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drm/i915/skl: Do not allow scaling when crtc is disabled.

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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 Because the crtc is no longer
active this is not a bug, and shouldn't trigger the WARN_ON.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>
Link: http://patchwork.freedesktop.org/patch/msgid/1448360945-5723-2-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
This commit is contained in:
Maarten Lankhorst 2015-11-24 11:29:02 +01:00
parent dd97950a4c
commit bf8a0af0cc
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -13850,7 +13850,7 @@ 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.enable)
return DRM_PLANE_HELPER_NO_SCALING;
dev = intel_crtc->base.dev;