[PATCH 11/11] drm/i915/skl: Do not allow scaling when crtc is disabled.

Maarten Lankhorst
2015-10-22T11:56:42Z

This fixes a warning when the crtc is turned off. In that case fb
will be NULL, and crtc_clock will be 0. Because the crtc is no longer
active this is not a bug, and shouldn't trigger the WARN_ON.

Also remove handling a null crtc_state, with all transitional helpers
gone this can no longer happen.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 26931d8eb7ce..6d19723419fb 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13541,7 +13541,7 @@ skl_max_scale(struct intel_crtc *intel_crtc, struct intel_crtc_state *crtc_state
struct drm_i915_private *dev_priv;
int crtc_clock, cdclk;

- if (!intel_crtc || !crtc_state)
+ if (!intel_crtc || !crtc_state->base.active)
return DRM_PLANE_HELPER_NO_SCALING;

dev = intel_crtc->base.dev;
--
2.1.0