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dm: virtio-gpu: EDID emulation of virtual monitor

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Extended display identification data(EDID) is a data to store
display timings which are supported by ACRN virtual monitor.
Virtio-gpu FE driver will request it to config crtc for display
resolutions.

Tracked-On: #7210
Signed-off-by: Sun, Peng <peng.p.sun@linux.intel.com>
Reviewed-by: Zhao, yakui <yakui.zhao@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>
This commit is contained in:
Sun, Peng
2022-02-28 21:27:37 +08:00
committed by acrnsi-robot
parent bca6464e9f
commit eba0820bc7
3 changed files with 506 additions and 1 deletions
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61
devicemodel/hw/pci/virtio/virtio_gpu.c
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@@ -113,6 +113,22 @@ struct virtio_gpu_ctrl_hdr {
uint8_t padding[3];
};
/*
* Command: VIRTIO_GPU_CMD_GET_EDID
*/
struct virtio_gpu_get_edid {
struct virtio_gpu_ctrl_hdr hdr;
uint32_t scanout;
uint32_t padding;
};
struct virtio_gpu_resp_edid {
struct virtio_gpu_ctrl_hdr hdr;
uint32_t size;
uint32_t padding;
uint8_t edid[1024];
};
/*
* Per-device struct
*/
@@ -243,14 +259,49 @@ virtio_gpu_cmd_unspec(struct virtio_gpu_command *cmd)
}
static void
virtio_gpu_notify_controlq(void *vdev, struct virtio_vq_info *vq)
virtio_gpu_update_resp_fence(struct virtio_gpu_ctrl_hdr *hdr,
struct virtio_gpu_ctrl_hdr *resp)
{
if ((hdr == NULL ) || (resp == NULL))
return;
if(hdr->flags & VIRTIO_GPU_FLAG_FENCE) {
resp->flags |= VIRTIO_GPU_FLAG_FENCE;
resp->fence_id = hdr->fence_id;
}
}
static void
virtio_gpu_cmd_get_edid(struct virtio_gpu_command *cmd)
{
struct virtio_gpu_get_edid req;
struct virtio_gpu_resp_edid resp;
struct virtio_gpu *gpu;
gpu = cmd->gpu;
memcpy(&req, cmd->iov[0].iov_base, sizeof(req));
cmd->iolen = sizeof(resp);
memset(&resp, 0, sizeof(resp));
/* Only one EDID block is enough */
resp.size = 128;
virtio_gpu_update_resp_fence(&cmd->hdr, &resp.hdr);
vdpy_get_edid(gpu->vdpy_handle, resp.edid, resp.size);
memcpy(cmd->iov[1].iov_base, &resp, sizeof(resp));
}
static void
virtio_gpu_ctrl_bh(void *data)
{
struct virtio_gpu *vdev;
struct virtio_vq_info *vq;
struct virtio_gpu_command cmd;
struct iovec iov[VIRTIO_GPU_MAXSEGS];
uint16_t flags[VIRTIO_GPU_MAXSEGS];
int n;
uint16_t idx;
vq = (struct virtio_vq_info *)data;
vdev = (struct virtio_gpu *)(vq->base);
cmd.gpu = vdev;
cmd.iolen = 0;
@@ -271,6 +322,8 @@ virtio_gpu_notify_controlq(void *vdev, struct virtio_vq_info *vq)
sizeof(struct virtio_gpu_ctrl_hdr));
switch (cmd.hdr.type) {
case VIRTIO_GPU_CMD_GET_EDID:
virtio_gpu_cmd_get_edid(&cmd);
default:
virtio_gpu_cmd_unspec(&cmd);
break;
@@ -281,6 +334,12 @@ virtio_gpu_notify_controlq(void *vdev, struct virtio_vq_info *vq)
vq_endchains(vq, 1); /* Generate interrupt if appropriate. */
}
static void
virtio_gpu_notify_controlq(void *vdev, struct virtio_vq_info *vq)
{
virtio_gpu_ctrl_bh(vq);
}
static void
virtio_gpu_notify_cursorq(void *vdev, struct virtio_vq_info *vq)
{