diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 133 |
1 files changed, 93 insertions, 40 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index a4d80314e7f8..e2aced6eec4c 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -50,7 +50,6 @@ 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]; @@ -59,8 +58,6 @@ struct intel_dp { bool is_pch_edp; uint8_t train_set[4]; uint8_t link_status[DP_LINK_STATUS_SIZE]; - - struct drm_property *force_audio_property; }; /** @@ -140,8 +137,8 @@ intel_dp_max_lane_count(struct intel_dp *intel_dp) { int max_lane_count = 4; - if (intel_dp->dpcd[0] >= 0x11) { - max_lane_count = intel_dp->dpcd[2] & 0x1f; + if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) { + max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f; switch (max_lane_count) { case 1: case 2: case 4: break; @@ -155,7 +152,7 @@ intel_dp_max_lane_count(struct intel_dp *intel_dp) static int intel_dp_max_link_bw(struct intel_dp *intel_dp) { - int max_link_bw = intel_dp->dpcd[1]; + int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; switch (max_link_bw) { case DP_LINK_BW_1_62: @@ -776,7 +773,8 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, /* * Check for DPCD version > 1.1 and enhanced framing support */ - if (intel_dp->dpcd[0] >= 0x11 && (intel_dp->dpcd[2] & DP_ENHANCED_FRAME_CAP)) { + if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && + (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; intel_dp->DP |= DP_ENHANCED_FRAMING; } @@ -944,11 +942,44 @@ static void ironlake_edp_pll_off(struct drm_encoder *encoder) udelay(200); } +/* If the sink supports it, try to set the power state appropriately */ +static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) +{ + int ret, i; + + /* Should have a valid DPCD by this point */ + if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) + return; + + if (mode != DRM_MODE_DPMS_ON) { + ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, + DP_SET_POWER_D3); + if (ret != 1) + DRM_DEBUG_DRIVER("failed to write sink power state\n"); + } else { + /* + * When turning on, we need to retry for 1ms to give the sink + * time to wake up. + */ + for (i = 0; i < 3; i++) { + ret = intel_dp_aux_native_write_1(intel_dp, + DP_SET_POWER, + DP_SET_POWER_D0); + if (ret == 1) + break; + msleep(1); + } + } +} + static void intel_dp_prepare(struct drm_encoder *encoder) { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); struct drm_device *dev = encoder->dev; + /* Wake up the sink first */ + intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); + if (is_edp(intel_dp)) { ironlake_edp_backlight_off(dev); ironlake_edp_panel_off(dev); @@ -992,6 +1023,7 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) if (mode != DRM_MODE_DPMS_ON) { if (is_edp(intel_dp)) ironlake_edp_backlight_off(dev); + intel_dp_sink_dpms(intel_dp, mode); intel_dp_link_down(intel_dp); if (is_edp(intel_dp)) ironlake_edp_panel_off(dev); @@ -1000,6 +1032,7 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) } else { if (is_edp(intel_dp)) ironlake_edp_panel_vdd_on(intel_dp); + intel_dp_sink_dpms(intel_dp, mode); if (!(dp_reg & DP_PORT_EN)) { intel_dp_start_link_train(intel_dp); if (is_edp(intel_dp)) { @@ -1011,7 +1044,31 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) if (is_edp(intel_dp)) ironlake_edp_backlight_on(dev); } - intel_dp->dpms_mode = mode; +} + +/* + * Native read with retry for link status and receiver capability reads for + * cases where the sink may still be asleep. + */ +static bool +intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, + uint8_t *recv, int recv_bytes) +{ + int ret, i; + + /* + * Sinks are *supposed* to come up within 1ms from an off state, + * but we're also supposed to retry 3 times per the spec. + */ + for (i = 0; i < 3; i++) { + ret = intel_dp_aux_native_read(intel_dp, address, recv, + recv_bytes); + if (ret == recv_bytes) + return true; + msleep(1); + } + + return false; } /* @@ -1021,14 +1078,10 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) static bool intel_dp_get_link_status(struct intel_dp *intel_dp) { - int ret; - - ret = intel_dp_aux_native_read(intel_dp, - DP_LANE0_1_STATUS, - intel_dp->link_status, DP_LINK_STATUS_SIZE); - if (ret != DP_LINK_STATUS_SIZE) - return false; - return true; + return intel_dp_aux_native_read_retry(intel_dp, + DP_LANE0_1_STATUS, + intel_dp->link_status, + DP_LINK_STATUS_SIZE); } static uint8_t @@ -1517,6 +1570,8 @@ 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->base.base.crtc) return; @@ -1525,6 +1580,15 @@ intel_dp_check_link_status(struct intel_dp *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)) { + intel_dp_link_down(intel_dp); + return; + } + if (!intel_channel_eq_ok(intel_dp)) { intel_dp_start_link_train(intel_dp); intel_dp_complete_link_train(intel_dp); @@ -1535,6 +1599,7 @@ 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)) { @@ -1545,13 +1610,11 @@ ironlake_dp_detect(struct intel_dp *intel_dp) } 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[0] != 0) - status = connector_status_connected; - } + 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; @@ -1588,7 +1651,7 @@ g4x_dp_detect(struct intel_dp *intel_dp) if (intel_dp_aux_native_read(intel_dp, 0x000, intel_dp->dpcd, sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd)) { - if (intel_dp->dpcd[0] != 0) + if (intel_dp->dpcd[DP_DPCD_REV] != 0) status = connector_status_connected; } @@ -1702,7 +1765,7 @@ intel_dp_set_property(struct drm_connector *connector, if (ret) return ret; - if (property == intel_dp->force_audio_property) { + if (property == dev_priv->force_audio_property) { int i = val; bool has_audio; @@ -1792,8 +1855,7 @@ intel_dp_hot_plug(struct intel_encoder *intel_encoder) { struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); - if (intel_dp->dpms_mode == DRM_MODE_DPMS_ON) - intel_dp_check_link_status(intel_dp); + intel_dp_check_link_status(intel_dp); } /* Return which DP Port should be selected for Transcoder DP control */ @@ -1841,16 +1903,7 @@ bool intel_dpd_is_edp(struct drm_device *dev) static void intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) { - struct drm_device *dev = connector->dev; - - intel_dp->force_audio_property = - drm_property_create(dev, DRM_MODE_PROP_RANGE, "force_audio", 2); - if (intel_dp->force_audio_property) { - intel_dp->force_audio_property->values[0] = -1; - intel_dp->force_audio_property->values[1] = 1; - drm_connector_attach_property(connector, intel_dp->force_audio_property, 0); - } - + intel_attach_force_audio_property(connector); intel_attach_broadcast_rgb_property(connector); } @@ -1870,7 +1923,6 @@ 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) { @@ -1965,8 +2017,9 @@ intel_dp_init(struct drm_device *dev, int output_reg) sizeof(intel_dp->dpcd)); ironlake_edp_panel_vdd_off(intel_dp); if (ret == sizeof(intel_dp->dpcd)) { - if (intel_dp->dpcd[0] >= 0x11) - dev_priv->no_aux_handshake = intel_dp->dpcd[3] & + if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) + dev_priv->no_aux_handshake = + intel_dp->dpcd[DP_MAX_DOWNSPREAD] & DP_NO_AUX_HANDSHAKE_LINK_TRAINING; } else { /* if this fails, presume the device is a ghost */ |