This is a note to let you know that I've just added the patch titled
drm/vmwgfx: Delay pinning fbdev framebuffer until after mode set
to the 4.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-vmwgfx-delay-pinning-fbdev-framebuffer-until-after-mode-set.patch
and it can be found in the queue-4.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d5f1a291e32309324a8c481ed84b5c118d1360ea Mon Sep 17 00:00:00 2001
From: Sinclair Yeh <syeh@xxxxxxxxxx>
Date: Wed, 29 Jun 2016 13:23:18 -0700
Subject: drm/vmwgfx: Delay pinning fbdev framebuffer until after mode set
From: Sinclair Yeh <syeh@xxxxxxxxxx>
commit d5f1a291e32309324a8c481ed84b5c118d1360ea upstream.
For the Screen Object display unit, we need to reserve a
guest-invisible region equal to the size of the framebuffer for
the host. This region can only be reserved in VRAM, whereas
the guest-visible framebuffer can be reserved in either VRAM or
GMR.
As such priority should be given to the guest-invisible
region otherwise in a limited VRAM situation, we can fail to
allocate this region.
This patch makes it so that vmw_sou_backing_alloc() is called
before the framebuffer is pinned.
Signed-off-by: Sinclair Yeh <syeh@xxxxxxxxxx>
Reviewed-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/vmwgfx/vmwgfx_fb.c | 47 +++++++++++++++++++------------------
1 file changed, 25 insertions(+), 22 deletions(-)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
@@ -517,28 +517,6 @@ static int vmw_fb_kms_framebuffer(struct
par->set_fb = &vfb->base;
- if (!par->bo_ptr) {
- /*
- * Pin before mapping. Since we don't know in what placement
- * to pin, call into KMS to do it for us.
- */
- ret = vfb->pin(vfb);
- if (ret) {
- DRM_ERROR("Could not pin the fbdev framebuffer.\n");
- return ret;
- }
-
- ret = ttm_bo_kmap(&par->vmw_bo->base, 0,
- par->vmw_bo->base.num_pages, &par->map);
- if (ret) {
- vfb->unpin(vfb);
- DRM_ERROR("Could not map the fbdev framebuffer.\n");
- return ret;
- }
-
- par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &par->bo_iowrite);
- }
-
return 0;
}
@@ -601,6 +579,31 @@ static int vmw_fb_set_par(struct fb_info
if (ret)
goto out_unlock;
+ if (!par->bo_ptr) {
+ struct vmw_framebuffer *vfb = vmw_framebuffer_to_vfb(set.fb);
+
+ /*
+ * Pin before mapping. Since we don't know in what placement
+ * to pin, call into KMS to do it for us.
+ */
+ ret = vfb->pin(vfb);
+ if (ret) {
+ DRM_ERROR("Could not pin the fbdev framebuffer.\n");
+ return ret;
+ }
+
+ ret = ttm_bo_kmap(&par->vmw_bo->base, 0,
+ par->vmw_bo->base.num_pages, &par->map);
+ if (ret) {
+ vfb->unpin(vfb);
+ DRM_ERROR("Could not map the fbdev framebuffer.\n");
+ return ret;
+ }
+
+ par->bo_ptr = ttm_kmap_obj_virtual(&par->map, &par->bo_iowrite);
+ }
+
+
vmw_fb_dirty_mark(par, par->fb_x, par->fb_y,
par->set_fb->width, par->set_fb->height);
Patches currently in stable-queue which might be from syeh@xxxxxxxxxx are
queue-4.6/drm-ttm-make-ttm_bo_mem_compat-available.patch
queue-4.6/drm-vmwgfx-delay-pinning-fbdev-framebuffer-until-after-mode-set.patch
queue-4.6/drm-vmwgfx-add-an-option-to-change-assumed-fb-bpp.patch
queue-4.6/drm-vmwgfx-fix-corner-case-screen-target-management.patch
queue-4.6/drm-vmwgfx-check-pin-count-before-attempting-to-move-a-buffer.patch
queue-4.6/drm-vmwgfx-work-around-mode-set-failure-in-2d-vms.patch
queue-4.6/drm-vmwgfx-fix-error-paths-when-mapping-framebuffer.patch
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