diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 110552f..6346b29 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2462,6 +2462,13 @@ intel_dp_init(struct drm_device *dev, int output_reg) pp_off = I915_READ(PCH_PP_OFF_DELAYS); pp_div = I915_READ(PCH_PP_DIVISOR); + if (!pp_on || !pp_off || !pp_div) { + DRM_INFO("bad panel power sequencing delays, disabling panel\n"); + intel_dp_encoder_destroy(&intel_dp->base.base); + intel_dp_destroy(&intel_connector->base); + return; + } + /* Pull timing values out of registers */ cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> PANEL_POWER_UP_DELAY_SHIFT; |
