From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 6 Mar 2018 12:41:55 +0200
Subject: drm/i915/icl: do not save DDI A/E sharing bit for ICL
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Git-commit: 84d4ebdb6c72988a1acddb1856b12427a287149d
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
We don't want to preserve the DDI A 4 lane bit on ICL.
Fixes: 3d2011cfa41f ("drm/i915/icl: remove port A/E lane sharing limitation.")
Cc: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180306104155.3526-1-jani.nikula@intel.com
(cherry picked from commit 1e6aa7e55c28ecd842b8b4599e4273c2429ee061)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/intel_ddi.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3077,9 +3077,12 @@ void intel_ddi_init(struct drm_i915_priv
intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
intel_encoder->cloneable = 0;
- intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
- (DDI_BUF_PORT_REVERSAL |
- DDI_A_4_LANES);
+ if (INTEL_GEN(dev_priv) >= 11)
+ intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
+ DDI_BUF_PORT_REVERSAL;
+ else
+ intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
+ (DDI_BUF_PORT_REVERSAL | DDI_A_4_LANES);
intel_dig_port->dp.output_reg = INVALID_MMIO_REG;
intel_dig_port->max_lanes = intel_ddi_max_lanes(intel_dig_port);