Small typo:
'scalling' -> 'scaling'
With best wishes,
Tobias
Marek Szyprowski wrote:
> This patch fixes calculation of src x/y offset for negative crtc x/y
> values when scalling is enabled. This fixes possible IOMMU fault when
> scalling is enabled.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_drm_plane.c | 13 +++++++------
> 1 file changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
> index e5af4cd5e287..348bcec30489 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
> @@ -85,25 +85,26 @@ static void exynos_plane_mode_set(struct exynos_drm_plane_state *exynos_state)
> src_w = state->src_w >> 16;
> src_h = state->src_h >> 16;
>
> + /* set ratio */
> + exynos_state->h_ratio = (src_w << 16) / crtc_w;
> + exynos_state->v_ratio = (src_h << 16) / crtc_h;
> +
> + /* clip to visible area */
> actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);
> actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);
>
> if (crtc_x < 0) {
> if (actual_w)
> - src_x -= crtc_x;
> + src_x += ((-crtc_x) * exynos_state->h_ratio) >> 16;
> crtc_x = 0;
> }
>
> if (crtc_y < 0) {
> if (actual_h)
> - src_y -= crtc_y;
> + src_y += ((-crtc_y) * exynos_state->v_ratio) >> 16;
> crtc_y = 0;
> }
>
> - /* set ratio */
> - exynos_state->h_ratio = (src_w << 16) / crtc_w;
> - exynos_state->v_ratio = (src_h << 16) / crtc_h;
> -
> /* set drm framebuffer data. */
> exynos_state->src.x = src_x;
> exynos_state->src.y = src_y;
>
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