On Wed, Jun 10, 2020 at 03:55:10PM +0800, Kai-Heng Feng wrote: > On HP 800 G4 DM, if HDMI cable isn't plugged before boot, the HDMI port > becomes useless and never responds to cable hotplugging: > [ 3.031904] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon > [ 3.031945] [drm:intel_ddi_init [i915]] *ERROR* LSPCON init failed on port D > > Seems like the lspcon chip on the system only gets powered after the > cable is plugged. > > Consilidate lspcon_init() into lspcon_resume() to dynamically init > lspcon chip, and make HDMI port work. > > Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> > --- > v6: > - Rebase on latest for-linux-next. > > v5: > - Consolidate lspcon_resume() with lspcon_init(). > - Move more logic into lspcon code. > > v4: > - Trust VBT in intel_infoframe_init(). > - Init lspcon in intel_dp_detect(). > > v3: > - Make sure it's handled under long HPD case. > > v2: > - Move lspcon_init() inside of intel_dp_hpd_pulse(). Hoisted the changelog above --- where it belongs in drm land, amended with Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/203 and pushed the patch to dinq. Thanks, and sorry for the horrendous latency. PS. This will cause some headache for Uma's lspcon HDR stuff, but so be it. > > drivers/gpu/drm/i915/display/intel_ddi.c | 19 +------ > drivers/gpu/drm/i915/display/intel_dp.c | 10 ++-- > drivers/gpu/drm/i915/display/intel_hdmi.c | 3 +- > drivers/gpu/drm/i915/display/intel_lspcon.c | 63 ++++++++++++--------- > drivers/gpu/drm/i915/display/intel_lspcon.h | 3 +- > 5 files changed, 43 insertions(+), 55 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c > index aa22465bb56e..af755b1aa24b 100644 > --- a/drivers/gpu/drm/i915/display/intel_ddi.c > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c > @@ -4805,7 +4805,7 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port) > { > struct intel_digital_port *intel_dig_port; > struct intel_encoder *encoder; > - bool init_hdmi, init_dp, init_lspcon = false; > + bool init_hdmi, init_dp; > enum phy phy = intel_port_to_phy(dev_priv, port); > > init_hdmi = intel_bios_port_supports_dvi(dev_priv, port) || > @@ -4819,7 +4819,6 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port) > * is initialized before lspcon. > */ > init_dp = true; > - init_lspcon = true; > init_hdmi = false; > drm_dbg_kms(&dev_priv->drm, "VBT says port %c has lspcon\n", > port_name(port)); > @@ -4904,22 +4903,6 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port) > goto err; > } > > - if (init_lspcon) { > - if (lspcon_init(intel_dig_port)) > - /* TODO: handle hdmi info frame part */ > - drm_dbg_kms(&dev_priv->drm, > - "LSPCON init success on port %c\n", > - port_name(port)); > - else > - /* > - * LSPCON init faied, but DP init was success, so > - * lets try to drive as DP++ port. > - */ > - drm_err(&dev_priv->drm, > - "LSPCON init failed on port %c\n", > - port_name(port)); > - } > - > if (INTEL_GEN(dev_priv) >= 11) { > if (intel_phy_is_tc(dev_priv, phy)) > intel_dig_port->connected = intel_tc_port_connected; > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c > index ed9e53c373a7..398a104158a8 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -5962,15 +5962,14 @@ static enum drm_connector_status > intel_dp_detect_dpcd(struct intel_dp *intel_dp) > { > struct drm_i915_private *i915 = dp_to_i915(intel_dp); > - struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp); > + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); > u8 *dpcd = intel_dp->dpcd; > u8 type; > > if (WARN_ON(intel_dp_is_edp(intel_dp))) > return connector_status_connected; > > - if (lspcon->active) > - lspcon_resume(lspcon); > + lspcon_resume(dig_port); > > if (!intel_dp_get_dpcd(intel_dp)) > return connector_status_disconnected; > @@ -7056,14 +7055,13 @@ void intel_dp_encoder_reset(struct drm_encoder *encoder) > { > struct drm_i915_private *dev_priv = to_i915(encoder->dev); > struct intel_dp *intel_dp = enc_to_intel_dp(to_intel_encoder(encoder)); > - struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp); > + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); > intel_wakeref_t wakeref; > > if (!HAS_DDI(dev_priv)) > intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg); > > - if (lspcon->active) > - lspcon_resume(lspcon); > + lspcon_resume(dig_port); > > intel_dp->reset_link_params = true; > > diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c > index 010f37240710..643ad2127931 100644 > --- a/drivers/gpu/drm/i915/display/intel_hdmi.c > +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c > @@ -3155,7 +3155,8 @@ void intel_infoframe_init(struct intel_digital_port *intel_dig_port) > intel_dig_port->set_infoframes = g4x_set_infoframes; > intel_dig_port->infoframes_enabled = g4x_infoframes_enabled; > } else if (HAS_DDI(dev_priv)) { > - if (intel_dig_port->lspcon.active) { > + if (intel_bios_is_lspcon_present(dev_priv, > + intel_dig_port->base.port)) { > intel_dig_port->write_infoframe = lspcon_write_infoframe; > intel_dig_port->read_infoframe = lspcon_read_infoframe; > intel_dig_port->set_infoframes = lspcon_set_infoframes; > diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c > index 6ff7b226f0a1..e3dde4c25604 100644 > --- a/drivers/gpu/drm/i915/display/intel_lspcon.c > +++ b/drivers/gpu/drm/i915/display/intel_lspcon.c > @@ -525,44 +525,17 @@ u32 lspcon_infoframes_enabled(struct intel_encoder *encoder, > return 0; > } > > -void lspcon_resume(struct intel_lspcon *lspcon) > -{ > - enum drm_lspcon_mode expected_mode; > - > - if (lspcon_wake_native_aux_ch(lspcon)) { > - expected_mode = DRM_LSPCON_MODE_PCON; > - lspcon_resume_in_pcon_wa(lspcon); > - } else { > - expected_mode = DRM_LSPCON_MODE_LS; > - } > - > - if (lspcon_wait_mode(lspcon, expected_mode) == DRM_LSPCON_MODE_PCON) > - return; > - > - if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON)) > - DRM_ERROR("LSPCON resume failed\n"); > - else > - DRM_DEBUG_KMS("LSPCON resume success\n"); > -} > - > void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon) > { > lspcon_wait_mode(lspcon, DRM_LSPCON_MODE_PCON); > } > > -bool lspcon_init(struct intel_digital_port *intel_dig_port) > +static bool lspcon_init(struct intel_digital_port *intel_dig_port) > { > struct intel_dp *dp = &intel_dig_port->dp; > struct intel_lspcon *lspcon = &intel_dig_port->lspcon; > - struct drm_device *dev = intel_dig_port->base.base.dev; > - struct drm_i915_private *dev_priv = to_i915(dev); > struct drm_connector *connector = &dp->attached_connector->base; > > - if (!HAS_LSPCON(dev_priv)) { > - DRM_ERROR("LSPCON is not supported on this platform\n"); > - return false; > - } > - > lspcon->active = false; > lspcon->mode = DRM_LSPCON_MODE_INVALID; > > @@ -586,3 +559,37 @@ bool lspcon_init(struct intel_digital_port *intel_dig_port) > DRM_DEBUG_KMS("Success: LSPCON init\n"); > return true; > } > + > +void lspcon_resume(struct intel_digital_port *intel_dig_port) > +{ > + struct intel_lspcon *lspcon = &intel_dig_port->lspcon; > + struct drm_device *dev = intel_dig_port->base.base.dev; > + struct drm_i915_private *dev_priv = to_i915(dev); > + enum drm_lspcon_mode expected_mode; > + > + if (!intel_bios_is_lspcon_present(dev_priv, intel_dig_port->base.port)) > + return; > + > + if (!lspcon->active) { > + if (!lspcon_init(intel_dig_port)) { > + DRM_ERROR("LSPCON init failed on port %c\n", > + port_name(intel_dig_port->base.port)); > + return; > + } > + } > + > + if (lspcon_wake_native_aux_ch(lspcon)) { > + expected_mode = DRM_LSPCON_MODE_PCON; > + lspcon_resume_in_pcon_wa(lspcon); > + } else { > + expected_mode = DRM_LSPCON_MODE_LS; > + } > + > + if (lspcon_wait_mode(lspcon, expected_mode) == DRM_LSPCON_MODE_PCON) > + return; > + > + if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON)) > + DRM_ERROR("LSPCON resume failed\n"); > + else > + DRM_DEBUG_KMS("LSPCON resume success\n"); > +} > diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.h b/drivers/gpu/drm/i915/display/intel_lspcon.h > index 37cfddf8a9c5..169db35db13e 100644 > --- a/drivers/gpu/drm/i915/display/intel_lspcon.h > +++ b/drivers/gpu/drm/i915/display/intel_lspcon.h > @@ -15,8 +15,7 @@ struct intel_digital_port; > struct intel_encoder; > struct intel_lspcon; > > -bool lspcon_init(struct intel_digital_port *intel_dig_port); > -void lspcon_resume(struct intel_lspcon *lspcon); > +void lspcon_resume(struct intel_digital_port *intel_dig_port); > void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon); > void lspcon_write_infoframe(struct intel_encoder *encoder, > const struct intel_crtc_state *crtc_state, > -- > 2.17.1 -- Ville Syrjälä Intel _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
