asurada_scp: add venc service

Adds venc (video encoder) service.

BRANCH=asurada
BUG=b:167466842
BUG=b:167469732
TEST=make BOARD=asurada_scp

Change-Id: Ifac5f7c9b711211260b14d35cdafb5774296917f
Signed-off-by: Tzung-Bi Shih <tzungbi@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2367813
Reviewed-by: Ting Shen <phoenixshen@chromium.org>

4 files changed, 114 insertions, 1 deletions

diff --git a/board/asurada_scp/build.mk b/board/asurada_scp/build.mk
index 80ffcdd5b2..60413bc639 100644
--- a/board/asurada_scp/build.mk
+++ b/board/asurada_scp/build.mk
@@ -11,3 +11,4 @@ CHIP_VARIANT:=mt8192
 
 board-y=board.o
 board-$(HAS_TASK_VDEC_SERVICE)+=vdec.o
+board-$(HAS_TASK_VENC_SERVICE)+=venc.o
diff --git a/board/asurada_scp/ec.tasklist b/board/asurada_scp/ec.tasklist
index 676d1951c3..584093683f 100644
--- a/board/asurada_scp/ec.tasklist
+++ b/board/asurada_scp/ec.tasklist
@@ -12,4 +12,5 @@
 	TASK_ALWAYS(HOSTCMD, host_command_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_ALWAYS(CONSOLE, console_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_ALWAYS(VDEC_SERVICE, vdec_service_task, NULL, TRENTA_TASK_STACK_SIZE) \
-	TASK_ALWAYS(VDEC_CORE_SERVICE, vdec_core_service_task, NULL, TRENTA_TASK_STACK_SIZE)
+	TASK_ALWAYS(VDEC_CORE_SERVICE, vdec_core_service_task, NULL, TRENTA_TASK_STACK_SIZE) \
+	TASK_ALWAYS(VENC_SERVICE, venc_service_task, NULL, TRENTA_TASK_STACK_SIZE)
diff --git a/board/asurada_scp/venc.c b/board/asurada_scp/venc.c
new file mode 100644
index 0000000000..de993209ec
--- /dev/null
+++ b/board/asurada_scp/venc.c
@@ -0,0 +1,85 @@
+/* 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 "hooks.h"
+#include "ipi_chip.h"
+#include "queue.h"
+#include "queue_policies.h"
+#include "registers.h"
+#include "task.h"
+#include "util.h"
+#include "venc.h"
+
+#define CPRINTF(format, args...) cprintf(CC_IPI, format, ##args)
+#define CPRINTS(format, args...) cprints(CC_IPI, format, ##args)
+
+static void event_venc_written(struct consumer const *consumer, size_t count)
+{
+	task_wake(TASK_ID_VENC_SERVICE);
+}
+static struct consumer const event_venc_consumer;
+static struct queue const event_venc_queue = QUEUE_DIRECT(8,
+	struct venc_msg, null_producer, event_venc_consumer);
+static struct consumer const event_venc_consumer = {
+	.queue = &event_venc_queue,
+	.ops = &((struct consumer_ops const) {
+		.written = event_venc_written,
+	}),
+};
+
+/* Stub functions only provided by private overlays. */
+#ifndef HAVE_PRIVATE_MT8192
+void venc_h264_msg_handler(void *data) {}
+#endif
+
+static void venc_h264_ipi_handler(int id, void *data, uint32_t len)
+{
+	struct venc_msg rsv_msg;
+
+	if (!len) {
+		CPRINTS("len is zero.");
+		return;
+	}
+
+	rsv_msg.type = VENC_H264;
+	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_venc_queue, &rsv_msg))
+		CPRINTS("Could not send venc %d to the queue.", rsv_msg.type);
+}
+DECLARE_IPI(SCP_IPI_VENC_H264, venc_h264_ipi_handler, 0);
+
+void venc_service_task(void *u)
+{
+	struct venc_msg rsv_msg;
+	size_t size;
+
+	typedef void (*venc_msg_handler)(void *msg);
+	static venc_msg_handler mtk_venc_msg_handle[VENC_MAX] = {
+		[VENC_H264] = venc_h264_msg_handler,
+	};
+
+	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_venc_queue, &rsv_msg);
+		ipi_enable_irq();
+
+		if (!size)
+			task_wait_event(-1);
+		else if (mtk_venc_msg_handle[rsv_msg.type])
+			mtk_venc_msg_handle[rsv_msg.type](rsv_msg.msg);
+		else
+			CPRINTS("venc handler %d not exists.", rsv_msg.type);
+	}
+}
diff --git a/board/asurada_scp/venc.h b/board/asurada_scp/venc.h
new file mode 100644
index 0000000000..47454c4507
--- /dev/null
+++ b/board/asurada_scp/venc.h
@@ -0,0 +1,26 @@
+/* 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.
+ */
+
+#ifndef __CROS_EC_SCP_VENC_H
+#define __CROS_EC_SCP_VENC_H
+
+#include "compile_time_macros.h"
+
+enum venc_type {
+	VENC_H264,
+	VENC_MAX,
+};
+
+struct venc_msg {
+	enum venc_type type;
+	unsigned char msg[288];
+};
+BUILD_ASSERT(member_size(struct venc_msg, msg) <=
+		CONFIG_IPC_SHARED_OBJ_BUF_SIZE);
+
+/* Functions provided by private overlay. */
+void venc_h264_msg_handler(void *data);
+
+#endif /* __CROS_EC_SCP_VENC_H */