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Commit 28cf798f authored by Chris Wilson's avatar Chris Wilson Committed by Eric Anholt
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drm/i915: Don't update the render-clock for every bo. 



Only update the render-clock on transition from busy to idle and vice
versa, or else we burn a significant percentage of the cpu just rewriting
the register -- not quite as power-friendly as intended ;-)

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 38b3037e

drivers/gpu/drm/i915/intel_display.c

+7 −2
Original line number Original line Diff line number Diff line
@@ -4052,8 +4052,13 @@ void intel_mark_busy(struct drm_device *dev, struct drm_gem_object *obj) 
	if (!drm_core_check_feature(dev, DRIVER_MODESET))

	if (!drm_core_check_feature(dev, DRIVER_MODESET))

		return;

		return;





	if (!dev_priv->busy) {

		dev_priv->busy = true;

		dev_priv->busy = true;

		intel_increase_renderclock(dev, true);

		intel_increase_renderclock(dev, true);

	} else {

		mod_timer(&dev_priv->idle_timer, jiffies +

			  msecs_to_jiffies(GPU_IDLE_TIMEOUT));

	}





	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {

		if (!crtc->fb)

		if (!crtc->fb)