[Intel-gfx] [PATCH 1/4] drm/i915: Introduce .set_link_train() vfunc
Souza, Jose
jose.souza at intel.com
Mon Apr 20 22:29:34 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_link_train() 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 | 42 +++++
> .../drm/i915/display/intel_display_types.h | 1 +
> drivers/gpu/drm/i915/display/intel_dp.c | 148 ++++++++------
> ----
> 3 files changed, 107 insertions(+), 84 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> b/drivers/gpu/drm/i915/display/intel_ddi.c
> index 74bc489e6dd6..7c223520ad6b 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -3949,6 +3949,46 @@ static void
> intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
> udelay(600);
> }
>
> +static void intel_ddi_set_link_train(struct intel_dp *intel_dp,
> + u8 dp_train_pat)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u8 train_pat_mask = drm_dp_training_pattern_mask(intel_dp-
> >dpcd);
> + enum port port = dp_to_dig_port(intel_dp)->base.port;
> + u32 temp;
> +
> + temp = intel_de_read(dev_priv, intel_dp->regs.dp_tp_ctl);
> +
> + if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
> + temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
> + else
> + temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE;
> +
> + temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
> + switch (dp_train_pat & train_pat_mask) {
> + case DP_TRAINING_PATTERN_DISABLE:
> + temp |= DP_TP_CTL_LINK_TRAIN_NORMAL;
> + break;
> + case DP_TRAINING_PATTERN_1:
> + temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
> + break;
> + case DP_TRAINING_PATTERN_2:
> + temp |= DP_TP_CTL_LINK_TRAIN_PAT2;
> + break;
> + case DP_TRAINING_PATTERN_3:
> + temp |= DP_TP_CTL_LINK_TRAIN_PAT3;
> + break;
> + case DP_TRAINING_PATTERN_4:
> + temp |= DP_TP_CTL_LINK_TRAIN_PAT4;
> + break;
> + }
> +
> + intel_de_write(dev_priv, intel_dp->regs.dp_tp_ctl, temp);
> +
> + intel_de_write(dev_priv, DDI_BUF_CTL(port), intel_dp->DP);
> + intel_de_posting_read(dev_priv, DDI_BUF_CTL(port));
> +}
> +
> static bool intel_ddi_is_audio_enabled(struct drm_i915_private
> *dev_priv,
> enum transcoder cpu_transcoder)
> {
> @@ -4393,6 +4433,8 @@ intel_ddi_init_dp_connector(struct
> intel_digital_port *intel_dig_port)
> intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);
> intel_dig_port->dp.prepare_link_retrain =
> 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.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 ba8c08145c88..616850cc66bb 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1368,6 +1368,7 @@ 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);
>
> /* 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 ec1157858ac5..f120e2881f77 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -3638,90 +3638,63 @@ static void chv_post_disable_dp(struct
> intel_atomic_state *state,
> }
>
> static void
> -_intel_dp_set_link_train(struct intel_dp *intel_dp,
> - u32 *DP,
> - u8 dp_train_pat)
> +cpt_set_link_train(struct intel_dp *intel_dp,
> + u8 dp_train_pat)
> {
> 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;
> - u8 train_pat_mask = drm_dp_training_pattern_mask(intel_dp-
> >dpcd);
> -
> - if (dp_train_pat & train_pat_mask)
> + u32 *DP = &intel_dp->DP;
> +
> + *DP &= ~DP_LINK_TRAIN_MASK_CPT;
> +
> + switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
> + case DP_TRAINING_PATTERN_DISABLE:
> + *DP |= DP_LINK_TRAIN_OFF_CPT;
> + break;
> + case DP_TRAINING_PATTERN_1:
> + *DP |= DP_LINK_TRAIN_PAT_1_CPT;
> + break;
> + case DP_TRAINING_PATTERN_2:
> + *DP |= DP_LINK_TRAIN_PAT_2_CPT;
> + break;
> + case DP_TRAINING_PATTERN_3:
> drm_dbg_kms(&dev_priv->drm,
> - "Using DP training pattern TPS%d\n",
> - dp_train_pat & train_pat_mask);
> -
> - if (HAS_DDI(dev_priv)) {
> - u32 temp = intel_de_read(dev_priv, intel_dp-
> >regs.dp_tp_ctl);
> -
> - if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
> - temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
> - else
> - temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE;
> -
> - temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
> - switch (dp_train_pat & train_pat_mask) {
> - case DP_TRAINING_PATTERN_DISABLE:
> - temp |= DP_TP_CTL_LINK_TRAIN_NORMAL;
> -
> - break;
> - case DP_TRAINING_PATTERN_1:
> - temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
> - break;
> - case DP_TRAINING_PATTERN_2:
> - temp |= DP_TP_CTL_LINK_TRAIN_PAT2;
> - break;
> - case DP_TRAINING_PATTERN_3:
> - temp |= DP_TP_CTL_LINK_TRAIN_PAT3;
> - break;
> - case DP_TRAINING_PATTERN_4:
> - temp |= DP_TP_CTL_LINK_TRAIN_PAT4;
> - break;
> - }
> - intel_de_write(dev_priv, intel_dp->regs.dp_tp_ctl,
> temp);
> -
> - } else if ((IS_IVYBRIDGE(dev_priv) && port == PORT_A) ||
> - (HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
> - *DP &= ~DP_LINK_TRAIN_MASK_CPT;
> -
> - switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
> - case DP_TRAINING_PATTERN_DISABLE:
> - *DP |= DP_LINK_TRAIN_OFF_CPT;
> - break;
> - case DP_TRAINING_PATTERN_1:
> - *DP |= DP_LINK_TRAIN_PAT_1_CPT;
> - break;
> - case DP_TRAINING_PATTERN_2:
> - *DP |= DP_LINK_TRAIN_PAT_2_CPT;
> - break;
> - case DP_TRAINING_PATTERN_3:
> - drm_dbg_kms(&dev_priv->drm,
> - "TPS3 not supported, using TPS2
> instead\n");
> - *DP |= DP_LINK_TRAIN_PAT_2_CPT;
> - break;
> - }
> + "TPS3 not supported, using TPS2
> instead\n");
> + *DP |= DP_LINK_TRAIN_PAT_2_CPT;
> + break;
> + }
>
> - } else {
> - *DP &= ~DP_LINK_TRAIN_MASK;
> + intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP);
> + intel_de_posting_read(dev_priv, intel_dp->output_reg);
> +}
>
> - switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
> - case DP_TRAINING_PATTERN_DISABLE:
> - *DP |= DP_LINK_TRAIN_OFF;
> - break;
> - case DP_TRAINING_PATTERN_1:
> - *DP |= DP_LINK_TRAIN_PAT_1;
> - break;
> - case DP_TRAINING_PATTERN_2:
> - *DP |= DP_LINK_TRAIN_PAT_2;
> - break;
> - case DP_TRAINING_PATTERN_3:
> - drm_dbg_kms(&dev_priv->drm,
> - "TPS3 not supported, using TPS2
> instead\n");
> - *DP |= DP_LINK_TRAIN_PAT_2;
> - break;
> - }
> +static void
> +g4x_set_link_train(struct intel_dp *intel_dp,
> + u8 dp_train_pat)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u32 *DP = &intel_dp->DP;
> +
> + *DP &= ~DP_LINK_TRAIN_MASK;
> +
> + switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
> + case DP_TRAINING_PATTERN_DISABLE:
> + *DP |= DP_LINK_TRAIN_OFF;
> + break;
> + case DP_TRAINING_PATTERN_1:
> + *DP |= DP_LINK_TRAIN_PAT_1;
> + break;
> + case DP_TRAINING_PATTERN_2:
> + *DP |= DP_LINK_TRAIN_PAT_2;
> + break;
> + case DP_TRAINING_PATTERN_3:
> + drm_dbg_kms(&dev_priv->drm,
> + "TPS3 not supported, using TPS2
> instead\n");
> + *DP |= DP_LINK_TRAIN_PAT_2;
> + break;
> }
> +
> + intel_de_write(dev_priv, intel_dp->output_reg, intel_dp->DP);
> + intel_de_posting_read(dev_priv, intel_dp->output_reg);
> }
>
> static void intel_dp_enable_port(struct intel_dp *intel_dp,
> @@ -4378,14 +4351,15 @@ void
> intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
> u8 dp_train_pat)
> {
> - struct intel_digital_port *intel_dig_port =
> dp_to_dig_port(intel_dp);
> - struct drm_i915_private *dev_priv =
> - to_i915(intel_dig_port->base.base.dev);
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + u8 train_pat_mask = drm_dp_training_pattern_mask(intel_dp-
> >dpcd);
>
> - _intel_dp_set_link_train(intel_dp, &intel_dp->DP,
> dp_train_pat);
> + if (dp_train_pat & train_pat_mask)
> + drm_dbg_kms(&dev_priv->drm,
> + "Using DP training pattern TPS%d\n",
> + dp_train_pat & train_pat_mask);
>
> - 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_link_train(intel_dp, dp_train_pat);
> }
>
> void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
> @@ -8535,6 +8509,12 @@ bool intel_dp_init(struct drm_i915_private
> *dev_priv,
> intel_encoder->post_disable = g4x_post_disable_dp;
> }
>
> + if ((IS_IVYBRIDGE(dev_priv) && port == PORT_A) ||
> + (HAS_PCH_CPT(dev_priv) && port != PORT_A))
> + intel_dig_port->dp.set_link_train = cpt_set_link_train;
> + else
> + intel_dig_port->dp.set_link_train = g4x_set_link_train;
> +
> 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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