[Intel-gfx] [PATCH] drm/i915: do dynamic clock freq control only in kernel modesetting

[Zhenyu Wang]

Don't do dynamic clock frequence change if not in kernel
modesetting. But this one keeps render clock control which
should be fine.

Btw, I don't have machine with dual frequence feature to
really test this now, but this fixed kernel oops when kernel
modesetting is disabled.

Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 6a58e1d..81ba1a2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3418,6 +3418,9 @@ static void intel_idle_update(struct work_struct *work)
 		intel_decrease_displayclock(dev);
 	}
 
+	if (!drm_core_check_feature(dev, DRIVER_MODESET))
+		return;
+
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		/* Skip inactive CRTCs */
 		if (!crtc->fb)
@@ -3451,6 +3454,9 @@ void intel_mark_busy(struct drm_device *dev, struct drm_gem_object *obj)
 	dev_priv->busy = true;
 	intel_increase_renderclock(dev, true);
 
+	if (!drm_core_check_feature(dev, DRIVER_MODESET))
+		return;
+
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		if (!crtc->fb)
 			continue;
-- 
1.5.3.8