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drm/hyperv: Fix double mouse pointers

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Hyper-V supports a hardware cursor feature. It is not used by Linux VM,
but the Hyper-V host still draws a point as an extra mouse pointer,
which is unwanted, especially when Xorg is running.

The hyperv_fb driver uses synthvid_send_ptr() to hide the unwanted pointer.
When the hyperv_drm driver was developed, the function synthvid_send_ptr()
was not copied from the hyperv_fb driver. Fix the issue by adding the
function into hyperv_drm.

Fixes: 76c56a5affeb ("drm/hyperv: Add DRM driver for hyperv synthetic video device")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Deepak Rawat <drawat.floss@gmail.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210916193644.45650-1-decui@microsoft.com
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dexuan Cui 2021-09-16 12:36:44 -07:00 committed by Dave Airlie
parent b693e42921
commit b253c3026c
3 changed files with 55 additions and 1 deletions
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1
drivers/gpu/drm/hyperv/hyperv_drm.h
View File

@ -46,6 +46,7 @@ int hyperv_mode_config_init(struct hyperv_drm_device *hv);
int hyperv_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp);
int hyperv_update_situation(struct hv_device *hdev, u8 active, u32 bpp,
u32 w, u32 h, u32 pitch);
int hyperv_hide_hw_ptr(struct hv_device *hdev);
int hyperv_update_dirt(struct hv_device *hdev, struct drm_rect *rect);
int hyperv_connect_vsp(struct hv_device *hdev);

1
drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
View File

@ -101,6 +101,7 @@ static void hyperv_pipe_enable(struct drm_simple_display_pipe *pipe,
struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
hyperv_hide_hw_ptr(hv->hdev);
hyperv_update_situation(hv->hdev, 1, hv->screen_depth,
crtc_state->mode.hdisplay,
crtc_state->mode.vdisplay,

54
drivers/gpu/drm/hyperv/hyperv_drm_proto.c
View File

@ -299,6 +299,55 @@ int hyperv_update_situation(struct hv_device *hdev, u8 active, u32 bpp,
return 0;
}
/*
* Hyper-V supports a hardware cursor feature. It's not used by Linux VM,
* but the Hyper-V host still draws a point as an extra mouse pointer,
* which is unwanted, especially when Xorg is running.
*
* The hyperv_fb driver uses synthvid_send_ptr() to hide the unwanted
* pointer, by setting msg.ptr_pos.is_visible = 1 and setting the
* msg.ptr_shape.data. Note: setting msg.ptr_pos.is_visible to 0 doesn't
* work in tests.
*
* Copy synthvid_send_ptr() to hyperv_drm and rename it to
* hyperv_hide_hw_ptr(). Note: hyperv_hide_hw_ptr() is also called in the
* handler of the SYNTHVID_FEATURE_CHANGE event, otherwise the host still
* draws an extra unwanted mouse pointer after the VM Connection window is
* closed and reopened.
*/
int hyperv_hide_hw_ptr(struct hv_device *hdev)
{
struct synthvid_msg msg;
memset(&msg, 0, sizeof(struct synthvid_msg));
msg.vid_hdr.type = SYNTHVID_POINTER_POSITION;
msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
sizeof(struct synthvid_pointer_position);
msg.ptr_pos.is_visible = 1;
msg.ptr_pos.video_output = 0;
msg.ptr_pos.image_x = 0;
msg.ptr_pos.image_y = 0;
hyperv_sendpacket(hdev, &msg);
memset(&msg, 0, sizeof(struct synthvid_msg));
msg.vid_hdr.type = SYNTHVID_POINTER_SHAPE;
msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
sizeof(struct synthvid_pointer_shape);
msg.ptr_shape.part_idx = SYNTHVID_CURSOR_COMPLETE;
msg.ptr_shape.is_argb = 1;
msg.ptr_shape.width = 1;
msg.ptr_shape.height = 1;
msg.ptr_shape.hot_x = 0;
msg.ptr_shape.hot_y = 0;
msg.ptr_shape.data[0] = 0;
msg.ptr_shape.data[1] = 1;
msg.ptr_shape.data[2] = 1;
msg.ptr_shape.data[3] = 1;
hyperv_sendpacket(hdev, &msg);
return 0;
}
int hyperv_update_dirt(struct hv_device *hdev, struct drm_rect *rect)
{
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
@ -392,8 +441,11 @@ static void hyperv_receive_sub(struct hv_device *hdev)
return;
}
if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE)
if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) {
hv->dirt_needed = msg->feature_chg.is_dirt_needed;
if (hv->dirt_needed)
hyperv_hide_hw_ptr(hv->hdev);
}
}
static void hyperv_receive(void *ctx)