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Subject: Re: [PATCH] Add virtio gpu driver.
Hi,
> I guess I didn't do a good job at looking at your v2: Cursor is still
> using legacy interfaces and not a proper plane. Would be awesome if
> you could fix that up. Atomic drivers really shouldn't use the legacy
> cursor interfaces any more at all.
> -Daniel
Figured that one for the most part, see attached draft.
The only thing I'm wondering is how the hotspot is handled.
drm_mode_cursor_universal doesn't even look at req->hot_{x,y}.
/me looks confused.
cheers,
Gerd
From fb1d0700a46d850ec9f931304a9e99854a3ce5e9 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 26 May 2016 11:42:52 +0200
Subject: [PATCH] [wip] virtio-gpu: switch to atomic cursor interfaces
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
drivers/gpu/drm/virtio/virtgpu_display.c | 102 +++-----------------------
drivers/gpu/drm/virtio/virtgpu_drv.h | 1 +
drivers/gpu/drm/virtio/virtgpu_plane.c | 122 ++++++++++++++++++++++++-------
3 files changed, 109 insertions(+), 116 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index 5990cab..d6b16d1 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -29,8 +29,8 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>
-#define XRES_MIN 320
-#define YRES_MIN 200
+#define XRES_MIN 32
+#define YRES_MIN 32
#define XRES_DEF 1024
#define YRES_DEF 768
@@ -38,86 +38,6 @@
#define XRES_MAX 8192
#define YRES_MAX 8192
-static void
-virtio_gpu_hide_cursor(struct virtio_gpu_device *vgdev,
- struct virtio_gpu_output *output)
-{
- output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
- output->cursor.resource_id = 0;
- virtio_gpu_cursor_ping(vgdev, output);
-}
-
-static int virtio_gpu_crtc_cursor_set(struct drm_crtc *crtc,
- struct drm_file *file_priv,
- uint32_t handle,
- uint32_t width,
- uint32_t height,
- int32_t hot_x, int32_t hot_y)
-{
- struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
- struct virtio_gpu_output *output =
- container_of(crtc, struct virtio_gpu_output, crtc);
- struct drm_gem_object *gobj = NULL;
- struct virtio_gpu_object *qobj = NULL;
- struct virtio_gpu_fence *fence = NULL;
- int ret = 0;
-
- if (handle == 0) {
- virtio_gpu_hide_cursor(vgdev, output);
- return 0;
- }
-
- /* lookup the cursor */
- gobj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
- if (gobj == NULL)
- return -ENOENT;
-
- qobj = gem_to_virtio_gpu_obj(gobj);
-
- if (!qobj->hw_res_handle) {
- ret = -EINVAL;
- goto out;
- }
-
- virtio_gpu_cmd_transfer_to_host_2d(vgdev, qobj->hw_res_handle, 0,
- cpu_to_le32(64),
- cpu_to_le32(64),
- 0, 0, &fence);
- ret = virtio_gpu_object_reserve(qobj, false);
- if (!ret) {
- reservation_object_add_excl_fence(qobj->tbo.resv,
- &fence->f);
- fence_put(&fence->f);
- virtio_gpu_object_unreserve(qobj);
- virtio_gpu_object_wait(qobj, false);
- }
-
- output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
- output->cursor.resource_id = cpu_to_le32(qobj->hw_res_handle);
- output->cursor.hot_x = cpu_to_le32(hot_x);
- output->cursor.hot_y = cpu_to_le32(hot_y);
- virtio_gpu_cursor_ping(vgdev, output);
- ret = 0;
-
-out:
- drm_gem_object_unreference_unlocked(gobj);
- return ret;
-}
-
-static int virtio_gpu_crtc_cursor_move(struct drm_crtc *crtc,
- int x, int y)
-{
- struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
- struct virtio_gpu_output *output =
- container_of(crtc, struct virtio_gpu_output, crtc);
-
- output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
- output->cursor.pos.x = cpu_to_le32(x);
- output->cursor.pos.y = cpu_to_le32(y);
- virtio_gpu_cursor_ping(vgdev, output);
- return 0;
-}
-
static int virtio_gpu_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
@@ -164,8 +84,6 @@ static int virtio_gpu_page_flip(struct drm_crtc *crtc,
}
static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
- .cursor_set2 = virtio_gpu_crtc_cursor_set,
- .cursor_move = virtio_gpu_crtc_cursor_move,
.set_config = drm_atomic_helper_set_config,
.destroy = drm_crtc_cleanup,
@@ -406,7 +324,7 @@ static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
struct drm_connector *connector = &output->conn;
struct drm_encoder *encoder = &output->enc;
struct drm_crtc *crtc = &output->crtc;
- struct drm_plane *plane;
+ struct drm_plane *primary, *cursor;
output->index = index;
if (index == 0) {
@@ -415,14 +333,18 @@ static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
output->info.r.height = cpu_to_le32(YRES_DEF);
}
- plane = virtio_gpu_plane_init(vgdev, index);
- if (IS_ERR(plane))
- return PTR_ERR(plane);
- drm_crtc_init_with_planes(dev, crtc, plane, NULL,
+ primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index);
+ if (IS_ERR(primary))
+ return PTR_ERR(primary);
+ cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);
+ if (IS_ERR(cursor))
+ return PTR_ERR(cursor);
+ drm_crtc_init_with_planes(dev, crtc, primary, cursor,
&virtio_gpu_crtc_funcs, NULL);
drm_mode_crtc_set_gamma_size(crtc, 256);
drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
- plane->crtc = crtc;
+ primary->crtc = crtc;
+ cursor->crtc = crtc;
drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 8f486f4..a1f7e9d 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -335,6 +335,7 @@ void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);
/* virtio_gpu_plane.c */
struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
+ enum drm_plane_type type,
int index);
/* virtio_gpu_ttm.c */
diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
index 70b44a2..d68270f 100644
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -38,6 +38,10 @@ static const uint32_t virtio_gpu_formats[] = {
DRM_FORMAT_ABGR8888,
};
+static const uint32_t virtio_gpu_cursor_formats[] = {
+ DRM_FORMAT_ARGB8888,
+};
+
static void virtio_gpu_plane_destroy(struct drm_plane *plane)
{
kfree(plane);
@@ -63,39 +67,97 @@ static void virtio_gpu_plane_atomic_update(struct drm_plane *plane,
{
struct drm_device *dev = plane->dev;
struct virtio_gpu_device *vgdev = dev->dev_private;
- struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(plane->crtc);
+ struct virtio_gpu_output *output = NULL;
struct virtio_gpu_framebuffer *vgfb;
- struct virtio_gpu_object *bo;
+ struct virtio_gpu_fence *fence = NULL;
+ struct virtio_gpu_object *bo = NULL;
uint32_t handle;
+ int ret = 0;
+
+ if (plane->state->crtc)
+ output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
+ if (old_state->crtc)
+ output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
+ WARN_ON(!output);
if (plane->state->fb) {
vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
bo = gem_to_virtio_gpu_obj(vgfb->obj);
handle = bo->hw_res_handle;
- if (bo->dumb) {
- virtio_gpu_cmd_transfer_to_host_2d
- (vgdev, handle, 0,
- cpu_to_le32(plane->state->crtc_w),
- cpu_to_le32(plane->state->crtc_h),
- plane->state->crtc_x, plane->state->crtc_y, NULL);
- }
} else {
handle = 0;
}
- DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d\n", handle,
- plane->state->crtc_w, plane->state->crtc_h,
- plane->state->crtc_x, plane->state->crtc_y);
- virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
- plane->state->crtc_w,
- plane->state->crtc_h,
- plane->state->crtc_x,
- plane->state->crtc_y);
- virtio_gpu_cmd_resource_flush(vgdev, handle,
- plane->state->crtc_x,
- plane->state->crtc_y,
- plane->state->crtc_w,
- plane->state->crtc_h);
+ switch (plane->type) {
+ case DRM_PLANE_TYPE_CURSOR:
+ if (bo && bo->dumb && (plane->state->fb != old_state->fb)) {
+ /* new cursor -- update & wait */
+ virtio_gpu_cmd_transfer_to_host_2d
+ (vgdev, handle, 0,
+ cpu_to_le32(plane->state->crtc_w),
+ cpu_to_le32(plane->state->crtc_h),
+ 0, 0, &fence);
+ ret = virtio_gpu_object_reserve(bo, false);
+ if (!ret) {
+ reservation_object_add_excl_fence(bo->tbo.resv,
+ &fence->f);
+ fence_put(&fence->f);
+ fence = NULL;
+ virtio_gpu_object_unreserve(bo);
+ virtio_gpu_object_wait(bo, false);
+ }
+ }
+
+ if (plane->state->fb != old_state->fb) {
+ DRM_DEBUG("cursor update, handle %d, +%d+%d\n", handle,
+ plane->state->crtc_x,
+ plane->state->crtc_y);
+ output->cursor.hdr.type =
+ cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
+ output->cursor.resource_id = cpu_to_le32(handle);
+#if 0
+ output->cursor.hot_x = cpu_to_le32(hot_x);
+ output->cursor.hot_y = cpu_to_le32(hot_y);
+#endif
+ } else {
+ DRM_DEBUG("cursor move +%d+%d\n",
+ plane->state->crtc_x,
+ plane->state->crtc_y);
+ output->cursor.hdr.type =
+ cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
+ }
+ output->cursor.pos.x = cpu_to_le32(plane->state->crtc_x);
+ output->cursor.pos.y = cpu_to_le32(plane->state->crtc_y);
+ virtio_gpu_cursor_ping(vgdev, output);
+ break;
+
+ case DRM_PLANE_TYPE_PRIMARY:
+ DRM_DEBUG("primary, handle 0x%x, crtc %dx%d+%d+%d\n", handle,
+ plane->state->crtc_w, plane->state->crtc_h,
+ plane->state->crtc_x, plane->state->crtc_y);
+ if (bo && bo->dumb) {
+ virtio_gpu_cmd_transfer_to_host_2d
+ (vgdev, handle, 0,
+ cpu_to_le32(plane->state->crtc_w),
+ cpu_to_le32(plane->state->crtc_h),
+ plane->state->crtc_x, plane->state->crtc_y,
+ &fence);
+ }
+ virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
+ plane->state->crtc_w,
+ plane->state->crtc_h,
+ plane->state->crtc_x,
+ plane->state->crtc_y);
+ virtio_gpu_cmd_resource_flush(vgdev, handle,
+ plane->state->crtc_x,
+ plane->state->crtc_y,
+ plane->state->crtc_w,
+ plane->state->crtc_h);
+ break;
+
+ default:
+ WARN_ON(true);
+ }
}
@@ -105,21 +167,29 @@ static const struct drm_plane_helper_funcs virtio_gpu_plane_helper_funcs = {
};
struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
+ enum drm_plane_type type,
int index)
{
struct drm_device *dev = vgdev->ddev;
struct drm_plane *plane;
- int ret;
+ const uint32_t *formats;
+ int ret, nformats;
plane = kzalloc(sizeof(*plane), GFP_KERNEL);
if (!plane)
return ERR_PTR(-ENOMEM);
+ if (type == DRM_PLANE_TYPE_CURSOR) {
+ formats = virtio_gpu_cursor_formats;
+ nformats = ARRAY_SIZE(virtio_gpu_cursor_formats);
+ } else {
+ formats = virtio_gpu_formats;
+ nformats = ARRAY_SIZE(virtio_gpu_formats);
+ }
ret = drm_universal_plane_init(dev, plane, 1 << index,
&virtio_gpu_plane_funcs,
- virtio_gpu_formats,
- ARRAY_SIZE(virtio_gpu_formats),
- DRM_PLANE_TYPE_PRIMARY, NULL);
+ formats, nformats,
+ type, NULL);
if (ret)
goto err_plane_init;
--
1.8.3.1
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