From bcf53de4e60d9000b82f541d654529e2902a4c2c Mon Sep 17 00:00:00 2001 From: =?utf8?q?St=C3=A9phane=20Marchesin?= Date: Fri, 12 Jul 2013 13:54:41 -0700 Subject: [PATCH] drm/i915: Preserve the DDI_A_4_LANES bit from the bios MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Otherwise the DDI_A_4_LANES bit gets lost and we can't use > 2 lanes on eDP. This fixes eDP on hsw with > 2 lanes. Also s/port_reversal/saved_port_bits/ since the current name is confusing. Signed-off-by: Stéphane Marchesin Reviewed-by: Paulo Zanoni Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_ddi.c | 10 ++++++---- drivers/gpu/drm/i915/intel_drv.h | 2 +- 2 files changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 324211ac9c55..b042ee5c4070 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -301,7 +301,7 @@ static void intel_ddi_mode_set(struct drm_encoder *encoder, struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder); - intel_dp->DP = intel_dig_port->port_reversal | + intel_dp->DP = intel_dig_port->saved_port_bits | DDI_BUF_CTL_ENABLE | DDI_BUF_EMP_400MV_0DB_HSW; intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count); @@ -1109,7 +1109,8 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder) * enabling the port. */ I915_WRITE(DDI_BUF_CTL(port), - intel_dig_port->port_reversal | DDI_BUF_CTL_ENABLE); + intel_dig_port->saved_port_bits | + DDI_BUF_CTL_ENABLE); } else if (type == INTEL_OUTPUT_EDP) { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); @@ -1347,8 +1348,9 @@ void intel_ddi_init(struct drm_device *dev, enum port port) intel_encoder->get_config = intel_ddi_get_config; intel_dig_port->port = port; - intel_dig_port->port_reversal = I915_READ(DDI_BUF_CTL(port)) & - DDI_BUF_PORT_REVERSAL; + 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 = DDI_BUF_CTL(port); intel_encoder->type = INTEL_OUTPUT_UNKNOWN; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index c8c9b6f48230..b7d6e09456ce 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -504,7 +504,7 @@ struct intel_dp { struct intel_digital_port { struct intel_encoder base; enum port port; - u32 port_reversal; + u32 saved_port_bits; struct intel_dp dp; struct intel_hdmi hdmi; }; -- 2.20.1