From f72df8dbe2211cf2b70e54f8e9408b889fa56974 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 9 Apr 2014 13:29:03 +0300 Subject: [PATCH] drm/i915/chv: Don't do group access reads from TX lanes either MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Like PCS, TX group reads return 0xffffffff. So we need to target each lane separately if we want to use RMW cycles to update the registers. Signed-off-by: Ville Syrjälä Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 11 +++++++ drivers/gpu/drm/i915/intel_dp.c | 49 +++++++++++++++++++------------ drivers/gpu/drm/i915/intel_hdmi.c | 28 +++++++++++------- 3 files changed, 59 insertions(+), 29 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index eba35bcca2ac..8bcc5e2313f5 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -807,6 +807,17 @@ enum punit_power_well { #define _TXLANE(ch, lane, offset) ((ch ? 0x2400 : 0) + \ (lane) * 0x200 + (offset)) +#define CHV_TX_DW0(ch, lane) _TXLANE(ch, lane, 0x80) +#define CHV_TX_DW1(ch, lane) _TXLANE(ch, lane, 0x84) +#define CHV_TX_DW2(ch, lane) _TXLANE(ch, lane, 0x88) +#define CHV_TX_DW3(ch, lane) _TXLANE(ch, lane, 0x8c) +#define CHV_TX_DW4(ch, lane) _TXLANE(ch, lane, 0x90) +#define CHV_TX_DW5(ch, lane) _TXLANE(ch, lane, 0x94) +#define CHV_TX_DW6(ch, lane) _TXLANE(ch, lane, 0x98) +#define CHV_TX_DW7(ch, lane) _TXLANE(ch, lane, 0x9c) +#define CHV_TX_DW8(ch, lane) _TXLANE(ch, lane, 0xa0) +#define CHV_TX_DW9(ch, lane) _TXLANE(ch, lane, 0xa4) +#define CHV_TX_DW10(ch, lane) _TXLANE(ch, lane, 0xa8) #define CHV_TX_DW11(ch, lane) _TXLANE(ch, lane, 0xac) #define DPIO_FRC_LATENCY_SHFIT 8 #define CHV_TX_DW14(ch, lane) _TXLANE(ch, lane, 0xb8) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index d98de3c18621..f36904c14666 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2311,10 +2311,11 @@ static uint32_t intel_chv_signal_levels(struct intel_dp *intel_dp) struct drm_i915_private *dev_priv = dev->dev_private; struct intel_digital_port *dport = dp_to_dig_port(intel_dp); struct intel_crtc *intel_crtc = to_intel_crtc(dport->base.base.crtc); - u32 deemph_reg_value, margin_reg_value, val, tx_dw2; + u32 deemph_reg_value, margin_reg_value, val; uint8_t train_set = intel_dp->train_set[0]; enum dpio_channel ch = vlv_dport_to_channel(dport); - int pipe = intel_crtc->pipe; + enum pipe pipe = intel_crtc->pipe; + int i; switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { case DP_TRAIN_PRE_EMPHASIS_0: @@ -2392,21 +2393,27 @@ static uint32_t intel_chv_signal_levels(struct intel_dp *intel_dp) vlv_dpio_write(dev_priv, pipe, CHV_PCS_DW10(ch), 0); /* Program swing deemph */ - val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW4(ch)); - val &= ~DPIO_SWING_DEEMPH9P5_MASK; - val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT; - vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(ch), val); + for (i = 0; i < 4; i++) { + val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i)); + val &= ~DPIO_SWING_DEEMPH9P5_MASK; + val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT; + vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val); + } /* Program swing margin */ - tx_dw2 = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW2(ch)); - tx_dw2 &= ~DPIO_SWING_MARGIN_MASK; - tx_dw2 |= margin_reg_value << DPIO_SWING_MARGIN_SHIFT; - vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(ch), tx_dw2); + for (i = 0; i < 4; i++) { + val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i)); + val &= ~DPIO_SWING_MARGIN_MASK; + val |= margin_reg_value << DPIO_SWING_MARGIN_SHIFT; + vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val); + } /* Disable unique transition scale */ - val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW3(ch)); - val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN; - vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(ch), val); + for (i = 0; i < 4; i++) { + val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i)); + val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN; + vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val); + } if (((train_set & DP_TRAIN_PRE_EMPHASIS_MASK) == DP_TRAIN_PRE_EMPHASIS_0) && @@ -2419,12 +2426,18 @@ static uint32_t intel_chv_signal_levels(struct intel_dp *intel_dp) * For now, for this unique transition scale selection, set bit * 27 for ch0 and ch1. */ - val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW3(ch)); - val |= DPIO_TX_UNIQ_TRANS_SCALE_EN; - vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(ch), val); + for (i = 0; i < 4; i++) { + val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i)); + val |= DPIO_TX_UNIQ_TRANS_SCALE_EN; + vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val); + } - tx_dw2 |= (0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT); - vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(ch), tx_dw2); + for (i = 0; i < 4; i++) { + val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i)); + val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT); + val |= (0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT); + vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val); + } } /* Start swing calculation */ diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index b976255f7961..9d9b019953fb 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1330,20 +1330,26 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder) /* FIXME: Program the support xxx V-dB */ /* Use 800mV-0dB */ - val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW4(ch)); - val &= ~DPIO_SWING_DEEMPH9P5_MASK; - val |= 128 << DPIO_SWING_DEEMPH9P5_SHIFT; - vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(ch), val); + for (i = 0; i < 4; i++) { + val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i)); + val &= ~DPIO_SWING_DEEMPH9P5_MASK; + val |= 128 << DPIO_SWING_DEEMPH9P5_SHIFT; + vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val); + } - val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW2(ch)); - val &= ~DPIO_SWING_MARGIN_MASK; - val |= 102 << DPIO_SWING_MARGIN_SHIFT; - vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(ch), val); + for (i = 0; i < 4; i++) { + val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i)); + val &= ~DPIO_SWING_MARGIN_MASK; + val |= 102 << DPIO_SWING_MARGIN_SHIFT; + vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val); + } /* Disable unique transition scale */ - val = vlv_dpio_read(dev_priv, pipe, VLV_TX_DW3(ch)); - val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN; - vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(ch), val); + for (i = 0; i < 4; i++) { + val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i)); + val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN; + vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val); + } /* Additional steps for 1200mV-0dB */ #if 0 -- GitLab