From 9571b190cf474ae02a7e018a21d14052d750070f Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Tue, 8 Sep 2015 18:05:44 +0300 Subject: [PATCH] drm/i915: Don't bypass LRC on CHV MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The docs are unclear as usual, so it's not clear whether LRC should be bypassed, performed normally or GRC code should be used as the LRC code. Some old docs stated that LRC bypass ought to be used, more recent ones no longer say that. Some docs indicated that we could use GRC as the LRC code on CHV, but the BIOS doesn't do that, so let's not do it either. Besides to enable LRC bypass properly, I believe we should set the bit already before deasserting cmnreset. Signed-off-by: Ville Syrjälä Reviewed-by: Deepak S Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 5 ----- drivers/gpu/drm/i915/intel_hdmi.c | 5 ----- 2 files changed, 10 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 97ed418060ff..19cbc2ef542c 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3417,11 +3417,6 @@ static uint32_t chv_signal_levels(struct intel_dp *intel_dp) vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val); } - /* LRC Bypass */ - val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30); - val |= DPIO_LRC_BYPASS; - vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, val); - mutex_unlock(&dev_priv->sb_lock); return 0; diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 3c5f2c922180..3b28ed3237d3 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1952,11 +1952,6 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder) val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3; vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val); - /* LRC Bypass */ - val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30); - val |= DPIO_LRC_BYPASS; - vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, val); - mutex_unlock(&dev_priv->sb_lock); intel_hdmi->set_infoframes(&encoder->base, -- 2.20.1