Use DRM_FORMAT_HOST_XRGB8888, so we are using the correct format code on bigendian machines. Also add DRIVER_PREFER_HOST_BYTE_ORDER driver feature flag so drm_mode_addfb() asks for the correct format code.
Both DRM_FORMAT_* and VIRTIO_GPU_FORMAT_* are defined to be little endian, so using a different mapping on bigendian machines is wrong. It's there because of broken drm_mode_addfb() behavior. So with drm_mode_addfb() being fixed we can fix this too.
While wading through the code I've noticed we have a little issue in virtio: We attach a format to the bo when it is created (DRM_IOCTL_MODE_CREATE_DUMB), not when we map it as framebuffer (DRM_IOCTL_MODE_ADDFB). Easy way out: Support a single format only. Pick DRM_FORMAT_HOST_XRGB8888, it is the only one actually used in practice. Drop unused mappings in virtio_gpu_translate_format().
With this patch applied both ADDFB and ADDFB2 ioctls work correctly in the virtio-gpu.ko driver on big endian machines. Without the patch only ADDFB (which still seems to be used by the majority of userspace) works correctly.
Signed-off-by: Gerd Hoffmann kraxel@redhat.com --- drivers/gpu/drm/virtio/virtgpu_display.c | 4 +++ drivers/gpu/drm/virtio/virtgpu_drv.c | 4 ++- drivers/gpu/drm/virtio/virtgpu_fb.c | 2 +- drivers/gpu/drm/virtio/virtgpu_gem.c | 7 +++-- drivers/gpu/drm/virtio/virtgpu_plane.c | 54 ++------------------------------ 5 files changed, 15 insertions(+), 56 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c index 25503b9335..f6c4af1db4 100644 --- a/drivers/gpu/drm/virtio/virtgpu_display.c +++ b/drivers/gpu/drm/virtio/virtgpu_display.c @@ -306,6 +306,10 @@ virtio_gpu_user_framebuffer_create(struct drm_device *dev, struct virtio_gpu_framebuffer *virtio_gpu_fb; int ret;
+ if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 && + mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888) + return ERR_PTR(-ENOENT); + /* lookup object associated with res handle */ obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]); if (!obj) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c index d9287c144f..4b28f41ac1 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.c +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c @@ -114,7 +114,9 @@ static const struct file_operations virtio_gpu_driver_fops = { };
static struct drm_driver driver = { - .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_RENDER | DRIVER_ATOMIC, + .driver_features = (DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | + DRIVER_RENDER | DRIVER_ATOMIC | + DRIVER_PREFER_HOST_BYTE_ORDER), .load = virtio_gpu_driver_load, .unload = virtio_gpu_driver_unload, .open = virtio_gpu_driver_open, diff --git a/drivers/gpu/drm/virtio/virtgpu_fb.c b/drivers/gpu/drm/virtio/virtgpu_fb.c index a121b1c795..9d87ebd645 100644 --- a/drivers/gpu/drm/virtio/virtgpu_fb.c +++ b/drivers/gpu/drm/virtio/virtgpu_fb.c @@ -233,7 +233,7 @@ static int virtio_gpufb_create(struct drm_fb_helper *helper, mode_cmd.width = sizes->surface_width; mode_cmd.height = sizes->surface_height; mode_cmd.pitches[0] = mode_cmd.width * 4; - mode_cmd.pixel_format = drm_mode_legacy_fb_format(32, 24); + mode_cmd.pixel_format = DRM_FORMAT_HOST_XRGB8888;
format = virtio_gpu_translate_format(mode_cmd.pixel_format); if (format == 0) diff --git a/drivers/gpu/drm/virtio/virtgpu_gem.c b/drivers/gpu/drm/virtio/virtgpu_gem.c index 0f2768eaca..82c817f37c 100644 --- a/drivers/gpu/drm/virtio/virtgpu_gem.c +++ b/drivers/gpu/drm/virtio/virtgpu_gem.c @@ -90,7 +90,10 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, uint32_t resid; uint32_t format;
- pitch = args->width * ((args->bpp + 1) / 8); + if (args->bpp != 32) + return -EINVAL; + + pitch = args->width * 4; args->size = pitch * args->height; args->size = ALIGN(args->size, PAGE_SIZE);
@@ -99,7 +102,7 @@ int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, if (ret) goto fail;
- format = virtio_gpu_translate_format(DRM_FORMAT_XRGB8888); + format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888); virtio_gpu_resource_id_get(vgdev, &resid); virtio_gpu_cmd_create_resource(vgdev, resid, format, args->width, args->height); diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c index dc5b5b2b7a..3221d50b9a 100644 --- a/drivers/gpu/drm/virtio/virtgpu_plane.c +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c @@ -28,22 +28,11 @@ #include <drm/drm_atomic_helper.h>
static const uint32_t virtio_gpu_formats[] = { - DRM_FORMAT_XRGB8888, - DRM_FORMAT_ARGB8888, - DRM_FORMAT_BGRX8888, - DRM_FORMAT_BGRA8888, - DRM_FORMAT_RGBX8888, - DRM_FORMAT_RGBA8888, - DRM_FORMAT_XBGR8888, - DRM_FORMAT_ABGR8888, + DRM_FORMAT_HOST_XRGB8888, };
static const uint32_t virtio_gpu_cursor_formats[] = { -#ifdef __BIG_ENDIAN - DRM_FORMAT_BGRA8888, -#else - DRM_FORMAT_ARGB8888, -#endif + DRM_FORMAT_HOST_ARGB8888, };
uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc) @@ -51,32 +40,6 @@ uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc) uint32_t format;
switch (drm_fourcc) { -#ifdef __BIG_ENDIAN - case DRM_FORMAT_XRGB8888: - format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM; - break; - case DRM_FORMAT_ARGB8888: - format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM; - break; - case DRM_FORMAT_BGRX8888: - format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM; - break; - case DRM_FORMAT_BGRA8888: - format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM; - break; - case DRM_FORMAT_RGBX8888: - format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM; - break; - case DRM_FORMAT_RGBA8888: - format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM; - break; - case DRM_FORMAT_XBGR8888: - format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM; - break; - case DRM_FORMAT_ABGR8888: - format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM; - break; -#else case DRM_FORMAT_XRGB8888: format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM; break; @@ -89,19 +52,6 @@ uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc) case DRM_FORMAT_BGRA8888: format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM; break; - case DRM_FORMAT_RGBX8888: - format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM; - break; - case DRM_FORMAT_RGBA8888: - format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM; - break; - case DRM_FORMAT_XBGR8888: - format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM; - break; - case DRM_FORMAT_ABGR8888: - format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM; - break; -#endif default: /* * This should not happen, we handle everything listed