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drm/vmwgfx: Fix corner case screen target management 

When the surface backing a framebuffer doesn't match the framebuffer's
dimensions, the screen target code would test the framebuffer dimensions
rather than the surface dimensions when deciding whether to bind the
surface as a screen target directly. This causes a screen target -
surface dimension mismatch and a subsequent device error.

Fix this by testing against the surface dimension.

v2: Fix review comments by Sinclair Yeh.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Cc: <stable@vger.kernel.org>
hifive-unleashed-5.1
Thomas Hellstrom 2016-06-29 13:37:35 -07:00 committed by Sinclair Yeh
parent d5f1a291e3
commit beca4cf553
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
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@ -399,8 +399,10 @@ static int vmw_stdu_bind_fb(struct vmw_private *dev_priv,
WARN_ON_ONCE(!stdu->defined);
if (!vfb->dmabuf && new_fb->width == mode->hdisplay &&
new_fb->height == mode->vdisplay)
new_vfbs = (vfb->dmabuf) ? NULL : vmw_framebuffer_to_vfbs(new_fb);
if (new_vfbs && new_vfbs->surface->base_size.width == mode->hdisplay &&
new_vfbs->surface->base_size.height == mode->vdisplay)
new_content_type = SAME_AS_DISPLAY;
else if (vfb->dmabuf)
new_content_type = SEPARATE_DMA;
@ -444,7 +446,6 @@ static int vmw_stdu_bind_fb(struct vmw_private *dev_priv,
content_srf.mip_levels[0] = 1;
content_srf.multisample_count = 0;
} else {
new_vfbs = vmw_framebuffer_to_vfbs(new_fb);
content_srf = *new_vfbs->surface;
}
@ -464,7 +465,6 @@ static int vmw_stdu_bind_fb(struct vmw_private *dev_priv,
return ret;
}
} else if (new_content_type == SAME_AS_DISPLAY) {
new_vfbs = vmw_framebuffer_to_vfbs(new_fb);
new_display_srf = vmw_surface_reference(new_vfbs->surface);
}