linux-kernel - [PATCH v4 17/20] drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL

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Date:   Wed, 13 Oct 2021 22:48:43 +0200
From:   Fernando Ramos <greenfoo@....eu>
To:     dri-devel@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org, sean@...rly.run,
        linux-doc@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        linux-renesas-soc@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: [PATCH v4 17/20] drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() [part 2]

Refactor places using drm_modeset_{lock,unlock}_all() so that they only
appear once per function.

This is needed so that in the next commit I can replace those functions
by the new macros (which use labels that can only appear once per
function).

Signed-off-by: Fernando Ramos <greenfoo@....eu>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 43 ++++++++-----------
 .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 18 +++-----
 2 files changed, 26 insertions(+), 35 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index f35561b5a465..10ed1f8ad514 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2935,13 +2935,6 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector)
 	if (aconnector->base.force && new_connection_type == dc_connection_none) {
 		emulated_link_detect(aconnector->dc_link);
 
-		drm_modeset_lock_all(dev);
-		dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
-
-		if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
-			drm_kms_helper_hotplug_event(dev);
-
 	} else if (dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD)) {
 		if (new_connection_type == dc_connection_none &&
 		    aconnector->dc_link->type == dc_connection_none &&
@@ -2950,13 +2943,18 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector)
 
 		amdgpu_dm_update_connector_after_detect(aconnector);
 
-		drm_modeset_lock_all(dev);
-		dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
-
-		if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
-			drm_kms_helper_hotplug_event(dev);
+	} else {
+		goto out;
 	}
+
+	drm_modeset_lock_all(dev);
+	dm_restore_drm_connector_state(dev, connector);
+	drm_modeset_unlock_all(dev);
+
+	if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
+		drm_kms_helper_hotplug_event(dev);
+
+out:
 	mutex_unlock(&aconnector->hpd_lock);
 
 }
@@ -3144,12 +3142,6 @@ static void handle_hpd_rx_irq(void *param)
 
 			amdgpu_dm_update_connector_after_detect(aconnector);
 
-
-			drm_modeset_lock_all(dev);
-			dm_restore_drm_connector_state(dev, connector);
-			drm_modeset_unlock_all(dev);
-
-			drm_kms_helper_hotplug_event(dev);
 		} else if (dc_link_detect(dc_link, DETECT_REASON_HPDRX)) {
 
 			if (aconnector->fake_enable)
@@ -3157,14 +3149,17 @@ static void handle_hpd_rx_irq(void *param)
 
 			amdgpu_dm_update_connector_after_detect(aconnector);
 
+		} else {
+			goto finish;
+		}
 
-			drm_modeset_lock_all(dev);
-			dm_restore_drm_connector_state(dev, connector);
-			drm_modeset_unlock_all(dev);
+		drm_modeset_lock_all(dev);
+		dm_restore_drm_connector_state(dev, connector);
+		drm_modeset_unlock_all(dev);
 
-			drm_kms_helper_hotplug_event(dev);
-		}
+		drm_kms_helper_hotplug_event(dev);
 	}
+finish:
 #ifdef CONFIG_DRM_AMD_DC_HDCP
 	if (hpd_irq_data.bytes.device_service_irq.bits.CP_IRQ) {
 		if (adev->dm.hdcp_workqueue)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index 814f67d86a3c..7751038d5788 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -1237,12 +1237,6 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 			goto unlock;
 
 		amdgpu_dm_update_connector_after_detect(aconnector);
-
-		drm_modeset_lock_all(dev);
-		dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
-
-		drm_kms_helper_hotplug_event(dev);
 	} else if (param[0] == 0) {
 		if (!aconnector->dc_link)
 			goto unlock;
@@ -1260,13 +1254,15 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 
 		amdgpu_dm_update_connector_after_detect(aconnector);
 
-		drm_modeset_lock_all(dev);
-		dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
-
-		drm_kms_helper_hotplug_event(dev);
+	} else {
+		goto unlock;
 	}
 
+	drm_modeset_lock_all(dev);
+	dm_restore_drm_connector_state(dev, connector);
+	drm_modeset_unlock_all(dev);
+	drm_kms_helper_hotplug_event(dev);
+
 unlock:
 	mutex_unlock(&aconnector->hpd_lock);
 
-- 
2.33.0