diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_plane.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c index 512af976b7e9..c3de4f339387 100644 --- a/drivers/gpu/drm/omapdrm/omap_plane.c +++ b/drivers/gpu/drm/omapdrm/omap_plane.c @@ -104,12 +104,15 @@ static void omap_plane_atomic_disable(struct drm_plane *plane, dispc_ovl_enable(priv->dispc, omap_plane->id, false); } +#define FRAC_16_16(mult, div) (((mult) << 16) / (div)) + static int omap_plane_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state) { struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane); struct drm_crtc_state *crtc_state; + int ret; if (!new_plane_state->fb) return 0; @@ -127,6 +130,18 @@ static int omap_plane_atomic_check(struct drm_plane *plane, if (!crtc_state->enable) return 0; + /* + * Note: these are just sanity checks to filter out totally bad scaling + * factors. The real limits must be calculated case by case, and + * unfortunately we currently do those checks only at the commit + * phase in dispc. + */ + ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state, + FRAC_16_16(1, 8), FRAC_16_16(8, 1), + true, true); + if (ret) + return ret; + if (new_plane_state->crtc_x < 0 || new_plane_state->crtc_y < 0) return -EINVAL; |