On Mon, May 2, 2022 at 9:37 AM Michael Kelley <mikelley@xxxxxxxxxxxxx> wrote:
>
> The DRM Hyper-V driver has special case code for running on the first
> released versions of Hyper-V: 2008 and 2008 R2/Windows 7. These versions
> are now out of support (except for extended security updates) and lack
> support for performance features that are needed for effective production
> usage of Linux guests.
>
> The negotiation of the VMbus protocol versions required by these old
> Hyper-V versions has been removed from the VMbus driver. So now remove
> the handling of these VMbus protocol versions from the DRM Hyper-V
> driver.
>
> Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/hyperv/hyperv_drm_proto.c | 23 +++++++----------------
> 1 file changed, 7 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c
> index c0155c6..76a182a 100644
> --- a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c
> +++ b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c
> @@ -18,16 +18,16 @@
> #define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major))
> #define SYNTHVID_VER_GET_MAJOR(ver) (ver & 0x0000ffff)
> #define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16)
> +
> +/* Support for VERSION_WIN7 is removed. #define is retained for reference. */
> #define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0)
> #define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2)
> #define SYNTHVID_VERSION_WIN10 SYNTHVID_VERSION(3, 5)
>
> -#define SYNTHVID_DEPTH_WIN7 16
> #define SYNTHVID_DEPTH_WIN8 32
> -#define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024)
> +#define SYNTHVID_WIDTH_WIN8 1600
> +#define SYNTHVID_HEIGHT_WIN8 1200
> #define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024)
> -#define SYNTHVID_WIDTH_MAX_WIN7 1600
> -#define SYNTHVID_HEIGHT_MAX_WIN7 1200
>
> enum pipe_msg_type {
> PIPE_MSG_INVALID,
> @@ -496,12 +496,6 @@ int hyperv_connect_vsp(struct hv_device *hdev)
> case VERSION_WIN8:
> case VERSION_WIN8_1:
> ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN8);
> - if (!ret)
> - break;
> - fallthrough;
> - case VERSION_WS2008:
> - case VERSION_WIN7:
> - ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN7);
> break;
> default:
> ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10);
> @@ -513,18 +507,15 @@ int hyperv_connect_vsp(struct hv_device *hdev)
> goto error;
> }
>
> - if (hv->synthvid_version == SYNTHVID_VERSION_WIN7)
> - hv->screen_depth = SYNTHVID_DEPTH_WIN7;
> - else
> - hv->screen_depth = SYNTHVID_DEPTH_WIN8;
> + hv->screen_depth = SYNTHVID_DEPTH_WIN8;
>
> if (hyperv_version_ge(hv->synthvid_version, SYNTHVID_VERSION_WIN10)) {
> ret = hyperv_get_supported_resolution(hdev);
> if (ret)
> drm_err(dev, "Failed to get supported resolution from host, use default\n");
> } else {
> - hv->screen_width_max = SYNTHVID_WIDTH_MAX_WIN7;
> - hv->screen_height_max = SYNTHVID_HEIGHT_MAX_WIN7;
> + hv->screen_width_max = SYNTHVID_WIDTH_WIN8;
> + hv->screen_height_max = SYNTHVID_HEIGHT_WIN8;
> }
>
> hv->mmio_megabytes = hdev->channel->offermsg.offer.mmio_megabytes;
Do we need a new version for Windows 11? If the synthetic device
version is decoupled from Windows version, then I guess we can rename
the macro to reflect that.
Reviewed-by: Deepak Rawat <drawat.floss@xxxxxxxxx>
> --
> 1.8.3.1
>
