From 1857e1daa0695d45b2639ac9e3cfcdaede4a7f8a Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Mon, 29 Apr 2013 19:34:16 +0200 Subject: [PATCH] drm/i915: move fdi lane configuration checks ahead MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This nicely allows us to drop some hacks which have only been used to work around modeset failures due to lack of fdi lanes. v2: Implement proper checking for Haswell platforms - the fdi link to the LPT PCH has only 2 lanes. Note that we already filter out impossible modes in intel_crt_mode_valid. Unfortunately LPT does not support 6bpc on the fdi rx, so we can't pull clever tricks to squeeze in a few more modes. v2: Rebased on top of Ben Widawsky's num_pipes reorg. v3: Rebase on top of Ville's pipe debug output ocd rampage. v4: Fixup rebase fail spotted by Ville. v5: Fixup rebase fail spotted by Imre Deak. I suck. Cc: Imre Deak Cc: Ville Syrjälä Reviewed-by: Imre Deak Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 129 ++++++++++++++------------- 1 file changed, 65 insertions(+), 64 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 1a3fdba4e74d..1d157978f10b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3974,9 +3974,68 @@ bool intel_connector_get_hw_state(struct intel_connector *connector) return encoder->get_hw_state(encoder, &pipe); } -static void ironlake_fdi_compute_config(struct drm_device *dev, +static bool ironlake_check_fdi_lanes(struct drm_device *dev, enum pipe pipe, + struct intel_crtc_config *pipe_config) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *pipe_B_crtc = + to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]); + + DRM_DEBUG_KMS("checking fdi config on pipe %c, lanes %i\n", + pipe_name(pipe), pipe_config->fdi_lanes); + if (pipe_config->fdi_lanes > 4) { + DRM_DEBUG_KMS("invalid fdi lane config on pipe %c: %i lanes\n", + pipe_name(pipe), pipe_config->fdi_lanes); + return false; + } + + if (IS_HASWELL(dev)) { + if (pipe_config->fdi_lanes > 2) { + DRM_DEBUG_KMS("only 2 lanes on haswell, required: %i lanes\n", + pipe_config->fdi_lanes); + return false; + } else { + return true; + } + } + + if (INTEL_INFO(dev)->num_pipes == 2) + return true; + + /* Ivybridge 3 pipe is really complicated */ + switch (pipe) { + case PIPE_A: + return true; + case PIPE_B: + if (dev_priv->pipe_to_crtc_mapping[PIPE_C]->enabled && + pipe_config->fdi_lanes > 2) { + DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %c: %i lanes\n", + pipe_name(pipe), pipe_config->fdi_lanes); + return false; + } + return true; + case PIPE_C: + if (!pipe_B_crtc->base.enabled || + pipe_B_crtc->config.fdi_lanes <= 2) { + if (pipe_config->fdi_lanes > 2) { + DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %c: %i lanes\n", + pipe_name(pipe), pipe_config->fdi_lanes); + return false; + } + } else { + DRM_DEBUG_KMS("fdi link B uses too many lanes to enable link C\n"); + return false; + } + return true; + default: + BUG(); + } +} + +static bool ironlake_fdi_compute_config(struct intel_crtc *intel_crtc, struct intel_crtc_config *pipe_config) { + struct drm_device *dev = intel_crtc->base.dev; struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; int target_clock, lane, link_bw; @@ -4003,6 +4062,9 @@ static void ironlake_fdi_compute_config(struct drm_device *dev, link_bw *= pipe_config->pixel_multiplier; intel_link_compute_m_n(pipe_config->pipe_bpp, lane, target_clock, link_bw, &pipe_config->fdi_m_n); + + return ironlake_check_fdi_lanes(intel_crtc->base.dev, + intel_crtc->pipe, pipe_config); } static bool intel_crtc_compute_config(struct drm_crtc *crtc, @@ -4040,7 +4102,7 @@ static bool intel_crtc_compute_config(struct drm_crtc *crtc, } if (pipe_config->has_pch_encoder) - ironlake_fdi_compute_config(dev, pipe_config); + return ironlake_fdi_compute_config(to_intel_crtc(crtc), pipe_config); return true; } @@ -5424,63 +5486,6 @@ static void cpt_enable_fdi_bc_bifurcation(struct drm_device *dev) POSTING_READ(SOUTH_CHICKEN1); } -static bool ironlake_check_fdi_lanes(struct intel_crtc *intel_crtc) -{ - struct drm_device *dev = intel_crtc->base.dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct intel_crtc *pipe_B_crtc = - to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]); - - DRM_DEBUG_KMS("checking fdi config on pipe %c, lanes %i\n", - pipe_name(intel_crtc->pipe), intel_crtc->config.fdi_lanes); - if (intel_crtc->config.fdi_lanes > 4) { - DRM_DEBUG_KMS("invalid fdi lane config on pipe %c: %i lanes\n", - pipe_name(intel_crtc->pipe), intel_crtc->config.fdi_lanes); - /* Clamp lanes to avoid programming the hw with bogus values. */ - intel_crtc->config.fdi_lanes = 4; - - return false; - } - - if (INTEL_INFO(dev)->num_pipes == 2) - return true; - - switch (intel_crtc->pipe) { - case PIPE_A: - return true; - case PIPE_B: - if (dev_priv->pipe_to_crtc_mapping[PIPE_C]->enabled && - intel_crtc->config.fdi_lanes > 2) { - DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %c: %i lanes\n", - pipe_name(intel_crtc->pipe), intel_crtc->config.fdi_lanes); - /* Clamp lanes to avoid programming the hw with bogus values. */ - intel_crtc->config.fdi_lanes = 2; - - return false; - } - - return true; - case PIPE_C: - if (!pipe_B_crtc->base.enabled || pipe_B_crtc->config.fdi_lanes <= 2) { - if (intel_crtc->config.fdi_lanes > 2) { - DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %c: %i lanes\n", - pipe_name(intel_crtc->pipe), intel_crtc->config.fdi_lanes); - /* Clamp lanes to avoid programming the hw with bogus values. */ - intel_crtc->config.fdi_lanes = 2; - - return false; - } - } else { - DRM_DEBUG_KMS("fdi link B uses too many lanes to enable link C\n"); - return false; - } - - return true; - default: - BUG(); - } -} - static void ivybridge_update_fdi_bc_bifurcation(struct intel_crtc *intel_crtc) { struct drm_device *dev = intel_crtc->base.dev; @@ -5672,7 +5677,6 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc, bool is_lvds = false; struct intel_encoder *encoder; int ret; - bool fdi_config_ok; for_each_encoder_on_crtc(dev, crtc, encoder) { switch (encoder->type) { @@ -5765,14 +5769,11 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc, intel_set_pipe_timings(intel_crtc, mode, adjusted_mode); - /* Note, this also computes intel_crtc->fdi_lanes which is used below in - * ironlake_check_fdi_lanes. */ if (intel_crtc->config.has_pch_encoder) { intel_cpu_transcoder_set_m_n(intel_crtc, &intel_crtc->config.fdi_m_n); } - fdi_config_ok = ironlake_check_fdi_lanes(intel_crtc); if (IS_IVYBRIDGE(dev)) ivybridge_update_fdi_bc_bifurcation(intel_crtc); @@ -5788,7 +5789,7 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc, intel_update_linetime_watermarks(dev, pipe, adjusted_mode); - return fdi_config_ok ? ret : -EINVAL; + return ret; } static bool ironlake_get_pipe_config(struct intel_crtc *crtc, -- 2.20.1