Re: [PATCH 67/71] drm/i915/chv: Try to program the PHY used clock channel overrides

Mika Kuoppala
2014-05-27T13:41:17Z

ville.syrjala@linux.intel.com writes:

> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> These should make it possible to feed port C from pipe A or port B from
> pipe B. Didn't quite seem to work though.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>

> ---
> drivers/gpu/drm/i915/i915_reg.h | 7 ++++++
> drivers/gpu/drm/i915/intel_dp.c | 46 +++++++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/intel_hdmi.c | 46 +++++++++++++++++++++++++++++++++++++++
> 3 files changed, 99 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 7056994..4bb733b 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -679,6 +679,8 @@ enum punit_power_well {
>
> #define _VLV_PCS_DW8_CH0 0x8220
> #define _VLV_PCS_DW8_CH1 0x8420
> +#define CHV_PCS_USEDCLKCHANNEL_OVRRIDE (1 << 20)
> +#define CHV_PCS_USEDCLKCHANNEL (1 << 21)
> #define VLV_PCS_DW8(ch) _PORT(ch, _VLV_PCS_DW8_CH0, _VLV_PCS_DW8_CH1)
>
> #define _VLV_PCS01_DW8_CH0 0x0220
> @@ -803,6 +805,11 @@ enum punit_power_well {
> #define DPIO_DCLKP_EN (1 << 13)
> #define CHV_CMN_DW14(ch) _PIPE(ch, _CHV_CMN_DW14_CH0, _CHV_CMN_DW1_CH1)
>
> +#define _CHV_CMN_DW19_CH0 0x814c
> +#define _CHV_CMN_DW6_CH1 0x8098
> +#define CHV_CMN_USEDCLKCHANNEL (1 << 13)
> +#define CHV_CMN_DW19(ch) _PIPE(ch, _CHV_CMN_DW19_CH0, _CHV_CMN_DW6_CH1)
> +
> #define CHV_CMN_DW30 0x8178
> #define DPIO_LRC_BYPASS (1 << 3)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 9cbd702..9d6982e 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -2037,6 +2037,51 @@ static void chv_pre_enable_dp(struct intel_encoder *encoder)
> vlv_wait_port_ready(dev_priv, dport);
> }
>
> +static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
> +{
> + struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
> + struct drm_device *dev = encoder->base.dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct intel_crtc *intel_crtc =
> + to_intel_crtc(encoder->base.crtc);
> + enum dpio_channel ch = vlv_dport_to_channel(dport);
> + enum pipe pipe = intel_crtc->pipe;
> + u32 val;
> +
> + mutex_lock(&dev_priv->dpio_lock);
> +
> + /* program clock channel usage */
> + val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
> + val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
> + if (pipe != PIPE_B)
> + val &= ~CHV_PCS_USEDCLKCHANNEL;
> + else
> + val |= CHV_PCS_USEDCLKCHANNEL;
> + vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
> +
> + val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
> + val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
> + if (pipe != PIPE_B)
> + val &= ~CHV_PCS_USEDCLKCHANNEL;
> + else
> + val |= CHV_PCS_USEDCLKCHANNEL;
> + vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
> +
> + /*
> + * This a a bit weird since generally CL
> + * matches the pipe, but here we need to
> + * pick the CL based on the port.
> + */
> + val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
> + if (pipe != PIPE_B)
> + val &= ~CHV_CMN_USEDCLKCHANNEL;
> + else
> + val |= CHV_CMN_USEDCLKCHANNEL;
> + vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
> +
> + mutex_unlock(&dev_priv->dpio_lock);
> +}
> +
> /*
> * Native read with retry for link status and receiver capability reads for
> * cases where the sink may still be asleep.
> @@ -4134,6 +4179,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
> intel_encoder->get_hw_state = intel_dp_get_hw_state;
> intel_encoder->get_config = intel_dp_get_config;
> if (IS_CHERRYVIEW(dev)) {
> + intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
> intel_encoder->pre_enable = chv_pre_enable_dp;
> intel_encoder->enable = vlv_enable_dp;
> intel_encoder->post_disable = chv_post_disable_dp;
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index d2b1186..d36f74c 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -1186,6 +1186,51 @@ static void vlv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
> mutex_unlock(&dev_priv->dpio_lock);
> }
>
> +static void chv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
> +{
> + struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
> + struct drm_device *dev = encoder->base.dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct intel_crtc *intel_crtc =
> + to_intel_crtc(encoder->base.crtc);
> + enum dpio_channel ch = vlv_dport_to_channel(dport);
> + enum pipe pipe = intel_crtc->pipe;
> + u32 val;
> +
> + mutex_lock(&dev_priv->dpio_lock);
> +
> + /* program clock channel usage */
> + val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
> + val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
> + if (pipe != PIPE_B)
> + val &= ~CHV_PCS_USEDCLKCHANNEL;
> + else
> + val |= CHV_PCS_USEDCLKCHANNEL;
> + vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
> +
> + val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
> + val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
> + if (pipe != PIPE_B)
> + val &= ~CHV_PCS_USEDCLKCHANNEL;
> + else
> + val |= CHV_PCS_USEDCLKCHANNEL;
> + vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
> +
> + /*
> + * This a a bit weird since generally CL
> + * matches the pipe, but here we need to
> + * pick the CL based on the port.
> + */
> + val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
> + if (pipe != PIPE_B)
> + val &= ~CHV_CMN_USEDCLKCHANNEL;
> + else
> + val |= CHV_CMN_USEDCLKCHANNEL;
> + vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
> +
> + mutex_unlock(&dev_priv->dpio_lock);
> +}
> +
> static void vlv_hdmi_post_disable(struct intel_encoder *encoder)
> {
> struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
> @@ -1486,6 +1531,7 @@ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
> intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
> intel_encoder->get_config = intel_hdmi_get_config;
> if (IS_CHERRYVIEW(dev)) {
> + intel_encoder->pre_pll_enable = chv_hdmi_pre_pll_enable;
> intel_encoder->pre_enable = chv_hdmi_pre_enable;
> intel_encoder->enable = vlv_enable_hdmi;
> intel_encoder->post_disable = chv_hdmi_post_disable;
> --
> 1.8.3.2
>
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