From de31facda53b595bc42ac87341a9200f1f4eb414 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Fri, 6 Mar 2015 15:53:32 -0800 Subject: [PATCH] drm/i915/skl: port A fuse straps don't work on early SKL steppings So try to enumerate eDP unconditionally in those cases. Signed-off-by: Jesse Barnes [danvet: Add wa tag Damien dug out.] Reviewed-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 43d3575..31eaa7c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12583,10 +12583,15 @@ static void intel_setup_outputs(struct drm_device *dev) if (HAS_DDI(dev)) { int found; - /* Haswell uses DDI functions to detect digital outputs */ + /* + * Haswell uses DDI functions to detect digital outputs. + * On SKL pre-D0 the strap isn't connected, so we assume + * it's there. + */ found = I915_READ(DDI_BUF_CTL_A) & DDI_INIT_DISPLAY_DETECTED; - /* DDI A only supports eDP */ - if (found) + /* WaIgnoreDDIAStrap: skl */ + if (found || + (IS_SKYLAKE(dev) && INTEL_REVID(dev) < SKL_REVID_D0)) intel_ddi_init(dev, PORT_A); /* DDI B, C and D detection is indicated by the SFUSE_STRAP -- 2.7.4