mtk_vcodec: Add the service for h264 encoder

Fix the service to support h264 encoder.

BRANCH=none
BUG=b:123551776
TEST=build kukui_scp pass.

Change-Id: I2bc424ff577ee12246ffa73e5d73cfde388fe5cf
Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1535474
Commit-Queue: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Yilun Lin <yllin@chromium.org>

4 files changed, 117 insertions, 0 deletions

diff --git a/board/kukui_scp/build.mk b/board/kukui_scp/build.mk
index 7221dab826..238a657487 100644
--- a/board/kukui_scp/build.mk
+++ b/board/kukui_scp/build.mk
@@ -10,3 +10,4 @@ CHIP_VARIANT:=mt8183
 
 board-y=board.o
 board-$(HAS_TASK_VDEC_SERVICE)+=vdec.o
+board-$(HAS_TASK_VENC_SERVICE)+=venc.o
diff --git a/board/kukui_scp/ec.tasklist b/board/kukui_scp/ec.tasklist
index 09dd2e4850..6a00ce34c9 100644
--- a/board/kukui_scp/ec.tasklist
+++ b/board/kukui_scp/ec.tasklist
@@ -19,5 +19,6 @@
 	UART_TASK \
 	TASK_ALWAYS(HOSTCMD, host_command_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_ALWAYS(VDEC_SERVICE, vdec_service_task, NULL, LARGER_TASK_STACK_SIZE) \
+	TASK_ALWAYS(VENC_SERVICE, venc_service_task, NULL, LARGER_TASK_STACK_SIZE) \
 	TASK_ALWAYS(CONSOLE, console_task, NULL, LARGER_TASK_STACK_SIZE)
 
diff --git a/board/kukui_scp/venc.c b/board/kukui_scp/venc.c
new file mode 100644
index 0000000000..ef1df894a0
--- /dev/null
+++ b/board/kukui_scp/venc.c
@@ -0,0 +1,85 @@
+/* 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 "chip/mt_scp/ipi_chip.h"
+#include "chip/mt_scp/registers.h"
+#include "console.h"
+#include "hooks.h"
+#include "task.h"
+#include "util.h"
+#include "venc.h"
+#include "queue.h"
+#include "queue_policies.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_venc_consumer;
+static void event_venc_written(struct consumer const *consumer, size_t count);
+
+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,
+	}),
+};
+
+static venc_msg_handler mtk_venc_msg_handle[VENC_MAX];
+
+/* Stub functions only provided by private overlays. */
+#ifndef HAVE_PRIVATE_MT8183
+void venc_h264_msg_handler(void *data) {}
+#endif
+
+static void event_venc_written(struct consumer const *consumer, size_t count)
+{
+	task_wake(TASK_ID_VENC_SERVICE);
+}
+
+static void venc_h264_ipi_handler(int id, void *data, uint32_t len)
+{
+	struct venc_msg rsv_msg;
+
+	if (!len)
+		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(IPI_VENC_H264, venc_h264_ipi_handler, 0);
+
+/* This function renames from venc_service_entry. */
+void venc_service_task(void *u)
+{
+	struct venc_msg rsv_msg;
+	size_t size;
+
+	mtk_venc_msg_handle[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(SCP_IRQ_IPC0);
+		size = queue_remove_unit(&event_venc_queue, &rsv_msg);
+		ipi_enable_irq(SCP_IRQ_IPC0);
+
+		if (!size)
+			task_wait_event(-1);
+		else if (mtk_venc_msg_handle[rsv_msg.type])
+			venc_h264_msg_handler(rsv_msg.msg);
+		else
+			CPRINTS("venc handler %d not exists.", rsv_msg.type);
+	}
+}
diff --git a/board/kukui_scp/venc.h b/board/kukui_scp/venc.h
new file mode 100644
index 0000000000..1172efd1b1
--- /dev/null
+++ b/board/kukui_scp/venc.h
@@ -0,0 +1,30 @@
+/* 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.
+ */
+
+#ifndef __CROS_EC_SCP_VENC_H
+#define __CROS_EC_SCP_VENC_H
+
+#include "chip/mt_scp/registers.h"
+#include "compile_time_macros.h"
+#include "queue.h"
+
+enum venc_type {
+	VENC_H264,
+	VENC_MAX,
+};
+
+typedef void (*venc_msg_handler)(void *msg);
+
+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 */