[PATCH i-g-t 1/5] lib/power: Allow use of rapl by specifying fd=-1

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

igt_power_open() is currently defunct when you don't have
the GPU driver loaded, or when you explicitly want to measure
via rapl even when using a DGPU. Allow those use cases by
accepting fd<0 to indicate that we explicitly want to use rapl.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 lib/igt_power.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/igt_power.c b/lib/igt_power.c
index 810859b134dc..f4d3efcf0cec 100644
--- a/lib/igt_power.c
+++ b/lib/igt_power.c
@@ -106,7 +106,7 @@ int igt_power_open(int fd, struct igt_power *p, const char *domain)
 	p->hwmon_fd = -1;
 	p->rapl.fd = -1;
 
-	is_dgfx = is_xe_device(fd) ? xe_has_vram(fd) : gem_has_lmem(fd);
+	is_dgfx = fd >= 0 && (is_xe_device(fd) ? xe_has_vram(fd) : gem_has_lmem(fd));
 	if (is_dgfx) {
 		if (strncmp(domain, "gpu", strlen("gpu")) == 0) {
 			p->hwmon_fd = igt_hwmon_open(fd);
-- 
2.44.2