[Qemu-devel] [PATCH v3 0/4] add drm modifier support for dmabufs.

[Qemu-devel] [PATCH v3 0/4] add drm modifier support for dmabufs.

[Gerd Hoffmann]

v2: fix build failure with older mesa versions which don't have
    EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT

Gerd Hoffmann (4):
  console: add dmabuf modifier field.
  vfio/display: set dmabuf modifier field
  egl-helpers: add modifier support to egl_get_fd_for_texture().
  egl-helpers: add modifier support to egl_dmabuf_import_texture()

 include/ui/console.h     |  1 +
 include/ui/egl-helpers.h |  3 ++-
 hw/vfio/display.c        |  1 +
 ui/egl-helpers.c         | 39 ++++++++++++++++++++++++++++-----------
 ui/spice-display.c       |  7 ++++---
 5 files changed, 36 insertions(+), 15 deletions(-)

-- 
2.18.1

[Qemu-devel] [PATCH v3 1/4] console: add dmabuf modifier field.

[Gerd Hoffmann]

dmabufs can have a format modifier (DRM_FORMAT_MOD_*) which is used for
tiled layouts for example.  Add a field to QemuDmaBuf so we can carry
around that information.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 include/ui/console.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/ui/console.h b/include/ui/console.h
index fef900db76a5..f9816968487c 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -175,6 +175,7 @@ typedef struct QemuDmaBuf {
     uint32_t  height;
     uint32_t  stride;
     uint32_t  fourcc;
+    uint64_t  modifier;
     uint32_t  texture;
     bool      y0_top;
 } QemuDmaBuf;
-- 
2.18.1

[Qemu-devel] [PATCH v3 2/4] vfio/display: set dmabuf modifier field

[Gerd Hoffmann]

Fill the new QemuDmaBuf->modifier field properly from plane info.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
---
 hw/vfio/display.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/vfio/display.c b/hw/vfio/display.c
index 2c2d3e5b71d6..a5a608c5b226 100644
--- a/hw/vfio/display.c
+++ b/hw/vfio/display.c
@@ -248,6 +248,7 @@ static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev,
     dmabuf->buf.height = plane.height;
     dmabuf->buf.stride = plane.stride;
     dmabuf->buf.fourcc = plane.drm_format;
+    dmabuf->buf.modifier = plane.drm_format_mod;
     dmabuf->buf.fd     = fd;
     if (plane_type == DRM_PLANE_TYPE_CURSOR) {
         vfio_display_update_cursor(dmabuf, &plane);
-- 
2.18.1

[Qemu-devel] [PATCH v3 3/4] egl-helpers: add modifier support to egl_get_fd_for_texture().

[Gerd Hoffmann]

Add modifier parameter to egl_get_fd_for_texture(), to return the used
modifier on dmabuf exports.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/egl-helpers.h | 3 ++-
 ui/egl-helpers.c         | 5 +++--
 ui/spice-display.c       | 7 ++++---
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/include/ui/egl-helpers.h b/include/ui/egl-helpers.h
index b976cb872821..d71412779913 100644
--- a/include/ui/egl-helpers.h
+++ b/include/ui/egl-helpers.h
@@ -36,7 +36,8 @@ extern struct gbm_device *qemu_egl_rn_gbm_dev;
 extern EGLContext qemu_egl_rn_ctx;
 
 int egl_rendernode_init(const char *rendernode, DisplayGLMode mode);
-int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc);
+int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
+                           EGLuint64KHR *modifier);
 
 void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf);
 void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf);
diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index e90eef8c9c3a..0c9716067cfb 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -200,7 +200,8 @@ err:
     return -1;
 }
 
-int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc)
+int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
+                           EGLuint64KHR *modifier)
 {
     EGLImageKHR image;
     EGLint num_planes, fd;
@@ -214,7 +215,7 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc)
     }
 
     eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
-                                  &num_planes, NULL);
+                                  &num_planes, modifier);
     if (num_planes != 1) {
         eglDestroyImageKHR(qemu_egl_display, image);
         return -1;
diff --git a/ui/spice-display.c b/ui/spice-display.c
index a5e26479a866..104df2302575 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -888,7 +888,8 @@ static void spice_gl_switch(DisplayChangeListener *dcl,
     if (ssd->ds) {
         surface_gl_create_texture(ssd->gls, ssd->ds);
         fd = egl_get_fd_for_texture(ssd->ds->texture,
-                                    &stride, &fourcc);
+                                    &stride, &fourcc,
+                                    NULL);
         if (fd < 0) {
             surface_gl_destroy_texture(ssd->gls, ssd->ds);
             return;
@@ -945,7 +946,7 @@ static void qemu_spice_gl_scanout_texture(DisplayChangeListener *dcl,
     int fd = -1;
 
     assert(tex_id);
-    fd = egl_get_fd_for_texture(tex_id, &stride, &fourcc);
+    fd = egl_get_fd_for_texture(tex_id, &stride, &fourcc, NULL);
     if (fd < 0) {
         fprintf(stderr, "%s: failed to get fd for texture\n", __func__);
         return;
@@ -1063,7 +1064,7 @@ static void qemu_spice_gl_update(DisplayChangeListener *dcl,
                 egl_fb_setup_new_tex(&ssd->blit_fb,
                                      dmabuf->width, dmabuf->height);
                 fd = egl_get_fd_for_texture(ssd->blit_fb.texture,
-                                            &stride, &fourcc);
+                                            &stride, &fourcc, NULL);
                 spice_qxl_gl_scanout(&ssd->qxl, fd,
                                      dmabuf->width, dmabuf->height,
                                      stride, fourcc, false);
-- 
2.18.1

[Qemu-devel] [PATCH v3 4/4] egl-helpers: add modifier support to egl_dmabuf_import_texture()

[Gerd Hoffmann]

Check and use QemuDmaBuf->modifier in egl_dmabuf_import_texture()
for dmabuf imports.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/egl-helpers.c | 34 +++++++++++++++++++++++++---------
 1 file changed, 25 insertions(+), 9 deletions(-)

diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index 0c9716067cfb..edc53f6d3464 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -229,20 +229,36 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
 void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
 {
     EGLImageKHR image = EGL_NO_IMAGE_KHR;
-    EGLint attrs[] = {
-        EGL_DMA_BUF_PLANE0_FD_EXT,      dmabuf->fd,
-        EGL_DMA_BUF_PLANE0_PITCH_EXT,   dmabuf->stride,
-        EGL_DMA_BUF_PLANE0_OFFSET_EXT,  0,
-        EGL_WIDTH,                      dmabuf->width,
-        EGL_HEIGHT,                     dmabuf->height,
-        EGL_LINUX_DRM_FOURCC_EXT,       dmabuf->fourcc,
-        EGL_NONE, /* end of list */
-    };
+    EGLint attrs[64];
+    int i = 0;
 
     if (dmabuf->texture != 0) {
         return;
     }
 
+    attrs[i++] = EGL_WIDTH;
+    attrs[i++] = dmabuf->width;
+    attrs[i++] = EGL_HEIGHT;
+    attrs[i++] = dmabuf->height;
+    attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT;
+    attrs[i++] = dmabuf->fourcc;
+
+    attrs[i++] = EGL_DMA_BUF_PLANE0_FD_EXT;
+    attrs[i++] = dmabuf->fd;
+    attrs[i++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
+    attrs[i++] = dmabuf->stride;
+    attrs[i++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
+    attrs[i++] = 0;
+#ifdef EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT
+    if (dmabuf->modifier) {
+        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
+        attrs[i++] = (dmabuf->modifier >>  0) & 0xffffffff;
+        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
+        attrs[i++] = (dmabuf->modifier >> 32) & 0xffffffff;
+    }
+#endif
+    attrs[i++] = EGL_NONE;
+
     image = eglCreateImageKHR(qemu_egl_display,
                               EGL_NO_CONTEXT,
                               EGL_LINUX_DMA_BUF_EXT,
-- 
2.18.1

Re: [Qemu-devel] [PATCH v3 4/4] egl-helpers: add modifier support to egl_dmabuf_import_texture()

[Marc-André Lureau]

Hi

On Wed, May 29, 2019 at 9:24 AM Gerd Hoffmann <kraxel@redhat.com> wrote:
>
> Check and use QemuDmaBuf->modifier in egl_dmabuf_import_texture()
> for dmabuf imports.
>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>  ui/egl-helpers.c | 34 +++++++++++++++++++++++++---------
>  1 file changed, 25 insertions(+), 9 deletions(-)
>
> diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
> index 0c9716067cfb..edc53f6d3464 100644
> --- a/ui/egl-helpers.c
> +++ b/ui/egl-helpers.c
> @@ -229,20 +229,36 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
>  void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
>  {
>      EGLImageKHR image = EGL_NO_IMAGE_KHR;
> -    EGLint attrs[] = {
> -        EGL_DMA_BUF_PLANE0_FD_EXT,      dmabuf->fd,
> -        EGL_DMA_BUF_PLANE0_PITCH_EXT,   dmabuf->stride,
> -        EGL_DMA_BUF_PLANE0_OFFSET_EXT,  0,
> -        EGL_WIDTH,                      dmabuf->width,
> -        EGL_HEIGHT,                     dmabuf->height,
> -        EGL_LINUX_DRM_FOURCC_EXT,       dmabuf->fourcc,
> -        EGL_NONE, /* end of list */
> -    };
> +    EGLint attrs[64];
> +    int i = 0;
>
>      if (dmabuf->texture != 0) {
>          return;
>      }
>
> +    attrs[i++] = EGL_WIDTH;
> +    attrs[i++] = dmabuf->width;
> +    attrs[i++] = EGL_HEIGHT;
> +    attrs[i++] = dmabuf->height;
> +    attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT;
> +    attrs[i++] = dmabuf->fourcc;
> +
> +    attrs[i++] = EGL_DMA_BUF_PLANE0_FD_EXT;
> +    attrs[i++] = dmabuf->fd;
> +    attrs[i++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
> +    attrs[i++] = dmabuf->stride;
> +    attrs[i++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
> +    attrs[i++] = 0;
> +#ifdef EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT
> +    if (dmabuf->modifier) {
> +        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
> +        attrs[i++] = (dmabuf->modifier >>  0) & 0xffffffff;
> +        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
> +        attrs[i++] = (dmabuf->modifier >> 32) & 0xffffffff;
> +    }
> +#endif

Shouldn't there be at least a warning for #else?

> +    attrs[i++] = EGL_NONE;
> +
>      image = eglCreateImageKHR(qemu_egl_display,
>                                EGL_NO_CONTEXT,
>                                EGL_LINUX_DMA_BUF_EXT,
> --
> 2.18.1
>
>


-- 
Marc-André Lureau

Re: [Qemu-devel] [PATCH v3 4/4] egl-helpers: add modifier support to egl_dmabuf_import_texture()

[Gerd Hoffmann]

  Hi,

> > +#ifdef EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT
> > +    if (dmabuf->modifier) {
> > +        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
> > +        attrs[i++] = (dmabuf->modifier >>  0) & 0xffffffff;
> > +        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
> > +        attrs[i++] = (dmabuf->modifier >> 32) & 0xffffffff;
> > +    }
> > +#endif
> 
> Shouldn't there be at least a warning for #else?

I don't think so.  In most cases (single gpu device in the host) things
will work fine even without specifying the modifier.

cheers,
  Gerd