From 901c2daf05c8ae6c3f85370fc96b9b6892f5da2d Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 17 Aug 2015 18:05:12 +0300 Subject: [PATCH] drm/i915: Put back lane_count into intel_dp and add link_rate too MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit With MST there won't be a crtc assigned to the main link encoder, so trying to dig up the pipe_config from there is a recipe for an oops. Instead store the parameters (lane_count and link_rate) in the encoder, and use those values during link training etc. Since those parameters are now assigned only when the link is actually enabled, .compute_config() won't clobber them as it did before. Hardware state readout is still bonkers though as we don't transfer the link parameters from pipe_config intel_dp. We should do that during encoder sanitation. But since we don't even do a proper job of reading out the main link encoder state for MST there's littel point in worrying about this now. Fixes a regression with MST caused by: commit 90a6b7b052b1aa17fbb98b049e9c8b7f729c35a7 Author: Ville Syrjälä Date: Mon Jul 6 16:39:15 2015 +0300 drm/i915: Move intel_dp->lane_count into pipe_config v2: Different apporoach that should keep intel_dp_check_mst_status() somewhat less oopsy Cc: Maarten Lankhorst Reported-by: Maarten Lankhorst Signed-off-by: Ville Syrjälä Tested-by: Maarten Lankhorst Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_ddi.c | 5 +-- drivers/gpu/drm/i915/intel_dp.c | 53 +++++++++++++---------------- drivers/gpu/drm/i915/intel_dp_mst.c | 2 ++ drivers/gpu/drm/i915/intel_drv.h | 4 +++ 4 files changed, 33 insertions(+), 31 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 56d778f00460..5dff8b7e0f03 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -728,11 +728,10 @@ void intel_ddi_init_dp_buf_reg(struct intel_encoder *encoder) struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); struct intel_digital_port *intel_dig_port = enc_to_dig_port(&encoder->base); - struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc); intel_dp->DP = intel_dig_port->saved_port_bits | DDI_BUF_CTL_ENABLE | DDI_BUF_TRANS_SELECT(0); - intel_dp->DP |= DDI_PORT_WIDTH(crtc->config->lane_count); + intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count); } static struct intel_encoder * @@ -2314,6 +2313,8 @@ static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder) if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + intel_dp_set_link_params(intel_dp, crtc->config); + intel_ddi_init_dp_buf_reg(intel_encoder); intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index b905c19e11a1..dcda86a7d68d 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1584,6 +1584,13 @@ static void ironlake_set_pll_cpu_edp(struct intel_dp *intel_dp) udelay(500); } +void intel_dp_set_link_params(struct intel_dp *intel_dp, + const struct intel_crtc_state *pipe_config) +{ + intel_dp->link_rate = pipe_config->port_clock; + intel_dp->lane_count = pipe_config->lane_count; +} + static void intel_dp_prepare(struct intel_encoder *encoder) { struct drm_device *dev = encoder->base.dev; @@ -1593,6 +1600,8 @@ static void intel_dp_prepare(struct intel_encoder *encoder) struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc); struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode; + intel_dp_set_link_params(intel_dp, crtc->config); + /* * There are four kinds of DP registers: * @@ -3348,15 +3357,13 @@ static void intel_get_adjust_train(struct intel_dp *intel_dp, const uint8_t link_status[DP_LINK_STATUS_SIZE]) { - struct intel_crtc *crtc = - to_intel_crtc(dp_to_dig_port(intel_dp)->base.base.crtc); uint8_t v = 0; uint8_t p = 0; int lane; uint8_t voltage_max; uint8_t preemph_max; - for (lane = 0; lane < crtc->config->lane_count; lane++) { + for (lane = 0; lane < intel_dp->lane_count; lane++) { uint8_t this_v = drm_dp_get_adjust_request_voltage(link_status, lane); uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane); @@ -3527,8 +3534,6 @@ intel_dp_set_link_train(struct intel_dp *intel_dp, 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 intel_crtc *crtc = - to_intel_crtc(intel_dig_port->base.base.crtc); uint8_t buf[sizeof(intel_dp->train_set) + 1]; int ret, len; @@ -3544,8 +3549,8 @@ intel_dp_set_link_train(struct intel_dp *intel_dp, len = 1; } else { /* DP_TRAINING_LANEx_SET follow DP_TRAINING_PATTERN_SET */ - memcpy(buf + 1, intel_dp->train_set, crtc->config->lane_count); - len = crtc->config->lane_count + 1; + memcpy(buf + 1, intel_dp->train_set, intel_dp->lane_count); + len = intel_dp->lane_count + 1; } ret = drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_PATTERN_SET, @@ -3571,8 +3576,6 @@ intel_dp_update_link_train(struct intel_dp *intel_dp, uint32_t *DP, 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 intel_crtc *crtc = - to_intel_crtc(intel_dig_port->base.base.crtc); int ret; intel_get_adjust_train(intel_dp, link_status); @@ -3582,9 +3585,9 @@ intel_dp_update_link_train(struct intel_dp *intel_dp, uint32_t *DP, POSTING_READ(intel_dp->output_reg); ret = drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_LANE0_SET, - intel_dp->train_set, crtc->config->lane_count); + intel_dp->train_set, intel_dp->lane_count); - return ret == crtc->config->lane_count; + return ret == intel_dp->lane_count; } static void intel_dp_set_idle_link_train(struct intel_dp *intel_dp) @@ -3623,8 +3626,6 @@ void intel_dp_start_link_train(struct intel_dp *intel_dp) { struct drm_encoder *encoder = &dp_to_dig_port(intel_dp)->base.base; - struct intel_crtc *crtc = - to_intel_crtc(dp_to_dig_port(intel_dp)->base.base.crtc); struct drm_device *dev = encoder->dev; int i; uint8_t voltage; @@ -3636,12 +3637,12 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) if (HAS_DDI(dev)) intel_ddi_prepare_link_retrain(encoder); - intel_dp_compute_rate(intel_dp, crtc->config->port_clock, + intel_dp_compute_rate(intel_dp, intel_dp->link_rate, &link_bw, &rate_select); /* Write the link configuration data */ link_config[0] = link_bw; - link_config[1] = crtc->config->lane_count; + link_config[1] = intel_dp->lane_count; if (drm_dp_enhanced_frame_cap(intel_dp->dpcd)) link_config[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; drm_dp_dpcd_write(&intel_dp->aux, DP_LINK_BW_SET, link_config, 2); @@ -3675,7 +3676,7 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) break; } - if (drm_dp_clock_recovery_ok(link_status, crtc->config->lane_count)) { + if (drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { DRM_DEBUG_KMS("clock recovery OK\n"); break; } @@ -3698,10 +3699,10 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) } /* Check to see if we've tried the max voltage */ - for (i = 0; i < crtc->config->lane_count; i++) + for (i = 0; i < intel_dp->lane_count; i++) if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) break; - if (i == crtc->config->lane_count) { + if (i == intel_dp->lane_count) { ++loop_tries; if (loop_tries == 5) { DRM_ERROR("too many full retries, give up\n"); @@ -3738,15 +3739,13 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) void intel_dp_complete_link_train(struct intel_dp *intel_dp) { - struct intel_crtc *crtc = - to_intel_crtc(dp_to_dig_port(intel_dp)->base.base.crtc); bool channel_eq = false; int tries, cr_tries; uint32_t DP = intel_dp->DP; uint32_t training_pattern = DP_TRAINING_PATTERN_2; /* Training Pattern 3 for HBR2 or 1.2 devices that support it*/ - if (crtc->config->port_clock == 540000 || intel_dp->use_tps3) + if (intel_dp->link_rate == 540000 || intel_dp->use_tps3) training_pattern = DP_TRAINING_PATTERN_3; /* channel equalization */ @@ -3776,7 +3775,7 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp) /* Make sure clock is still ok */ if (!drm_dp_clock_recovery_ok(link_status, - crtc->config->lane_count)) { + intel_dp->lane_count)) { intel_dp->train_set_valid = false; intel_dp_start_link_train(intel_dp); intel_dp_set_link_train(intel_dp, &DP, @@ -3787,7 +3786,7 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp) } if (drm_dp_channel_eq_ok(link_status, - crtc->config->lane_count)) { + intel_dp->lane_count)) { channel_eq = true; break; } @@ -4285,8 +4284,6 @@ update_status: static int intel_dp_check_mst_status(struct intel_dp *intel_dp) { - struct intel_crtc *crtc = - to_intel_crtc(dp_to_dig_port(intel_dp)->base.base.crtc); bool bret; if (intel_dp->is_mst) { @@ -4300,7 +4297,7 @@ go_again: /* check link status - esi[10] = 0x200c */ if (intel_dp->active_mst_links && - !drm_dp_channel_eq_ok(&esi[10], crtc->config->lane_count)) { + !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) { DRM_DEBUG_KMS("channel EQ not ok, retraining\n"); intel_dp_start_link_train(intel_dp); intel_dp_complete_link_train(intel_dp); @@ -4355,8 +4352,6 @@ intel_dp_check_link_status(struct intel_dp *intel_dp) { struct drm_device *dev = intel_dp_to_dev(intel_dp); struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base; - struct intel_crtc *crtc = - to_intel_crtc(dp_to_dig_port(intel_dp)->base.base.crtc); u8 sink_irq_vector; u8 link_status[DP_LINK_STATUS_SIZE]; @@ -4392,7 +4387,7 @@ intel_dp_check_link_status(struct intel_dp *intel_dp) DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); } - if (!drm_dp_channel_eq_ok(link_status, crtc->config->lane_count)) { + if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", intel_encoder->base.name); intel_dp_start_link_train(intel_dp); diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c index 1dd2b373c054..dd291d123219 100644 --- a/drivers/gpu/drm/i915/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/intel_dp_mst.c @@ -165,6 +165,8 @@ static void intel_mst_pre_enable_dp(struct intel_encoder *encoder) if (intel_dp->active_mst_links == 0) { enum port port = intel_ddi_get_encoder_port(encoder); + intel_dp_set_link_params(intel_dp, intel_crtc->config); + /* FIXME: add support for SKL */ if (INTEL_INFO(dev)->gen < 9) I915_WRITE(PORT_CLK_SEL(port), diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 22dc8b6b4198..8383442b6fa0 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -708,6 +708,8 @@ struct intel_dp { uint32_t output_reg; uint32_t aux_ch_ctl_reg; uint32_t DP; + int link_rate; + uint8_t lane_count; bool has_audio; enum hdmi_force_audio force_audio; bool limited_color_range; @@ -1161,6 +1163,8 @@ void assert_csr_loaded(struct drm_i915_private *dev_priv); void intel_dp_init(struct drm_device *dev, int output_reg, enum port port); bool intel_dp_init_connector(struct intel_digital_port *intel_dig_port, struct intel_connector *intel_connector); +void intel_dp_set_link_params(struct intel_dp *intel_dp, + const struct intel_crtc_state *pipe_config); void intel_dp_start_link_train(struct intel_dp *intel_dp); void intel_dp_complete_link_train(struct intel_dp *intel_dp); void intel_dp_stop_link_train(struct intel_dp *intel_dp); -- 2.34.1