mtk_vcodec: Add the service for h264 decoder

Fix the service to support h264 decoder.

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

Change-Id: Iccd6389a40239a6d6791543eeb522cc3e5fc3991
Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1644186
Commit-Queue: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Yilun Lin <yllin@chromium.org>

6 files changed, 132 insertions, 1 deletions

diff --git a/board/kukui_scp/build.mk b/board/kukui_scp/build.mk
index 64262dfecc..7221dab826 100644
--- a/board/kukui_scp/build.mk
+++ b/board/kukui_scp/build.mk
@@ -9,3 +9,4 @@ CHIP:=mt_scp
 CHIP_VARIANT:=mt8183
 
 board-y=board.o
+board-$(HAS_TASK_VDEC_SERVICE)+=vdec.o
diff --git a/board/kukui_scp/ec.tasklist b/board/kukui_scp/ec.tasklist
index a0f7029ff4..09dd2e4850 100644
--- a/board/kukui_scp/ec.tasklist
+++ b/board/kukui_scp/ec.tasklist
@@ -18,5 +18,6 @@
 	TASK_ALWAYS(HOOKS, hook_task, NULL, LARGER_TASK_STACK_SIZE) \
 	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(CONSOLE, console_task, NULL, LARGER_TASK_STACK_SIZE)
 
diff --git a/board/kukui_scp/vdec.c b/board/kukui_scp/vdec.c
new file mode 100644
index 0000000000..6ab257b08e
--- /dev/null
+++ b/board/kukui_scp/vdec.c
@@ -0,0 +1,89 @@
+/* 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 "vdec.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_vdec_consumer;
+static void event_vdec_written(struct consumer const *consumer, size_t count);
+
+static struct queue const event_vdec_queue = QUEUE_DIRECT(8,
+	struct vdec_msg, null_producer, event_vdec_consumer);
+static struct consumer const event_vdec_consumer = {
+	.queue = &event_vdec_queue,
+	.ops = &((struct consumer_ops const) {
+		.written = event_vdec_written,
+	}),
+};
+
+/* Stub functions only provided by private overlays. */
+#ifndef HAVE_PRIVATE_MT8183
+void vdec_h264_service_init(void) {}
+void vdec_h264_msg_handler(void *data) {}
+#endif
+
+static vdec_msg_handler mtk_vdec_msg_handle[VDEC_MAX];
+
+static void event_vdec_written(struct consumer const *consumer, size_t count)
+{
+	task_wake(TASK_ID_VDEC_SERVICE);
+}
+
+static void vdec_h264_ipi_handler(int id, void *data, uint32_t len)
+{
+	struct vdec_msg rsv_msg;
+
+	if (!len)
+		return;
+
+	rsv_msg.type = VDEC_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_vdec_queue, &rsv_msg))
+		CPRINTS("Could not send vdec %d to the queue.", rsv_msg.type);
+}
+DECLARE_IPI(IPI_VDEC_H264, vdec_h264_ipi_handler, 0);
+
+/* This function renames from vdec_service_entry. */
+void vdec_service_task(void *u)
+{
+	struct vdec_msg rsv_msg;
+	size_t size;
+
+	vdec_h264_service_init();
+	mtk_vdec_msg_handle[VDEC_H264] = vdec_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_vdec_queue, &rsv_msg);
+		ipi_enable_irq(SCP_IRQ_IPC0);
+
+		if (!size)
+			task_wait_event(-1);
+		else if (mtk_vdec_msg_handle[rsv_msg.type])
+			vdec_h264_msg_handler(rsv_msg.msg);
+		else
+			CPRINTS("vdec handler %d not exists.", rsv_msg.type);
+	}
+}
diff --git a/board/kukui_scp/vdec.h b/board/kukui_scp/vdec.h
new file mode 100644
index 0000000000..6e4c9b40e7
--- /dev/null
+++ b/board/kukui_scp/vdec.h
@@ -0,0 +1,33 @@
+/* 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_VDEC_H
+#define __CROS_EC_SCP_VDEC_H
+
+#include "chip/mt_scp/registers.h"
+#include "compile_time_macros.h"
+#include "queue.h"
+
+enum vdec_type {
+	VDEC_H264,
+	VDEC_VP8,
+	VDEC_VP9,
+	VDEC_MAX,
+};
+
+typedef void (*vdec_msg_handler)(void *msg);
+
+struct vdec_msg {
+	enum vdec_type type;
+	unsigned char msg[48];
+};
+
+BUILD_ASSERT(member_size(struct vdec_msg, msg) <= CONFIG_IPC_SHARED_OBJ_BUF_SIZE);
+
+/* Functions provided by private overlay. */
+void vdec_h264_service_init(void);
+void vdec_h264_msg_handler(void *data);
+
+#endif /* __CROS_EC_SCP_VDEC_H */
diff --git a/chip/mt_scp/ipi.c b/chip/mt_scp/ipi.c
index 544ebb5d75..c8c0c1c74f 100644
--- a/chip/mt_scp/ipi.c
+++ b/chip/mt_scp/ipi.c
@@ -205,7 +205,7 @@ void ipi_inform_ap(void)
 	scp_run.signaled = 1;
 	strncpy(scp_run.fw_ver, system_get_version(SYSTEM_IMAGE_RW),
 		SCP_FW_VERSION_LEN);
-	scp_run.dec_capability = 0;
+	scp_run.dec_capability = VCODEC_CAPABILITY_4K_DISABLED;
 	scp_run.enc_capability = 0;
 
 	ret = ipi_send(IPI_SCP_INIT, (void *)&scp_run, sizeof(scp_run), 1);
diff --git a/chip/mt_scp/ipi_chip.h b/chip/mt_scp/ipi_chip.h
index b4178ae7e0..6b9580e112 100644
--- a/chip/mt_scp/ipi_chip.h
+++ b/chip/mt_scp/ipi_chip.h
@@ -18,6 +18,13 @@
  */
 #define SCP_FW_VERSION_LEN 32
 
+/*
+ * Video decoder supported capability:
+ * BIT(4): 0 enable 4K
+ *         1 disable 4K
+ */
+#define VCODEC_CAPABILITY_4K_DISABLED BIT(4)
+
 #ifndef IPI_SCP_INIT
 #error If CONFIG_IPI is enabled, IPI_SCP_INIT must be defined.
 #endif