[RFC PATCH 0/2] DRM driver for hyper-v synthetic video device

Deepak Rawat drawat.floss at gmail.com
Mon Jun 22 11:06:21 UTC 2020

Hi All,

First draft of DRM driver for hyper-v synthetic video device. This synthetic
device is already supported by hyper-v and a corresponding framebuffer driver
exist at drivers/video/fbdev/hyperv_fb.c. With this patch, just reworked the
framebuffer driver into DRM, in doing so got mode-setting support. The code is
similar to cirrus DRM driver, using simple display pipe and shmem backed
GEM objects.

The device support more features like hardware cursor, EDID, multiple dirty
regions, etc, which were not supported with framebuffer driver. The plan is to
add support for those in future iteration. Wanted to get initial feedback and
discuss cursor support with simple kms helper. Is there any value to add cursor
support to drm_simple_kms_helper.c so that others can use it, or should I just
add cursor plane as device private? I believe we can still keep this driver
in drm/tiny?

For testing, ran GNOME and Weston with current changes in a Linux VM on
Windows 10 with hyper-v enabled.


Deepak Rawat (2):
  drm/hyperv: Add DRM driver for hyperv synthetic video device
  MAINTAINERS: Add maintainer for hyperv video device

 MAINTAINERS                       |    8 +
 drivers/gpu/drm/tiny/Kconfig      |    9 +
 drivers/gpu/drm/tiny/Makefile     |    1 +
 drivers/gpu/drm/tiny/hyperv_drm.c | 1007 +++++++++++++++++++++++++++++
 4 files changed, 1025 insertions(+)
 create mode 100644 drivers/gpu/drm/tiny/hyperv_drm.c


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