[PATCH 2/2] drm/virtio: Include modifier as part of set_scanout_blob

[Vivek Kasireddy]

With new use-cases coming up that include virtio-gpu:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9592

the FB associated with a Guest blob may have a modifier. Therefore,
this modifier info needs to be included as part of set_scanout_blob.

Cc: Gerd Hoffmann <kraxel at redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy at intel.com>
---
 drivers/gpu/drm/virtio/virtgpu_display.c | 3 +++
 drivers/gpu/drm/virtio/virtgpu_vq.c      | 3 ++-
 include/uapi/linux/virtio_gpu.h          | 1 +
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index a6caebd4a0dd..e2e7e6c5cb91 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -344,6 +344,9 @@ int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
 	vgdev->ddev->mode_config.max_width = XRES_MAX;
 	vgdev->ddev->mode_config.max_height = YRES_MAX;
 
+	if (vgdev->has_resource_blob)
+		vgdev->ddev->mode_config.allow_fb_modifiers = true;
+
 	for (i = 0 ; i < vgdev->num_scanouts; ++i)
 		vgdev_output_init(vgdev, i);
 
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index cf84d382dd41..462f1beb9c11 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -34,7 +34,7 @@
 #include "virtgpu_drv.h"
 #include "virtgpu_trace.h"
 
-#define MAX_INLINE_CMD_SIZE   96
+#define MAX_INLINE_CMD_SIZE   112
 #define MAX_INLINE_RESP_SIZE  24
 #define VBUFFER_SIZE          (sizeof(struct virtio_gpu_vbuffer) \
 			       + MAX_INLINE_CMD_SIZE		 \
@@ -1294,6 +1294,7 @@ void virtio_gpu_cmd_set_scanout_blob(struct virtio_gpu_device *vgdev,
 	cmd_p->format = cpu_to_le32(format);
 	cmd_p->width  = cpu_to_le32(fb->width);
 	cmd_p->height = cpu_to_le32(fb->height);
+	cmd_p->modifier = cpu_to_le64(fb->modifier);
 
 	for (i = 0; i < 4; i++) {
 		cmd_p->strides[i] = cpu_to_le32(fb->pitches[i]);
diff --git a/include/uapi/linux/virtio_gpu.h b/include/uapi/linux/virtio_gpu.h
index 97523a95781d..c6424d769e62 100644
--- a/include/uapi/linux/virtio_gpu.h
+++ b/include/uapi/linux/virtio_gpu.h
@@ -409,6 +409,7 @@ struct virtio_gpu_set_scanout_blob {
 	__le32 width;
 	__le32 height;
 	__le32 format;
+	__le64 modifier;
 	__le32 padding;
 	__le32 strides[4];
 	__le32 offsets[4];
-- 
2.26.2