mtk_mdp: Add the service for mdp driver

Add MDP service, ROM size refine.

BUG=b:139269434
TEST=build kukui_scp pass & check MDP_SERVICE is available
BRANCH=none

Change-Id: Ic038d52eaf9aa8d32198ddd500b637bb3eca4f25
Signed-off-by: Christie Yu <christie.yu@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1584181
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Yilun Lin <yllin@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Commit-Queue: Nicolas Boichat <drinkcat@chromium.org>

1 files changed, 82 insertions, 0 deletions

diff --git a/board/kukui_scp/mdp_ipi_message.c b/board/kukui_scp/mdp_ipi_message.c
new file mode 100644
index 0000000000..a33048821f
--- /dev/null
+++ b/board/kukui_scp/mdp_ipi_message.c
@@ -0,0 +1,82 @@
+/* Copyright 2018 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 "queue_policies.h"
+#include "task.h"
+#include "util.h"
+
+#include "chip/mt_scp/ipi_chip.h"
+#include "chip/mt_scp/registers.h"
+#include "mdp_ipi_message.h"
+
+#define CPRINTF(format, args...) cprintf(CC_IPI, format, ##args)
+#define CPRINTS(format, args...) cprints(CC_IPI, format, ##args)
+
+/* Forwad declaration. */
+static struct consumer const event_mdp_consumer;
+static void event_mdp_written(struct consumer const *consumer, size_t count);
+
+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_MT8183
+void mdp_common_init(void) {}
+void mdp_ipi_task_handler(void *pvParameters) {}
+#endif
+
+static void event_mdp_written(struct consumer const *consumer, size_t count)
+{
+	task_wake(TASK_ID_MDP_SERVICE);
+}
+
+static void mdp_ipi_handler(int id, void *data, unsigned int len)
+{
+	struct mdp_msg_service cmd;
+
+	cmd.id = id;
+	memcpy(cmd.msg, data, MIN(len, sizeof(cmd.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, &cmd))
+		CPRINTS("Could not send mdp id: %d to the queue.", id);
+}
+DECLARE_IPI(IPI_MDP_INIT, mdp_ipi_handler, 0);
+DECLARE_IPI(IPI_MDP_FRAME, mdp_ipi_handler, 0);
+DECLARE_IPI(IPI_MDP_DEINIT, mdp_ipi_handler, 0);
+
+/* This function renames from mdp_service_entry. */
+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(SCP_IRQ_IPC0);
+		size = queue_remove_unit(&event_mdp_queue, &rsv_msg);
+		ipi_enable_irq(SCP_IRQ_IPC0);
+
+		if (!size)
+			task_wait_event(-1);
+		else
+			mdp_ipi_task_handler(&rsv_msg);
+	}
+}