linux-kernel - [PATCH 4.14 49/64] drm/atomic: Use drm_drv_uses_atomic

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Date:   Thu, 27 Sep 2018 11:04:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lyude Paul <lyude@...hat.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Sean Paul <seanpaul@...omium.org>
Subject: [PATCH 4.14 49/64] drm/atomic: Use drm_drv_uses_atomic_modeset() for debugfs creation

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lyude Paul <lyude@...hat.com>

commit 3c499ea0c662e2f38aafbd4f516b08aab8cfa0e5 upstream.

As pointed out by Daniel Vetter, we should be usinng
drm_drv_uses_atomic_modeset() for determining whether or not we want to
make the debugfs nodes for atomic instead of checking DRIVER_ATOMIC, as
the former isn't an accurate representation of whether or not the driver
is actually using atomic modesetting internally (even though it might
not be exposing atomic capabilities).

Signed-off-by: Lyude Paul <lyude@...hat.com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: stable@...r.kernel.org
Reviewed-by: Sean Paul <seanpaul@...omium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180917173733.21293-1-lyude@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/drm_atomic.c  |    2 +-
 drivers/gpu/drm/drm_debugfs.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1748,7 +1748,7 @@ static void __drm_state_dump(struct drm_
 	struct drm_connector *connector;
 	struct drm_connector_list_iter conn_iter;
 
-	if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
+	if (!drm_drv_uses_atomic_modeset(dev))
 		return;
 
 	list_for_each_entry(plane, &config->plane_list, head) {
--- a/drivers/gpu/drm/drm_debugfs.c
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -150,7 +150,7 @@ int drm_debugfs_init(struct drm_minor *m
 		return ret;
 	}
 
-	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
+	if (drm_drv_uses_atomic_modeset(dev)) {
 		ret = drm_atomic_debugfs_init(minor);
 		if (ret) {
 			DRM_ERROR("Failed to create atomic debugfs files\n");