drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()
Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210924064324.229457-16-greenfoo@u92.eu

drivers/gpu/drm/amd/amdgpu/amdgpu_display.c

@@ -40,6 +40,7 @@
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_vblank.h>
+#include <drm/drm_drv.h>
 
 static void amdgpu_display_flip_callback(struct dma_fence *f,
 					 struct dma_fence_cb *cb)
@@ -1543,16 +1544,21 @@ int amdgpu_display_suspend_helper(struct amdgpu_device *adev)
 	struct drm_crtc *crtc;
 	struct drm_connector *connector;
 	struct drm_connector_list_iter iter;
-	int r;
+	struct drm_modeset_acquire_ctx ctx;
+	int r, ret;
 
 	/* turn off display hw */
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	drm_connector_list_iter_begin(dev, &iter);
 	drm_for_each_connector_iter(connector, &iter)
 		drm_helper_connector_dpms(connector,
 					  DRM_MODE_DPMS_OFF);
 	drm_connector_list_iter_end(&iter);
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (ret)
+		return ret;
+
 	/* unpin the front buffers and cursors */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
@@ -1590,7 +1596,8 @@ int amdgpu_display_resume_helper(struct amdgpu_device *adev)
 	struct drm_connector *connector;
 	struct drm_connector_list_iter iter;
 	struct drm_crtc *crtc;
-	int r;
+	struct drm_modeset_acquire_ctx ctx;
+	int r, ret;
 
 	/* pin cursors */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
@@ -1612,7 +1619,7 @@ int amdgpu_display_resume_helper(struct amdgpu_device *adev)
 	drm_helper_resume_force_mode(dev);
 
 	/* turn on display hw */
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	drm_connector_list_iter_begin(dev, &iter);
 	drm_for_each_connector_iter(connector, &iter)
@@ -1620,8 +1627,8 @@ int amdgpu_display_resume_helper(struct amdgpu_device *adev)
 					  DRM_MODE_DPMS_ON);
 	drm_connector_list_iter_end(&iter);
 
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
-	return 0;
+	return ret;
 }
 

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -80,6 +80,7 @@
 #include <drm/drm_edid.h>
 #include <drm/drm_vblank.h>
 #include <drm/drm_audio_component.h>
+#include <drm/drm_drv.h>
 
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 #include "ivsrcid/dcn/irqsrcs_dcn_1_0.h"
@@ -2621,6 +2622,9 @@ static void handle_hpd_irq(void *param)
 #ifdef CONFIG_DRM_AMD_DC_HDCP
 	struct dm_connector_state *dm_con_state = to_dm_connector_state(connector->state);
 #endif
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
+
 
 	if (adev->dm.disable_hpd_irq)
 		return;
@@ -2646,14 +2650,6 @@ static void handle_hpd_irq(void *param)
 	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)
@@ -2661,13 +2657,18 @@ static void handle_hpd_irq(void *param)
 
 		amdgpu_dm_update_connector_after_detect(aconnector);
 
-		drm_modeset_lock_all(dev);
+	} else {
+		goto out;
+	}
+
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
 		drm_kms_helper_hotplug_event(dev);
-	}
+
+out:
 	mutex_unlock(&aconnector->hpd_lock);
 
 }
@@ -2756,12 +2757,14 @@ static void handle_hpd_rx_irq(void *param)
 	struct drm_connector *connector = &aconnector->base;
 	struct drm_device *dev = connector->dev;
 	struct dc_link *dc_link = aconnector->dc_link;
+	struct drm_modeset_acquire_ctx ctx;
 	bool is_mst_root_connector = aconnector->mst_mgr.mst_state;
 	bool result = false;
 	enum dc_connection_type new_connection_type = dc_connection_none;
 	struct amdgpu_device *adev = drm_to_adev(dev);
 	union hpd_irq_data hpd_irq_data;
 	bool lock_flag = 0;
+	int ret;
 
 	memset(&hpd_irq_data, 0, sizeof(hpd_irq_data));
 
@@ -2828,12 +2831,6 @@ 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)
@@ -2841,14 +2838,17 @@ static void handle_hpd_rx_irq(void *param)
 
 			amdgpu_dm_update_connector_after_detect(aconnector);
 
+		} else {
+			goto finish;
+		}
 
-			drm_modeset_lock_all(dev);
+		DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 		dm_restore_drm_connector_state(dev, connector);
-			drm_modeset_unlock_all(dev);
+		DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 		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)

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

@@ -24,6 +24,7 @@
  */
 
 #include <linux/uaccess.h>
+#include <drm/drm_drv.h>
 
 #include "dc.h"
 #include "amdgpu.h"
@@ -1191,12 +1192,14 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 	struct drm_connector *connector = &aconnector->base;
 	struct dc_link *link = NULL;
 	struct drm_device *dev = connector->dev;
+	struct drm_modeset_acquire_ctx ctx;
 	enum dc_connection_type new_connection_type = dc_connection_none;
 	char *wr_buf = NULL;
 	uint32_t wr_buf_size = 42;
 	int max_param_num = 1;
 	long param[1] = {0};
 	uint8_t param_nums = 0;
+	int ret;
 
 	if (!aconnector || !aconnector->dc_link)
 		return -EINVAL;
@@ -1236,12 +1239,6 @@ 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;
@@ -1259,12 +1256,18 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 
 		amdgpu_dm_update_connector_after_detect(aconnector);
 
-		drm_modeset_lock_all(dev);
+	} else {
+		goto unlock;
+	}
+
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (ret)
+		return ret;
 
 	drm_kms_helper_hotplug_event(dev);
-	}
 
 unlock:
 	mutex_unlock(&aconnector->hpd_lock);