[Intel-gfx] [i-g-t PATCH v2 1/2] lib: update kmstest_get_pipe_from_crtc_id

[Tomeu Vizoso]

From: Micah Fedke <micah.fedke at collabora.co.uk>

This function uses an intel-specific ioctl to fetch a mapping between pipes and
crtc ids, but this technique is outdated as the crtc id is now always
equivalent to its index in the array of crtcs returned by the kernel.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso at collabora.com>
---

Changes in v2: None

 lib/igt_kms.c | 33 ++++++++++++++++++++++++---------
 1 file changed, 24 insertions(+), 9 deletions(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 9f18aef72ea0..1d9acce31676 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -261,20 +261,35 @@ void kmstest_dump_mode(drmModeModeInfo *mode)
  * @fd: DRM fd
  * @crtc_id: DRM CRTC id
  *
- * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
- * to an enum pipe value used in other helper functions.
+ * Returns: The crtc index for the given DRM CRTC ID @crtc_id. The crtc index
+ * is the equivalent of the pipe id.  This value maps directly to an enum pipe
+ * value used in other helper functions.  Returns 0 if the index could not be
+ * determined.
  */
+
 int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id)
 {
-	struct drm_i915_get_pipe_from_crtc_id pfci;
-	int ret;
+	drmModeRes *res;
+	drmModeCrtc *crtc;
+	int i, cur_id;
+
+	res = drmModeGetResources(fd);
+	igt_assert(res);
+
+	for (i = 0; i < res->count_crtcs; i++) {
+		crtc = drmModeGetCrtc(fd, res->crtcs[i]);
+		igt_assert(crtc);
+		cur_id = crtc->crtc_id;
+		drmModeFreeCrtc(crtc);
+		if (cur_id == crtc_id)
+			break;
+	}
+
+	drmModeFreeResources(res);
 
-	memset(&pfci, 0, sizeof(pfci));
-	pfci.crtc_id = crtc_id;
-	ret = drmIoctl(fd, DRM_IOCTL_I915_GET_PIPE_FROM_CRTC_ID, &pfci);
-	igt_assert(ret == 0);
+	igt_assert(i < res->count_crtcs);
 
-	return pfci.pipe;
+	return i;
 }
 
 /**
-- 
2.5.0