diff options
Diffstat (limited to 'baseboard/mtscp-rv32i/vdec.c')
-rw-r--r-- | baseboard/mtscp-rv32i/vdec.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/baseboard/mtscp-rv32i/vdec.c b/baseboard/mtscp-rv32i/vdec.c new file mode 100644 index 0000000000..441440ba3f --- /dev/null +++ b/baseboard/mtscp-rv32i/vdec.c @@ -0,0 +1,136 @@ +/* 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 "vdec.h" + +#define CPRINTF(format, args...) cprintf(CC_IPI, format, ##args) +#define CPRINTS(format, args...) cprints(CC_IPI, format, ##args) + +static void event_vdec_written(struct consumer const *consumer, size_t count) +{ + task_wake(TASK_ID_VDEC_SERVICE); +} +static struct consumer const event_vdec_consumer; +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, + }), +}; + +static void event_vdec_core_written(struct consumer const *consumer, + size_t count) +{ + task_wake(TASK_ID_VDEC_CORE_SERVICE); +} +static struct consumer const event_vdec_core_consumer; +static struct queue const event_vdec_core_queue = QUEUE_DIRECT(8, + struct vdec_msg, null_producer, event_vdec_core_consumer); +static struct consumer const event_vdec_core_consumer = { + .queue = &event_vdec_core_queue, + .ops = &((struct consumer_ops const) { + .written = event_vdec_core_written, + }), +}; + +/* Stub functions only provided by private overlays. */ +#ifndef HAVE_PRIVATE_MT8192 +void vdec_msg_handler(void *data) {} +void vdec_core_msg_handler(void *data) {} +#endif + +static void vdec_h264_ipi_handler(int id, void *data, uint32_t len) +{ + struct vdec_msg rsv_msg; + + if (!len) { + CPRINTS("len is zero."); + return; + } + + rsv_msg.type = VDEC_LAT; + 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(SCP_IPI_VDEC_LAT, vdec_h264_ipi_handler, 0); + +static void vdec_h264_ipi_core_handler(int id, void *data, uint32_t len) +{ + struct vdec_msg rsv_msg; + + if (!len) { + CPRINTS("len is zero."); + return; + } + + rsv_msg.type = VDEC_CORE; + 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_core_queue, &rsv_msg)) + CPRINTS("Could not send vdec %d to core queue.", rsv_msg.type); +} +DECLARE_IPI(SCP_IPI_VDEC_CORE, vdec_h264_ipi_core_handler, 0); + +void vdec_service_task(void *u) +{ + struct vdec_msg rsv_msg; + size_t size; + + 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_vdec_queue, &rsv_msg); + ipi_enable_irq(); + + if (!size) + task_wait_event(-1); + else + vdec_msg_handler(rsv_msg.msg); + } +} + +void vdec_core_service_task(void *u) +{ + struct vdec_msg rsv_msg; + size_t size; + + 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_vdec_core_queue, &rsv_msg); + ipi_enable_irq(); + + if (!size) + task_wait_event(-1); + else + vdec_core_msg_handler(rsv_msg.msg); + } +} |