linux-kernel - [PATCH] drm/virtio: add virtio-gpu-features debugfs file.

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Message-Id: <20190320083612.32067-1-kraxel@redhat.com>
Date:   Wed, 20 Mar 2019 09:36:12 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Gerd Hoffmann <kraxel@...hat.com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        virtualization@...ts.linux-foundation.org (open list:VIRTIO GPU DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] drm/virtio: add virtio-gpu-features debugfs file.

This file prints which features the virtio-gpu device has.

Also add "virtio-gpu-" prefix to the existing fence file,
to make clear this is a driver-specific debugfs file.

Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/gpu/drm/virtio/virtgpu_debugfs.c | 27 +++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_debugfs.c b/drivers/gpu/drm/virtio/virtgpu_debugfs.c
index 73dc99046c43..ed0fcda713c3 100644
--- a/drivers/gpu/drm/virtio/virtgpu_debugfs.c
+++ b/drivers/gpu/drm/virtio/virtgpu_debugfs.c
@@ -28,6 +28,30 @@
 
 #include "virtgpu_drv.h"
 
+static void virtio_add_bool(struct seq_file *m, const char *name,
+				    bool value)
+{
+	seq_printf(m, "%-16s : %s\n", name, value ? "yes" : "no");
+}
+
+static void virtio_add_int(struct seq_file *m, const char *name,
+				   int value)
+{
+	seq_printf(m, "%-16s : %d\n", name, value);
+}
+
+static int virtio_gpu_features(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct virtio_gpu_device *vgdev = node->minor->dev->dev_private;
+
+	virtio_add_bool(m, "virgl", vgdev->has_virgl_3d);
+	virtio_add_bool(m, "edid", vgdev->has_edid);
+	virtio_add_int(m, "cap sets", vgdev->num_capsets);
+	virtio_add_int(m, "scanouts", vgdev->num_scanouts);
+	return 0;
+}
+
 static int
 virtio_gpu_debugfs_irq_info(struct seq_file *m, void *data)
 {
@@ -41,7 +65,8 @@ virtio_gpu_debugfs_irq_info(struct seq_file *m, void *data)
 }
 
 static struct drm_info_list virtio_gpu_debugfs_list[] = {
-	{ "irq_fence", virtio_gpu_debugfs_irq_info, 0, NULL },
+	{ "virtio-gpu-features", virtio_gpu_features },
+	{ "virtio-gpu-irq-fence", virtio_gpu_debugfs_irq_info, 0, NULL },
 };
 
 #define VIRTIO_GPU_DEBUGFS_ENTRIES ARRAY_SIZE(virtio_gpu_debugfs_list)
-- 
2.18.1