drivers/media/platform/verisilicon/hantro_g1.c

Source file repositories/reference/linux-study-clean/drivers/media/platform/verisilicon/hantro_g1.c

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/verisilicon/hantro_g1.c
Extension
.c
Size
1053 bytes
Lines
40
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Hantro VPU codec driver
 *
 * Copyright (C) 2018 Rockchip Electronics Co., Ltd.
 *	Jeffy Chen <jeffy.chen@rock-chips.com>
 * Copyright (C) 2019 Pengutronix, Philipp Zabel <kernel@pengutronix.de>
 * Copyright (C) 2021 Collabora Ltd, Emil Velikov <emil.velikov@collabora.com>
 */

#include "hantro.h"
#include "hantro_g1_regs.h"

irqreturn_t hantro_g1_irq(int irq, void *dev_id)
{
	struct hantro_dev *vpu = dev_id;
	enum vb2_buffer_state state;
	u32 status;

	status = vdpu_read(vpu, G1_REG_INTERRUPT);
	state = (status & G1_REG_INTERRUPT_DEC_RDY_INT) ?
		 VB2_BUF_STATE_DONE : VB2_BUF_STATE_ERROR;

	vdpu_write(vpu, 0, G1_REG_INTERRUPT);
	vdpu_write(vpu, G1_REG_CONFIG_DEC_CLK_GATE_E, G1_REG_CONFIG);

	hantro_irq_done(vpu, state);

	return IRQ_HANDLED;
}

void hantro_g1_reset(struct hantro_ctx *ctx)
{
	struct hantro_dev *vpu = ctx->dev;

	vdpu_write(vpu, G1_REG_INTERRUPT_DEC_IRQ_DIS, G1_REG_INTERRUPT);
	vdpu_write(vpu, G1_REG_CONFIG_DEC_CLK_GATE_E, G1_REG_CONFIG);
	vdpu_write(vpu, 1, G1_REG_SOFT_RESET);
}

Annotation

Implementation Notes