[Intel-gfx] [PATCH 2/4] drm/i915: Introduce .set_signal_levels() vfunc
Souza, Jose
jose.souza at intel.com
Tue Apr 21 19:15:02 UTC 2020
On Mon, 2020-04-20 at 23:06 +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Sort out some of the mess between intel_ddi.c intel_dp.c by
> introducing a .set_signal_levels() vfunc.
Reviewed-by: José Roberto de Souza <jose.souza at intel.com>
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_ddi.c | 81 +++++++---
> .../drm/i915/display/intel_display_types.h | 1 +
> drivers/gpu/drm/i915/display/intel_dp.c | 146 +++++++++++-----
> --
> 3 files changed, 150 insertions(+), 78 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> b/drivers/gpu/drm/i915/display/intel_ddi.c
> index 7c223520ad6b..eb420069a469 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -2659,38 +2659,66 @@ static u32 intel_ddi_dp_level(struct intel_dp
> *intel_dp)
> return translate_signal_level(signal_levels);
> }
>
> -u32 bxt_signal_levels(struct intel_dp *intel_dp)
> +static void
> +tgl_set_signal_levels(struct intel_dp *intel_dp)
> {
> - struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
> - struct drm_i915_private *dev_priv = to_i915(dport-
> >base.base.dev);
> - struct intel_encoder *encoder = &dport->base;
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)-
> >base;
> int level = intel_ddi_dp_level(intel_dp);
>
> - if (INTEL_GEN(dev_priv) >= 12)
> - tgl_ddi_vswing_sequence(encoder, intel_dp->link_rate,
> - level, encoder->type);
> - else if (INTEL_GEN(dev_priv) >= 11)
> - icl_ddi_vswing_sequence(encoder, intel_dp->link_rate,
> - level, encoder->type);
> - else if (IS_CANNONLAKE(dev_priv))
> - cnl_ddi_vswing_sequence(encoder, level, encoder->type);
> - else
> - bxt_ddi_vswing_sequence(encoder, level, encoder->type);
> -
> - return 0;
> + tgl_ddi_vswing_sequence(encoder, intel_dp->link_rate,
> + level, encoder->type);
> }
>
> -u32 ddi_signal_levels(struct intel_dp *intel_dp)
> +static void
> +icl_set_signal_levels(struct intel_dp *intel_dp)
> {
> - struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
> - struct drm_i915_private *dev_priv = to_i915(dport-
> >base.base.dev);
> - struct intel_encoder *encoder = &dport->base;
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)-
> >base;
> int level = intel_ddi_dp_level(intel_dp);
>
> + icl_ddi_vswing_sequence(encoder, intel_dp->link_rate,
> + level, encoder->type);
> +}
> +
> +static void
> +cnl_set_signal_levels(struct intel_dp *intel_dp)
> +{
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)-
> >base;
> + int level = intel_ddi_dp_level(intel_dp);
> +
> + cnl_ddi_vswing_sequence(encoder, level, encoder->type);
> +}
> +
> +static void
> +bxt_set_signal_levels(struct intel_dp *intel_dp)
> +{
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)-
> >base;
> + int level = intel_ddi_dp_level(intel_dp);
> +
> + bxt_ddi_vswing_sequence(encoder, level, encoder->type);
> +}
> +
> +static void
> +hsw_set_signal_levels(struct intel_dp *intel_dp)
> +{
> + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)-
> >base;
> + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> + int level = intel_ddi_dp_level(intel_dp);
> + enum port port = encoder->port;
> + u32 signal_levels;
> +
> + signal_levels = DDI_BUF_TRANS_SELECT(level);
> +
> + drm_dbg_kms(&dev_priv->drm, "Using signal levels %08x\n",
> + signal_levels);
> +
> + intel_dp->DP &= ~DDI_BUF_EMP_MASK;
> + intel_dp->DP |= signal_levels;
> +
> if (IS_GEN9_BC(dev_priv))
> skl_ddi_set_iboost(encoder, level, encoder->type);
>
> - return DDI_BUF_TRANS_SELECT(level);
> + intel_de_write(dev_priv, DDI_BUF_CTL(port), intel_dp->DP);
> + intel_de_posting_read(dev_priv, DDI_BUF_CTL(port));
> }
>
> static inline
> @@ -4435,6 +4463,17 @@ intel_ddi_init_dp_connector(struct
> intel_digital_port *intel_dig_port)
> intel_ddi_prepare_link_retrain;
> intel_dig_port->dp.set_link_train = intel_ddi_set_link_train;
>
> + if (INTEL_GEN(dev_priv) >= 12)
> + intel_dig_port->dp.set_signal_levels =
> tgl_set_signal_levels;
> + else if (INTEL_GEN(dev_priv) >= 11)
> + intel_dig_port->dp.set_signal_levels =
> icl_set_signal_levels;
> + else if (IS_CANNONLAKE(dev_priv))
> + intel_dig_port->dp.set_signal_levels =
> cnl_set_signal_levels;
> + else if (IS_GEN9_LP(dev_priv))
> + intel_dig_port->dp.set_signal_levels =
> bxt_set_signal_levels;
> + else
> + intel_dig_port->dp.set_signal_levels =
> hsw_set_signal_levels;
> +
> if (INTEL_GEN(dev_priv) < 12) {
> intel_dig_port->dp.regs.dp_tp_ctl = DP_TP_CTL(port);
> intel_dig_port->dp.regs.dp_tp_status =
> DP_TP_STATUS(port);
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 616850cc66bb..960ba14f01c8 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1369,6 +1369,7 @@ struct intel_dp {
> /* This is called before a link training is starterd */
> void (*prepare_link_retrain)(struct intel_dp *intel_dp);
> void (*set_link_train)(struct intel_dp *intel_dp, u8
> dp_train_pat);
> + void (*set_signal_levels)(struct intel_dp *intel_dp);
>
> /* Displayport compliance testing */
> struct intel_dp_compliance compliance;
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index f120e2881f77..7d5e1e857ba7 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -4033,7 +4033,7 @@ intel_dp_pre_emphasis_max(struct intel_dp
> *intel_dp, u8 voltage_swing)
> }
> }
>
> -static u32 vlv_signal_levels(struct intel_dp *intel_dp)
> +static void vlv_set_signal_levels(struct intel_dp *intel_dp)
> {
> struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)-
> >base;
> unsigned long demph_reg_value, preemph_reg_value,
> @@ -4061,7 +4061,7 @@ static u32 vlv_signal_levels(struct intel_dp
> *intel_dp)
> uniqtranscale_reg_value = 0x5598DA3A;
> break;
> default:
> - return 0;
> + return;
> }
> break;
> case DP_TRAIN_PRE_EMPH_LEVEL_1:
> @@ -4080,7 +4080,7 @@ static u32 vlv_signal_levels(struct intel_dp
> *intel_dp)
> uniqtranscale_reg_value = 0x55ADDA3A;
> break;
> default:
> - return 0;
> + return;
> }
> break;
> case DP_TRAIN_PRE_EMPH_LEVEL_2:
> @@ -4095,7 +4095,7 @@ static u32 vlv_signal_levels(struct intel_dp
> *intel_dp)
> uniqtranscale_reg_value = 0x55ADDA3A;
> break;
> default:
> - return 0;
> + return;
> }
> break;
> case DP_TRAIN_PRE_EMPH_LEVEL_3:
> @@ -4106,20 +4106,18 @@ static u32 vlv_signal_levels(struct intel_dp
> *intel_dp)
> uniqtranscale_reg_value = 0x55ADDA3A;
> break;
> default:
> - return 0;
> + return;
> }
> break;
> default:
> - return 0;
> + return;
> }
>
> vlv_set_phy_signal_level(encoder, demph_reg_value,
> preemph_reg_value,
> uniqtranscale_reg_value, 0);
> -
> - return 0;
> }
>
> -static u32 chv_signal_levels(struct intel_dp *intel_dp)
> +static void chv_set_signal_levels(struct intel_dp *intel_dp)
> {
> struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)-
> >base;
> u32 deemph_reg_value, margin_reg_value;
> @@ -4147,7 +4145,7 @@ static u32 chv_signal_levels(struct intel_dp
> *intel_dp)
> uniq_trans_scale = true;
> break;
> default:
> - return 0;
> + return;
> }
> break;
> case DP_TRAIN_PRE_EMPH_LEVEL_1:
> @@ -4165,7 +4163,7 @@ static u32 chv_signal_levels(struct intel_dp
> *intel_dp)
> margin_reg_value = 154;
> break;
> default:
> - return 0;
> + return;
> }
> break;
> case DP_TRAIN_PRE_EMPH_LEVEL_2:
> @@ -4179,7 +4177,7 @@ static u32 chv_signal_levels(struct intel_dp
> *intel_dp)
> margin_reg_value = 154;
> break;
> default:
> - return 0;
> + return;
> }
> break;
> case DP_TRAIN_PRE_EMPH_LEVEL_3:
> @@ -4189,21 +4187,18 @@ static u32 chv_signal_levels(struct intel_dp
> *intel_dp)
> margin_reg_value = 154;
> break;
> default:
> - return 0;
> + return;
> }
> break;
> default:
> - return 0;
> + return;
> }
>
> chv_set_phy_signal_level(encoder, deemph_reg_value,
> margin_reg_value, uniq_trans_scale);
> -
> - return 0;
> }
>
> -static u32
> -g4x_signal_levels(u8 train_set)
> +static u32 g4x_signal_levels(u8 train_set)
> {
> u32 signal_levels = 0;
>
> @@ -4240,12 +4235,31 @@ g4x_signal_levels(u8 train_set)
> return signal_levels;
> }
>
> +static void
> +g4x_set_signal_levels(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u8 train_set = intel_dp->train_set[0];
> + u32 signal_levels;
> +
> + signal_levels = g4x_signal_levels(train_set);
> +
> + drm_dbg_kms(&dev_priv->drm, "Using signal levels %08x\n",
> + signal_levels);
> +
> + intel_dp->DP &= ~(DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK);
> + intel_dp->DP |= signal_levels;
> +
> + intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP);
> + intel_de_posting_read(dev_priv, intel_dp->output_reg);
> +}
> +
> /* SNB CPU eDP voltage swing and pre-emphasis control */
> -static u32
> -snb_cpu_edp_signal_levels(u8 train_set)
> +static u32 snb_cpu_edp_signal_levels(u8 train_set)
> {
> - int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
> - DP_TRAIN_PRE_EMPHASIS_MASK);
> + u8 signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
> + DP_TRAIN_PRE_EMPHASIS_MASK);
> +
> switch (signal_levels) {
> case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 |
> DP_TRAIN_PRE_EMPH_LEVEL_0:
> case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 |
> DP_TRAIN_PRE_EMPH_LEVEL_0:
> @@ -4268,12 +4282,31 @@ snb_cpu_edp_signal_levels(u8 train_set)
> }
> }
>
> +static void
> +snb_cpu_edp_set_signal_levels(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u8 train_set = intel_dp->train_set[0];
> + u32 signal_levels;
> +
> + signal_levels = snb_cpu_edp_signal_levels(train_set);
> +
> + drm_dbg_kms(&dev_priv->drm, "Using signal levels %08x\n",
> + signal_levels);
> +
> + intel_dp->DP &= ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB;
> + intel_dp->DP |= signal_levels;
> +
> + intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP);
> + intel_de_posting_read(dev_priv, intel_dp->output_reg);
> +}
> +
> /* IVB CPU eDP voltage swing and pre-emphasis control */
> -static u32
> -ivb_cpu_edp_signal_levels(u8 train_set)
> +static u32 ivb_cpu_edp_signal_levels(u8 train_set)
> {
> - int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
> - DP_TRAIN_PRE_EMPHASIS_MASK);
> + u8 signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
> + DP_TRAIN_PRE_EMPHASIS_MASK);
> +
> switch (signal_levels) {
> case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 |
> DP_TRAIN_PRE_EMPH_LEVEL_0:
> return EDP_LINK_TRAIN_400MV_0DB_IVB;
> @@ -4299,38 +4332,29 @@ ivb_cpu_edp_signal_levels(u8 train_set)
> }
> }
>
> -void
> -intel_dp_set_signal_levels(struct intel_dp *intel_dp)
> +static void
> +ivb_cpu_edp_set_signal_levels(struct intel_dp *intel_dp)
> {
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - struct intel_digital_port *intel_dig_port =
> dp_to_dig_port(intel_dp);
> - enum port port = intel_dig_port->base.port;
> - u32 signal_levels, mask = 0;
> u8 train_set = intel_dp->train_set[0];
> + u32 signal_levels;
>
> - if (IS_GEN9_LP(dev_priv) || INTEL_GEN(dev_priv) >= 10) {
> - signal_levels = bxt_signal_levels(intel_dp);
> - } else if (HAS_DDI(dev_priv)) {
> - signal_levels = ddi_signal_levels(intel_dp);
> - mask = DDI_BUF_EMP_MASK;
> - } else if (IS_CHERRYVIEW(dev_priv)) {
> - signal_levels = chv_signal_levels(intel_dp);
> - } else if (IS_VALLEYVIEW(dev_priv)) {
> - signal_levels = vlv_signal_levels(intel_dp);
> - } else if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) {
> - signal_levels = ivb_cpu_edp_signal_levels(train_set);
> - mask = EDP_LINK_TRAIN_VOL_EMP_MASK_IVB;
> - } else if (IS_GEN(dev_priv, 6) && port == PORT_A) {
> - signal_levels = snb_cpu_edp_signal_levels(train_set);
> - mask = EDP_LINK_TRAIN_VOL_EMP_MASK_SNB;
> - } else {
> - signal_levels = g4x_signal_levels(train_set);
> - mask = DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK;
> - }
> + signal_levels = ivb_cpu_edp_signal_levels(train_set);
>
> - if (mask)
> - drm_dbg_kms(&dev_priv->drm, "Using signal levels
> %08x\n",
> - signal_levels);
> + drm_dbg_kms(&dev_priv->drm, "Using signal levels %08x\n",
> + signal_levels);
> +
> + intel_dp->DP &= ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB;
> + intel_dp->DP |= signal_levels;
> +
> + intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP);
> + intel_de_posting_read(dev_priv, intel_dp->output_reg);
> +}
> +
> +void intel_dp_set_signal_levels(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u8 train_set = intel_dp->train_set[0];
>
> drm_dbg_kms(&dev_priv->drm, "Using vswing level %d%s\n",
> train_set & DP_TRAIN_VOLTAGE_SWING_MASK,
> @@ -4341,10 +4365,7 @@ intel_dp_set_signal_levels(struct intel_dp
> *intel_dp)
> train_set & DP_TRAIN_MAX_PRE_EMPHASIS_REACHED ?
> " (max)" : "");
>
> - intel_dp->DP = (intel_dp->DP & ~mask) | signal_levels;
> -
> - intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP);
> - intel_de_posting_read(dev_priv, intel_dp->output_reg);
> + intel_dp->set_signal_levels(intel_dp);
> }
>
> void
> @@ -8515,6 +8536,17 @@ bool intel_dp_init(struct drm_i915_private
> *dev_priv,
> else
> intel_dig_port->dp.set_link_train = g4x_set_link_train;
>
> + if (IS_CHERRYVIEW(dev_priv))
> + intel_dig_port->dp.set_signal_levels =
> chv_set_signal_levels;
> + else if (IS_VALLEYVIEW(dev_priv))
> + intel_dig_port->dp.set_signal_levels =
> vlv_set_signal_levels;
> + else if (IS_IVYBRIDGE(dev_priv) && port == PORT_A)
> + intel_dig_port->dp.set_signal_levels =
> ivb_cpu_edp_set_signal_levels;
> + else if (IS_GEN(dev_priv, 6) && port == PORT_A)
> + intel_dig_port->dp.set_signal_levels =
> snb_cpu_edp_set_signal_levels;
> + else
> + intel_dig_port->dp.set_signal_levels =
> g4x_set_signal_levels;
> +
> intel_dig_port->dp.output_reg = output_reg;
> intel_dig_port->max_lanes = 4;
> intel_dig_port->dp.regs.dp_tp_ctl = DP_TP_CTL(port);
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