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From: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Cc: Vikash Garodia <vikash.garodia@oss.qualcomm.com>,
	Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>,
	Abhinav Kumar <abhinav.kumar@linux.dev>,
	Bryan O'Donoghue <bod@kernel.org>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Hans Verkuil <hverkuil@kernel.org>,
	Stefan Schmidt <stefan.schmidt@linaro.org>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Stanimir Varbanov <stanimir.varbanov@linaro.org>,
	Jorge Ramirez-Ortiz <jorge.ramirez@oss.qualcomm.com>,
	Del Regno <angelogioacchino.delregno@collabora.com>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konradybcio@kernel.org>,
	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, iommu@lists.linux.dev,
	Krzysztof Kozlowski <krzk@kernel.org>,
	devicetree@vger.kernel.org
Subject: Re: [PATCH v5 11/14] media: iris: Add support to select core for dual core platforms
Date: Mon, 11 May 2026 21:42:43 +0530	[thread overview]
Message-ID: <a9658e1e-70ed-0c30-28d9-28966242a4eb@oss.qualcomm.com> (raw)
In-Reply-To: <qodaq4xoi6whna4phhrfbdfanfm43y7vmg4qxjuke5m3qgxozn@h2ot2a7w36xh>


On 5/9/2026 2:30 AM, Dmitry Baryshkov wrote:
> On Sat, May 09, 2026 at 12:30:00AM +0530, Vishnu Reddy wrote:
>> On platforms with dual vcodec cores, select the hardware core for a
>> session based on current load. Assign the session to vcodec0 if its
>> MBPF/MBPS capacity allows it, otherwise assign to vcodec1. Communicate
>> the selected core to firmware using the new HFI_PROP_CORE_ID property.
>>
>> Signed-off-by: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
>> ---
>>  drivers/media/platform/qcom/iris/iris_common.c     | 10 +++
>>  drivers/media/platform/qcom/iris/iris_common.h     |  1 +
>>  drivers/media/platform/qcom/iris/iris_core.h       |  5 ++
>>  drivers/media/platform/qcom/iris/iris_hfi_common.h |  1 +
>>  .../platform/qcom/iris/iris_hfi_gen2_command.c     | 19 ++++++
>>  .../platform/qcom/iris/iris_hfi_gen2_defines.h     |  1 +
>>  drivers/media/platform/qcom/iris/iris_instance.h   |  2 +
>>  .../platform/qcom/iris/iris_platform_common.h      |  1 +
>>  drivers/media/platform/qcom/iris/iris_power.c      | 11 ++--
>>  drivers/media/platform/qcom/iris/iris_utils.c      | 75 ++++++++++++++++------
>>  drivers/media/platform/qcom/iris/iris_vb2.c        |  4 ++
>>  drivers/media/platform/qcom/iris/iris_vidc.c       |  6 +-
>>  12 files changed, 113 insertions(+), 23 deletions(-)
>>
>> diff --git a/drivers/media/platform/qcom/iris/iris_common.c b/drivers/media/platform/qcom/iris/iris_common.c
>> index 7f1c7fe144f7..3b3fc482e194 100644
>> --- a/drivers/media/platform/qcom/iris/iris_common.c
>> +++ b/drivers/media/platform/qcom/iris/iris_common.c
>> @@ -46,6 +46,16 @@ void iris_set_ts_metadata(struct iris_inst *inst, struct vb2_v4l2_buffer *vbuf)
>>  	inst->metadata_idx++;
>>  }
>>  
>> +int iris_set_core_id(struct iris_inst *inst)
>> +{
>> +	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
>> +
>> +	if (!inst->core->iris_platform_data->dual_core)
>> +		return 0;
>> +
>> +	return hfi_ops->session_set_core_id(inst, inst->core_id);
>> +}
>> +
>>  int iris_process_streamon_input(struct iris_inst *inst)
>>  {
>>  	const struct iris_hfi_command_ops *hfi_ops = inst->core->hfi_ops;
>> diff --git a/drivers/media/platform/qcom/iris/iris_common.h b/drivers/media/platform/qcom/iris/iris_common.h
>> index b2a27b781c9a..34e32c60f768 100644
>> --- a/drivers/media/platform/qcom/iris/iris_common.h
>> +++ b/drivers/media/platform/qcom/iris/iris_common.h
>> @@ -11,6 +11,7 @@ struct iris_buffer;
>>  
>>  int iris_vb2_buffer_to_driver(struct vb2_buffer *vb2, struct iris_buffer *buf);
>>  void iris_set_ts_metadata(struct iris_inst *inst, struct vb2_v4l2_buffer *vbuf);
>> +int iris_set_core_id(struct iris_inst *inst);
>>  int iris_process_streamon_input(struct iris_inst *inst);
>>  int iris_process_streamon_output(struct iris_inst *inst);
>>  int iris_session_streamoff(struct iris_inst *inst, u32 plane);
>> diff --git a/drivers/media/platform/qcom/iris/iris_core.h b/drivers/media/platform/qcom/iris/iris_core.h
>> index b396c8cf595e..54a8649841e4 100644
>> --- a/drivers/media/platform/qcom/iris/iris_core.h
>> +++ b/drivers/media/platform/qcom/iris/iris_core.h
>> @@ -30,6 +30,11 @@ enum domain_type {
>>  	DECODER	= BIT(1),
>>  };
>>  
>> +enum iris_vcodec_core_id {
>> +	IRIS_VCODEC0 = 1,
>> +	IRIS_VCODEC1,
>> +};
>> +
>>  /**
>>   * struct iris_core - holds core parameters valid for all instances
>>   *
>> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_common.h b/drivers/media/platform/qcom/iris/iris_hfi_common.h
>> index 3edb5ae582b4..fbaf852a6b99 100644
>> --- a/drivers/media/platform/qcom/iris/iris_hfi_common.h
>> +++ b/drivers/media/platform/qcom/iris/iris_hfi_common.h
>> @@ -124,6 +124,7 @@ struct iris_hfi_command_ops {
>>  	int (*session_drain)(struct iris_inst *inst, u32 plane);
>>  	int (*session_resume_drain)(struct iris_inst *inst, u32 plane);
>>  	int (*session_close)(struct iris_inst *inst);
>> +	int (*session_set_core_id)(struct iris_inst *inst, u32 core_id);
>>  };
>>  
>>  struct iris_hfi_response_ops {
>> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
>> index 30bfd90d423b..9d9fae587297 100644
>> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
>> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
>> @@ -1300,6 +1300,24 @@ static int iris_hfi_gen2_session_release_buffer(struct iris_inst *inst, struct i
>>  					inst_hfi_gen2->packet->size);
>>  }
>>  
>> +static int iris_hfi_gen2_set_core_id(struct iris_inst *inst, u32 core_id)
>> +{
>> +	struct iris_inst_hfi_gen2 *inst_hfi_gen2 = to_iris_inst_hfi_gen2(inst);
>> +	u32 payload = core_id;
>> +
>> +	iris_hfi_gen2_packet_session_command(inst,
>> +					     HFI_PROP_CORE_ID,
>> +					     HFI_HOST_FLAGS_NONE,
>> +					     HFI_PORT_NONE,
>> +					     inst->session_id,
>> +					     HFI_PAYLOAD_U32,
>> +					     &payload,
>> +					     sizeof(u32));
>> +
>> +	return iris_hfi_queue_cmd_write(inst->core, inst_hfi_gen2->packet,
>> +					inst_hfi_gen2->packet->size);
>> +}
>> +
>>  static const struct iris_hfi_command_ops iris_hfi_gen2_command_ops = {
>>  	.sys_init = iris_hfi_gen2_sys_init,
>>  	.sys_image_version = iris_hfi_gen2_sys_image_version,
>> @@ -1317,6 +1335,7 @@ static const struct iris_hfi_command_ops iris_hfi_gen2_command_ops = {
>>  	.session_drain = iris_hfi_gen2_session_drain,
>>  	.session_resume_drain = iris_hfi_gen2_session_resume_drain,
>>  	.session_close = iris_hfi_gen2_session_close,
>> +	.session_set_core_id = iris_hfi_gen2_set_core_id,
>>  };
>>  
>>  void iris_hfi_gen2_command_ops_init(struct iris_core *core)
>> diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h b/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
>> index cecf771c55dd..600e9dc07669 100644
>> --- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
>> +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_defines.h
>> @@ -56,6 +56,7 @@
>>  #define HFI_PROP_BUFFER_HOST_MAX_COUNT		0x03000123
>>  #define HFI_PROP_BUFFER_FW_MIN_OUTPUT_COUNT	0x03000124
>>  #define HFI_PROP_PIC_ORDER_CNT_TYPE		0x03000128
>> +#define HFI_PROP_CORE_ID			0x030001a9
>>  
>>  enum hfi_rate_control {
>>  	HFI_RC_VBR_CFR		= 0x00000000,
>> diff --git a/drivers/media/platform/qcom/iris/iris_instance.h b/drivers/media/platform/qcom/iris/iris_instance.h
>> index 16965150f427..dd341ca5be57 100644
>> --- a/drivers/media/platform/qcom/iris/iris_instance.h
>> +++ b/drivers/media/platform/qcom/iris/iris_instance.h
>> @@ -37,6 +37,7 @@ struct iris_fmt {
>>   *
>>   * @list: used for attach an instance to the core
>>   * @core: pointer to core structure
>> + * @core_id: specifies the hardware core on which the session runs
>>   * @session_id: id of current video session
>>   * @ctx_q_lock: lock to serialize queues related ioctls
>>   * @lock: lock to seralise forward and reverse threads
>> @@ -79,6 +80,7 @@ struct iris_fmt {
>>  struct iris_inst {
>>  	struct list_head		list;
>>  	struct iris_core		*core;
>> +	u32				core_id;
>>  	u32				session_id;
>>  	struct mutex			ctx_q_lock;/* lock to serialize queues related ioctls */
>>  	struct mutex			lock; /* lock to serialize forward and reverse threads */
>> diff --git a/drivers/media/platform/qcom/iris/iris_platform_common.h b/drivers/media/platform/qcom/iris/iris_platform_common.h
>> index 8995136ad29e..502d7099085c 100644
>> --- a/drivers/media/platform/qcom/iris/iris_platform_common.h
>> +++ b/drivers/media/platform/qcom/iris/iris_platform_common.h
>> @@ -258,6 +258,7 @@ struct iris_platform_data {
>>  	const struct tz_cp_config *tz_cp_config_data;
>>  	u32 tz_cp_config_data_size;
>>  	u32 core_arch;
>> +	bool dual_core;
>>  	u32 hw_response_timeout;
>>  	struct ubwc_config_data *ubwc_config;
>>  	u32 num_vpp_pipe;
>> diff --git a/drivers/media/platform/qcom/iris/iris_power.c b/drivers/media/platform/qcom/iris/iris_power.c
>> index 91aa21d4070e..b72ce5b596b8 100644
>> --- a/drivers/media/platform/qcom/iris/iris_power.c
>> +++ b/drivers/media/platform/qcom/iris/iris_power.c
>> @@ -77,9 +77,9 @@ static int iris_vote_interconnects(struct iris_inst *inst)
>>  
>>  static int iris_set_clocks(struct iris_inst *inst)
>>  {
>> +	u64 vcodec0_freq = 0, vcodec1_freq = 0;
>>  	struct iris_core *core = inst->core;
>>  	struct iris_inst *instance;
>> -	u64 freq = 0;
>>  	int ret;
>>  
>>  	mutex_lock(&core->lock);
>> @@ -87,11 +87,14 @@ static int iris_set_clocks(struct iris_inst *inst)
>>  		if (!instance->max_input_data_size)
>>  			continue;
>>  
>> -		freq += instance->power.min_freq;
>> +		if (instance->core_id == IRIS_VCODEC0)
>> +			vcodec0_freq += instance->power.min_freq;
>> +		else
>> +			vcodec1_freq += instance->power.min_freq;
>>  	}
>>  
>> -	core->power.clk_freq = freq;
>> -	ret = iris_opp_set_rate(core->dev, freq);
>> +	core->power.clk_freq = max(vcodec0_freq, vcodec1_freq);
>> +	ret = iris_opp_set_rate(core->dev, core->power.clk_freq);
>>  	mutex_unlock(&core->lock);
>>  
>>  	return ret;
>> diff --git a/drivers/media/platform/qcom/iris/iris_utils.c b/drivers/media/platform/qcom/iris/iris_utils.c
>> index cfc5b576ec56..da8a89d3dd41 100644
>> --- a/drivers/media/platform/qcom/iris/iris_utils.c
>> +++ b/drivers/media/platform/qcom/iris/iris_utils.c
>> @@ -90,40 +90,79 @@ struct iris_inst *iris_get_instance(struct iris_core *core, u32 session_id)
>>  	return NULL;
>>  }
>>  
>> -int iris_check_core_mbpf(struct iris_inst *inst)
>> +static u32 iris_get_mbps(struct iris_inst *inst)
>>  {
>> -	struct iris_core *core = inst->core;
>> +	u32 fps = max(inst->frame_rate, inst->operating_rate);
>> +
>> +	return iris_get_mbpf(inst) * fps;
>> +}
>> +
>> +static int iris_check_and_assign_core(struct iris_inst *inst, bool mbpf)
>> +{
>> +	const struct iris_platform_data *platform_data = inst->core->iris_platform_data;
>> +	u32 max_load = mbpf ? platform_data->max_core_mbpf : platform_data->max_core_mbps;
>> +	u32 max_session_cnt = platform_data->max_session_count;
>> +	u32 core0_session_cnt = 0, core1_session_cnt = 0;
>> +	bool dual_core = platform_data->dual_core;
> num_cores

A num_cores field would require updating all platform data entries. For two
cores, a simple boolean flag feels sufficient here.

>> +	u32 core0_load = 0, core1_load = 0;
>> +	bool select_core0, select_core1;
>>  	struct iris_inst *instance;
>> -	u32 total_mbpf = 0;
>> +	u32 load, new_load;
>>  
>> -	mutex_lock(&core->lock);
>> -	list_for_each_entry(instance, &core->instances, list)
>> -		total_mbpf += iris_get_mbpf(instance);
>> -	mutex_unlock(&core->lock);
>> +	inst->core_id = 0;
>>  
>> -	if (total_mbpf > core->iris_platform_data->max_core_mbpf)
>> +	list_for_each_entry(instance, &inst->core->instances, list) {
>> +		load = mbpf ? iris_get_mbpf(instance) : iris_get_mbps(instance);
>> +
>> +		if (instance->core_id == IRIS_VCODEC0) {
>> +			core0_load += load;
>> +			core0_session_cnt++;
>> +		} else if (instance->core_id == IRIS_VCODEC1) {
>> +			core1_load += load;
>> +			core1_session_cnt++;
> Arrays, please.

Since we only have two cores, explicit variables feel cleaner and easier to
read than arrays.

>> +		}
>> +	}
>> +
>> +	new_load = mbpf ? iris_get_mbpf(inst) : iris_get_mbps(inst);
>> +
>> +	select_core0 = core0_load + new_load <= max_load && core0_session_cnt < max_session_cnt;
>> +	select_core1 = dual_core && core1_load + new_load <= max_load &&
>> +		     core1_session_cnt < max_session_cnt;
>> +
>> +	if (select_core0 && select_core1)
>> +		inst->core_id = (core0_load <= core1_load) ? IRIS_VCODEC0 : IRIS_VCODEC1;
>> +	else if (select_core0)
>> +		inst->core_id = IRIS_VCODEC0;
>> +	else if (select_core1)
>> +		inst->core_id = IRIS_VCODEC1;
>> +	else
>>  		return -ENOMEM;
>>  
>>  	return 0;
>>  }
>>  
>> -int iris_check_core_mbps(struct iris_inst *inst)
>> +int iris_check_core_mbpf(struct iris_inst *inst)
>>  {
>>  	struct iris_core *core = inst->core;
>> -	struct iris_inst *instance;
>> -	u32 total_mbps = 0, fps = 0;
>> +	int ret;
>>  
>>  	mutex_lock(&core->lock);
>> -	list_for_each_entry(instance, &core->instances, list) {
>> -		fps = max(instance->frame_rate, instance->operating_rate);
>> -		total_mbps += iris_get_mbpf(instance) * fps;
>> -	}
>> +	ret = iris_check_and_assign_core(inst, true);
>>  	mutex_unlock(&core->lock);
>>  
>> -	if (total_mbps > core->iris_platform_data->max_core_mbps)
>> -		return -ENOMEM;
>> +	return ret;
>> +}
>>  
>> -	return 0;
>> +int iris_check_core_mbps(struct iris_inst *inst)
>> +{
>> +	struct iris_core *core = inst->core;
>> +	int ret;
>> +
>> +	mutex_lock(&core->lock);
>> +	ret = iris_check_and_assign_core(inst, false);
>> +	mutex_unlock(&core->lock);
>> +
>> +	return ret;
>>  }
>>  
>>  bool is_rotation_90_or_270(struct iris_inst *inst)
>> diff --git a/drivers/media/platform/qcom/iris/iris_vb2.c b/drivers/media/platform/qcom/iris/iris_vb2.c
>> index bf0b8400996e..5a05f7d65501 100644
>> --- a/drivers/media/platform/qcom/iris/iris_vb2.c
>> +++ b/drivers/media/platform/qcom/iris/iris_vb2.c
>> @@ -176,6 +176,10 @@ int iris_vb2_start_streaming(struct vb2_queue *q, unsigned int count)
>>  	if (ret)
>>  		goto error;
>>  
>> +	ret = iris_set_core_id(inst);
>> +	if (ret)
>> +		goto error;
>> +
>>  	if (V4L2_TYPE_IS_OUTPUT(q->type)) {
>>  		if (inst->domain == DECODER)
>>  			ret = iris_vdec_streamon_input(inst);
>> diff --git a/drivers/media/platform/qcom/iris/iris_vidc.c b/drivers/media/platform/qcom/iris/iris_vidc.c
>> index 5eb1786b0737..a1ce3cd524a3 100644
>> --- a/drivers/media/platform/qcom/iris/iris_vidc.c
>> +++ b/drivers/media/platform/qcom/iris/iris_vidc.c
>> @@ -41,16 +41,20 @@ static void iris_v4l2_fh_deinit(struct iris_inst *inst, struct file *filp)
>>  
>>  static void iris_add_session(struct iris_inst *inst)
>>  {
>> +	u32 max_session_count = inst->core->iris_platform_data->max_session_count;
>>  	struct iris_core *core = inst->core;
>>  	struct iris_inst *iter;
>>  	u32 count = 0;
>>  
>> +	if (inst->core->iris_platform_data->dual_core)
>> +		max_session_count *= 2;
> max_session_count *= num_cores.
>
>> +
>>  	mutex_lock(&core->lock);
>>  
>>  	list_for_each_entry(iter, &core->instances, list)
>>  		count++;
>>  
>> -	if (count < core->iris_platform_data->max_session_count)
>> +	if (count < max_session_count)
>>  		list_add_tail(&inst->list, &core->instances);
>>  
>>  	mutex_unlock(&core->lock);
>>
>> -- 
>> 2.34.1
>>

  reply	other threads:[~2026-05-11 16:12 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-08 18:59 [PATCH v5 00/14] media: iris: Add support for glymur platform Vishnu Reddy
2026-05-08 18:59 ` [PATCH v5 01/14] media: iris: Add iris vpu bus support Vishnu Reddy
2026-05-08 19:16   ` Dmitry Baryshkov
2026-05-09 17:05     ` Vishnu Reddy
2026-05-08 23:20   ` sashiko-bot
2026-05-08 18:59 ` [PATCH v5 02/14] iommu: Add iris-vpu-bus to iommu_buses Vishnu Reddy
2026-05-08 19:16   ` Dmitry Baryshkov
2026-05-08 23:42   ` sashiko-bot
2026-05-08 18:59 ` [PATCH v5 03/14] media: iris: Fix VM count passed to firmware Vishnu Reddy
2026-05-08 19:20   ` Dmitry Baryshkov
2026-05-08 18:59 ` [PATCH v5 04/14] dt-bindings: media: qcom,venus: Remove clock, power-domain, and iommus from common schema Vishnu Reddy
2026-05-08 19:22   ` Dmitry Baryshkov
2026-05-09 17:04     ` Vishnu Reddy
2026-05-08 18:59 ` [PATCH v5 05/14] dt-bindings: media: qcom,glymur-iris: Add glymur video codec Vishnu Reddy
2026-05-08 18:59 ` [PATCH v5 06/14] media: iris: Add context bank hooks for platform specific initialization Vishnu Reddy
2026-05-09  0:41   ` sashiko-bot
2026-05-08 18:59 ` [PATCH v5 07/14] media: iris: Enable Secure PAS support with IOMMU managed by Linux Vishnu Reddy
2026-05-08 19:05   ` Trilok Soni
2026-05-11  8:06     ` Mukesh Ojha
2026-05-08 20:20   ` Dmitry Baryshkov
2026-05-11  8:01     ` Mukesh Ojha
2026-05-09  2:05   ` sashiko-bot
2026-05-08 18:59 ` [PATCH v5 08/14] media: iris: Rename clock and power domain macros to use vcodec prefix Vishnu Reddy
2026-05-08 20:22   ` Dmitry Baryshkov
2026-05-09 17:07     ` Vishnu Reddy
2026-05-09  2:18   ` sashiko-bot
2026-05-08 18:59 ` [PATCH v5 09/14] media: iris: Use power domain type to look up pd_devs index Vishnu Reddy
2026-05-08 20:44   ` Dmitry Baryshkov
2026-05-09 17:02     ` Vishnu Reddy
2026-05-08 18:59 ` [PATCH v5 10/14] media: iris: Add power sequence for Glymur Vishnu Reddy
2026-05-08 20:54   ` Dmitry Baryshkov
2026-05-11 16:12     ` Vishnu Reddy
2026-05-09  2:56   ` sashiko-bot
2026-05-08 19:00 ` [PATCH v5 11/14] media: iris: Add support to select core for dual core platforms Vishnu Reddy
2026-05-08 21:00   ` Dmitry Baryshkov
2026-05-11 16:12     ` Vishnu Reddy [this message]
2026-05-09  3:55   ` sashiko-bot
2026-05-08 19:00 ` [PATCH v5 12/14] media: iris: Add platform data for glymur Vishnu Reddy
2026-05-08 21:05   ` Dmitry Baryshkov
2026-05-11 16:15     ` Vishnu Reddy
2026-05-09  4:23   ` sashiko-bot
2026-05-08 19:00 ` [PATCH v5 13/14] arm64: dts: qcom: glymur: Add iris video node Vishnu Reddy
2026-05-08 19:27   ` Dmitry Baryshkov
2026-05-09 16:56     ` Vishnu Reddy
2026-05-08 19:00 ` [PATCH v5 14/14] arm64: dts: qcom: glymur-crd: Enable iris video codec node Vishnu Reddy
2026-05-08 23:54   ` Dmitry Baryshkov

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