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().
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
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