linux-toradex.git/drivers/gpu/drm/hyperv/hyperv_drm_drv.c, branch v6.0-rc4

drm/hyperv : Removing the restruction of VRAM allocation with PCI bar size

2022-05-30T22:25:36+00:00

There were two different approaches getting used in this driver to
allocate vram:
	1. VRAM allocation from PCI region for Gen1
	2. VRAM alloaction from MMIO region for Gen2
First approach limilts the vram to PCI BAR size, which is 64 MB in most
legacy systems. This limits the maximum resolution to be restricted to
64 MB size, and with recent conclusion on fbdev issue its concluded to have
similar allocation strategy for both Gen1 and Gen2. This patch unifies
the Gen1 and Gen2 vram allocation strategy.

Signed-off-by: Saurabh Sengar 
Reviewed-by: Deepak Rawat 
Signed-off-by: Deepak Rawat 
Link: https://patchwork.freedesktop.org/patch/msgid/1653143019-20032-1-git-send-email-ssengar@linux.microsoft.com

drm/hyperv: Add support for the nomodeset kernel parameter

2022-01-27T18:15:48+00:00

According to disable Documentation/admin-guide/kernel-parameters.txt, this
parameter can be used to disable kernel modesetting.

DRM drivers will not perform display-mode changes or accelerated rendering
and only the system framebuffer will be available if it was set-up.

But only a few DRM drivers currently check for nomodeset, make this driver
to also support the command line parameter.

Signed-off-by: Javier Martinez Canillas 
Acked-by: Deepak Rawat 
Acked-by: Daniel Vetter 
Link: https://patchwork.freedesktop.org/patch/msgid/20211217003752.3946210-25-javierm@redhat.com

drm/hyperv: Fix device removal on Gen1 VMs

2021-11-23T18:56:12+00:00

The Hyper-V DRM driver tries to free MMIO region on removing
the device regardless of VM type, while Gen1 VMs don't use MMIO
and hence causing the kernel to crash on a NULL pointer dereference.

Fix this by making deallocating MMIO only on Gen2 machines and implement
removal for Gen1

Fixes: 76c56a5affeb ("drm/hyperv: Add DRM driver for hyperv synthetic video device")

Signed-off-by: Mohammed Gamal 
Reviewed-by: Deepak Rawat 
Signed-off-by: Deepak Rawat 
Link: https://patchwork.freedesktop.org/patch/msgid/20211119112900.300537-1-mgamal@redhat.com

drm/aperture: Pass DRM driver structure instead of driver name

2021-07-01T09:11:55+00:00

Print the name of the DRM driver when taking over fbdev devices. Makes
the output to dmesg more consistent. Note that the driver name is only
used for printing a string to the kernel log. No UAPI is affected by this
change.

Signed-off-by: Thomas Zimmermann 
Acked-by: Nirmoy Das 
Acked-by: Chen-Yu Tsai  # sun4i
Acked-by: Neil Armstrong  # meson
Link: https://patchwork.freedesktop.org/patch/msgid/20210629135833.22679-1-tzimmermann@suse.de

drm/hyperv: Handle feature change message from device

2021-06-07T15:04:10+00:00

Virtual device inform if screen update is needed or not with
SYNTHVID_FEATURE_CHANGE message. Handle this message to set dirt_needed
flag.

Suggested-by: Dexuan Cui 
Signed-off-by: Deepak Rawat 
Acked-by: Thomas Zimmermann 
Link: https://patchwork.freedesktop.org/patch/msgid/20210527112230.1274-2-drawat.floss@gmail.com

drm/hyperv: Add DRM driver for hyperv synthetic video device

2021-06-07T15:04:10+00:00

DRM driver for hyperv synthetic video device, based on hyperv_fb
framebuffer driver. Also added config option "DRM_HYPERV" to enabled
this driver.

v2:
- Add support for gen2 VM
- Fixed review comments

v3:
- Split into multiple files as suggested by Thomas Zimmermann
- Fixed hibernation issue as suggested by Dexuan Cui
- Use ioremap_cache as suggested by Dexuan Cui
- Incorporated other review comments

v4:
- Fix bitrotted code
- Review comments
- Updated the copyright and license to match hyperv_fb

v5:
- Address review comments and rebased with drm-misc-next

v6:
- Minor code/comment improvement as suggested by Dexuan Cui

Signed-off-by: Deepak Rawat 
Acked-by: Thomas Zimmermann 
Link: https://patchwork.freedesktop.org/patch/msgid/20210527112230.1274-1-drawat.floss@gmail.com