i965: Remove unused devinfo revision

I left the function to obtain the revision because it is, and will continue to
be useful in the future. I'd rather not have to dig it up every time we need it.
Comments left at the implementation to say as much.

This was accidentally left here when I moved the early platform support:
commit 28ed1e08e8ba98ebd4ff0b56326372f0df9c73ad
Author: Ben Widawsky <[email protected]>
Date:   Fri Aug 7 13:58:37 2015 -0700

    i965/skl: Remove early platform support

Signed-off-by: Ben Widawsky <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>

3 files changed, 13 insertions, 5 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_device_info.c b/src/mesa/drivers/dri/i965/brw_device_info.c
index a6a3bb670ca..e86b5309688 100644
--- a/src/mesa/drivers/dri/i965/brw_device_info.c
+++ b/src/mesa/drivers/dri/i965/brw_device_info.c
@@ -359,7 +359,7 @@ static const struct brw_device_info brw_device_info_bxt = {
 };
 
 const struct brw_device_info *
-brw_get_device_info(int devid, int revision)
+brw_get_device_info(int devid)
 {
    const struct brw_device_info *devinfo;
    switch (devid) {
diff --git a/src/mesa/drivers/dri/i965/brw_device_info.h b/src/mesa/drivers/dri/i965/brw_device_info.h
index 2a73e937d9f..4911c233dea 100644
--- a/src/mesa/drivers/dri/i965/brw_device_info.h
+++ b/src/mesa/drivers/dri/i965/brw_device_info.h
@@ -86,4 +86,4 @@ struct brw_device_info
    /** @} */
 };
 
-const struct brw_device_info *brw_get_device_info(int devid, int revision);
+const struct brw_device_info *brw_get_device_info(int devid);
diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 590c45d93ea..fb95fb629ad 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -1357,7 +1357,16 @@ set_max_gl_versions(struct intel_screen *screen)
    }
 }
 
-static int
+/**
+ * Return the revision (generally the revid field of the PCI header) of the
+ * graphics device.
+ *
+ * XXX: This function is useful to keep around even if it is not currently in
+ * use. It is necessary for new platforms and revision specific workarounds or
+ * features. Please don't remove it so that we know it at least continues to
+ * build.
+ */
+static __attribute__((__unused__)) int
 brw_get_revision(int fd)
 {
    struct drm_i915_getparam gp;
@@ -1416,8 +1425,7 @@ __DRIconfig **intelInitScreen2(__DRIscreen *psp)
        return false;
 
    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
-   intelScreen->devinfo = brw_get_device_info(intelScreen->deviceID,
-                                              brw_get_revision(psp->fd));
+   intelScreen->devinfo = brw_get_device_info(intelScreen->deviceID);
    if (!intelScreen->devinfo)
       return false;