[PATCH i-g-t 6/6] tools/intel_reg: Add forcewake support to xe

[Lucas De Marchi <lucas.demarchi@intel.com>]

Now that the igt lib is prepared, start passing the open driver fd so
the correct forcewake is taken.

Before:
$ sudo ./build/tools/intel_reg read 0x2358
                                    (0x00002358): 0xffffffff

After:
$ sudo ./build/tools/intel_reg read 0x2358
Opened device: /dev/dri/card0
                                    (0x00002358): 0x91e59eeb

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
---
 tools/intel_reg.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/intel_reg.c b/tools/intel_reg.c
index 906ae9b84..b650c3697 100644
--- a/tools/intel_reg.c
+++ b/tools/intel_reg.c
@@ -802,7 +802,18 @@ static int parse_reg(struct config *config, struct reg *reg, const char *s)
 
 static int register_access_init(struct config *config)
 {
-	return intel_register_access_init(&config->mmio_data, config->pci_dev, 0, -1);
+	int drm_fd = __drm_open_driver(DRIVER_INTEL | DRIVER_XE);
+	int ret;
+
+	if (drm_fd < 0) {
+		fprintf(stderr, "could not open i915 or xe device\n");
+		return EXIT_FAILURE;
+	}
+
+	ret = intel_register_access_init(&config->mmio_data, config->pci_dev, 0, drm_fd);
+	close(drm_fd);
+
+	return ret;
 }
 
 /* XXX: add support for register ranges, maybe REGISTER..REGISTER */
-- 
2.46.1