From c423bc85097327fba71f9a831280d09b64bb62b6 Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen Date: Tue, 16 Jun 2015 14:54:51 +0300 Subject: [PATCH] drm/omap: check that plane is inside crtc DRM allows planes to be partially off-screen, but DSS hardware does not. This patch adds the necessary check to reject plane configs if the plane is not fully inside the crtc. Signed-off-by: Tomi Valkeinen Acked-by: Laurent Pinchart --- drivers/gpu/drm/omapdrm/omap_plane.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c index cfa8276c4deb..098904696a5c 100644 --- a/drivers/gpu/drm/omapdrm/omap_plane.c +++ b/drivers/gpu/drm/omapdrm/omap_plane.c @@ -17,6 +17,7 @@ * this program. If not, see . */ +#include #include #include @@ -153,9 +154,34 @@ static void omap_plane_atomic_disable(struct drm_plane *plane, dispc_ovl_enable(omap_plane->id, false); } +static int omap_plane_atomic_check(struct drm_plane *plane, + struct drm_plane_state *state) +{ + struct drm_crtc_state *crtc_state; + + if (!state->crtc) + return 0; + + crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + + if (state->crtc_x < 0 || state->crtc_y < 0) + return -EINVAL; + + if (state->crtc_x + state->crtc_w > crtc_state->adjusted_mode.hdisplay) + return -EINVAL; + + if (state->crtc_y + state->crtc_h > crtc_state->adjusted_mode.vdisplay) + return -EINVAL; + + return 0; +} + static const struct drm_plane_helper_funcs omap_plane_helper_funcs = { .prepare_fb = omap_plane_prepare_fb, .cleanup_fb = omap_plane_cleanup_fb, + .atomic_check = omap_plane_atomic_check, .atomic_update = omap_plane_atomic_update, .atomic_disable = omap_plane_atomic_disable, }; -- 2.34.1