From 570e2a747bc06cd8620662c5125ec2dc964c511b Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 18 Aug 2014 14:42:46 +0300 Subject: [PATCH] drm/i915: Clear TX FIFO reset master override bits on chv MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Clear the override bits to make sure the hardware manages the TX FIFO reset master on its own. v2: Squash with the earlier attempt at forcing the override bits Signed-off-by: Ville Syrjälä Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 12 ++++++++++++ drivers/gpu/drm/i915/intel_dp.c | 9 +++++++++ drivers/gpu/drm/i915/intel_hdmi.c | 9 +++++++++ 3 files changed, 30 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index d0df76d48184..2ed02c391f3b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -796,6 +796,8 @@ enum punit_power_well { #define _VLV_PCS_DW0_CH1 0x8400 #define DPIO_PCS_TX_LANE2_RESET (1<<16) #define DPIO_PCS_TX_LANE1_RESET (1<<7) +#define DPIO_LEFT_TXFIFO_RST_MASTER2 (1<<4) +#define DPIO_RIGHT_TXFIFO_RST_MASTER2 (1<<3) #define VLV_PCS_DW0(ch) _PORT(ch, _VLV_PCS_DW0_CH0, _VLV_PCS_DW0_CH1) #define _VLV_PCS01_DW0_CH0 0x200 @@ -872,8 +874,18 @@ enum punit_power_well { #define _VLV_PCS_DW11_CH0 0x822c #define _VLV_PCS_DW11_CH1 0x842c +#define DPIO_LANEDESKEW_STRAP_OVRD (1<<3) +#define DPIO_LEFT_TXFIFO_RST_MASTER (1<<1) +#define DPIO_RIGHT_TXFIFO_RST_MASTER (1<<0) #define VLV_PCS_DW11(ch) _PORT(ch, _VLV_PCS_DW11_CH0, _VLV_PCS_DW11_CH1) +#define _VLV_PCS01_DW11_CH0 0x022c +#define _VLV_PCS23_DW11_CH0 0x042c +#define _VLV_PCS01_DW11_CH1 0x262c +#define _VLV_PCS23_DW11_CH1 0x282c +#define VLV_PCS01_DW11(ch) _PORT(ch, _VLV_PCS01_DW0_CH0, _VLV_PCS01_DW0_CH1) +#define VLV_PCS23_DW11(ch) _PORT(ch, _VLV_PCS23_DW0_CH0, _VLV_PCS23_DW0_CH1) + #define _VLV_PCS_DW12_CH0 0x8230 #define _VLV_PCS_DW12_CH1 0x8430 #define VLV_PCS_DW12(ch) _PORT(ch, _VLV_PCS_DW12_CH0, _VLV_PCS_DW12_CH1) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 22d6c3ed371e..3fed8cb22f4d 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2731,6 +2731,15 @@ static void chv_pre_enable_dp(struct intel_encoder *encoder) mutex_lock(&dev_priv->dpio_lock); + /* allow hardware to manage TX FIFO reset source */ + val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch)); + val &= ~DPIO_LANEDESKEW_STRAP_OVRD; + vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val); + + val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch)); + val &= ~DPIO_LANEDESKEW_STRAP_OVRD; + vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val); + /* Deassert soft data lane reset*/ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch)); val |= CHV_PCS_REQ_SOFTRESET_EN; diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 386932a256e1..9cbb7e4a40f5 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1400,6 +1400,15 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder) mutex_lock(&dev_priv->dpio_lock); + /* allow hardware to manage TX FIFO reset source */ + val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch)); + val &= ~DPIO_LANEDESKEW_STRAP_OVRD; + vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val); + + val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch)); + val &= ~DPIO_LANEDESKEW_STRAP_OVRD; + vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val); + /* Deassert soft data lane reset*/ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch)); val |= CHV_PCS_REQ_SOFTRESET_EN; -- 2.20.1