linux-kernel - Re: [PATCH] virtio-gpu: use src not crtc

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Message-ID: <CAJ+F1CKQNpJ+=i3wq2JDJi8Z+tyK1=wBEmYTE=NfNJ20VKEoDA@mail.gmail.com>
Date:	Tue, 14 Jun 2016 12:13:50 +0200
From:	Marc-André Lureau <marcandre.lureau@...il.com>
To:	Gerd Hoffmann <kraxel@...hat.com>
Cc:	dri-devel@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
	"open list:VIRTIO GPU DRIVER" 
	<virtualization@...ts.linux-foundation.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] virtio-gpu: use src not crtc

Hi

On Tue, May 31, 2016 at 2:52 PM, Gerd Hoffmann <kraxel@...hat.com> wrote:
> Pick up the correct source rectangle from framebuffer.
> Without this multihead setups are not working correctly.
>
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>

Reviewed-by: Marc-André Lureau <marcandre.lureau@...hat.com>

Additionally, I had to modify the page_flip() function to take the
plane source coordinates for virgl/3d multihead to work. Feel free to
squash.

--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -68,11 +68,16 @@ static int virtio_gpu_page_flip(struct drm_crtc *crtc,
                         0, 0, NULL);
        }
        virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
-                                  crtc->mode.hdisplay,
-                                  crtc->mode.vdisplay, 0, 0);
-       virtio_gpu_cmd_resource_flush(vgdev, handle, 0, 0,
-                                     crtc->mode.hdisplay,
-                                     crtc->mode.vdisplay);
+                       plane->state->src_w >> 16,
+                       plane->state->src_h >> 16,
+                       plane->state->src_x >> 16,
+                       plane->state->src_y >> 16);
+
+       virtio_gpu_cmd_resource_flush(vgdev, handle,
+                       plane->state->src_x >> 16,
+                       plane->state->src_y >> 16,
+                       plane->state->src_w >> 16,
+                       plane->state->src_h);

> ---
>  drivers/gpu/drm/virtio/virtgpu_plane.c | 31 ++++++++++++++++++-------------
>  1 file changed, 18 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
> index b7778a7..925ca25 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_plane.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
> @@ -85,27 +85,32 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
>                 if (bo->dumb) {
>                         virtio_gpu_cmd_transfer_to_host_2d
>                                 (vgdev, handle, 0,
> -                                cpu_to_le32(plane->state->crtc_w),
> -                                cpu_to_le32(plane->state->crtc_h),
> -                                plane->state->crtc_x, plane->state->crtc_y, NULL);
> +                                cpu_to_le32(plane->state->src_w >> 16),
> +                                cpu_to_le32(plane->state->src_h >> 16),
> +                                plane->state->src_x >> 16,
> +                                plane->state->src_y >> 16, NULL);
>                 }
>         } else {
>                 handle = 0;
>         }
>
> -       DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d\n", handle,
> +       DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n", handle,
>                   plane->state->crtc_w, plane->state->crtc_h,
> -                 plane->state->crtc_x, plane->state->crtc_y);
> +                 plane->state->crtc_x, plane->state->crtc_y,
> +                 plane->state->src_w >> 16,
> +                 plane->state->src_h >> 16,
> +                 plane->state->src_x >> 16,
> +                 plane->state->src_y >> 16);
>         virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
> -                                  plane->state->crtc_w,
> -                                  plane->state->crtc_h,
> -                                  plane->state->crtc_x,
> -                                  plane->state->crtc_y);
> +                                  plane->state->src_w >> 16,
> +                                  plane->state->src_h >> 16,
> +                                  plane->state->src_x >> 16,
> +                                  plane->state->src_y >> 16);
>         virtio_gpu_cmd_resource_flush(vgdev, handle,
> -                                     plane->state->crtc_x,
> -                                     plane->state->crtc_y,
> -                                     plane->state->crtc_w,
> -                                     plane->state->crtc_h);
> +                                     plane->state->src_x >> 16,
> +                                     plane->state->src_y >> 16,
> +                                     plane->state->src_w >> 16,
> +                                     plane->state->src_h >> 16);
>  }
>
>  static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
> --
> 1.8.3.1
>



-- 
Marc-André Lureau