1 files changed, 78 insertions, 166 deletions

diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
index 979f6d3239ba..34ddbf98e81d 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
@@ -1437,7 +1437,7 @@ zynqmp_dp_disp_connected_live_layer(struct zynqmp_dp *dp)
 }
 
 static void zynqmp_dp_disp_enable(struct zynqmp_dp *dp,
-				  struct drm_bridge_state *old_bridge_state)
+				  struct drm_atomic_state *state)
 {
 	struct zynqmp_disp_layer *layer;
 	struct drm_bridge_state *bridge_state;
@@ -1447,8 +1447,7 @@ static void zynqmp_dp_disp_enable(struct zynqmp_dp *dp,
 	if (!layer)
 		return;
 
-	bridge_state = drm_atomic_get_new_bridge_state(old_bridge_state->base.state,
-						       old_bridge_state->bridge);
+	bridge_state = drm_atomic_get_new_bridge_state(state, &dp->bridge);
 	if (WARN_ON(!bridge_state))
 		return;
 
@@ -1482,6 +1481,7 @@ static void zynqmp_dp_disp_disable(struct zynqmp_dp *dp,
  */
 
 static int zynqmp_dp_bridge_attach(struct drm_bridge *bridge,
+				   struct drm_encoder *encoder,
 				   enum drm_bridge_attach_flags flags)
 {
 	struct zynqmp_dp *dp = bridge_to_dp(bridge);
@@ -1495,7 +1495,7 @@ static int zynqmp_dp_bridge_attach(struct drm_bridge *bridge,
 	}
 
 	if (dp->next_bridge) {
-		ret = drm_bridge_attach(bridge->encoder, dp->next_bridge,
+		ret = drm_bridge_attach(encoder, dp->next_bridge,
 					bridge, flags);
 		if (ret < 0)
 			goto error;
@@ -1534,10 +1534,10 @@ zynqmp_dp_bridge_mode_valid(struct drm_bridge *bridge,
 	}
 
 	/* Check with link rate and lane count */
-	mutex_lock(&dp->lock);
-	rate = zynqmp_dp_max_rate(dp->link_config.max_rate,
-				  dp->link_config.max_lanes, dp->config.bpp);
-	mutex_unlock(&dp->lock);
+	scoped_guard(mutex, &dp->lock)
+		rate = zynqmp_dp_max_rate(dp->link_config.max_rate,
+					  dp->link_config.max_lanes,
+					  dp->config.bpp);
 	if (mode->clock > rate) {
 		dev_dbg(dp->dev, "filtered mode %s for high pixel rate\n",
 			mode->name);
@@ -1549,10 +1549,9 @@ zynqmp_dp_bridge_mode_valid(struct drm_bridge *bridge,
 }
 
 static void zynqmp_dp_bridge_atomic_enable(struct drm_bridge *bridge,
-					   struct drm_bridge_state *old_bridge_state)
+					   struct drm_atomic_state *state)
 {
 	struct zynqmp_dp *dp = bridge_to_dp(bridge);
-	struct drm_atomic_state *state = old_bridge_state->base.state;
 	const struct drm_crtc_state *crtc_state;
 	const struct drm_display_mode *adjusted_mode;
 	const struct drm_display_mode *mode;
@@ -1565,7 +1564,7 @@ static void zynqmp_dp_bridge_atomic_enable(struct drm_bridge *bridge,
 	pm_runtime_get_sync(dp->dev);
 
 	guard(mutex)(&dp->lock);
-	zynqmp_dp_disp_enable(dp, old_bridge_state);
+	zynqmp_dp_disp_enable(dp, state);
 
 	/*
 	 * Retrieve the CRTC mode and adjusted mode. This requires a little
@@ -1627,8 +1626,10 @@ static void zynqmp_dp_bridge_atomic_enable(struct drm_bridge *bridge,
 }
 
 static void zynqmp_dp_bridge_atomic_disable(struct drm_bridge *bridge,
-					    struct drm_bridge_state *old_bridge_state)
+					    struct drm_atomic_state *state)
 {
+	struct drm_bridge_state *old_bridge_state = drm_atomic_get_old_bridge_state(state,
+										    bridge);
 	struct zynqmp_dp *dp = bridge_to_dp(bridge);
 
 	mutex_lock(&dp->lock);
@@ -1719,16 +1720,13 @@ disconnected:
 	return connector_status_disconnected;
 }
 
-static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *bridge)
+static enum drm_connector_status
+zynqmp_dp_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connector)
 {
 	struct zynqmp_dp *dp = bridge_to_dp(bridge);
-	enum drm_connector_status ret;
 
-	mutex_lock(&dp->lock);
-	ret = __zynqmp_dp_bridge_detect(dp);
-	mutex_unlock(&dp->lock);
-
-	return ret;
+	guard(mutex)(&dp->lock);
+	return __zynqmp_dp_bridge_detect(dp);
 }
 
 static const struct drm_edid *zynqmp_dp_bridge_edid_read(struct drm_bridge *bridge,
@@ -1872,21 +1870,14 @@ static int zynqmp_dp_test_setup(struct zynqmp_dp *dp)
 static ssize_t zynqmp_dp_pattern_read(struct file *file, char __user *user_buf,
 				      size_t count, loff_t *ppos)
 {
-	struct dentry *dentry = file->f_path.dentry;
 	struct zynqmp_dp *dp = file->private_data;
 	char buf[16];
 	ssize_t ret;
 
-	ret = debugfs_file_get(dentry);
-	if (unlikely(ret))
-		return ret;
+	scoped_guard(mutex, &dp->lock)
+		ret = snprintf(buf, sizeof(buf), "%s\n",
+			       test_pattern_str[dp->test.pattern]);
 
-	mutex_lock(&dp->lock);
-	ret = snprintf(buf, sizeof(buf), "%s\n",
-		       test_pattern_str[dp->test.pattern]);
-	mutex_unlock(&dp->lock);
-
-	debugfs_file_put(dentry);
 	return simple_read_from_buffer(user_buf, count, ppos, buf, ret);
 }
 
@@ -1894,27 +1885,20 @@ static ssize_t zynqmp_dp_pattern_write(struct file *file,
 				       const char __user *user_buf,
 				       size_t count, loff_t *ppos)
 {
-	struct dentry *dentry = file->f_path.dentry;
 	struct zynqmp_dp *dp = file->private_data;
 	char buf[16];
 	ssize_t ret;
 	int pattern;
 
-	ret = debugfs_file_get(dentry);
-	if (unlikely(ret))
-		return ret;
-
 	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf,
 				     count);
 	if (ret < 0)
-		goto out;
+		return ret;
 	buf[ret] = '\0';
 
 	pattern = sysfs_match_string(test_pattern_str, buf);
-	if (pattern < 0) {
-		ret = -EINVAL;
-		goto out;
-	}
+	if (pattern < 0)
+		return -EINVAL;
 
 	mutex_lock(&dp->lock);
 	dp->test.pattern = pattern;
@@ -1923,8 +1907,6 @@ static ssize_t zynqmp_dp_pattern_write(struct file *file,
 						 dp->test.custom) ?: ret;
 	mutex_unlock(&dp->lock);
 
-out:
-	debugfs_file_put(dentry);
 	return ret;
 }
 
@@ -1939,24 +1921,18 @@ static int zynqmp_dp_enhanced_get(void *data, u64 *val)
 {
 	struct zynqmp_dp *dp = data;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*val = dp->test.enhanced;
-	mutex_unlock(&dp->lock);
 	return 0;
 }
 
 static int zynqmp_dp_enhanced_set(void *data, u64 val)
 {
 	struct zynqmp_dp *dp = data;
-	int ret = 0;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	dp->test.enhanced = val;
-	if (dp->test.active)
-		ret = zynqmp_dp_test_setup(dp);
-	mutex_unlock(&dp->lock);
-
-	return ret;
+	return dp->test.active ? zynqmp_dp_test_setup(dp) : 0;
 }
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_zynqmp_dp_enhanced, zynqmp_dp_enhanced_get,
@@ -1966,24 +1942,19 @@ static int zynqmp_dp_downspread_get(void *data, u64 *val)
 {
 	struct zynqmp_dp *dp = data;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*val = dp->test.downspread;
-	mutex_unlock(&dp->lock);
 	return 0;
 }
 
 static int zynqmp_dp_downspread_set(void *data, u64 val)
 {
 	struct zynqmp_dp *dp = data;
-	int ret = 0;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	dp->test.downspread = val;
-	if (dp->test.active)
-		ret = zynqmp_dp_test_setup(dp);
-	mutex_unlock(&dp->lock);
 
-	return ret;
+	return dp->test.active ? zynqmp_dp_test_setup(dp) : 0;
 }
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_zynqmp_dp_downspread, zynqmp_dp_downspread_get,
@@ -1993,33 +1964,32 @@ static int zynqmp_dp_active_get(void *data, u64 *val)
 {
 	struct zynqmp_dp *dp = data;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*val = dp->test.active;
-	mutex_unlock(&dp->lock);
 	return 0;
 }
 
 static int zynqmp_dp_active_set(void *data, u64 val)
 {
 	struct zynqmp_dp *dp = data;
-	int ret = 0;
+	int ret;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	if (val) {
 		if (val < 2) {
 			ret = zynqmp_dp_test_setup(dp);
 			if (ret)
-				goto out;
+				return ret;
 		}
 
 		ret = zynqmp_dp_set_test_pattern(dp, dp->test.pattern,
 						 dp->test.custom);
 		if (ret)
-			goto out;
+			return ret;
 
 		ret = zynqmp_dp_update_vs_emph(dp, dp->test.train_set);
 		if (ret)
-			goto out;
+			return ret;
 
 		dp->test.active = true;
 	} else {
@@ -2032,10 +2002,8 @@ static int zynqmp_dp_active_set(void *data, u64 val)
 				 err);
 		zynqmp_dp_train_loop(dp);
 	}
-out:
-	mutex_unlock(&dp->lock);
 
-	return ret;
+	return 0;
 }
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_zynqmp_dp_active, zynqmp_dp_active_get,
@@ -2044,20 +2012,13 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_zynqmp_dp_active, zynqmp_dp_active_get,
 static ssize_t zynqmp_dp_custom_read(struct file *file, char __user *user_buf,
 				     size_t count, loff_t *ppos)
 {
-	struct dentry *dentry = file->f_path.dentry;
 	struct zynqmp_dp *dp = file->private_data;
 	ssize_t ret;
 
-	ret = debugfs_file_get(dentry);
-	if (unlikely(ret))
-		return ret;
-
 	mutex_lock(&dp->lock);
 	ret = simple_read_from_buffer(user_buf, count, ppos, &dp->test.custom,
 				      sizeof(dp->test.custom));
 	mutex_unlock(&dp->lock);
-
-	debugfs_file_put(dentry);
 	return ret;
 }
 
@@ -2065,18 +2026,13 @@ static ssize_t zynqmp_dp_custom_write(struct file *file,
 				      const char __user *user_buf,
 				      size_t count, loff_t *ppos)
 {
-	struct dentry *dentry = file->f_path.dentry;
 	struct zynqmp_dp *dp = file->private_data;
 	ssize_t ret;
 	char buf[sizeof(dp->test.custom)];
 
-	ret = debugfs_file_get(dentry);
-	if (unlikely(ret))
-		return ret;
-
 	ret = simple_write_to_buffer(buf, sizeof(buf), ppos, user_buf, count);
 	if (ret < 0)
-		goto out;
+		return ret;
 
 	mutex_lock(&dp->lock);
 	memcpy(dp->test.custom, buf, ret);
@@ -2084,9 +2040,6 @@ static ssize_t zynqmp_dp_custom_write(struct file *file,
 		ret = zynqmp_dp_set_test_pattern(dp, dp->test.pattern,
 						 dp->test.custom) ?: ret;
 	mutex_unlock(&dp->lock);
-
-out:
-	debugfs_file_put(dentry);
 	return ret;
 }
 
@@ -2102,9 +2055,8 @@ static int zynqmp_dp_swing_get(void *data, u64 *val)
 	struct zynqmp_dp_train_set_priv *priv = data;
 	struct zynqmp_dp *dp = priv->dp;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*val = dp->test.train_set[priv->lane] & DP_TRAIN_VOLTAGE_SWING_MASK;
-	mutex_unlock(&dp->lock);
 	return 0;
 }
 
@@ -2113,12 +2065,11 @@ static int zynqmp_dp_swing_set(void *data, u64 val)
 	struct zynqmp_dp_train_set_priv *priv = data;
 	struct zynqmp_dp *dp = priv->dp;
 	u8 *train_set = &dp->test.train_set[priv->lane];
-	int ret = 0;
 
 	if (val > 3)
 		return -EINVAL;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*train_set &= ~(DP_TRAIN_MAX_SWING_REACHED |
 			DP_TRAIN_VOLTAGE_SWING_MASK);
 	*train_set |= val;
@@ -2126,10 +2077,9 @@ static int zynqmp_dp_swing_set(void *data, u64 val)
 		*train_set |= DP_TRAIN_MAX_SWING_REACHED;
 
 	if (dp->test.active)
-		ret = zynqmp_dp_update_vs_emph(dp, dp->test.train_set);
-	mutex_unlock(&dp->lock);
+		return zynqmp_dp_update_vs_emph(dp, dp->test.train_set);
 
-	return ret;
+	return 0;
 }
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_zynqmp_dp_swing, zynqmp_dp_swing_get,
@@ -2140,10 +2090,9 @@ static int zynqmp_dp_preemphasis_get(void *data, u64 *val)
 	struct zynqmp_dp_train_set_priv *priv = data;
 	struct zynqmp_dp *dp = priv->dp;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*val = FIELD_GET(DP_TRAIN_PRE_EMPHASIS_MASK,
 			 dp->test.train_set[priv->lane]);
-	mutex_unlock(&dp->lock);
 	return 0;
 }
 
@@ -2152,12 +2101,11 @@ static int zynqmp_dp_preemphasis_set(void *data, u64 val)
 	struct zynqmp_dp_train_set_priv *priv = data;
 	struct zynqmp_dp *dp = priv->dp;
 	u8 *train_set = &dp->test.train_set[priv->lane];
-	int ret = 0;
 
 	if (val > 2)
 		return -EINVAL;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*train_set &= ~(DP_TRAIN_MAX_PRE_EMPHASIS_REACHED |
 			DP_TRAIN_PRE_EMPHASIS_MASK);
 	*train_set |= val;
@@ -2165,10 +2113,9 @@ static int zynqmp_dp_preemphasis_set(void *data, u64 val)
 		*train_set |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
 
 	if (dp->test.active)
-		ret = zynqmp_dp_update_vs_emph(dp, dp->test.train_set);
-	mutex_unlock(&dp->lock);
+		return zynqmp_dp_update_vs_emph(dp, dp->test.train_set);
 
-	return ret;
+	return 0;
 }
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_zynqmp_dp_preemphasis, zynqmp_dp_preemphasis_get,
@@ -2178,31 +2125,24 @@ static int zynqmp_dp_lanes_get(void *data, u64 *val)
 {
 	struct zynqmp_dp *dp = data;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*val = dp->test.link_cnt;
-	mutex_unlock(&dp->lock);
 	return 0;
 }
 
 static int zynqmp_dp_lanes_set(void *data, u64 val)
 {
 	struct zynqmp_dp *dp = data;
-	int ret = 0;
 
 	if (val > ZYNQMP_DP_MAX_LANES)
 		return -EINVAL;
 
-	mutex_lock(&dp->lock);
-	if (val > dp->num_lanes) {
-		ret = -EINVAL;
-	} else {
-		dp->test.link_cnt = val;
-		if (dp->test.active)
-			ret = zynqmp_dp_test_setup(dp);
-	}
-	mutex_unlock(&dp->lock);
+	guard(mutex)(&dp->lock);
+	if (val > dp->num_lanes)
+		return -EINVAL;
 
-	return ret;
+	dp->test.link_cnt = val;
+	return dp->test.active ? zynqmp_dp_test_setup(dp) : 0;
 }
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_zynqmp_dp_lanes, zynqmp_dp_lanes_get,
@@ -2212,9 +2152,8 @@ static int zynqmp_dp_rate_get(void *data, u64 *val)
 {
 	struct zynqmp_dp *dp = data;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*val = drm_dp_bw_code_to_link_rate(dp->test.bw_code) * 10000ULL;
-	mutex_unlock(&dp->lock);
 	return 0;
 }
 
@@ -2222,7 +2161,6 @@ static int zynqmp_dp_rate_set(void *data, u64 val)
 {
 	struct zynqmp_dp *dp = data;
 	int link_rate;
-	int ret = 0;
 	u8 bw_code;
 
 	if (do_div(val, 10000))
@@ -2237,13 +2175,9 @@ static int zynqmp_dp_rate_set(void *data, u64 val)
 	    bw_code != DP_LINK_BW_5_4)
 		return -EINVAL;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	dp->test.bw_code = bw_code;
-	if (dp->test.active)
-		ret = zynqmp_dp_test_setup(dp);
-	mutex_unlock(&dp->lock);
-
-	return ret;
+	return dp->test.active ? zynqmp_dp_test_setup(dp) : 0;
 }
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_zynqmp_dp_rate, zynqmp_dp_rate_get,
@@ -2253,9 +2187,8 @@ static int zynqmp_dp_ignore_aux_errors_get(void *data, u64 *val)
 {
 	struct zynqmp_dp *dp = data;
 
-	mutex_lock(&dp->aux.hw_mutex);
+	guard(mutex)(&dp->lock);
 	*val = dp->ignore_aux_errors;
-	mutex_unlock(&dp->aux.hw_mutex);
 	return 0;
 }
 
@@ -2266,9 +2199,8 @@ static int zynqmp_dp_ignore_aux_errors_set(void *data, u64 val)
 	if (val != !!val)
 		return -EINVAL;
 
-	mutex_lock(&dp->aux.hw_mutex);
+	guard(mutex)(&dp->lock);
 	dp->ignore_aux_errors = val;
-	mutex_unlock(&dp->aux.hw_mutex);
 	return 0;
 }
 
@@ -2280,9 +2212,8 @@ static int zynqmp_dp_ignore_hpd_get(void *data, u64 *val)
 {
 	struct zynqmp_dp *dp = data;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	*val = dp->ignore_hpd;
-	mutex_unlock(&dp->lock);
 	return 0;
 }
 
@@ -2293,9 +2224,8 @@ static int zynqmp_dp_ignore_hpd_set(void *data, u64 val)
 	if (val != !!val)
 		return -EINVAL;
 
-	mutex_lock(&dp->lock);
+	guard(mutex)(&dp->lock);
 	dp->ignore_hpd = val;
-	mutex_lock(&dp->lock);
 	return 0;
 }
 
@@ -2391,14 +2321,12 @@ static void zynqmp_dp_hpd_work_func(struct work_struct *work)
 	struct zynqmp_dp *dp = container_of(work, struct zynqmp_dp, hpd_work);
 	enum drm_connector_status status;
 
-	mutex_lock(&dp->lock);
-	if (dp->ignore_hpd) {
-		mutex_unlock(&dp->lock);
-		return;
-	}
+	scoped_guard(mutex, &dp->lock) {
+		if (dp->ignore_hpd)
+			return;
 
-	status = __zynqmp_dp_bridge_detect(dp);
-	mutex_unlock(&dp->lock);
+		status = __zynqmp_dp_bridge_detect(dp);
+	}
 
 	drm_bridge_hpd_notify(&dp->bridge, status);
 }
@@ -2410,11 +2338,9 @@ static void zynqmp_dp_hpd_irq_work_func(struct work_struct *work)
 	u8 status[DP_LINK_STATUS_SIZE + 2];
 	int err;
 
-	mutex_lock(&dp->lock);
-	if (dp->ignore_hpd) {
-		mutex_unlock(&dp->lock);
+	guard(mutex)(&dp->lock);
+	if (dp->ignore_hpd)
 		return;
-	}
 
 	err = drm_dp_dpcd_read(&dp->aux, DP_SINK_COUNT, status,
 			       DP_LINK_STATUS_SIZE + 2);
@@ -2428,7 +2354,6 @@ static void zynqmp_dp_hpd_irq_work_func(struct work_struct *work)
 			zynqmp_dp_train_loop(dp);
 		}
 	}
-	mutex_unlock(&dp->lock);
 }
 
 static irqreturn_t zynqmp_dp_irq_handler(int irq, void *data)
@@ -2483,12 +2408,11 @@ int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub)
 	struct platform_device *pdev = to_platform_device(dpsub->dev);
 	struct drm_bridge *bridge;
 	struct zynqmp_dp *dp;
-	struct resource *res;
 	int ret;
 
-	dp = kzalloc(sizeof(*dp), GFP_KERNEL);
-	if (!dp)
-		return -ENOMEM;
+	dp = devm_drm_bridge_alloc(&pdev->dev, struct zynqmp_dp, bridge, &zynqmp_dp_bridge_funcs);
+	if (IS_ERR(dp))
+		return PTR_ERR(dp);
 
 	dp->dev = &pdev->dev;
 	dp->dpsub = dpsub;
@@ -2500,35 +2424,26 @@ int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub)
 	INIT_WORK(&dp->hpd_irq_work, zynqmp_dp_hpd_irq_work_func);
 
 	/* Acquire all resources (IOMEM, IRQ and PHYs). */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dp");
-	dp->iomem = devm_ioremap_resource(dp->dev, res);
-	if (IS_ERR(dp->iomem)) {
-		ret = PTR_ERR(dp->iomem);
-		goto err_free;
-	}
+	dp->iomem = devm_platform_ioremap_resource_byname(pdev, "dp");
+	if (IS_ERR(dp->iomem))
+		return PTR_ERR(dp->iomem);
 
 	dp->irq = platform_get_irq(pdev, 0);
-	if (dp->irq < 0) {
-		ret = dp->irq;
-		goto err_free;
-	}
+	if (dp->irq < 0)
+		return dp->irq;
 
 	dp->reset = devm_reset_control_get(dp->dev, NULL);
-	if (IS_ERR(dp->reset)) {
-		if (PTR_ERR(dp->reset) != -EPROBE_DEFER)
-			dev_err(dp->dev, "failed to get reset: %ld\n",
-				PTR_ERR(dp->reset));
-		ret = PTR_ERR(dp->reset);
-		goto err_free;
-	}
+	if (IS_ERR(dp->reset))
+		return dev_err_probe(dp->dev, PTR_ERR(dp->reset),
+				    "failed to get reset\n");
 
 	ret = zynqmp_dp_reset(dp, true);
 	if (ret < 0)
-		goto err_free;
+		return ret;
 
 	ret = zynqmp_dp_reset(dp, false);
 	if (ret < 0)
-		goto err_free;
+		return ret;
 
 	ret = zynqmp_dp_phy_probe(dp);
 	if (ret)
@@ -2536,7 +2451,6 @@ int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub)
 
 	/* Initialize the bridge. */
 	bridge = &dp->bridge;
-	bridge->funcs = &zynqmp_dp_bridge_funcs;
 	bridge->ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
 		    | DRM_BRIDGE_OP_HPD;
 	bridge->type = DRM_MODE_CONNECTOR_DisplayPort;
@@ -2589,8 +2503,6 @@ err_phy_exit:
 	zynqmp_dp_phy_exit(dp);
 err_reset:
 	zynqmp_dp_reset(dp, true);
-err_free:
-	kfree(dp);
 	return ret;
 }