diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 135 |
1 files changed, 86 insertions, 49 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index e2aced6eec4c..44fef5e1c490 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -50,9 +50,10 @@ struct intel_dp { bool has_audio; int force_audio; uint32_t color_range; + int dpms_mode; uint8_t link_bw; uint8_t lane_count; - uint8_t dpcd[4]; + uint8_t dpcd[8]; struct i2c_adapter adapter; struct i2c_algo_dp_aux_data algo; bool is_pch_edp; @@ -178,12 +179,14 @@ intel_dp_link_clock(uint8_t link_bw) static int intel_dp_link_required(struct drm_device *dev, struct intel_dp *intel_dp, int pixel_clock) { - struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_crtc *crtc = intel_dp->base.base.crtc; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + int bpp = 24; - if (is_edp(intel_dp)) - return (pixel_clock * dev_priv->edp.bpp + 7) / 8; - else - return pixel_clock * 3; + if (intel_crtc) + bpp = intel_crtc->bpp; + + return (pixel_clock * bpp + 7) / 8; } static int @@ -314,9 +317,17 @@ intel_dp_aux_ch(struct intel_dp *intel_dp, else precharge = 5; - if (I915_READ(ch_ctl) & DP_AUX_CH_CTL_SEND_BUSY) { - DRM_ERROR("dp_aux_ch not started status 0x%08x\n", - I915_READ(ch_ctl)); + /* Try to wait for any previous AUX channel activity */ + for (try = 0; try < 3; try++) { + status = I915_READ(ch_ctl); + if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) + break; + msleep(1); + } + + if (try == 3) { + WARN(1, "dp_aux_ch not started status 0x%08x\n", + I915_READ(ch_ctl)); return -EBUSY; } @@ -681,7 +692,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, struct drm_encoder *encoder; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - int lane_count = 4, bpp = 24; + int lane_count = 4; struct intel_dp_m_n m_n; int pipe = intel_crtc->pipe; @@ -700,7 +711,6 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, break; } else if (is_edp(intel_dp)) { lane_count = dev_priv->edp.lanes; - bpp = dev_priv->edp.bpp; break; } } @@ -710,7 +720,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, * the number of bytes_per_pixel post-LUT, which we always * set up for 8-bits of R/G/B, or 3 bytes total. */ - intel_dp_compute_m_n(bpp, lane_count, + intel_dp_compute_m_n(intel_crtc->bpp, lane_count, mode->clock, adjusted_mode->clock, &m_n); if (HAS_PCH_SPLIT(dev)) { @@ -769,6 +779,7 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); intel_dp->link_configuration[0] = intel_dp->link_bw; intel_dp->link_configuration[1] = intel_dp->lane_count; + intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; /* * Check for DPCD version > 1.1 and enhanced framing support @@ -1010,6 +1021,8 @@ static void intel_dp_commit(struct drm_encoder *encoder) if (is_edp(intel_dp)) ironlake_edp_backlight_on(dev); + + intel_dp->dpms_mode = DRM_MODE_DPMS_ON; } static void @@ -1044,6 +1057,7 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) if (is_edp(intel_dp)) ironlake_edp_backlight_on(dev); } + intel_dp->dpms_mode = mode; } /* @@ -1333,10 +1347,16 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) u32 reg; uint32_t DP = intel_dp->DP; - /* Enable output, wait for it to become active */ - I915_WRITE(intel_dp->output_reg, intel_dp->DP); - POSTING_READ(intel_dp->output_reg); - intel_wait_for_vblank(dev, intel_crtc->pipe); + /* + * On CPT we have to enable the port in training pattern 1, which + * will happen below in intel_dp_set_link_train. Otherwise, enable + * the port and wait for it to become active. + */ + if (!HAS_PCH_CPT(dev)) { + I915_WRITE(intel_dp->output_reg, intel_dp->DP); + POSTING_READ(intel_dp->output_reg); + intel_wait_for_vblank(dev, intel_crtc->pipe); + } /* Write the link configuration data */ intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, @@ -1369,7 +1389,8 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) reg = DP | DP_LINK_TRAIN_PAT_1; if (!intel_dp_set_link_train(intel_dp, reg, - DP_TRAINING_PATTERN_1)) + DP_TRAINING_PATTERN_1 | + DP_LINK_SCRAMBLING_DISABLE)) break; /* Set training pattern 1 */ @@ -1444,7 +1465,8 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp) /* channel eq pattern */ if (!intel_dp_set_link_train(intel_dp, reg, - DP_TRAINING_PATTERN_2)) + DP_TRAINING_PATTERN_2 | + DP_LINK_SCRAMBLING_DISABLE)) break; udelay(400); @@ -1558,6 +1580,18 @@ intel_dp_link_down(struct intel_dp *intel_dp) POSTING_READ(intel_dp->output_reg); } +static bool +intel_dp_get_dpcd(struct intel_dp *intel_dp) +{ + if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, + sizeof (intel_dp->dpcd)) && + (intel_dp->dpcd[DP_DPCD_REV] != 0)) { + return true; + } + + return false; +} + /* * According to DP spec * 5.1.2: @@ -1570,36 +1604,44 @@ intel_dp_link_down(struct intel_dp *intel_dp) static void intel_dp_check_link_status(struct intel_dp *intel_dp) { - int ret; + if (intel_dp->dpms_mode != DRM_MODE_DPMS_ON) + return; if (!intel_dp->base.base.crtc) return; + /* Try to read receiver status if the link appears to be up */ if (!intel_dp_get_link_status(intel_dp)) { intel_dp_link_down(intel_dp); return; } - /* Try to read receiver status if the link appears to be up */ - ret = intel_dp_aux_native_read(intel_dp, - 0x000, intel_dp->dpcd, - sizeof (intel_dp->dpcd)); - if (ret != sizeof(intel_dp->dpcd)) { + /* Now read the DPCD to see if it's actually running */ + if (!intel_dp_get_dpcd(intel_dp)) { intel_dp_link_down(intel_dp); return; } if (!intel_channel_eq_ok(intel_dp)) { + DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", + drm_get_encoder_name(&intel_dp->base.base)); intel_dp_start_link_train(intel_dp); intel_dp_complete_link_train(intel_dp); } } static enum drm_connector_status +intel_dp_detect_dpcd(struct intel_dp *intel_dp) +{ + if (intel_dp_get_dpcd(intel_dp)) + return connector_status_connected; + return connector_status_disconnected; +} + +static enum drm_connector_status ironlake_dp_detect(struct intel_dp *intel_dp) { enum drm_connector_status status; - bool ret; /* Can't disconnect eDP, but you can close the lid... */ if (is_edp(intel_dp)) { @@ -1609,15 +1651,7 @@ ironlake_dp_detect(struct intel_dp *intel_dp) return status; } - status = connector_status_disconnected; - ret = intel_dp_aux_native_read_retry(intel_dp, - 0x000, intel_dp->dpcd, - sizeof (intel_dp->dpcd)); - if (ret && intel_dp->dpcd[DP_DPCD_REV] != 0) - status = connector_status_connected; - DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", intel_dp->dpcd[0], - intel_dp->dpcd[1], intel_dp->dpcd[2], intel_dp->dpcd[3]); - return status; + return intel_dp_detect_dpcd(intel_dp); } static enum drm_connector_status @@ -1625,7 +1659,6 @@ g4x_dp_detect(struct intel_dp *intel_dp) { struct drm_device *dev = intel_dp->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; - enum drm_connector_status status; uint32_t temp, bit; switch (intel_dp->output_reg) { @@ -1647,15 +1680,7 @@ g4x_dp_detect(struct intel_dp *intel_dp) if ((temp & bit) == 0) return connector_status_disconnected; - status = connector_status_disconnected; - if (intel_dp_aux_native_read(intel_dp, 0x000, intel_dp->dpcd, - sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd)) - { - if (intel_dp->dpcd[DP_DPCD_REV] != 0) - status = connector_status_connected; - } - - return status; + return intel_dp_detect_dpcd(intel_dp); } /** @@ -1678,6 +1703,12 @@ intel_dp_detect(struct drm_connector *connector, bool force) status = ironlake_dp_detect(intel_dp); else status = g4x_dp_detect(intel_dp); + + DRM_DEBUG_KMS("DPCD: %02hx%02hx%02hx%02hx%02hx%02hx%02hx%02hx\n", + intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], + intel_dp->dpcd[3], intel_dp->dpcd[4], intel_dp->dpcd[5], + intel_dp->dpcd[6], intel_dp->dpcd[7]); + if (status != connector_status_connected) return status; @@ -1810,6 +1841,11 @@ done: static void intel_dp_destroy (struct drm_connector *connector) { + struct drm_device *dev = connector->dev; + + if (intel_dpd_is_edp(dev)) + intel_panel_destroy_backlight(dev); + drm_sysfs_connector_remove(connector); drm_connector_cleanup(connector); kfree(connector); @@ -1923,6 +1959,7 @@ intel_dp_init(struct drm_device *dev, int output_reg) return; intel_dp->output_reg = output_reg; + intel_dp->dpms_mode = -1; intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); if (!intel_connector) { @@ -1999,7 +2036,7 @@ intel_dp_init(struct drm_device *dev, int output_reg) /* Cache some DPCD data in the eDP case */ if (is_edp(intel_dp)) { - int ret; + bool ret; u32 pp_on, pp_div; pp_on = I915_READ(PCH_PP_ON_DELAYS); @@ -2012,11 +2049,9 @@ intel_dp_init(struct drm_device *dev, int output_reg) dev_priv->panel_t12 *= 100; /* t12 in 100ms units */ ironlake_edp_panel_vdd_on(intel_dp); - ret = intel_dp_aux_native_read(intel_dp, DP_DPCD_REV, - intel_dp->dpcd, - sizeof(intel_dp->dpcd)); + ret = intel_dp_get_dpcd(intel_dp); ironlake_edp_panel_vdd_off(intel_dp); - if (ret == sizeof(intel_dp->dpcd)) { + if (ret) { if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) dev_priv->no_aux_handshake = intel_dp->dpcd[DP_MAX_DOWNSPREAD] & @@ -2042,6 +2077,8 @@ intel_dp_init(struct drm_device *dev, int output_reg) DRM_MODE_TYPE_PREFERRED; } } + dev_priv->int_edp_connector = connector; + intel_panel_setup_backlight(dev); } intel_dp_add_properties(intel_dp, connector); |