[Intel-gfx] [PATCH 64/71] drm/i915/chv: Don't use PCS group access reads

Mika Kuoppala mika.kuoppala at linux.intel.com
Fri Apr 25 17:15:39 CEST 2014


ville.syrjala at linux.intel.com writes:

> From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Minor formatting issue in this one, newline before ';'
And next one in series fixes it.

Patches 60 - 64
Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>

> All PCS groups access reads return 0xffffffff, so we can't use group
> access for RMW cycles. Instead target each spline separately.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h   | 14 ++++++++++++++
>  drivers/gpu/drm/i915/intel_dp.c   | 32 ++++++++++++++++++++++++--------
>  drivers/gpu/drm/i915/intel_hdmi.c | 34 +++++++++++++++++++++++++---------
>  3 files changed, 63 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 4617fb3..ffed03e 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -654,6 +654,13 @@ enum punit_power_well {
>  #define   DPIO_PCS_TX_LANE1_RESET	(1<<7)
>  #define VLV_PCS_DW0(ch) _PORT(ch, _VLV_PCS_DW0_CH0, _VLV_PCS_DW0_CH1)
>  
> +#define _VLV_PCS01_DW0_CH0		0x200
> +#define _VLV_PCS23_DW0_CH0		0x400
> +#define _VLV_PCS01_DW0_CH1		0x2600
> +#define _VLV_PCS23_DW0_CH1		0x2800
> +#define VLV_PCS01_DW0(ch) _PORT(ch, _VLV_PCS01_DW0_CH0, _VLV_PCS01_DW0_CH1)
> +#define VLV_PCS23_DW0(ch) _PORT(ch, _VLV_PCS23_DW0_CH0, _VLV_PCS23_DW0_CH1)
> +
>  #define _VLV_PCS_DW1_CH0		0x8204
>  #define _VLV_PCS_DW1_CH1		0x8404
>  #define   CHV_PCS_REQ_SOFTRESET_EN	(1<<23)
> @@ -663,6 +670,13 @@ enum punit_power_well {
>  #define   DPIO_PCS_CLK_SOFT_RESET	(1<<5)
>  #define VLV_PCS_DW1(ch) _PORT(ch, _VLV_PCS_DW1_CH0, _VLV_PCS_DW1_CH1)
>  
> +#define _VLV_PCS01_DW1_CH0		0x204
> +#define _VLV_PCS23_DW1_CH0		0x404
> +#define _VLV_PCS01_DW1_CH1		0x2604
> +#define _VLV_PCS23_DW1_CH1		0x2804
> +#define VLV_PCS01_DW1(ch) _PORT(ch, _VLV_PCS01_DW1_CH0, _VLV_PCS01_DW1_CH1)
> +#define VLV_PCS23_DW1(ch) _PORT(ch, _VLV_PCS23_DW1_CH0, _VLV_PCS23_DW1_CH1)
> +
>  #define _VLV_PCS_DW8_CH0		0x8220
>  #define _VLV_PCS_DW8_CH1		0x8420
>  #define VLV_PCS_DW8(ch) _PORT(ch, _VLV_PCS_DW8_CH0, _VLV_PCS_DW8_CH1)
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 079e0e3..cc7bccd3 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1845,13 +1845,21 @@ static void chv_post_disable_dp(struct intel_encoder *encoder)
>  	mutex_lock(&dev_priv->dpio_lock);
>  
>  	/* Propagate soft reset to data lane reset */
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW1(ch));
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
>  	val |= CHV_PCS_REQ_SOFTRESET_EN;
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(ch), val);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
>  
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(ch));
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
> +	val |= CHV_PCS_REQ_SOFTRESET_EN;
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
> +	val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
>  	val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(ch), val);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
>  
>  	mutex_unlock(&dev_priv->dpio_lock);
>  }
> @@ -1983,13 +1991,21 @@ static void chv_pre_enable_dp(struct intel_encoder *encoder)
>  	mutex_lock(&dev_priv->dpio_lock);
>  
>  	/* Deassert soft data lane reset*/
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW1(ch));
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
>  	val |= CHV_PCS_REQ_SOFTRESET_EN;
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(ch), val);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
> +	val |= CHV_PCS_REQ_SOFTRESET_EN;
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
> +	val |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
>  
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(ch));
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
>  	val |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(ch), val);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
>  
>  	/* Program Tx lane latency optimal setting*/
>  	for (i = 0; i < 4; i++) {
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 6a2152b..c3896b0 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1216,13 +1216,21 @@ static void chv_hdmi_post_disable(struct intel_encoder *encoder)
>  	mutex_lock(&dev_priv->dpio_lock);
>  
>  	/* Propagate soft reset to data lane reset */
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW1(ch));
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
>  	val |= CHV_PCS_REQ_SOFTRESET_EN;
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(ch), val)
> -;
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(ch));
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
> +	val |= CHV_PCS_REQ_SOFTRESET_EN;
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
> +	val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
>  	val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(ch), val);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
>  
>  	mutex_unlock(&dev_priv->dpio_lock);
>  }
> @@ -1242,13 +1250,21 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
>  	mutex_lock(&dev_priv->dpio_lock);
>  
>  	/* Deassert soft data lane reset*/
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW1(ch));
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
>  	val |= CHV_PCS_REQ_SOFTRESET_EN;
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(ch), val);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
> +	val |= CHV_PCS_REQ_SOFTRESET_EN;
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
> +
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
> +	val |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
>  
> -	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS_DW0(ch));
> +	val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
>  	val |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
> -	vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(ch), val);
> +	vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
>  
>  	/* Program Tx latency optimal setting */
>  	for (i = 0; i < 4; i++) {
> -- 
> 1.8.3.2
>
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