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/* Copyright 2021 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "console.h"
#include "ipi_chip.h"
#include "mdp.h"
#include "queue_policies.h"
#include "registers.h"
#include "task.h"
#include "util.h"
#define CPRINTF(format, args...) cprintf(CC_IPI, format, ##args)
#define CPRINTS(format, args...) cprints(CC_IPI, format, ##args)
static void event_mdp_written(struct consumer const *consumer, size_t count)
{
task_wake(TASK_ID_MDP_SERVICE);
}
static struct consumer const event_mdp_consumer;
static struct queue const event_mdp_queue = QUEUE_DIRECT(4,
struct mdp_msg_service, null_producer, event_mdp_consumer);
static struct consumer const event_mdp_consumer = {
.queue = &event_mdp_queue,
.ops = &((struct consumer_ops const) {
.written = event_mdp_written,
}),
};
/* Stub functions only provided by private overlays. */
#ifndef HAVE_PRIVATE_MT_SCP
void mdp_common_init(void) {}
void mdp_ipi_task_handler(void *pvParameters) {}
#endif
static void mdp_ipi_handler(int id, void *data, unsigned int len)
{
struct mdp_msg_service rsv_msg;
if (!len) {
CPRINTS("len is zero.");
return;
}
rsv_msg.id = id;
memcpy(rsv_msg.msg, data, MIN(len, sizeof(rsv_msg.msg)));
/*
* If there is no other IPI handler touch this queue, we don't need to
* interrupt_disable() or task_disable_irq().
*/
if (!queue_add_unit(&event_mdp_queue, &rsv_msg))
CPRINTS("Could not send mdp id: %d to the queue.", id);
}
DECLARE_IPI(SCP_IPI_MDP_INIT, mdp_ipi_handler, 0);
DECLARE_IPI(SCP_IPI_MDP_FRAME, mdp_ipi_handler, 0);
DECLARE_IPI(SCP_IPI_MDP_DEINIT, mdp_ipi_handler, 0);
void mdp_service_task(void *u)
{
struct mdp_msg_service rsv_msg;
size_t size;
mdp_common_init();
while (1) {
/*
* Queue unit is added in IPI handler, which is in ISR context.
* Disable IRQ to prevent a clobbered queue.
*/
ipi_disable_irq();
size = queue_remove_unit(&event_mdp_queue, &rsv_msg);
ipi_enable_irq();
if (!size)
task_wait_event(-1);
else
mdp_ipi_task_handler(&rsv_msg);
}
}
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