diff mbox series

[v5] drm/i915: Init lspcon chip dynamically

Message ID 20200506102844.26596-1-kai.heng.feng@canonical.com (mailing list archive)
State New, archived
Headers show
Series [v5] drm/i915: Init lspcon chip dynamically | expand

Commit Message

Kai-Heng Feng May 6, 2020, 10:28 a.m. UTC 
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(-)

Comments

Kai-Heng Feng June 8, 2020, 3:55 a.m. UTC | #1 
> On May 6, 2020, at 18:28, Kai-Heng Feng <kai.heng.feng@canonical.com> 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.
> 
> 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>

A gentle ping...

> ---
> 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,
> -- 
> 2.17.1
>
diff mbox series

Patch

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,