drm-qemu: virtio sparse fix, MAINTAINERS updates.

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Merge tag 'drm-qemu-20170110' of git://git.kraxel.org/linux into drm-fixes

drm-qemu: virtio sparse fix, MAINTAINERS updates.

* tag 'drm-qemu-20170110' of git://git.kraxel.org/linux:
  drm: flip cirrus driver status to "obsolete".
  drm: update MAINTAINERS for qemu drivers (bochs, cirrus, qxl, virtio-gpu)
  drm/virtio: fix framebuffer sparse warning

MAINTAINERS

@@ -4106,12 +4106,18 @@ F:	drivers/gpu/drm/bridge/
 
 DRM DRIVER FOR BOCHS VIRTUAL GPU
 M:	Gerd Hoffmann <kraxel@redhat.com>
-S:	Odd Fixes
+L:	virtualization@lists.linux-foundation.org
+T:	git git://git.kraxel.org/linux drm-qemu
+S:	Maintained
 F:	drivers/gpu/drm/bochs/
 
 DRM DRIVER FOR QEMU'S CIRRUS DEVICE
 M:	Dave Airlie <airlied@redhat.com>
-S:	Odd Fixes
+M:	Gerd Hoffmann <kraxel@redhat.com>
+L:	virtualization@lists.linux-foundation.org
+T:	git git://git.kraxel.org/linux drm-qemu
+S:	Obsolete
+W:	https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/
 F:	drivers/gpu/drm/cirrus/
 
 RADEON and AMDGPU DRM DRIVERS
@@ -4304,7 +4310,10 @@ F:	Documentation/devicetree/bindings/display/renesas,du.txt
 
 DRM DRIVER FOR QXL VIRTUAL GPU
 M:	Dave Airlie <airlied@redhat.com>
-S:	Odd Fixes
+M:	Gerd Hoffmann <kraxel@redhat.com>
+L:	virtualization@lists.linux-foundation.org
+T:	git git://git.kraxel.org/linux drm-qemu
+S:	Maintained
 F:	drivers/gpu/drm/qxl/
 F:	include/uapi/drm/qxl_drm.h
 
@@ -13085,6 +13094,7 @@ M:	David Airlie <airlied@linux.ie>
 M:	Gerd Hoffmann <kraxel@redhat.com>
 L:	dri-devel@lists.freedesktop.org
 L:	virtualization@lists.linux-foundation.org
+T:	git git://git.kraxel.org/linux drm-qemu
 S:	Maintained
 F:	drivers/gpu/drm/virtio/
 F:	include/uapi/linux/virtio_gpu.h

drivers/gpu/drm/cirrus/Kconfig

@@ -7,3 +7,12 @@ config DRM_CIRRUS_QEMU
 	 This is a KMS driver for emulated cirrus device in qemu.
 	 It is *NOT* intended for real cirrus devices. This requires
 	 the modesetting userspace X.org driver.
+
+	 Cirrus is obsolete, the hardware was designed in the 90ies
+	 and can't keep up with todays needs.  More background:
+	 https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/
+
+	 Better alternatives are:
+	   - stdvga (DRM_BOCHS, qemu -vga std, default in qemu 2.2+)
+	   - qxl (DRM_QXL, qemu -vga qxl, works best with spice)
+	   - virtio (DRM_VIRTIO_GPU), qemu -vga virtio)

drivers/gpu/drm/virtio/virtgpu_fb.c

@@ -331,7 +331,7 @@ static int virtio_gpufb_create(struct drm_fb_helper *helper,
 	info->fbops = &virtio_gpufb_ops;
 	info->pixmap.flags = FB_PIXMAP_SYSTEM;
 
-	info->screen_base = obj->vmap;
+	info->screen_buffer = obj->vmap;
 	info->screen_size = obj->gem_base.size;
 	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 	drm_fb_helper_fill_var(info, &vfbdev->helper,