[3/5] drm/i915/dp: Remove intel_dp->detect_done flag

Message ID	20180918072009.4836-3-dhinakaran.pandiyan@intel.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <intel-gfx-bounces@lists.freedesktop.org> From: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> To: intel-gfx@lists.freedesktop.org Date: Tue, 18 Sep 2018 00:20:07 -0700 Message-Id: <20180918072009.4836-3-dhinakaran.pandiyan@intel.com> In-Reply-To: <20180918072009.4836-1-dhinakaran.pandiyan@intel.com> References: <20180918072009.4836-1-dhinakaran.pandiyan@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 3/5] drm/i915/dp: Remove intel_dp->detect_done flag Precedence: list Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
Series	[1/5] drm/i915/dp: Fix link retraining comment in intel_dp_long_pulse() \| expand [1/5] drm/i915/dp: Fix link retraining comment in intel_dp_long_pulse() [2/5] drm/i915/dp: Restrict link retrain workaround to external monitors [3/5] drm/i915/dp: Remove intel_dp->detect_done flag [4/5] drm/i915/dp: Fix duplication of DEVICE_SERVICE_IRQ handling [5/5] drm/i915/dp: Move hdcp link check function into short pulse handler

Message ID

20180918072009.4836-3-dhinakaran.pandiyan@intel.com (mailing list archive)

State

New, archived

Headers

From: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
To: intel-gfx@lists.freedesktop.org
Date: Tue, 18 Sep 2018 00:20:07 -0700
Message-Id: <20180918072009.4836-3-dhinakaran.pandiyan@intel.com>
In-Reply-To: <20180918072009.4836-1-dhinakaran.pandiyan@intel.com>
References: <20180918072009.4836-1-dhinakaran.pandiyan@intel.com>
MIME-Version: 1.0
Subject: [Intel-gfx] [PATCH 3/5] drm/i915/dp: Remove intel_dp->detect_done
 flag
Precedence: list
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>

Series

[1/5] drm/i915/dp: Fix link retraining comment in intel_dp_long_pulse() | expand

Commit Message

Dhinakaran Pandiyan Sept. 18, 2018, 7:20 a.m. UTC

The intel_dp->detect_done flag is no more useful. Pull
intel_dp_long_pulse() into the lone caller,

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c  | 63 +++++++++++++---------------------------
 drivers/gpu/drm/i915/intel_drv.h |  1 -
 2 files changed, 20 insertions(+), 44 deletions(-)

Comments

Ville Syrjälä Sept. 19, 2018, 5:28 p.m. UTC | #1

On Tue, Sep 18, 2018 at 12:20:07AM -0700, Dhinakaran Pandiyan wrote:
> The intel_dp->detect_done flag is no more useful. Pull
> intel_dp_long_pulse() into the lone caller,
> 
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dp.c  | 63 +++++++++++++---------------------------
>  drivers/gpu/drm/i915/intel_drv.h |  1 -
>  2 files changed, 20 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 8bf9afa5683c..d06bf4303814 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -5012,13 +5012,25 @@ intel_dp_unset_edid(struct intel_dp *intel_dp)
>  }
>  
>  static int
> -intel_dp_long_pulse(struct intel_connector *connector,
> -		    struct drm_modeset_acquire_ctx *ctx)
> +intel_dp_detect(struct drm_connector *connector,
> +		struct drm_modeset_acquire_ctx *ctx,
> +		bool force)
>  {
> -	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> -	struct intel_dp *intel_dp = intel_attached_dp(&connector->base);
> -	enum drm_connector_status status;
> +	struct drm_i915_private *dev_priv = to_i915(connector->dev);
> +	struct intel_dp *intel_dp = intel_attached_dp(connector);
> +	int status;
>  	u8 sink_irq_vector = 0;
> +	struct drm_crtc *crtc;
> +
> +	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
> +		      connector->base.id, connector->name);
> +
> +	crtc = connector->state->crtc;
> +	if (crtc) {
> +		status = drm_modeset_lock(&crtc->mutex, ctx);

The 'status' name looks a bit weird here. I'm leaning towards keeping
the 'int ret' for this case.

Hmm. Actually, why are we even taking this lock here anyway? I would
imagine we only need it for the link retraining and 
intel_dp_retrain_link() already grabs it so we should be able to
just drop this code. Would allow page flips and detect to execute
in parallel again.

> +		if (status)
> +			return status;
> +	}
>  
>  	WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
>  
> @@ -5093,9 +5105,9 @@ intel_dp_long_pulse(struct intel_connector *connector,
>  	intel_dp->aux.i2c_defer_count = 0;
>  
>  	intel_dp_set_edid(intel_dp);
> -	if (intel_dp_is_edp(intel_dp) || connector->detect_edid)
> +	if (intel_dp_is_edp(intel_dp) ||
> +	    to_intel_connector(connector)->detect_edid)
>  		status = connector_status_connected;
> -	intel_dp->detect_done = true;
>  
>  	/* Try to read the source of the interrupt */
>  	if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
> @@ -5120,37 +5132,6 @@ intel_dp_long_pulse(struct intel_connector *connector,
>  	return status;
>  }
>  
> -static int
> -intel_dp_detect(struct drm_connector *connector,
> -		struct drm_modeset_acquire_ctx *ctx,
> -		bool force)
> -{
> -	struct intel_dp *intel_dp = intel_attached_dp(connector);
> -	int status = connector->status;
> -
> -	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
> -		      connector->base.id, connector->name);
> -
> -	/* If full detect is not performed yet, do a full detect */
> -	if (!intel_dp->detect_done) {
> -		struct drm_crtc *crtc;
> -		int ret;
> -
> -		crtc = connector->state->crtc;
> -		if (crtc) {
> -			ret = drm_modeset_lock(&crtc->mutex, ctx);
> -			if (ret)
> -				return ret;
> -		}
> -
> -		status = intel_dp_long_pulse(intel_dp->attached_connector, ctx);
> -	}
> -
> -	intel_dp->detect_done = false;
> -
> -	return status;
> -}
> -
>  static void
>  intel_dp_force(struct drm_connector *connector)
>  {
> @@ -5643,7 +5624,6 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
>  
>  	if (long_hpd) {
>  		intel_dp->reset_link_params = true;
> -		intel_dp->detect_done = false;
>  		return IRQ_NONE;
>  	}
>  
> @@ -5660,7 +5640,6 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
>  			intel_dp->is_mst = false;
>  			drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
>  							intel_dp->is_mst);
> -			intel_dp->detect_done = false;
>  			goto put_power;
>  		}
>  	}
> @@ -5673,10 +5652,8 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
>  		/* Short pulse can signify loss of hdcp authentication */
>  		intel_hdcp_check_link(intel_dp->attached_connector);
>  
> -		if (!handled) {
> -			intel_dp->detect_done = false;
> +		if (!handled)
>  			goto put_power;
> -		}
>  	}
>  
>  	ret = IRQ_HANDLED;
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index bf1c38728a59..c7206a4764e5 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1070,7 +1070,6 @@ struct intel_dp {
>  	bool link_mst;
>  	bool link_trained;
>  	bool has_audio;
> -	bool detect_done;
>  	bool reset_link_params;
>  	enum aux_ch aux_ch;
>  	uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
> -- 
> 2.14.1

Dhinakaran Pandiyan Sept. 19, 2018, 5:43 p.m. UTC | #2

On Wed, 2018-09-19 at 20:28 +0300, Ville Syrjälä wrote:
> On Tue, Sep 18, 2018 at 12:20:07AM -0700, Dhinakaran Pandiyan wrote:
> > The intel_dp->detect_done flag is no more useful. Pull
> > intel_dp_long_pulse() into the lone caller,
> > 
> > Cc: Jani Nikula <jani.nikula@linux.intel.com>
> > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_dp.c  | 63 +++++++++++++---------------
> > ------------
> >  drivers/gpu/drm/i915/intel_drv.h |  1 -
> >  2 files changed, 20 insertions(+), 44 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c
> > b/drivers/gpu/drm/i915/intel_dp.c
> > index 8bf9afa5683c..d06bf4303814 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -5012,13 +5012,25 @@ intel_dp_unset_edid(struct intel_dp
> > *intel_dp)
> >  }
> >  
> >  static int
> > -intel_dp_long_pulse(struct intel_connector *connector,
> > -		    struct drm_modeset_acquire_ctx *ctx)
> > +intel_dp_detect(struct drm_connector *connector,
> > +		struct drm_modeset_acquire_ctx *ctx,
> > +		bool force)
> >  {
> > -	struct drm_i915_private *dev_priv = to_i915(connector-
> > >base.dev);
> > -	struct intel_dp *intel_dp = intel_attached_dp(&connector-
> > >base);
> > -	enum drm_connector_status status;
> > +	struct drm_i915_private *dev_priv = to_i915(connector-
> > >dev);
> > +	struct intel_dp *intel_dp = intel_attached_dp(connector);
> > +	int status;
> >  	u8 sink_irq_vector = 0;
> > +	struct drm_crtc *crtc;
> > +
> > +	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
> > +		      connector->base.id, connector->name);
> > +
> > +	crtc = connector->state->crtc;
> > +	if (crtc) {
> > +		status = drm_modeset_lock(&crtc->mutex, ctx);
> 
> The 'status' name looks a bit weird here. I'm leaning towards keeping
> the 'int ret' for this case.
It does indeed, just wanted to reuse the local variable. Will change it
in the next version.

> 
> Hmm. Actually, why are we even taking this lock here anyway? I would
> imagine we only need it for the link retraining and 
> intel_dp_retrain_link() already grabs it so we should be able to
> just drop this code. Would allow page flips and detect to execute
> in parallel again.
> 
Looks like the code wasn't updated when intel_dp_retrain_link() started
grabbing the locks.

> > +		if (status)
> > +			return status;
> > +	}
> >  
> >  	WARN_ON(!drm_modeset_is_locked(&dev_priv-
> > >drm.mode_config.connection_mutex));
> >  
> > @@ -5093,9 +5105,9 @@ intel_dp_long_pulse(struct intel_connector
> > *connector,
> >  	intel_dp->aux.i2c_defer_count = 0;
> >  
> >  	intel_dp_set_edid(intel_dp);
> > -	if (intel_dp_is_edp(intel_dp) || connector->detect_edid)
> > +	if (intel_dp_is_edp(intel_dp) ||
> > +	    to_intel_connector(connector)->detect_edid)
> >  		status = connector_status_connected;
> > -	intel_dp->detect_done = true;
> >  
> >  	/* Try to read the source of the interrupt */
> >  	if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
> > @@ -5120,37 +5132,6 @@ intel_dp_long_pulse(struct intel_connector
> > *connector,
> >  	return status;
> >  }
> >  
> > -static int
> > -intel_dp_detect(struct drm_connector *connector,
> > -		struct drm_modeset_acquire_ctx *ctx,
> > -		bool force)
> > -{
> > -	struct intel_dp *intel_dp = intel_attached_dp(connector);
> > -	int status = connector->status;
> > -
> > -	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
> > -		      connector->base.id, connector->name);
> > -
> > -	/* If full detect is not performed yet, do a full detect
> > */
> > -	if (!intel_dp->detect_done) {
> > -		struct drm_crtc *crtc;
> > -		int ret;
> > -
> > -		crtc = connector->state->crtc;
> > -		if (crtc) {
> > -			ret = drm_modeset_lock(&crtc->mutex, ctx);
> > -			if (ret)
> > -				return ret;
> > -		}
> > -
> > -		status = intel_dp_long_pulse(intel_dp-
> > >attached_connector, ctx);
> > -	}
> > -
> > -	intel_dp->detect_done = false;
> > -
> > -	return status;
> > -}
> > -
> >  static void
> >  intel_dp_force(struct drm_connector *connector)
> >  {
> > @@ -5643,7 +5624,6 @@ intel_dp_hpd_pulse(struct intel_digital_port
> > *intel_dig_port, bool long_hpd)
> >  
> >  	if (long_hpd) {
> >  		intel_dp->reset_link_params = true;
> > -		intel_dp->detect_done = false;
> >  		return IRQ_NONE;
> >  	}
> >  
> > @@ -5660,7 +5640,6 @@ intel_dp_hpd_pulse(struct intel_digital_port
> > *intel_dig_port, bool long_hpd)
> >  			intel_dp->is_mst = false;
> >  			drm_dp_mst_topology_mgr_set_mst(&intel_dp-
> > >mst_mgr,
> >  							intel_dp-
> > >is_mst);
> > -			intel_dp->detect_done = false;
> >  			goto put_power;
> >  		}
> >  	}
> > @@ -5673,10 +5652,8 @@ intel_dp_hpd_pulse(struct intel_digital_port
> > *intel_dig_port, bool long_hpd)
> >  		/* Short pulse can signify loss of hdcp
> > authentication */
> >  		intel_hdcp_check_link(intel_dp-
> > >attached_connector);
> >  
> > -		if (!handled) {
> > -			intel_dp->detect_done = false;
> > +		if (!handled)
> >  			goto put_power;
> > -		}
> >  	}
> >  
> >  	ret = IRQ_HANDLED;
> > diff --git a/drivers/gpu/drm/i915/intel_drv.h
> > b/drivers/gpu/drm/i915/intel_drv.h
> > index bf1c38728a59..c7206a4764e5 100644
> > --- a/drivers/gpu/drm/i915/intel_drv.h
> > +++ b/drivers/gpu/drm/i915/intel_drv.h
> > @@ -1070,7 +1070,6 @@ struct intel_dp {
> >  	bool link_mst;
> >  	bool link_trained;
> >  	bool has_audio;
> > -	bool detect_done;
> >  	bool reset_link_params;
> >  	enum aux_ch aux_ch;
> >  	uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
> > -- 
> > 2.14.1
> 
>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 8bf9afa5683c..d06bf4303814 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5012,13 +5012,25 @@  intel_dp_unset_edid(struct intel_dp *intel_dp)
 }
 
 static int
-intel_dp_long_pulse(struct intel_connector *connector,
-		    struct drm_modeset_acquire_ctx *ctx)
+intel_dp_detect(struct drm_connector *connector,
+		struct drm_modeset_acquire_ctx *ctx,
+		bool force)
 {
-	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
-	struct intel_dp *intel_dp = intel_attached_dp(&connector->base);
-	enum drm_connector_status status;
+	struct drm_i915_private *dev_priv = to_i915(connector->dev);
+	struct intel_dp *intel_dp = intel_attached_dp(connector);
+	int status;
 	u8 sink_irq_vector = 0;
+	struct drm_crtc *crtc;
+
+	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
+		      connector->base.id, connector->name);
+
+	crtc = connector->state->crtc;
+	if (crtc) {
+		status = drm_modeset_lock(&crtc->mutex, ctx);
+		if (status)
+			return status;
+	}
 
 	WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
 
@@ -5093,9 +5105,9 @@  intel_dp_long_pulse(struct intel_connector *connector,
 	intel_dp->aux.i2c_defer_count = 0;
 
 	intel_dp_set_edid(intel_dp);
-	if (intel_dp_is_edp(intel_dp) || connector->detect_edid)
+	if (intel_dp_is_edp(intel_dp) ||
+	    to_intel_connector(connector)->detect_edid)
 		status = connector_status_connected;
-	intel_dp->detect_done = true;
 
 	/* Try to read the source of the interrupt */
 	if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
@@ -5120,37 +5132,6 @@  intel_dp_long_pulse(struct intel_connector *connector,
 	return status;
 }
 
-static int
-intel_dp_detect(struct drm_connector *connector,
-		struct drm_modeset_acquire_ctx *ctx,
-		bool force)
-{
-	struct intel_dp *intel_dp = intel_attached_dp(connector);
-	int status = connector->status;
-
-	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
-		      connector->base.id, connector->name);
-
-	/* If full detect is not performed yet, do a full detect */
-	if (!intel_dp->detect_done) {
-		struct drm_crtc *crtc;
-		int ret;
-
-		crtc = connector->state->crtc;
-		if (crtc) {
-			ret = drm_modeset_lock(&crtc->mutex, ctx);
-			if (ret)
-				return ret;
-		}
-
-		status = intel_dp_long_pulse(intel_dp->attached_connector, ctx);
-	}
-
-	intel_dp->detect_done = false;
-
-	return status;
-}
-
 static void
 intel_dp_force(struct drm_connector *connector)
 {
@@ -5643,7 +5624,6 @@  intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
 
 	if (long_hpd) {
 		intel_dp->reset_link_params = true;
-		intel_dp->detect_done = false;
 		return IRQ_NONE;
 	}
 
@@ -5660,7 +5640,6 @@  intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
 			intel_dp->is_mst = false;
 			drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
 							intel_dp->is_mst);
-			intel_dp->detect_done = false;
 			goto put_power;
 		}
 	}
@@ -5673,10 +5652,8 @@  intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
 		/* Short pulse can signify loss of hdcp authentication */
 		intel_hdcp_check_link(intel_dp->attached_connector);
 
-		if (!handled) {
-			intel_dp->detect_done = false;
+		if (!handled)
 			goto put_power;
-		}
 	}
 
 	ret = IRQ_HANDLED;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index bf1c38728a59..c7206a4764e5 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1070,7 +1070,6 @@  struct intel_dp {
 	bool link_mst;
 	bool link_trained;
 	bool has_audio;
-	bool detect_done;
 	bool reset_link_params;
 	enum aux_ch aux_ch;
 	uint8_t dpcd[DP_RECEIVER_CAP_SIZE];

[3/5] drm/i915/dp: Remove intel_dp->detect_done flag

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