs & (1 << crtc_idx)) &&
 		    drm.plane_types[i] == DRM_PLANE_TYPE_PRIMARY)
 			plane_id = drm.planes[i]->plane_id;
 	igt_assert(plane_id);
diff --git a/tests/pm_rpm.c b/tests/pm_rpm.c
index 2aa6c10..eeaf324 100644
--- a/tests/pm_rpm.c
+++ b/tests/pm_rpm.c
@@ -1681,17 +1681,6 @@ static void test_one_plane(bool dpms, uint32_t plane_id,
 	igt_assert(wait_for_suspended());
 }
 
-static int get_crtc_idx(drmModeResPtr res, uint32_t crtc_id)
-{
-	int i;
-
-	for (i = 0; i < res->count_crtcs; i++)
-		if (res->crtcs[i] == crtc_id)
-			return i;
-
-	igt_assert(false);
-}
-
 /* This one also triggered WARNs on our driver at some point in time. */
 static void planes_subtest(bool universal, bool dpms)
 {
@@ -1699,7 +1688,8 @@ static void planes_subtest(bool universal, bool dpms)
 	drmModePlaneResPtr planes;
 
 	igt_require(default_mode_params);
-	crtc_idx = get_crtc_idx(ms_data.res, default_mode_params->crtc_id);
+	crtc_idx = kmstest_get_crtc_idx(ms_data.res,
+					default_mode_params->crtc_id);
 
 	if (universal) {
 		rc = drmSetClientCap(drm_fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES,
-- 
2.7.0

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