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.

Consolidate lspcon_init() into lspcon_resume() to dynamically init lspcon chip, and make HDMI port work.

Closes: https://gitlab.freedesktop.org/drm/intel/issues/203 Signed-off-by: Kai-Heng Feng kai.heng.feng@canonical.com --- 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().

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 5601673c3f30..798fd640da54 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -4770,7 +4770,7 @@ 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) || @@ -4784,7 +4784,6 @@ 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)); @@ -4869,22 +4868,6 @@ 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)); - } - intel_infoframe_init(intel_dig_port);

return; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 6952b0295096..e26aa35d6e37 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -5938,15 +5938,14 @@ 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; @@ -7198,14 +7197,13 @@ 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 d807c5648c87..f5f06d2a839a 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 enc_to_intel_lspcon(encoder)->active; }

-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,