There is currently conflicting documentation on which steppings the
workaround is needed, up to C vs. forever. However there is post-C
stepping hardware that doesn't report port presence on DDI A, leading to
black screen on eDP. Assume the strap isn't connected, and try to enable
DDI A on these machines. (We'll still check the VBT for the info in DDI
init.)
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Cc: Mika Westerberg <mika.westerb...@intel.com>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 21aa745caed1..aa208a2cfafc 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13949,8 +13949,7 @@ static void intel_setup_outputs(struct drm_device *dev)
*/
found = I915_READ(DDI_BUF_CTL_A) & DDI_INIT_DISPLAY_DETECTED;
/* WaIgnoreDDIAStrap: skl */
- if (found ||
- (IS_SKYLAKE(dev) && INTEL_REVID(dev) < SKL_REVID_D0))
+ if (found || IS_SKYLAKE(dev))
intel_ddi_init(dev, PORT_A);
/* DDI B, C and D detection is indicated by the SFUSE_STRAP
--
2.1.4
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