Commit c21134b0 authored by Neil Armstrong's avatar Neil Armstrong Committed by Tomi Valkeinen

drm/omap: add sanity plane state check

Call drm_atomic_helper_check_plane_state() from the plane
atomic_check() callback in order to add plane state sanity
checking.

It will permit filtering out totally bad scaling factors, even
if the real check are done later in the atomic commit.

Calling drm_atomic_helper_check_plane_state() also sets
plane_state->visible which will be useful when dynamically
assigning hw overlays to planes.
Signed-off-by: default avatarBenoit Parrot <bparrot@ti.com>
Signed-off-by: default avatarNeil Armstrong <narmstrong@baylibre.com>
Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211117141928.771082-2-narmstrong@baylibre.com
parent fe4d0b63
......@@ -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;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment