Re: [PATCH 3/4] media: platform: qcom/iris: add support for vpu33

[Neil Armstrong <neil.armstrong@linaro.org>]

On 28/02/2025 12:39, Dikshita Agarwal wrote:
> 
> 
> On 2/25/2025 2:35 PM, Neil Armstrong wrote:
>> The IRIS acceleration found in the SM8650 platforms uses the vpu33
>> hardware version, and requires a slighly different reset and power off
>> sequences in order to properly get out of runtime suspend.
>>
>> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
>> ---
>>   drivers/media/platform/qcom/iris/Makefile          |   1 +
>>   drivers/media/platform/qcom/iris/iris_vpu33.c      | 315 +++++++++++++++++++++
>>   drivers/media/platform/qcom/iris/iris_vpu_common.h |   1 +
>>   3 files changed, 317 insertions(+)
>>
>> diff --git a/drivers/media/platform/qcom/iris/Makefile b/drivers/media/platform/qcom/iris/Makefile
>> index 35390534534e93f4617c1036a05ca0921567ba1d..6b64c9988505afd9707c704449d60bb53209229f 100644
>> --- a/drivers/media/platform/qcom/iris/Makefile
>> +++ b/drivers/media/platform/qcom/iris/Makefile
>> @@ -21,6 +21,7 @@ qcom-iris-objs += \
>>                iris_vdec.o \
>>                iris_vpu2.o \
>>                iris_vpu3.o \
>> +             iris_vpu33.o \
>>                iris_vpu_buffer.o \
>>                iris_vpu_common.o \
>>   
>> diff --git a/drivers/media/platform/qcom/iris/iris_vpu33.c b/drivers/media/platform/qcom/iris/iris_vpu33.c
>> new file mode 100644
>> index 0000000000000000000000000000000000000000..128a050f206f99ec0d43b97ff995fa50d5684150
>> --- /dev/null
>> +++ b/drivers/media/platform/qcom/iris/iris_vpu33.c
>> @@ -0,0 +1,315 @@
>> +// 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)
>> +
>> +#define VCODEC_DMA_SPARE_3 0x87B8
>> +
>> +static int reset_control_bulk_assert_id(int num_rstcs,
>> +					struct reset_control_bulk_data *rstcs,
>> +					char *id)
>> +{
>> +	int i;
>> +
>> +	for (i = 0; i < num_rstcs; ++i) {
>> +		if (!strcmp(rstcs[i].id, id))
>> +			return reset_control_assert(rstcs[i].rstc);
>> +	}
>> +
>> +	return -ENODEV;
>> +}
>> +
>> +static int reset_control_bulk_deassert_id(int num_rstcs,
>> +					  struct reset_control_bulk_data *rstcs,
>> +					  char *id)
>> +{
>> +	int i;
>> +
>> +	for (i = 0; i < num_rstcs; ++i) {
>> +		if (!strcmp(rstcs[i].id, id))
>> +			return reset_control_deassert(rstcs[i].rstc);
>> +	}
>> +
>> +	return -ENODEV;
>> +}
>> +
>> +static bool iris_vpu33_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_vpu33_power_off_hardware(struct iris_core *core)
>> +{
>> +	u32 reg_val = 0, value, i;
>> +	int ret;
>> +	int count = 0;
>> +
>> +	if (iris_vpu33_hw_power_collapsed(core))
>> +		goto disable_power;
>> +
>> +	value = readl(core->reg_base + WRAPPER_CORE_CLOCK_CONFIG);
>> +	if (value)
>> +		writel(CORE_CLK_RUN, core->reg_base + WRAPPER_CORE_CLOCK_CONFIG);
>> +
>> +	value = readl(core->reg_base + VCODEC_DMA_SPARE_3);
>> +	value |= BIT(0);
>> +	writel(value, core->reg_base + VCODEC_DMA_SPARE_3)> +
>> +	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;
>> +	}
>> +
>> +	/* set MNoC to low power, set PD_NOC_QREQ (bit 0) */
>> +	value = readl(core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>> +	value |= BIT(0);
>> +	writel(value, core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>> +
>> +	value = readl(core->reg_base + AON_WRAPPER_MVP_NOC_LPI_STATUS);
>> +
>> +	while ((!(value & BIT(0))) && (value & BIT(1) || value & BIT(2))) {
>> +		value = readl(core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>> +		value &= ~BIT(0);
>> +		writel(value, core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>> +
>> +		usleep_range(10, 20);
>> +
>> +		value = readl(core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>> +		value |= BIT(0);
>> +		writel(value, core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>> +
>> +		usleep_range(10, 20);
>> +
>> +		value = readl(core->reg_base + AON_WRAPPER_MVP_NOC_LPI_STATUS);
>> +
>> +		++count;
>> +		if (count >= 1000)
>> +			break;
>> +	}
>> +
>> +	if (count < 1000) {
>> +		value = readl(core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>> +		value &= ~BIT(0);
>> +		writel(value, core->reg_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
>> +	}
>> +
>> +	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 int iris_vpu33_power_off_controller(struct iris_core *core)
>> +{
>> +	u32 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);
>> +
> The code till here in this API is common with
> iris_vpu_power_off_controller(), please check the possibility of reusing it.

Ack

>> +	reset_control_bulk_assert_id(rst_tbl_size, core->resets, "bus");
>> +	reset_control_bulk_assert_id(rst_tbl_size, core->resets, "core");
>> +	usleep_range(1000, 1100);
>> +	reset_control_bulk_deassert_id(rst_tbl_size, core->resets, "bus");
>> +	reset_control_bulk_deassert_id(rst_tbl_size, core->resets, "core");
>> +
>> +	/* 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_id(rst_tbl_size, core->resets, "xo");
>> +
>> +	/* 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_id(rst_tbl_size, core->resets, "xo");
>> +
>> +	/* 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_vpu33_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);
>> +}
>> +
> This is exactly same as vpu3 calculation, pls reuse.

Ack

>> +static int iris_vpu33_reset_controller(struct iris_core *core)
>> +{
>> +	u32 rst_tbl_size = core->iris_platform_data->clk_rst_tbl_size;
>> +
>> +	reset_control_bulk_assert_id(rst_tbl_size, core->resets, "bus");
>> +	reset_control_bulk_assert_id(rst_tbl_size, core->resets, "core");
>> +
>> +	usleep_range(1000, 1100);
>> +
>> +	reset_control_bulk_deassert_id(rst_tbl_size, core->resets, "bus");
>> +	reset_control_bulk_deassert_id(rst_tbl_size, core->resets, "core");
>> +
>> +	return 0;
>> +}
>> +
> should be replacable with reset_control_bulk_reset. pls revisit.

It only resets bus & core, and keeps xo alone, so reset_control_bulk_reset() cannot be used.

>> +const struct vpu_ops iris_vpu33_ops = {
>> +	.reset_controller = iris_vpu33_reset_controller,
>> +	.power_off_hw = iris_vpu33_power_off_hardware,
>> +	.power_off_controller = iris_vpu33_power_off_controller,
>> +	.calc_freq = iris_vpu33_calculate_frequency,
>> +};
> you can rename vpu3.c to vpu3x.c and move these ops to same file, this way
> common API can be reused and no need of redinfing the macros as well.

I'll try that,

Thanks,
Neil

> 
> Thanks,
> Dikshita
>> diff --git a/drivers/media/platform/qcom/iris/iris_vpu_common.h b/drivers/media/platform/qcom/iris/iris_vpu_common.h
>> index c948d8b5aee87ccf1fd53c5518a27294232d8fb8..c4d02a3b884881eb033dc0342f948848adae2819 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 {
>>   	int (*reset_controller)(struct iris_core *core);
>>