On Mon, Jun 22, 2020 at 1:07 PM Deepak Rawat drawat.floss@gmail.com wrote:
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?
Simple is for really simple framebuffers, if you want a few planes or multiple outputs or multiple crtcs then just write a normal drm driver. We've worked hard to ditch all the boilerplate and replace it with defaults, so the difference isn't much, and if we don't keep simple helpers really simple there's not much point.
Also once you don't use simple helpers anymore I think migrating out of drm/tiny is probably a good idea. -Daniel
For testing, ran GNOME and Weston with current changes in a Linux VM on Windows 10 with hyper-v enabled.
Thanks, Deepak
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
-- 2.27.0