korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-16 23:45:31 +08:00
Code Issues Packages Projects Releases Wiki Activity

drm/exynos: fix clipping when scaling is enabled

Browse Source 
This patch fixes calculation of src x/y offset for negative crtc x/y
values when scaling is enabled. This fixes possible IOMMU fault when
scaling is enabled.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Marek Szyprowski 2015-11-30 14:53:28 +01:00 committed by Inki Dae
parent e463b0695a
commit d16a11a006
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/exynos/exynos_drm_plane.c
View File

@ -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;