Message-ID: <808f48f4-ad4d-1afe-bf15-a8e57288f9d3@quicinc.com>
Date: Wed, 9 Apr 2025 16:19:51 +0530
From: Dikshita Agarwal <quic_dikshita@...cinc.com>
To: Neil Armstrong <neil.armstrong@...aro.org>,
        Vikash Garodia
	<quic_vgarodia@...cinc.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        "Mauro Carvalho Chehab" <mchehab@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC: <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 4/5] media: platform: qcom/iris: rename iris_vpu3 to
 iris_vpu3x



On 4/7/2025 8:54 PM, Neil Armstrong wrote:
> The vpu33 HW is very close to vpu3, and shares most of the
> operations, so rename file to vpu3x since we'll handle all vpu3
> variants in it.
> 
> Reviewed-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---
>  drivers/media/platform/qcom/iris/Makefile          |   2 +-
>  drivers/media/platform/qcom/iris/iris_vpu3.c       | 123 ---------
>  drivers/media/platform/qcom/iris/iris_vpu3x.c      | 277 +++++++++++++++++++++
>  drivers/media/platform/qcom/iris/iris_vpu_common.h |   3 +
>  4 files changed, 281 insertions(+), 124 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/iris/Makefile b/drivers/media/platform/qcom/iris/Makefile
> index 35390534534e93f4617c1036a05ca0921567ba1d..473aaf655448180ade917e642289677fc1277f99 100644
> --- a/drivers/media/platform/qcom/iris/Makefile
> +++ b/drivers/media/platform/qcom/iris/Makefile
> @@ -20,7 +20,7 @@ qcom-iris-objs += \
>               iris_vb2.o \
>               iris_vdec.o \
>               iris_vpu2.o \
> -             iris_vpu3.o \
> +             iris_vpu3x.o \
>               iris_vpu_buffer.o \
>               iris_vpu_common.o \
>  
> diff --git a/drivers/media/platform/qcom/iris/iris_vpu3.c b/drivers/media/platform/qcom/iris/iris_vpu3.c
> deleted file mode 100644
> index 13dab61427b8bd0491b69a9bc5f5144d27d17362..0000000000000000000000000000000000000000
> --- a/drivers/media/platform/qcom/iris/iris_vpu3.c
> +++ /dev/null
> @@ -1,123 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-only
> -/*
> - * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
> - */
> -
> -#include <linux/iopoll.h>
> -
> -#include "iris_instance.h"
> -#include "iris_vpu_common.h"
> -#include "iris_vpu_register_defines.h"
> -
> -#define AON_MVP_NOC_RESET			0x0001F000
> -
> -#define WRAPPER_CORE_CLOCK_CONFIG		(WRAPPER_BASE_OFFS + 0x88)
> -#define CORE_CLK_RUN				0x0
> -
> -#define CPU_CS_AHB_BRIDGE_SYNC_RESET		(CPU_CS_BASE_OFFS + 0x160)
> -#define CORE_BRIDGE_SW_RESET			BIT(0)
> -#define CORE_BRIDGE_HW_RESET_DISABLE		BIT(1)
> -
> -#define AON_WRAPPER_MVP_NOC_RESET_REQ		(AON_MVP_NOC_RESET + 0x000)
> -#define VIDEO_NOC_RESET_REQ			(BIT(0) | BIT(1))
> -
> -#define AON_WRAPPER_MVP_NOC_RESET_ACK		(AON_MVP_NOC_RESET + 0x004)
> -
> -#define VCODEC_SS_IDLE_STATUSN			(VCODEC_BASE_OFFS + 0x70)
> -
> -static bool iris_vpu3_hw_power_collapsed(struct iris_core *core)
> -{
> -	u32 value, pwr_status;
> -
> -	value = readl(core->reg_base + WRAPPER_CORE_POWER_STATUS);
> -	pwr_status = value & BIT(1);
> -
> -	return pwr_status ? false : true;
> -}
> -
> -static void iris_vpu3_power_off_hardware(struct iris_core *core)
> -{
> -	u32 reg_val = 0, value, i;
> -	int ret;
> -
> -	if (iris_vpu3_hw_power_collapsed(core))
> -		goto disable_power;
> -
> -	dev_err(core->dev, "video hw is power on\n");
> -
> -	value = readl(core->reg_base + WRAPPER_CORE_CLOCK_CONFIG);
> -	if (value)
> -		writel(CORE_CLK_RUN, core->reg_base + WRAPPER_CORE_CLOCK_CONFIG);
> -
> -	for (i = 0; i < core->iris_platform_data->num_vpp_pipe; i++) {
> -		ret = readl_poll_timeout(core->reg_base + VCODEC_SS_IDLE_STATUSN + 4 * i,
> -					 reg_val, reg_val & 0x400000, 2000, 20000);
> -		if (ret)
> -			goto disable_power;
> -	}
> -
> -	writel(VIDEO_NOC_RESET_REQ, core->reg_base + AON_WRAPPER_MVP_NOC_RESET_REQ);
> -
> -	ret = readl_poll_timeout(core->reg_base + AON_WRAPPER_MVP_NOC_RESET_ACK,
> -				 reg_val, reg_val & 0x3, 200, 2000);
> -	if (ret)
> -		goto disable_power;
> -
> -	writel(0x0, core->reg_base + AON_WRAPPER_MVP_NOC_RESET_REQ);
> -
> -	ret = readl_poll_timeout(core->reg_base + AON_WRAPPER_MVP_NOC_RESET_ACK,
> -				 reg_val, !(reg_val & 0x3), 200, 2000);
> -	if (ret)
> -		goto disable_power;
> -
> -	writel(CORE_BRIDGE_SW_RESET | CORE_BRIDGE_HW_RESET_DISABLE,
> -	       core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET);
> -	writel(CORE_BRIDGE_HW_RESET_DISABLE, core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET);
> -	writel(0x0, core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET);
> -
> -disable_power:
> -	iris_vpu_power_off_hw(core);
> -}
> -
> -static u64 iris_vpu3_calculate_frequency(struct iris_inst *inst, size_t data_size)
> -{
> -	struct platform_inst_caps *caps = inst->core->iris_platform_data->inst_caps;
> -	struct v4l2_format *inp_f = inst->fmt_src;
> -	u32 height, width, mbs_per_second, mbpf;
> -	u64 fw_cycles, fw_vpp_cycles;
> -	u64 vsp_cycles, vpp_cycles;
> -	u32 fps = DEFAULT_FPS;
> -
> -	width = max(inp_f->fmt.pix_mp.width, inst->crop.width);
> -	height = max(inp_f->fmt.pix_mp.height, inst->crop.height);
> -
> -	mbpf = NUM_MBS_PER_FRAME(height, width);
> -	mbs_per_second = mbpf * fps;
> -
> -	fw_cycles = fps * caps->mb_cycles_fw;
> -	fw_vpp_cycles = fps * caps->mb_cycles_fw_vpp;
> -
> -	vpp_cycles = mult_frac(mbs_per_second, caps->mb_cycles_vpp, (u32)inst->fw_caps[PIPE].value);
> -	/* 21 / 20 is minimum overhead factor */
> -	vpp_cycles += max(div_u64(vpp_cycles, 20), fw_vpp_cycles);
> -
> -	/* 1.059 is multi-pipe overhead */
> -	if (inst->fw_caps[PIPE].value > 1)
> -		vpp_cycles += div_u64(vpp_cycles * 59, 1000);
> -
> -	vsp_cycles = fps * data_size * 8;
> -	vsp_cycles = div_u64(vsp_cycles, 2);
> -	/* VSP FW overhead 1.05 */
> -	vsp_cycles = div_u64(vsp_cycles * 21, 20);
> -
> -	if (inst->fw_caps[STAGE].value == STAGE_1)
> -		vsp_cycles = vsp_cycles * 3;
> -
> -	return max3(vpp_cycles, vsp_cycles, fw_cycles);
> -}
> -
> -const struct vpu_ops iris_vpu3_ops = {
> -	.power_off_hw = iris_vpu3_power_off_hardware,
> -	.power_off_controller = iris_vpu_power_off_controller,
> -	.calc_freq = iris_vpu3_calculate_frequency,
> -};
> diff --git a/drivers/media/platform/qcom/iris/iris_vpu3x.c b/drivers/media/platform/qcom/iris/iris_vpu3x.c
> new file mode 100644
> index 0000000000000000000000000000000000000000..ea7be2e0a3a255f61e236740e1082e7c9207250d
> --- /dev/null
> +++ b/drivers/media/platform/qcom/iris/iris_vpu3x.c
> @@ -0,0 +1,277 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
> + */
> +
> +#include <linux/iopoll.h>
> +#include <linux/reset.h>
> +
> +#include "iris_instance.h"
> +#include "iris_vpu_common.h"
> +#include "iris_vpu_register_defines.h"
> +
> +#define WRAPPER_TZ_BASE_OFFS			0x000C0000
> +#define AON_BASE_OFFS				0x000E0000
> +#define AON_MVP_NOC_RESET			0x0001F000
> +
> +#define WRAPPER_DEBUG_BRIDGE_LPI_CONTROL	(WRAPPER_BASE_OFFS + 0x54)
> +#define WRAPPER_DEBUG_BRIDGE_LPI_STATUS		(WRAPPER_BASE_OFFS + 0x58)
> +#define WRAPPER_IRIS_CPU_NOC_LPI_CONTROL	(WRAPPER_BASE_OFFS + 0x5C)
> +#define REQ_POWER_DOWN_PREP			BIT(0)
> +#define WRAPPER_IRIS_CPU_NOC_LPI_STATUS		(WRAPPER_BASE_OFFS + 0x60)
> +#define WRAPPER_CORE_CLOCK_CONFIG		(WRAPPER_BASE_OFFS + 0x88)
> +#define CORE_CLK_RUN				0x0
> +
> +#define WRAPPER_TZ_CTL_AXI_CLOCK_CONFIG		(WRAPPER_TZ_BASE_OFFS + 0x14)
> +#define CTL_AXI_CLK_HALT			BIT(0)
> +#define CTL_CLK_HALT				BIT(1)
> +
> +#define WRAPPER_TZ_QNS4PDXFIFO_RESET		(WRAPPER_TZ_BASE_OFFS + 0x18)
> +#define RESET_HIGH				BIT(0)
> +
> +#define CPU_CS_AHB_BRIDGE_SYNC_RESET		(CPU_CS_BASE_OFFS + 0x160)
> +#define CORE_BRIDGE_SW_RESET			BIT(0)
> +#define CORE_BRIDGE_HW_RESET_DISABLE		BIT(1)
> +
> +#define CPU_CS_X2RPMH				(CPU_CS_BASE_OFFS + 0x168)
> +#define MSK_SIGNAL_FROM_TENSILICA		BIT(0)
> +#define MSK_CORE_POWER_ON			BIT(1)
> +
> +#define AON_WRAPPER_MVP_NOC_RESET_REQ		(AON_MVP_NOC_RESET + 0x000)
> +#define VIDEO_NOC_RESET_REQ			(BIT(0) | BIT(1))
> +
> +#define AON_WRAPPER_MVP_NOC_RESET_ACK		(AON_MVP_NOC_RESET + 0x004)
> +
> +#define VCODEC_SS_IDLE_STATUSN			(VCODEC_BASE_OFFS + 0x70)
> +
> +#define AON_WRAPPER_MVP_NOC_LPI_CONTROL		(AON_BASE_OFFS)
> +#define AON_WRAPPER_MVP_NOC_LPI_STATUS		(AON_BASE_OFFS + 0x4)
> +
> +#define AON_WRAPPER_MVP_NOC_CORE_SW_RESET	(AON_BASE_OFFS + 0x18)
> +#define SW_RESET				BIT(0)
> +#define AON_WRAPPER_MVP_NOC_CORE_CLK_CONTROL	(AON_BASE_OFFS + 0x20)
> +#define NOC_HALT				BIT(0)
> +#define AON_WRAPPER_SPARE			(AON_BASE_OFFS + 0x28)
> +
> +static bool iris_vpu3x_hw_power_collapsed(struct iris_core *core)
> +{
> +	u32 value, pwr_status;
> +
> +	value = readl(core->reg_base + WRAPPER_CORE_POWER_STATUS);
> +	pwr_status = value & BIT(1);
> +
> +	return pwr_status ? false : true;
> +}
> +
> +static int iris_vpu3x_power_off_hardware_begin(struct iris_core *core)
> +{
> +	u32 reg_val = 0, value, i;
> +	int ret;
> +
> +	if (iris_vpu3x_hw_power_collapsed(core))
> +		return 1;
> +
> +	dev_err(core->dev, "video hw is power on\n");
> +
> +	value = readl(core->reg_base + WRAPPER_CORE_CLOCK_CONFIG);
> +	if (value)
> +		writel(CORE_CLK_RUN, core->reg_base + WRAPPER_CORE_CLOCK_CONFIG);
> +
> +	for (i = 0; i < core->iris_platform_data->num_vpp_pipe; i++) {
> +		ret = readl_poll_timeout(core->reg_base + VCODEC_SS_IDLE_STATUSN + 4 * i,
> +					 reg_val, reg_val & 0x400000, 2000, 20000);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static void iris_vpu3x_power_off_hardware_end(struct iris_core *core)
> +{
> +	writel(CORE_BRIDGE_SW_RESET | CORE_BRIDGE_HW_RESET_DISABLE,
> +	       core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET);
> +	writel(CORE_BRIDGE_HW_RESET_DISABLE, core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET);
> +	writel(0x0, core->reg_base + CPU_CS_AHB_BRIDGE_SYNC_RESET);
> +}
> +
I'm not a big fan of splitting the API into begin/middle/end just for the
sake of de-duplication of small part of code. It ends up introducing a lot
of jumps in the code, which makes it harder to follow.
Keeping it as a single flow, even with some duplication, would be more
readable and maintainable.
> +static void iris_vpu3_power_off_hardware(struct iris_core *core)
> +{
> +	u32 reg_val = 0;
> +	int ret;
> +
> +	ret = iris_vpu3x_power_off_hardware_begin(core);
> +	if (ret)
> +		goto disable_power;
> +
> +	writel(VIDEO_NOC_RESET_REQ, core->reg_base + AON_WRAPPER_MVP_NOC_RESET_REQ);
> +
> +	ret = readl_poll_timeout(core->reg_base + AON_WRAPPER_MVP_NOC_RESET_ACK,
> +				 reg_val, reg_val & 0x3, 200, 2000);
> +	if (ret)
> +		goto disable_power;
> +
> +	writel(0x0, core->reg_base + AON_WRAPPER_MVP_NOC_RESET_REQ);
> +
> +	ret = readl_poll_timeout(core->reg_base + AON_WRAPPER_MVP_NOC_RESET_ACK,
> +				 reg_val, !(reg_val & 0x3), 200, 2000);
> +	if (ret)
> +		goto disable_power;
> +
> +	iris_vpu3x_power_off_hardware_end(core);
> +
> +disable_power:
> +	iris_vpu_power_off_hw(core);
> +}
> +
> +static void iris_vpu33_power_off_hardware(struct iris_core *core)
> +{
> +	u32 reg_val = 0;
> +	int ret;
> +
> +	ret = iris_vpu3x_power_off_hardware_begin(core);
> +	if (ret)
> +		goto disable_power;
> +
> +	ret = readl_poll_timeout(core->reg_base + AON_WRAPPER_MVP_NOC_LPI_STATUS,
> +			reg_val, reg_val & BIT(0), 200, 2000);
> +	if (ret)
> +		goto disable_power;
> +
> +	/* set MNoC to low power, set PD_NOC_QREQ (bit 0) */
> +	writel(BIT(0), core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
> +
> +	iris_vpu3x_power_off_hardware_end(core);
> +
> +disable_power:
> +	iris_vpu_power_off_hw(core);
> +}
> +
> +static int iris_vpu33_power_off_controller(struct iris_core *core)
> +{
> +	u32 xo_rst_tbl_size = core->iris_platform_data->controller_rst_tbl_size;
> +	u32 clk_rst_tbl_size = core->iris_platform_data->clk_rst_tbl_size;
> +	u32 val = 0;
> +	int ret;
> +
> +	writel(MSK_SIGNAL_FROM_TENSILICA | MSK_CORE_POWER_ON, core->reg_base + CPU_CS_X2RPMH);
> +
> +	writel(REQ_POWER_DOWN_PREP, core->reg_base + WRAPPER_IRIS_CPU_NOC_LPI_CONTROL);
> +
> +	ret = readl_poll_timeout(core->reg_base + WRAPPER_IRIS_CPU_NOC_LPI_STATUS,
> +				 val, val & BIT(0), 200, 2000);
> +	if (ret)
> +		goto disable_power;
> +
> +	writel(0x0, core->reg_base + WRAPPER_DEBUG_BRIDGE_LPI_CONTROL);
> +
> +	ret = readl_poll_timeout(core->reg_base + WRAPPER_DEBUG_BRIDGE_LPI_STATUS,
> +				 val, val == 0, 200, 2000);
> +	if (ret)
> +		goto disable_power;
> +
> +	writel(CTL_AXI_CLK_HALT | CTL_CLK_HALT,
> +	       core->reg_base + WRAPPER_TZ_CTL_AXI_CLOCK_CONFIG);
> +	writel(RESET_HIGH, core->reg_base + WRAPPER_TZ_QNS4PDXFIFO_RESET);
> +	writel(0x0, core->reg_base + WRAPPER_TZ_QNS4PDXFIFO_RESET);
> +	writel(0x0, core->reg_base + WRAPPER_TZ_CTL_AXI_CLOCK_CONFIG);
> +
> +	reset_control_bulk_reset(clk_rst_tbl_size, core->resets);
> +
> +	/* Disable MVP NoC clock */
> +	val = readl(core->reg_base + AON_WRAPPER_MVP_NOC_CORE_CLK_CONTROL);
> +	val |= NOC_HALT;
> +	writel(val, core->reg_base + AON_WRAPPER_MVP_NOC_CORE_CLK_CONTROL);
> +
> +	/* enable MVP NoC reset */
> +	val = readl(core->reg_base + AON_WRAPPER_MVP_NOC_CORE_SW_RESET);
> +	val |= SW_RESET;
> +	writel(val, core->reg_base + AON_WRAPPER_MVP_NOC_CORE_SW_RESET);
> +
> +	/* poll AON spare register bit0 to become zero with 50ms timeout */
> +	ret = readl_poll_timeout(core->reg_base + AON_WRAPPER_SPARE,
> +				 val, (val & BIT(0)) == 0, 1000, 50000);
> +	if (ret)
> +		goto disable_power;
> +
> +	/* enable bit(1) to avoid cvp noc xo reset */
> +	val = readl(core->reg_base + AON_WRAPPER_SPARE);
> +	val |= BIT(1);
> +	writel(val, core->reg_base + AON_WRAPPER_SPARE);
> +
> +	reset_control_bulk_assert(xo_rst_tbl_size, core->controller_resets);
> +
> +	/* De-assert MVP NoC reset */
> +	val = readl(core->reg_base + AON_WRAPPER_MVP_NOC_CORE_SW_RESET);
> +	val &= ~SW_RESET;
> +	writel(val, core->reg_base + AON_WRAPPER_MVP_NOC_CORE_SW_RESET);
> +
> +	usleep_range(80, 100);
> +
> +	reset_control_bulk_deassert(xo_rst_tbl_size, core->controller_resets);
> +
> +	/* reset AON spare register */
> +	writel(0, core->reg_base + AON_WRAPPER_SPARE);
> +
> +	/* Enable MVP NoC clock */
> +	val = readl(core->reg_base + AON_WRAPPER_MVP_NOC_CORE_CLK_CONTROL);
> +	val &= ~NOC_HALT;
> +	writel(val, core->reg_base + AON_WRAPPER_MVP_NOC_CORE_CLK_CONTROL);
> +
> +	iris_disable_unprepare_clock(core, IRIS_CTRL_CLK);
> +
> +disable_power:
> +	iris_disable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_CTRL_POWER_DOMAIN]);
> +	iris_disable_unprepare_clock(core, IRIS_AXI_CLK);
> +
> +	return 0;
> +}
> +
> +static u64 iris_vpu3x_calculate_frequency(struct iris_inst *inst, size_t data_size)
> +{
> +	struct platform_inst_caps *caps = inst->core->iris_platform_data->inst_caps;
> +	struct v4l2_format *inp_f = inst->fmt_src;
> +	u32 height, width, mbs_per_second, mbpf;
> +	u64 fw_cycles, fw_vpp_cycles;
> +	u64 vsp_cycles, vpp_cycles;
> +	u32 fps = DEFAULT_FPS;
> +
> +	width = max(inp_f->fmt.pix_mp.width, inst->crop.width);
> +	height = max(inp_f->fmt.pix_mp.height, inst->crop.height);
> +
> +	mbpf = NUM_MBS_PER_FRAME(height, width);
> +	mbs_per_second = mbpf * fps;
> +
> +	fw_cycles = fps * caps->mb_cycles_fw;
> +	fw_vpp_cycles = fps * caps->mb_cycles_fw_vpp;
> +
> +	vpp_cycles = mult_frac(mbs_per_second, caps->mb_cycles_vpp, (u32)inst->fw_caps[PIPE].value);
> +	/* 21 / 20 is minimum overhead factor */
> +	vpp_cycles += max(div_u64(vpp_cycles, 20), fw_vpp_cycles);
> +
> +	/* 1.059 is multi-pipe overhead */
> +	if (inst->fw_caps[PIPE].value > 1)
> +		vpp_cycles += div_u64(vpp_cycles * 59, 1000);
> +
> +	vsp_cycles = fps * data_size * 8;
> +	vsp_cycles = div_u64(vsp_cycles, 2);
> +	/* VSP FW overhead 1.05 */
> +	vsp_cycles = div_u64(vsp_cycles * 21, 20);
> +
> +	if (inst->fw_caps[STAGE].value == STAGE_1)
> +		vsp_cycles = vsp_cycles * 3;
> +
> +	return max3(vpp_cycles, vsp_cycles, fw_cycles);
> +}
> +
> +const struct vpu_ops iris_vpu3_ops = {
> +	.power_off_hw = iris_vpu3_power_off_hardware,
> +	.power_off_controller = iris_vpu_power_off_controller,
> +	.calc_freq = iris_vpu3x_calculate_frequency,
> +};
> +
> +const struct vpu_ops iris_vpu33_ops = {
> +	.power_off_hw = iris_vpu33_power_off_hardware,
> +	.power_off_controller = iris_vpu33_power_off_controller,
> +	.calc_freq = iris_vpu3x_calculate_frequency,
> +};
> diff --git a/drivers/media/platform/qcom/iris/iris_vpu_common.h b/drivers/media/platform/qcom/iris/iris_vpu_common.h
> index f8965661c602f990d5a7057565f79df4112d097e..4af3cb0d44e00be498fc7ba648c68f1ef2cb0f20 100644
> --- a/drivers/media/platform/qcom/iris/iris_vpu_common.h
> +++ b/drivers/media/platform/qcom/iris/iris_vpu_common.h
> @@ -10,6 +10,7 @@ struct iris_core;
>  
>  extern const struct vpu_ops iris_vpu2_ops;
>  extern const struct vpu_ops iris_vpu3_ops;
> +extern const struct vpu_ops iris_vpu33_ops;
>  
>  struct vpu_ops {
>  	void (*power_off_hw)(struct iris_core *core);
> @@ -23,6 +24,8 @@ void iris_vpu_clear_interrupt(struct iris_core *core);
>  int iris_vpu_watchdog(struct iris_core *core, u32 intr_status);
>  int iris_vpu_prepare_pc(struct iris_core *core);
>  int iris_vpu_power_on(struct iris_core *core);
> +void iris_vpu_power_off_controller_begin(struct iris_core *core);
> +int iris_vpu_power_off_controller_end(struct iris_core *core);
These are unused, pls remove.
>  int iris_vpu_power_off_controller(struct iris_core *core);
>  void iris_vpu_power_off_hw(struct iris_core *core);
>  void iris_vpu_power_off(struct iris_core *core);
> 

Thanks,
Dikshita

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