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* [Intel-gfx] [PATCH] drm/i915: Add bigjoiner force enable option to debugfs
@ 2023-10-12 12:34 Stanislav Lisovskiy
  2023-10-12 14:59 ` Jani Nikula
                   ` (4 more replies)
  0 siblings, 5 replies; 18+ messages in thread
From: Stanislav Lisovskiy @ 2023-10-12 12:34 UTC (permalink / raw)
  To: intel-gfx; +Cc: jani.nikula

For validation purposes, it might be useful to be able to
force Bigjoiner mode, even if current dotclock/resolution
do not require that.
Lets add such to option to debugfs.

v2: - Apparently intel_dp_need_bigjoiner can't be used, when
      debugfs entry is created so lets just check manually
      the DISPLAY_VER.

v3: - Switch to intel_connector from drm_connector(Jani Nikula)
    - Remove redundant modeset lock(Jani Nikula)
    - Use kstrtobool_from_user for boolean value(Jani Nikula)

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
---
 .../drm/i915/display/intel_display_debugfs.c  | 72 ++++++++++++++++++-
 .../drm/i915/display/intel_display_types.h    |  2 +
 drivers/gpu/drm/i915/display/intel_dp.c       |  6 +-
 3 files changed, 76 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index fbe75d47a165..dea7bbea83ba 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1398,13 +1398,37 @@ out:	drm_modeset_unlock(&dev->mode_config.connection_mutex);
 	return ret;
 }
 
+static int i915_bigjoiner_enable_show(struct seq_file *m, void *data)
+{
+	struct intel_connector *connector = to_intel_connector(m->private);
+	struct drm_crtc *crtc;
+	struct intel_encoder *encoder = intel_attached_encoder(connector);
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	int ret;
+
+	if (!encoder)
+		return -ENODEV;
+
+	crtc = connector->base.state->crtc;
+	if (connector->base.status != connector_status_connected || !crtc) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	seq_printf(m, "Bigjoiner enable: %d\n", intel_dp->force_bigjoiner_enable);
+
+out:
+
+	return ret;
+}
+
 static ssize_t i915_dsc_output_format_write(struct file *file,
 					    const char __user *ubuf,
 					    size_t len, loff_t *offp)
 {
-	struct drm_connector *connector =
-		((struct seq_file *)file->private_data)->private;
-	struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
+	struct seq_file *m = file->private_data;
+        struct intel_connector *connector = m->private;
+	struct intel_encoder *encoder = intel_attached_encoder(connector);
 	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 	int dsc_output_format = 0;
 	int ret;
@@ -1419,12 +1443,39 @@ static ssize_t i915_dsc_output_format_write(struct file *file,
 	return len;
 }
 
+static ssize_t i915_bigjoiner_enable_fops_write(struct file *file,
+						const char __user *ubuf,
+						size_t len, loff_t *offp)
+{
+	struct drm_connector *connector =
+		((struct seq_file *)file->private_data)->private;
+	struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	bool bigjoiner_en = 0;
+	int ret;
+
+	ret = kstrtobool_from_user(ubuf, len, &bigjoiner_en);
+	if (ret < 0)
+		return ret;
+
+	intel_dp->force_bigjoiner_enable = bigjoiner_en;
+	*offp += len;
+
+	return len;
+}
+
 static int i915_dsc_output_format_open(struct inode *inode,
 				       struct file *file)
 {
 	return single_open(file, i915_dsc_output_format_show, inode->i_private);
 }
 
+static int i915_bigjoiner_enable_open(struct inode *inode,
+				      struct file *file)
+{
+	return single_open(file, i915_bigjoiner_enable_show, inode->i_private);
+}
+
 static const struct file_operations i915_dsc_output_format_fops = {
 	.owner = THIS_MODULE,
 	.open = i915_dsc_output_format_open,
@@ -1434,6 +1485,15 @@ static const struct file_operations i915_dsc_output_format_fops = {
 	.write = i915_dsc_output_format_write
 };
 
+static const struct file_operations i915_bigjoiner_enable_fops = {
+	.owner = THIS_MODULE,
+	.open = i915_bigjoiner_enable_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = i915_bigjoiner_enable_fops_write
+};
+
 /*
  * Returns the Current CRTC's bpc.
  * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc
@@ -1513,6 +1573,12 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector)
 				    connector, &i915_dsc_output_format_fops);
 	}
 
+	if (DISPLAY_VER(dev_priv) >= 11 &&
+	    intel_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		debugfs_create_file("i915_bigjoiner_force_enable", 0644, root,
+				    &intel_connector->base, &i915_bigjoiner_enable_fops);
+	}
+
 	if (connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8d8b2f8d37a9..e0de6eeaf59e 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1753,6 +1753,8 @@ struct intel_dp {
 	bool is_mst;
 	int active_mst_links;
 
+	bool force_bigjoiner_enable;
+
 	/* connector directly attached - won't be use for modeset in mst world */
 	struct intel_connector *attached_connector;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 0ef7cb8134b6..daf9bc0d6838 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1153,7 +1153,11 @@ bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp,
 	if (!intel_dp_can_bigjoiner(intel_dp))
 		return false;
 
-	return clock > i915->max_dotclk_freq || hdisplay > 5120;
+	if (intel_dp->force_bigjoiner_enable)
+		drm_dbg_kms(&i915->drm, "Forcing bigjoiner mode\n");
+
+	return clock > i915->max_dotclk_freq || hdisplay > 5120 ||
+	       intel_dp->force_bigjoiner_enable;
 }
 
 static enum drm_mode_status
-- 
2.37.3


^ permalink raw reply related	[flat|nested] 18+ messages in thread
* [Intel-gfx] [PATCH] drm/i915: Add bigjoiner force enable option to debugfs
@ 2023-11-16 10:37 Stanislav Lisovskiy
  2023-11-16 13:48 ` Modem, Bhanuprakash
  0 siblings, 1 reply; 18+ messages in thread
From: Stanislav Lisovskiy @ 2023-11-16 10:37 UTC (permalink / raw)
  To: intel-gfx

For validation purposes, it might be useful to be able to
force Bigjoiner mode, even if current dotclock/resolution
do not require that.
Lets add such to option to debugfs.

v2: - Apparently intel_dp_need_bigjoiner can't be used, when
      debugfs entry is created so lets just check manually
      the DISPLAY_VER.

v3: - Switch to intel_connector from drm_connector(Jani Nikula)
    - Remove redundant modeset lock(Jani Nikula)
    - Use kstrtobool_from_user for boolean value(Jani Nikula)

v4: - Apply the changes to proper function(Jani Nikula)

v5: - Removed unnecessary check from i915_bigjoiner_enable_show
      (Ville Syrjälä)
    - Added eDP connector check to intel_connector_debugfs_add
      (Ville Syrjälä)
    - Removed debug message in order to prevent dmesg flooding
      (Ville Syrjälä)

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
---
 .../drm/i915/display/intel_display_debugfs.c  | 59 +++++++++++++++++++
 .../drm/i915/display/intel_display_types.h    |  2 +
 drivers/gpu/drm/i915/display/intel_dp.c       |  3 +-
 3 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 915420d0cef8f..aa95ecf2458ee 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1414,6 +1414,22 @@ out:	drm_modeset_unlock(&dev->mode_config.connection_mutex);
 	return ret;
 }
 
+static int i915_bigjoiner_enable_show(struct seq_file *m, void *data)
+{
+	struct intel_connector *connector = to_intel_connector(m->private);
+	struct intel_encoder *encoder = intel_attached_encoder(connector);
+	struct intel_dp *intel_dp;
+
+	if (!encoder)
+		return -ENODEV;
+
+	intel_dp = enc_to_intel_dp(encoder);
+
+	seq_printf(m, "Bigjoiner enable: %d\n", intel_dp->force_bigjoiner_enable);
+
+	return 0;
+}
+
 static ssize_t i915_dsc_output_format_write(struct file *file,
 					    const char __user *ubuf,
 					    size_t len, loff_t *offp)
@@ -1435,12 +1451,39 @@ static ssize_t i915_dsc_output_format_write(struct file *file,
 	return len;
 }
 
+static ssize_t i915_bigjoiner_enable_fops_write(struct file *file,
+						const char __user *ubuf,
+						size_t len, loff_t *offp)
+{
+	struct seq_file *m = file->private_data;
+	struct intel_connector *connector = m->private;
+	struct intel_encoder *encoder = intel_attached_encoder(connector);
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	bool bigjoiner_en = 0;
+	int ret;
+
+	ret = kstrtobool_from_user(ubuf, len, &bigjoiner_en);
+	if (ret < 0)
+		return ret;
+
+	intel_dp->force_bigjoiner_enable = bigjoiner_en;
+	*offp += len;
+
+	return len;
+}
+
 static int i915_dsc_output_format_open(struct inode *inode,
 				       struct file *file)
 {
 	return single_open(file, i915_dsc_output_format_show, inode->i_private);
 }
 
+static int i915_bigjoiner_enable_open(struct inode *inode,
+				      struct file *file)
+{
+	return single_open(file, i915_bigjoiner_enable_show, inode->i_private);
+}
+
 static const struct file_operations i915_dsc_output_format_fops = {
 	.owner = THIS_MODULE,
 	.open = i915_dsc_output_format_open,
@@ -1529,6 +1572,15 @@ static const struct file_operations i915_dsc_fractional_bpp_fops = {
 	.write = i915_dsc_fractional_bpp_write
 };
 
+static const struct file_operations i915_bigjoiner_enable_fops = {
+	.owner = THIS_MODULE,
+	.open = i915_bigjoiner_enable_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = i915_bigjoiner_enable_fops_write
+};
+
 /*
  * Returns the Current CRTC's bpc.
  * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc
@@ -1611,6 +1663,13 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector)
 				    connector, &i915_dsc_fractional_bpp_fops);
 	}
 
+	if (DISPLAY_VER(dev_priv) >= 11 &&
+	    (intel_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
+	     intel_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)) {
+		debugfs_create_file("i915_bigjoiner_force_enable", 0644, root,
+				    &intel_connector->base, &i915_bigjoiner_enable_fops);
+	}
+
 	if (connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 9a44350ba05dd..559302ff79c1a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1764,6 +1764,8 @@ struct intel_dp {
 	bool is_mst;
 	int active_mst_links;
 
+	bool force_bigjoiner_enable;
+
 	/* connector directly attached - won't be use for modeset in mst world */
 	struct intel_connector *attached_connector;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 54bd0bffa9f08..5b8411b9fc30b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1172,7 +1172,8 @@ bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp,
 	if (!intel_dp_can_bigjoiner(intel_dp))
 		return false;
 
-	return clock > i915->max_dotclk_freq || hdisplay > 5120;
+	return clock > i915->max_dotclk_freq || hdisplay > 5120 ||
+	       intel_dp->force_bigjoiner_enable;
 }
 
 static enum drm_mode_status
-- 
2.37.3


^ permalink raw reply related	[flat|nested] 18+ messages in thread
* [Intel-gfx] [PATCH] drm/i915: Add bigjoiner force enable option to debugfs
@ 2023-10-18 13:24 Stanislav Lisovskiy
  2023-10-25 12:59 ` Ville Syrjälä
  0 siblings, 1 reply; 18+ messages in thread
From: Stanislav Lisovskiy @ 2023-10-18 13:24 UTC (permalink / raw)
  To: intel-gfx; +Cc: jani.nikula

For validation purposes, it might be useful to be able to
force Bigjoiner mode, even if current dotclock/resolution
do not require that.
Lets add such to option to debugfs.

v2: - Apparently intel_dp_need_bigjoiner can't be used, when
      debugfs entry is created so lets just check manually
      the DISPLAY_VER.

v3: - Switch to intel_connector from drm_connector(Jani Nikula)
    - Remove redundant modeset lock(Jani Nikula)
    - Use kstrtobool_from_user for boolean value(Jani Nikula)

v4: - Apply the changes to proper function(Jani Nikula)

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
---
 .../drm/i915/display/intel_display_debugfs.c  | 66 +++++++++++++++++++
 .../drm/i915/display/intel_display_types.h    |  2 +
 drivers/gpu/drm/i915/display/intel_dp.c       |  6 +-
 3 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index fbe75d47a165..9b810c6f96ea 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1398,6 +1398,30 @@ out:	drm_modeset_unlock(&dev->mode_config.connection_mutex);
 	return ret;
 }
 
+static int i915_bigjoiner_enable_show(struct seq_file *m, void *data)
+{
+	struct intel_connector *connector = to_intel_connector(m->private);
+	struct drm_crtc *crtc;
+	struct intel_encoder *encoder = intel_attached_encoder(connector);
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	int ret = 0;
+
+	if (!encoder)
+		return -ENODEV;
+
+	crtc = connector->base.state->crtc;
+	if (connector->base.status != connector_status_connected || !crtc) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	seq_printf(m, "Bigjoiner enable: %d\n", intel_dp->force_bigjoiner_enable);
+
+out:
+
+	return ret;
+}
+
 static ssize_t i915_dsc_output_format_write(struct file *file,
 					    const char __user *ubuf,
 					    size_t len, loff_t *offp)
@@ -1419,12 +1443,39 @@ static ssize_t i915_dsc_output_format_write(struct file *file,
 	return len;
 }
 
+static ssize_t i915_bigjoiner_enable_fops_write(struct file *file,
+						const char __user *ubuf,
+						size_t len, loff_t *offp)
+{
+	struct seq_file *m = file->private_data;
+	struct intel_connector *connector = m->private;
+	struct intel_encoder *encoder = intel_attached_encoder(connector);
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	bool bigjoiner_en = 0;
+	int ret;
+
+	ret = kstrtobool_from_user(ubuf, len, &bigjoiner_en);
+	if (ret < 0)
+		return ret;
+
+	intel_dp->force_bigjoiner_enable = bigjoiner_en;
+	*offp += len;
+
+	return len;
+}
+
 static int i915_dsc_output_format_open(struct inode *inode,
 				       struct file *file)
 {
 	return single_open(file, i915_dsc_output_format_show, inode->i_private);
 }
 
+static int i915_bigjoiner_enable_open(struct inode *inode,
+				      struct file *file)
+{
+	return single_open(file, i915_bigjoiner_enable_show, inode->i_private);
+}
+
 static const struct file_operations i915_dsc_output_format_fops = {
 	.owner = THIS_MODULE,
 	.open = i915_dsc_output_format_open,
@@ -1434,6 +1485,15 @@ static const struct file_operations i915_dsc_output_format_fops = {
 	.write = i915_dsc_output_format_write
 };
 
+static const struct file_operations i915_bigjoiner_enable_fops = {
+	.owner = THIS_MODULE,
+	.open = i915_bigjoiner_enable_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = i915_bigjoiner_enable_fops_write
+};
+
 /*
  * Returns the Current CRTC's bpc.
  * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc
@@ -1513,6 +1573,12 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector)
 				    connector, &i915_dsc_output_format_fops);
 	}
 
+	if (DISPLAY_VER(dev_priv) >= 11 &&
+	    intel_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		debugfs_create_file("i915_bigjoiner_force_enable", 0644, root,
+				    &intel_connector->base, &i915_bigjoiner_enable_fops);
+	}
+
 	if (connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8d8b2f8d37a9..e0de6eeaf59e 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1753,6 +1753,8 @@ struct intel_dp {
 	bool is_mst;
 	int active_mst_links;
 
+	bool force_bigjoiner_enable;
+
 	/* connector directly attached - won't be use for modeset in mst world */
 	struct intel_connector *attached_connector;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 4f6835a7578e..6a9148232a9c 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1153,7 +1153,11 @@ bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp,
 	if (!intel_dp_can_bigjoiner(intel_dp))
 		return false;
 
-	return clock > i915->max_dotclk_freq || hdisplay > 5120;
+	if (intel_dp->force_bigjoiner_enable)
+		drm_dbg_kms(&i915->drm, "Forcing bigjoiner mode\n");
+
+	return clock > i915->max_dotclk_freq || hdisplay > 5120 ||
+	       intel_dp->force_bigjoiner_enable;
 }
 
 static enum drm_mode_status
-- 
2.37.3


^ permalink raw reply related	[flat|nested] 18+ messages in thread
* [Intel-gfx] [PATCH] drm/i915: Add bigjoiner force enable option to debugfs
@ 2023-10-09 13:30 Stanislav Lisovskiy
  2023-10-11  8:49 ` Jani Nikula
  0 siblings, 1 reply; 18+ messages in thread
From: Stanislav Lisovskiy @ 2023-10-09 13:30 UTC (permalink / raw)
  To: intel-gfx

For validation purposes, it might be useful to be able to
force Bigjoiner mode, even if current dotclock/resolution
do not require that.
Lets add such to option to debugfs.

v2: - Apparently intel_dp_need_bigjoiner can't be used, when
      debugfs entry is created so lets just check manually
      the DISPLAY_VER.

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
---
 .../drm/i915/display/intel_display_debugfs.c  | 71 +++++++++++++++++++
 .../drm/i915/display/intel_display_types.h    |  2 +
 drivers/gpu/drm/i915/display/intel_dp.c       |  6 +-
 3 files changed, 78 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index f6d7c4d45fae..c806957cb902 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1399,6 +1399,35 @@ out:	drm_modeset_unlock(&dev->mode_config.connection_mutex);
 	return ret;
 }
 
+static int i915_bigjoiner_enable_show(struct seq_file *m, void *data)
+{
+	struct drm_connector *connector = m->private;
+	struct drm_device *dev = connector->dev;
+	struct drm_crtc *crtc;
+	struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	int ret;
+
+	if (!encoder)
+		return -ENODEV;
+
+	ret = drm_modeset_lock_single_interruptible(&dev->mode_config.connection_mutex);
+	if (ret)
+		return ret;
+
+	crtc = connector->state->crtc;
+	if (connector->status != connector_status_connected || !crtc) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	seq_printf(m, "Bigjoiner enable: %d\n", intel_dp->force_bigjoiner_en);
+
+out:	drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+	return ret;
+}
+
 static ssize_t i915_dsc_output_format_write(struct file *file,
 					    const char __user *ubuf,
 					    size_t len, loff_t *offp)
@@ -1420,12 +1449,39 @@ static ssize_t i915_dsc_output_format_write(struct file *file,
 	return len;
 }
 
+static ssize_t i915_bigjoiner_enable_fops_write(struct file *file,
+						const char __user *ubuf,
+						size_t len, loff_t *offp)
+{
+	struct drm_connector *connector =
+		((struct seq_file *)file->private_data)->private;
+	struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	int bigjoiner_en = 0;
+	int ret;
+
+	ret = kstrtoint_from_user(ubuf, len, 0, &bigjoiner_en);
+	if (ret < 0)
+		return ret;
+
+	intel_dp->force_bigjoiner_en = bigjoiner_en;
+	*offp += len;
+
+	return len;
+}
+
 static int i915_dsc_output_format_open(struct inode *inode,
 				       struct file *file)
 {
 	return single_open(file, i915_dsc_output_format_show, inode->i_private);
 }
 
+static int i915_bigjoiner_enable_open(struct inode *inode,
+				      struct file *file)
+{
+	return single_open(file, i915_bigjoiner_enable_show, inode->i_private);
+}
+
 static const struct file_operations i915_dsc_output_format_fops = {
 	.owner = THIS_MODULE,
 	.open = i915_dsc_output_format_open,
@@ -1435,6 +1491,15 @@ static const struct file_operations i915_dsc_output_format_fops = {
 	.write = i915_dsc_output_format_write
 };
 
+static const struct file_operations i915_bigjoiner_enable_fops = {
+	.owner = THIS_MODULE,
+	.open = i915_bigjoiner_enable_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = i915_bigjoiner_enable_fops_write
+};
+
 /*
  * Returns the Current CRTC's bpc.
  * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc
@@ -1514,6 +1579,12 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector)
 				    connector, &i915_dsc_output_format_fops);
 	}
 
+	if (DISPLAY_VER(dev_priv) >= 11 &&
+	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		debugfs_create_file("i915_bigjoiner_force_enable", 0644, root,
+				    connector, &i915_bigjoiner_enable_fops);
+	}
+
 	if (connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8d8b2f8d37a9..ecec8a25838e 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1753,6 +1753,8 @@ struct intel_dp {
 	bool is_mst;
 	int active_mst_links;
 
+	bool force_bigjoiner_en;
+
 	/* connector directly attached - won't be use for modeset in mst world */
 	struct intel_connector *attached_connector;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f0f43aeabd21..7e553cb7ecbb 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1153,7 +1153,11 @@ bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp,
 	if (!intel_dp_can_bigjoiner(intel_dp))
 		return false;
 
-	return clock > i915->max_dotclk_freq || hdisplay > 5120;
+	if (intel_dp->force_bigjoiner_en)
+		drm_dbg_kms(&i915->drm, "Forcing bigjoiner mode");
+
+	return clock > i915->max_dotclk_freq || hdisplay > 5120 ||
+	       intel_dp->force_bigjoiner_en;
 }
 
 static enum drm_mode_status
-- 
2.37.3


^ permalink raw reply related	[flat|nested] 18+ messages in thread
* [Intel-gfx] [PATCH] drm/i915: Add bigjoiner force enable option to debugfs
@ 2023-10-06 14:15 Stanislav Lisovskiy
  0 siblings, 0 replies; 18+ messages in thread
From: Stanislav Lisovskiy @ 2023-10-06 14:15 UTC (permalink / raw)
  To: intel-gfx

For validation purposes, it might be useful to be able to
force Bigjoiner mode, even if current dotclock/resolution
do not require that.
Lets add such to option to debugfs.

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
---
 .../drm/i915/display/intel_display_debugfs.c  | 71 +++++++++++++++++++
 .../drm/i915/display/intel_display_types.h    |  2 +
 drivers/gpu/drm/i915/display/intel_dp.c       |  3 +-
 3 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index f6d7c4d45fae..5855c6de91a7 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1399,6 +1399,35 @@ out:	drm_modeset_unlock(&dev->mode_config.connection_mutex);
 	return ret;
 }
 
+static int i915_bigjoiner_enable_show(struct seq_file *m, void *data)
+{
+	struct drm_connector *connector = m->private;
+	struct drm_device *dev = connector->dev;
+	struct drm_crtc *crtc;
+	struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	int ret;
+
+	if (!encoder)
+		return -ENODEV;
+
+	ret = drm_modeset_lock_single_interruptible(&dev->mode_config.connection_mutex);
+	if (ret)
+		return ret;
+
+	crtc = connector->state->crtc;
+	if (connector->status != connector_status_connected || !crtc) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	seq_printf(m, "Bigjoiner enable: %d\n", intel_dp->force_bigjoiner_en);
+
+out:	drm_modeset_unlock(&dev->mode_config.connection_mutex);
+
+	return ret;
+}
+
 static ssize_t i915_dsc_output_format_write(struct file *file,
 					    const char __user *ubuf,
 					    size_t len, loff_t *offp)
@@ -1420,12 +1449,39 @@ static ssize_t i915_dsc_output_format_write(struct file *file,
 	return len;
 }
 
+static ssize_t i915_bigjoiner_enable_fops_write(struct file *file,
+						const char __user *ubuf,
+						size_t len, loff_t *offp)
+{
+	struct drm_connector *connector =
+		((struct seq_file *)file->private_data)->private;
+	struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	int bigjoiner_en = 0;
+	int ret;
+
+	ret = kstrtoint_from_user(ubuf, len, 0, &bigjoiner_en);
+	if (ret < 0)
+		return ret;
+
+	intel_dp->force_bigjoiner_en = bigjoiner_en;
+	*offp += len;
+
+	return len;
+}
+
 static int i915_dsc_output_format_open(struct inode *inode,
 				       struct file *file)
 {
 	return single_open(file, i915_dsc_output_format_show, inode->i_private);
 }
 
+static int i915_bigjoiner_enable_open(struct inode *inode,
+				      struct file *file)
+{
+	return single_open(file, i915_bigjoiner_enable_show, inode->i_private);
+}
+
 static const struct file_operations i915_dsc_output_format_fops = {
 	.owner = THIS_MODULE,
 	.open = i915_dsc_output_format_open,
@@ -1435,6 +1491,15 @@ static const struct file_operations i915_dsc_output_format_fops = {
 	.write = i915_dsc_output_format_write
 };
 
+static const struct file_operations i915_bigjoiner_enable_fops = {
+	.owner = THIS_MODULE,
+	.open = i915_bigjoiner_enable_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = i915_bigjoiner_enable_fops_write
+};
+
 /*
  * Returns the Current CRTC's bpc.
  * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc
@@ -1514,6 +1579,12 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector)
 				    connector, &i915_dsc_output_format_fops);
 	}
 
+	if (intel_dp_can_bigjoiner(enc_to_intel_dp(intel_connector->encoder)) &&
+	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+		debugfs_create_file("i915_bigjoiner_force_enable", 0644, root,
+				    connector, &i915_bigjoiner_enable_fops);
+	}
+
 	if (connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
 	    connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8d8b2f8d37a9..ecec8a25838e 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1753,6 +1753,8 @@ struct intel_dp {
 	bool is_mst;
 	int active_mst_links;
 
+	bool force_bigjoiner_en;
+
 	/* connector directly attached - won't be use for modeset in mst world */
 	struct intel_connector *attached_connector;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f0f43aeabd21..6665214bd332 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1153,7 +1153,8 @@ bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp,
 	if (!intel_dp_can_bigjoiner(intel_dp))
 		return false;
 
-	return clock > i915->max_dotclk_freq || hdisplay > 5120;
+	return clock > i915->max_dotclk_freq || hdisplay > 5120 ||
+	       intel_dp->force_bigjoiner_en;
 }
 
 static enum drm_mode_status
-- 
2.37.3


^ permalink raw reply related	[flat|nested] 18+ messages in thread
end of thread, other threads:[~2024-01-18  6:01 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-10-12 12:34 [Intel-gfx] [PATCH] drm/i915: Add bigjoiner force enable option to debugfs Stanislav Lisovskiy
2023-10-12 14:59 ` Jani Nikula
2023-10-13  9:54   ` Lisovskiy, Stanislav
2023-10-12 17:42 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915: Add bigjoiner force enable option to debugfs (rev3) Patchwork
2023-10-12 17:53 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2023-10-13 16:58 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork
2023-10-17  9:49 ` [Intel-gfx] [PATCH] drm/i915: Add bigjoiner force enable option to debugfs kernel test robot
  -- strict thread matches above, loose matches on Subject: below --
2023-11-16 10:37 Stanislav Lisovskiy
2023-11-16 13:48 ` Modem, Bhanuprakash
2023-10-18 13:24 Stanislav Lisovskiy
2023-10-25 12:59 ` Ville Syrjälä
2024-01-17 16:46   ` Sharma, Swati2
2024-01-17 18:01     ` Jani Nikula
2024-01-18  6:01       ` Sharma, Swati2
2023-10-09 13:30 Stanislav Lisovskiy
2023-10-11  8:49 ` Jani Nikula
2023-10-11  8:59   ` Lisovskiy, Stanislav
2023-10-06 14:15 Stanislav Lisovskiy

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