drm/i915: rc6 in sysfs
Merge rc6 information into the power group for our device. Until now the
i915 driver has not had any sysfs entries (aside from the connector
stuff enabled by drm core). Since it seems like we're likely to have
more in the future I created a new file for sysfs stubs, as well as the
rc6 sysfs functions which don't really belong elsewhere (perhaps
i915_suspend, but most of the stuff is in intel_display,c).
displays rc6 modes enabled (as a hex mask):
cat /sys/class/drm/card0/power/rc6_enable
displays #ms GPU has been in rc6 since boot:
cat /sys/class/drm/card0/power/rc6_residency_ms
displays #ms GPU has been in deep rc6 since boot:
cat /sys/class/drm/card0/power/rc6p_residency_ms
displays #ms GPU has been in deepest rc6 since boot:
cat /sys/class/drm/card0/power/rc6pp_residency_ms
Important note: I've seen on SNB that even when RC6 is *not* enabled the
rc6 register seems to have a random value in it. I can only guess at the
reason reason for this. Those writing tools that utilize this value need
to be careful and probably want to scrutinize the value very carefully.
v2: use common rc6 residency units to milliseconds for the other RC6 types
v3: don't create sysfs files for GEN <= 5
add a rc6_enable to show a mask of enabled rc6 types
use unmerge instead of remove for sysfs group
squash intel_enable_rc6() extraction into this patch
v4: rename sysfs files (Chris)
CC: Chris Wilson <chris@chris-wilson.co.uk>
CC: Daniel Vetter <daniel.vetter@ffwll.ch>f
CC: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: squash in the 64bit division fix by Chris Wilson.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 7dcdccb..a189f75 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1385,6 +1385,10 @@
extern int i915_save_state(struct drm_device *dev);
extern int i915_restore_state(struct drm_device *dev);
+/* i915_sysfs.c */
+void i915_setup_sysfs(struct drm_device *dev_priv);
+void i915_teardown_sysfs(struct drm_device *dev_priv);
+
/* intel_i2c.c */
extern int intel_setup_gmbus(struct drm_device *dev);
extern void intel_teardown_gmbus(struct drm_device *dev);
@@ -1441,6 +1445,7 @@
extern void gen6_set_rps(struct drm_device *dev, u8 val);
extern void intel_detect_pch(struct drm_device *dev);
extern int intel_trans_dp_port_sel(struct drm_crtc *crtc);
+extern int intel_enable_rc6(const struct drm_device *dev);
extern bool i915_semaphore_is_enabled(struct drm_device *dev);
extern void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv);