[Intel-gfx] [PATCH igt] lib/i915: Prepare for the loss of i915.enable_execlists parameter

[Chris Wilson]

If we can't find the enable_execlists parameter, presume that the switch
is forced by the kernel and enabled for all hw supporting execlists. We
don't have a GETPARAM or ENGINE_INFO to query the internal details.

Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
 lib/i915/gem_submission.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/lib/i915/gem_submission.c b/lib/i915/gem_submission.c
index 882d4f41..8bff4844 100644
--- a/lib/i915/gem_submission.c
+++ b/lib/i915/gem_submission.c
@@ -28,6 +28,7 @@
 
 #include "igt_core.h"
 #include "igt_sysfs.h"
+#include "intel_chipset.h"
 
 #include "i915/gem_submission.h"
 
@@ -64,30 +65,30 @@ static bool has_semaphores(int fd, int dir)
  */
 unsigned gem_submission_method(int fd)
 {
+       const int gen = intel_gen(intel_get_drm_devid(fd));
        unsigned flags = 0;
-       bool active;
+       int result;
+
        int dir;
 
        dir = igt_sysfs_open_parameters(fd);
        if (dir < 0)
                return 0;
 
-       active = igt_sysfs_get_boolean(dir, "enable_guc_submission");
-       if (active) {
+       if (igt_sysfs_get_boolean(dir, "enable_guc_submission")) {
                flags |= GEM_SUBMISSION_GUC | GEM_SUBMISSION_EXECLISTS;
                goto out;
        }
 
-       active = igt_sysfs_get_boolean(dir, "enable_execlists");
-       if (active) {
+       if (igt_sysfs_scanf(dir, "enable_execlists", "%d", &result) != 1)
+               result = gen >= 8;
+       if (result) {
                flags |= GEM_SUBMISSION_EXECLISTS;
                goto out;
        }
 
-       active = has_semaphores(fd, dir);
-       if (active) {
+       if (has_semaphores(fd, dir))
                flags |= GEM_SUBMISSION_SEMAPHORES;
-       }
 
 out:
        close(dir);
-- 
2.15.0

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