diff options
author | Gerd Hoffmann <kraxel@redhat.com> | 2019-01-18 15:20:11 +0300 |
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committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-01-28 16:24:53 +0300 |
commit | 90adda2ce898c7a76d1a55d4650ade8cc957e54f (patch) | |
tree | 8ff81fbab03a1c28b2f93e1c88b4382036384e43 /drivers/gpu/drm/qxl/qxl_drv.h | |
parent | 4979904c62b9c0af492e679fb04f675ad5f238f2 (diff) | |
download | linux-90adda2ce898c7a76d1a55d4650ade8cc957e54f.tar.xz |
drm/qxl: cover all crtcs in shadow bo.
The qxl device supports only a single active framebuffer ("primary
surface" in spice terminology). In multihead configurations are handled
by defining rectangles within the primary surface for each head/crtc.
Userspace which uses the qxl ioctl interface (xorg qxl driver) is aware
of this limitation and will setup framebuffers and crtcs accordingly.
Userspace which uses dumb framebuffers (xorg modesetting driver,
wayland) is not aware of this limitation and tries to use two
framebuffers (one for each crtc) instead.
The qxl kms driver already has the dumb bo separated from the primary
surface, by using a (shared) shadow bo as primary surface. This is
needed to support pageflips without having to re-create the primary
surface. The qxl driver will blit from the dumb bo to the shadow bo
instead.
So we can extend the shadow logic: Maintain a global shadow bo (aka
primary surface), make it big enough that dumb bo's for all crtcs fit in
side-by-side. Adjust the pageflip blits to place the heads next to each
other in the shadow.
With this patch in place multihead qxl works with wayland.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190118122020.27596-15-kraxel@redhat.com
Diffstat (limited to 'drivers/gpu/drm/qxl/qxl_drv.h')
-rw-r--r-- | drivers/gpu/drm/qxl/qxl_drv.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h index 150b1a4f667a..43c6df9cf98e 100644 --- a/drivers/gpu/drm/qxl/qxl_drv.h +++ b/drivers/gpu/drm/qxl/qxl_drv.h @@ -230,6 +230,8 @@ struct qxl_device { struct qxl_ram_header *ram_header; struct qxl_bo *primary_bo; + struct qxl_bo *dumb_shadow_bo; + struct qxl_head *dumb_heads; struct qxl_memslot main_slot; struct qxl_memslot surfaces_slot; @@ -437,7 +439,8 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev, struct qxl_bo *bo, unsigned int flags, unsigned int color, struct drm_clip_rect *clips, - unsigned int num_clips, int inc); + unsigned int num_clips, int inc, + uint32_t dumb_shadow_offset); void qxl_draw_fill(struct qxl_draw_fill *qxl_draw_fill_rec); |