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/*
* Copyright (C) 2015 Free Electrons
* Copyright (C) 2015 NextThing Co
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drmP.h>
#include "sun4i_backend.h"
#include "sun4i_frontend.h"
#include "sun4i_layer.h"
#include "sunxi_engine.h"
static void sun4i_backend_layer_reset(struct drm_plane *plane)
{
struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
struct sun4i_layer_state *state;
if (plane->state) {
state = state_to_sun4i_layer_state(plane->state);
__drm_atomic_helper_plane_destroy_state(&state->state);
kfree(state);
plane->state = NULL;
}
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (state) {
plane->state = &state->state;
plane->state->plane = plane;
plane->state->zpos = layer->id;
}
}
static struct drm_plane_state *
sun4i_backend_layer_duplicate_state(struct drm_plane *plane)
{
struct sun4i_layer_state *orig = state_to_sun4i_layer_state(plane->state);
struct sun4i_layer_state *copy;
copy = kzalloc(sizeof(*copy), GFP_KERNEL);
if (!copy)
return NULL;
__drm_atomic_helper_plane_duplicate_state(plane, ©->state);
copy->uses_frontend = orig->uses_frontend;
return ©->state;
}
static void sun4i_backend_layer_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct sun4i_layer_state *s_state = state_to_sun4i_layer_state(state);
__drm_atomic_helper_plane_destroy_state(state);
kfree(s_state);
}
static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(old_state);
struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
struct sun4i_backend *backend = layer->backend;
sun4i_backend_layer_enable(backend, layer->id, false);
if (layer_state->uses_frontend) {
unsigned long flags;
spin_lock_irqsave(&backend->frontend_lock, flags);
backend->frontend_teardown = true;
spin_unlock_irqrestore(&backend->frontend_lock, flags);
}
}
static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(plane->state);
struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
struct sun4i_backend *backend = layer->backend;
struct sun4i_frontend *frontend = backend->frontend;
if (layer_state->uses_frontend) {
sun4i_frontend_init(frontend);
sun4i_frontend_update_coord(frontend, plane);
sun4i_frontend_update_buffer(frontend, plane);
sun4i_frontend_update_formats(frontend, plane,
DRM_FORMAT_ARGB8888);
sun4i_backend_update_layer_frontend(backend, layer->id,
DRM_FORMAT_ARGB8888);
sun4i_frontend_enable(frontend);
} else {
sun4i_backend_update_layer_formats(backend, layer->id, plane);
sun4i_backend_update_layer_buffer(backend, layer->id, plane);
}
sun4i_backend_update_layer_coord(backend, layer->id, plane);
sun4i_backend_update_layer_zpos(backend, layer->id, plane);
sun4i_backend_layer_enable(backend, layer->id, true);
}
static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
.atomic_disable = sun4i_backend_layer_atomic_disable,
.atomic_update = sun4i_backend_layer_atomic_update,
};
static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
.atomic_destroy_state = sun4i_backend_layer_destroy_state,
.atomic_duplicate_state = sun4i_backend_layer_duplicate_state,
.destroy = drm_plane_cleanup,
.disable_plane = drm_atomic_helper_disable_plane,
.reset = sun4i_backend_layer_reset,
.update_plane = drm_atomic_helper_update_plane,
};
static const uint32_t sun4i_backend_layer_formats[] = {
DRM_FORMAT_ARGB8888,
DRM_FORMAT_ARGB4444,
DRM_FORMAT_ARGB1555,
DRM_FORMAT_RGBA5551,
DRM_FORMAT_RGBA4444,
DRM_FORMAT_RGB888,
DRM_FORMAT_RGB565,
DRM_FORMAT_XRGB8888,
};
static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
struct sun4i_backend *backend,
enum drm_plane_type type)
{
struct sun4i_layer *layer;
int ret;
layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
if (!layer)
return ERR_PTR(-ENOMEM);
/* possible crtcs are set later */
ret = drm_universal_plane_init(drm, &layer->plane, 0,
&sun4i_backend_layer_funcs,
sun4i_backend_layer_formats,
ARRAY_SIZE(sun4i_backend_layer_formats),
NULL, type, NULL);
if (ret) {
dev_err(drm->dev, "Couldn't initialize layer\n");
return ERR_PTR(ret);
}
drm_plane_helper_add(&layer->plane,
&sun4i_backend_layer_helper_funcs);
layer->backend = backend;
drm_plane_create_zpos_property(&layer->plane, 0, 0,
SUN4I_BACKEND_NUM_LAYERS - 1);
return layer;
}
struct drm_plane **sun4i_layers_init(struct drm_device *drm,
struct sunxi_engine *engine)
{
struct drm_plane **planes;
struct sun4i_backend *backend = engine_to_sun4i_backend(engine);
int i;
/* We need to have a sentinel at the need, hence the overallocation */
planes = devm_kcalloc(drm->dev, SUN4I_BACKEND_NUM_LAYERS + 1,
sizeof(*planes), GFP_KERNEL);
if (!planes)
return ERR_PTR(-ENOMEM);
for (i = 0; i < SUN4I_BACKEND_NUM_LAYERS; i++) {
enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY;
struct sun4i_layer *layer;
layer = sun4i_layer_init_one(drm, backend, type);
if (IS_ERR(layer)) {
dev_err(drm->dev, "Couldn't initialize %s plane\n",
i ? "overlay" : "primary");
return ERR_CAST(layer);
};
layer->id = i;
planes[i] = &layer->plane;
};
return planes;
}
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