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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
* Author: Benoit Parrot <bparrot@ti.com>
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
#include "omap_dmm_tiler.h"
#include "omap_drv.h"
/*
* overlay funcs
*/
static const char * const overlay_id_to_name[] = {
[OMAP_DSS_GFX] = "gfx",
[OMAP_DSS_VIDEO1] = "vid1",
[OMAP_DSS_VIDEO2] = "vid2",
[OMAP_DSS_VIDEO3] = "vid3",
};
/*
* Find a free overlay with the required caps and supported fourcc
*/
static struct omap_hw_overlay *
omap_plane_find_free_overlay(struct drm_device *dev, struct drm_plane *hwoverlay_to_plane[],
u32 caps, u32 fourcc)
{
struct omap_drm_private *priv = dev->dev_private;
int i;
DBG("caps: %x fourcc: %x", caps, fourcc);
for (i = 0; i < priv->num_ovls; i++) {
struct omap_hw_overlay *cur = priv->overlays[i];
DBG("%d: id: %d cur->caps: %x",
cur->idx, cur->id, cur->caps);
/* skip if already in-use */
if (hwoverlay_to_plane[cur->idx])
continue;
/* skip if doesn't support some required caps: */
if (caps & ~cur->caps)
continue;
/* check supported format */
if (!dispc_ovl_color_mode_supported(priv->dispc,
cur->id, fourcc))
continue;
return cur;
}
DBG("no match");
return NULL;
}
/*
* Assign a new overlay to a plane with the required caps and supported fourcc
* If a plane need a new overlay, the previous one should have been released
* with omap_overlay_release()
* This should be called from the plane atomic_check() in order to prepare the
* next global overlay_map to be enabled when atomic transaction is valid.
*/
int omap_overlay_assign(struct drm_atomic_state *s, struct drm_plane *plane,
u32 caps, u32 fourcc, struct omap_hw_overlay **overlay,
struct omap_hw_overlay **r_overlay)
{
/* Get the global state of the current atomic transaction */
struct omap_global_state *state = omap_get_global_state(s);
struct drm_plane **overlay_map = state->hwoverlay_to_plane;
struct omap_hw_overlay *ovl, *r_ovl;
ovl = omap_plane_find_free_overlay(s->dev, overlay_map, caps, fourcc);
if (!ovl)
return -ENOMEM;
overlay_map[ovl->idx] = plane;
*overlay = ovl;
if (r_overlay) {
r_ovl = omap_plane_find_free_overlay(s->dev, overlay_map,
caps, fourcc);
if (!r_ovl) {
overlay_map[r_ovl->idx] = NULL;
*overlay = NULL;
return -ENOMEM;
}
overlay_map[r_ovl->idx] = plane;
*r_overlay = r_ovl;
}
DBG("%s: assign to plane %s caps %x", ovl->name, plane->name, caps);
if (r_overlay) {
DBG("%s: assign to right of plane %s caps %x",
r_ovl->name, plane->name, caps);
}
return 0;
}
/*
* Release an overlay from a plane if the plane gets not visible or the plane
* need a new overlay if overlay caps changes.
* This should be called from the plane atomic_check() in order to prepare the
* next global overlay_map to be enabled when atomic transaction is valid.
*/
void omap_overlay_release(struct drm_atomic_state *s, struct omap_hw_overlay *overlay)
{
/* Get the global state of the current atomic transaction */
struct omap_global_state *state = omap_get_global_state(s);
struct drm_plane **overlay_map = state->hwoverlay_to_plane;
if (!overlay)
return;
if (WARN_ON(!overlay_map[overlay->idx]))
return;
DBG("%s: release from plane %s", overlay->name, overlay_map[overlay->idx]->name);
overlay_map[overlay->idx] = NULL;
}
/*
* Update an overlay state that was attached to a plane before the current atomic state.
* This should be called from the plane atomic_update() or atomic_disable(),
* where an overlay association to a plane could have changed between the old and current
* atomic state.
*/
void omap_overlay_update_state(struct omap_drm_private *priv,
struct omap_hw_overlay *overlay)
{
struct omap_global_state *state = omap_get_existing_global_state(priv);
struct drm_plane **overlay_map = state->hwoverlay_to_plane;
/* Check if this overlay is not used anymore, then disable it */
if (!overlay_map[overlay->idx]) {
DBG("%s: disabled", overlay->name);
/* disable the overlay */
dispc_ovl_enable(priv->dispc, overlay->id, false);
}
}
static void omap_overlay_destroy(struct omap_hw_overlay *overlay)
{
kfree(overlay);
}
static struct omap_hw_overlay *omap_overlay_init(enum omap_plane_id overlay_id,
enum omap_overlay_caps caps)
{
struct omap_hw_overlay *overlay;
overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
if (!overlay)
return ERR_PTR(-ENOMEM);
overlay->name = overlay_id_to_name[overlay_id];
overlay->id = overlay_id;
overlay->caps = caps;
return overlay;
}
int omap_hwoverlays_init(struct omap_drm_private *priv)
{
static const enum omap_plane_id hw_plane_ids[] = {
OMAP_DSS_GFX, OMAP_DSS_VIDEO1,
OMAP_DSS_VIDEO2, OMAP_DSS_VIDEO3,
};
u32 num_overlays = dispc_get_num_ovls(priv->dispc);
enum omap_overlay_caps caps;
int i, ret;
for (i = 0; i < num_overlays; i++) {
struct omap_hw_overlay *overlay;
caps = dispc_ovl_get_caps(priv->dispc, hw_plane_ids[i]);
overlay = omap_overlay_init(hw_plane_ids[i], caps);
if (IS_ERR(overlay)) {
ret = PTR_ERR(overlay);
dev_err(priv->dev, "failed to construct overlay for %s (%d)\n",
overlay_id_to_name[i], ret);
omap_hwoverlays_destroy(priv);
return ret;
}
overlay->idx = priv->num_ovls;
priv->overlays[priv->num_ovls++] = overlay;
}
return 0;
}
void omap_hwoverlays_destroy(struct omap_drm_private *priv)
{
int i;
for (i = 0; i < priv->num_ovls; i++) {
omap_overlay_destroy(priv->overlays[i]);
priv->overlays[i] = NULL;
}
priv->num_ovls = 0;
}
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