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author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2015-06-16 13:54:51 +0200 |
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committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2015-07-02 14:57:58 +0200 |
commit | c423bc85097327fba71f9a831280d09b64bb62b6 (patch) | |
tree | 859cc24c100d643fc462e309b5de88eb3f83cf7e /drivers/gpu/drm/omapdrm | |
parent | drm/omap: return error if dma_alloc_writecombine fails (diff) | |
download | linux-c423bc85097327fba71f9a831280d09b64bb62b6.tar.xz linux-c423bc85097327fba71f9a831280d09b64bb62b6.zip |
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 <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'drivers/gpu/drm/omapdrm')
-rw-r--r-- | drivers/gpu/drm/omapdrm/omap_plane.c | 26 |
1 files changed, 26 insertions, 0 deletions
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 <http://www.gnu.org/licenses/>. */ +#include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_plane_helper.h> @@ -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, }; |