[PATCH 4.19 36/44] drm/i915/gvt: Fix tiled memory decoding bug on BDW

[Greg Kroah-Hartman]

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tina Zhang <tina.zhang@xxxxxxxxx>

commit a40fa231bb64b33e2cd54cf8ef44a9f89875fa11 upstream.

Commit b244ffa15c8b ("drm/i915/gvt: Fix drm_format_mod value for vGPU
plane") introduced a regression issue to the tiled memory decoding on BDW.

This patch can fix this issue.

Here is the issue detail: https://github.com/intel/gvt-linux/issues/61

v1->v2:
- Refine the commit message. (Zhenyu)

Fixes: b244ffa15c8b("drm/i915/gvt: Fix drm_format_mod value for vGPU plane")
Signed-off-by: Tina Zhang <tina.zhang@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.19+
Cc: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
Signed-off-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/i915/gvt/fb_decoder.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/gvt/fb_decoder.c
+++ b/drivers/gpu/drm/i915/gvt/fb_decoder.c
@@ -235,7 +235,7 @@ int intel_vgpu_decode_primary_plane(stru
 		plane->bpp = skl_pixel_formats[fmt].bpp;
 		plane->drm_format = skl_pixel_formats[fmt].drm_format;
 	} else {
-		plane->tiled = !!(val & DISPPLANE_TILED);
+		plane->tiled = val & DISPPLANE_TILED;
 		fmt = bdw_format_to_drm(val & DISPPLANE_PIXFORMAT_MASK);
 		plane->bpp = bdw_pixel_formats[fmt].bpp;
 		plane->drm_format = bdw_pixel_formats[fmt].drm_format;