diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_ddi.c | 43 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_types.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.c | 19 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 2 |
4 files changed, 61 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 424d59671561..c52ad5ecb645 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -706,6 +706,28 @@ static const struct cnl_ddi_buf_trans tgl_combo_phy_ddi_translations_dp_hbr2[] = { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 900 900 0.0 */ }; +/* + * Cloned the HOBL entry to comply with the voltage and pre-emphasis entries + * that DisplayPort specification requires + */ +static const struct cnl_ddi_buf_trans tgl_combo_phy_ddi_translations_edp_hbr2_hobl[] = { + /* VS pre-emp */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 0 0 */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 0 1 */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 0 2 */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 0 3 */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 1 0 */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 1 1 */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 1 2 */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 2 0 */ + { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 2 1 */ +}; + +static bool is_hobl_buf_trans(const struct cnl_ddi_buf_trans *table) +{ + return table == tgl_combo_phy_ddi_translations_edp_hbr2_hobl; +} + static const struct ddi_buf_trans * bdw_get_buf_trans_edp(struct intel_encoder *encoder, int *n_entries) { @@ -1050,6 +1072,18 @@ static const struct cnl_ddi_buf_trans * tgl_get_combo_buf_trans(struct intel_encoder *encoder, int type, int rate, int *n_entries) { + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + + if (type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.hobl) { + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + + if (!intel_dp->hobl_failed && rate <= 540000) { + /* Same table applies to TGL, RKL and DG1 */ + *n_entries = ARRAY_SIZE(tgl_combo_phy_ddi_translations_edp_hbr2_hobl); + return tgl_combo_phy_ddi_translations_edp_hbr2_hobl; + } + } + if (type == INTEL_OUTPUT_HDMI || type == INTEL_OUTPUT_EDP) { return icl_get_combo_buf_trans(encoder, type, rate, n_entries); } else if (rate > 270000) { @@ -2392,6 +2426,15 @@ static void icl_ddi_combo_vswing_program(struct intel_encoder *encoder, level = n_entries - 1; } + if (type == INTEL_OUTPUT_EDP) { + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + + val = EDP4K2K_MODE_OVRD_EN | EDP4K2K_MODE_OVRD_OPTIMIZED; + intel_dp->hobl_active = is_hobl_buf_trans(ddi_translations); + intel_de_rmw(dev_priv, ICL_PORT_CL_DW10(phy), val, + intel_dp->hobl_active ? val : 0); + } + /* Set PORT_TX_DW5 */ val = intel_de_read(dev_priv, ICL_PORT_TX_DW5_LN0(phy)); val &= ~(SCALING_MODE_SEL_MASK | RTERM_SELECT_MASK | diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index e8f809161c75..f581260e8dbf 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1375,6 +1375,9 @@ struct intel_dp { /* Display stream compression testing */ bool force_dsc_en; + + bool hobl_failed; + bool hobl_active; }; enum lspcon_vendor { diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c index a23ed7290843..f2c8b56be9ea 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -410,10 +410,17 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) intel_connector->base.base.id, intel_connector->base.name, intel_dp->link_rate, intel_dp->lane_count); - if (!intel_dp_get_link_train_fallback_values(intel_dp, - intel_dp->link_rate, - intel_dp->lane_count)) - /* Schedule a Hotplug Uevent to userspace to start modeset */ - schedule_work(&intel_connector->modeset_retry_work); - return; + + if (intel_dp->hobl_active) { + drm_dbg_kms(&dp_to_i915(intel_dp)->drm, + "Link Training failed with HOBL active, not enabling it from now on"); + intel_dp->hobl_failed = true; + } else if (intel_dp_get_link_train_fallback_values(intel_dp, + intel_dp->link_rate, + intel_dp->lane_count)) { + return; + } + + /* Schedule a Hotplug Uevent to userspace to start modeset */ + schedule_work(&intel_connector->modeset_retry_work); } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 4e796ff4d7d0..b9607ac3620d 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1898,6 +1898,8 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg) #define PWR_DOWN_LN_3_1_0 (0xb << 4) #define PWR_DOWN_LN_MASK (0xf << 4) #define PWR_DOWN_LN_SHIFT 4 +#define EDP4K2K_MODE_OVRD_EN (1 << 3) +#define EDP4K2K_MODE_OVRD_OPTIMIZED (1 << 2) #define ICL_PORT_CL_DW12(phy) _MMIO(_ICL_PORT_CL_DW(12, phy)) #define ICL_LANE_ENABLE_AUX (1 << 0) |