On Mon, Feb 17, 2020 at 11:18:40AM +0100, Nirmoy Das wrote:
> Calculate GPU offset within bochs driver itself without depending on
> bo->offset
>
> Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxx>
> ---
> drivers/gpu/drm/bochs/bochs_kms.c | 3 ++-
> drivers/gpu/drm/drm_gem_vram_helper.c | 2 +-
> 2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
> index 8066d7d370d5..852ec7910d84 100644
> --- a/drivers/gpu/drm/bochs/bochs_kms.c
> +++ b/drivers/gpu/drm/bochs/bochs_kms.c
> @@ -38,7 +38,8 @@ static void bochs_plane_update(struct bochs_device *bochs,
> state->crtc_x,
> state->crtc_y,
> state->fb->pitches[0],
> - state->fb->offsets[0] + gbo->bo.offset);
> + state->fb->offsets[0] +
> + (gbo->bo.mem.start << PAGE_SHIFT));
I'd suggest to use drm_gem_vram_offset() here ...
> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> index 92a11bb42365..e7ef4cd8116d 100644
> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> @@ -214,7 +214,7 @@ s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo)
> {
> if (WARN_ON_ONCE(!gbo->pin_count))
> return (s64)-ENODEV;
> - return gbo->bo.offset;
> + return gbo->bo.mem.start << PAGE_SHIFT;
... and move this to a separate patch. The vram helpers are used by
more drivers than just bochs.
cheers,
Gerd
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