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media: venus: Update clock scaling and core selection

PATCH Superseded Aniket Masule 1 participant 6 messages May 30, 2019

Subsystems (4)
Media (V4L/DVB) Arm Qualcomm mailing list Qualcomm media platform Qualcomm venus video accelerator driver

v1 of 7 Superseded Latest is v7 →

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Aniket Masule

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#0 lore raw

cover media: venus: Update clock scaling and core selection

In this patch series, clock scaling and core selection methods are updated. Current clock scaling and core selection methods are same for vpu4 and previous versions. Introducing load calculations using vpp cycles, which indicates the cycles required by video hardware to process each macroblock. Clock scaling is now done more precisely using vpp cycles. Instance is assigned to core with minimum load, instead of of static assignment.

Aniket Masule (5):
media: venus: Add codec data table
media: venus: Initialize codec data
media: venus: Update clock scaling
media: venus: Add interface for load per core
media: venus: Update core selection

 drivers/media/platform/qcom/venus/core.c       |  13 ++
 drivers/media/platform/qcom/venus/core.h       |  15 ++
 drivers/media/platform/qcom/venus/helpers.c    | 189 +++++++++++++++++++++++--
 drivers/media/platform/qcom/venus/helpers.h    |   3 +-
 drivers/media/platform/qcom/venus/hfi_helper.h |   1 +
 drivers/media/platform/qcom/venus/hfi_parser.h |   5 +
 drivers/media/platform/qcom/venus/vdec.c       |   9 +-
 drivers/media/platform/qcom/venus/venc.c       |   8 +-
 8 files changed, 229 insertions(+), 14 deletions(-)
Signature · 2 lines
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
author
#1 lore raw

PATCH 1/5 media: venus: Add codec data table

Add vpp cycles for for different types of codec It indicates the cycles required by video hardware to process each macroblock.

Signed-off-by Aniket Masule <[email protected]>
---
 drivers/media/platform/qcom/venus/core.c | 13 +++++++++++++
 drivers/media/platform/qcom/venus/core.h | 15 +++++++++++++++
 2 files changed, 28 insertions(+)
drivers/media/platform/qcom/venus/core.c +13 -0
index 7393667..e7ebea1 100644
@@ -473,9 +473,22 @@ static __maybe_unused int venus_runtime_resume(struct device *dev)
 	{  244800, 100000000 },	/* 1920x1080@30 */
 };
 
+static struct codec_data sdm845_codec_data[] =  {
+	{ V4L2_PIX_FMT_H264, VIDC_SESSION_TYPE_ENC, 125 },
+	{ V4L2_PIX_FMT_HEVC, VIDC_SESSION_TYPE_ENC, 125 },
+	{ V4L2_PIX_FMT_VP8, VIDC_SESSION_TYPE_ENC, 125 },
+	{ V4L2_PIX_FMT_MPEG2, VIDC_SESSION_TYPE_DEC, 50 },
+	{ V4L2_PIX_FMT_H264, VIDC_SESSION_TYPE_DEC, 50 },
+	{ V4L2_PIX_FMT_HEVC, VIDC_SESSION_TYPE_DEC, 50 },
+	{ V4L2_PIX_FMT_VP8, VIDC_SESSION_TYPE_DEC, 50 },
+	{ V4L2_PIX_FMT_VP9, VIDC_SESSION_TYPE_DEC, 50 },
+};
+
 static const struct venus_resources sdm845_res = {
 	.freq_tbl = sdm845_freq_table,
 	.freq_tbl_size = ARRAY_SIZE(sdm845_freq_table),
+	.codec_data = sdm845_codec_data,
+	.codec_data_size = ARRAY_SIZE(sdm845_codec_data),
 	.clks = {"core", "iface", "bus" },
 	.clks_num = 3,
 	.max_load = 2563200,
drivers/media/platform/qcom/venus/core.h +15 -0
index 7a3feb5..b1a9b43 100644
@@ -35,12 +35,20 @@ struct reg_val {
 	u32 value;
 };
 
+struct codec_data {
+u32 pixfmt;
+u32 session_type;
+int vpp_cycles;
+};
+
 struct venus_resources {
 	u64 dma_mask;
 	const struct freq_tbl *freq_tbl;
 	unsigned int freq_tbl_size;
 	const struct reg_val *reg_tbl;
 	unsigned int reg_tbl_size;
+	const struct codec_data *codec_data;
+	unsigned int codec_data_size;
 	const char * const clks[VIDC_CLKS_NUM_MAX];
 	unsigned int clks_num;
 	enum hfi_version hfi_version;

@@ -216,6 +224,12 @@ struct venus_buffer {
 	struct list_head ref_list;
 };
 
+struct clock_data {
+	u32 core_id;
+	unsigned long freq;
+	struct codec_data *codec_data;
+};
+
 #define to_venus_buffer(ptr)	container_of(ptr, struct venus_buffer, vb)
 
 /**

@@ -275,6 +289,7 @@ struct venus_inst {
 	struct list_head list;
 	struct mutex lock;
 	struct venus_core *core;
+	struct clock_data clk_data;
 	struct list_head dpbbufs;
 	struct list_head internalbufs;
 	struct list_head registeredbufs;
Signature · 2 lines
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
author
#2 lore raw

PATCH 2/5 media: venus: Initialize codec data

In reply to Aniket Masule

Initialize the codec data with core resources.

Signed-off-by Aniket Masule <[email protected]>
---
 drivers/media/platform/qcom/venus/helpers.c | 30 +++++++++++++++++++++++++++++
 drivers/media/platform/qcom/venus/helpers.h |  1 +
 drivers/media/platform/qcom/venus/vdec.c    |  4 ++++
 drivers/media/platform/qcom/venus/venc.c    |  4 ++++
 4 files changed, 39 insertions(+)
drivers/media/platform/qcom/venus/helpers.c +30 -0
index 5cad601..f7f724b 100644
@@ -715,6 +715,36 @@ int venus_helper_set_core_usage(struct venus_inst *inst, u32 usage)
 }
 EXPORT_SYMBOL_GPL(venus_helper_set_core_usage);
 
+int venus_helper_init_codec_data(struct venus_inst *inst)
+{
+	const struct codec_data *codec_data;
+	unsigned int i, codec_data_size;
+	u32 pixfmt;
+	int ret = 0;
+
+	if (!IS_V4(inst->core))
+		return 0;
+
+	codec_data = inst->core->res->codec_data;
+	codec_data_size = inst->core->res->codec_data_size;
+	pixfmt = inst->session_type == VIDC_SESSION_TYPE_DEC ?
+			inst->fmt_out->pixfmt : inst->fmt_cap->pixfmt;
+
+	for (i = 0; i < codec_data_size; i++) {
+		if (codec_data[i].pixfmt == pixfmt &&
+		    codec_data[i].session_type == inst->session_type) {
+			inst->clk_data.codec_data = &codec_data[i];
+			break;
+		}
+	}
+
+	if (!inst->clk_data.codec_data)
+		ret = -EINVAL;
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(venus_helper_init_codec_data);
+
 int venus_helper_set_num_bufs(struct venus_inst *inst, unsigned int input_bufs,
 			      unsigned int output_bufs,
 			      unsigned int output2_bufs)
drivers/media/platform/qcom/venus/helpers.h +1 -0
index 2475f284..f9360a8 100644
@@ -41,6 +41,7 @@ int venus_helper_set_output_resolution(struct venus_inst *inst,
 				       unsigned int width, unsigned int height,
 				       u32 buftype);
 int venus_helper_set_work_mode(struct venus_inst *inst, u32 mode);
+int venus_helper_init_codec_data(struct venus_inst *inst);
 int venus_helper_set_core_usage(struct venus_inst *inst, u32 usage);
 int venus_helper_set_num_bufs(struct venus_inst *inst, unsigned int input_bufs,
 			      unsigned int output_bufs,
drivers/media/platform/qcom/venus/vdec.c +4 -0
index 282de21..51795fd 100644
@@ -660,6 +660,10 @@ static int vdec_init_session(struct venus_inst *inst)
 	if (ret)
 		goto deinit;
 
+	ret = venus_helper_init_codec_data(inst);
+	if (ret)
+		goto deinit;
+
 	return 0;
 deinit:
 	hfi_session_deinit(inst);
drivers/media/platform/qcom/venus/venc.c +4 -0
index 32cff29..792cdce 100644
@@ -847,6 +847,10 @@ static int venc_init_session(struct venus_inst *inst)
 	if (ret)
 		goto deinit;
 
+	ret = venus_helper_init_codec_data(inst);
+	if (ret)
+		goto deinit;
+
 	ret = venc_set_properties(inst);
 	if (ret)
 		goto deinit;
Signature · 2 lines
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
author
#3 lore raw

PATCH 3/5 media: venus: Update clock scaling

In reply to Aniket Masule

Current clock scaling calculations are same for vpu4 and previous versions. For vpu4, Clock scaling calculations are updated with cycles/mb. This helps in getting precise clock required.

Signed-off-by Aniket Masule <[email protected]>
---
 drivers/media/platform/qcom/venus/helpers.c | 91 +++++++++++++++++++++++++++--
 1 file changed, 87 insertions(+), 4 deletions(-)
drivers/media/platform/qcom/venus/helpers.c +87 -4
index f7f724b..f2470af 100644
@@ -348,8 +348,9 @@ static u32 load_per_type(struct venus_core *core, u32 session_type)
 	return mbs_per_sec;
 }
 
-static int load_scale_clocks(struct venus_core *core)
+static int scale_clocks(struct venus_inst *inst)
 {
+	struct venus_core *core = inst->core;
 	const struct freq_tbl *table = core->res->freq_tbl;
 	unsigned int num_rows = core->res->freq_tbl_size;
 	unsigned long freq = table[0].freq;

@@ -398,6 +399,89 @@ static int load_scale_clocks(struct venus_core *core)
 	return ret;
 }
 
+static unsigned long calculate_inst_freq(struct venus_inst *inst,
+					 u32 filled_len)
+{
+	unsigned long vpp_cycles = 0;
+	u32 mbs_per_sec;
+
+	mbs_per_sec = load_per_instance(inst);
+	vpp_cycles = mbs_per_sec * inst->clk_data.codec_data->vpp_cycles;
+	/* 21 / 20 is overhead factor */
+	vpp_cycles += vpp_cycles / 20;
+
+	return vpp_cycles;
+}
+
+static int scale_clocks_vpu4(struct venus_inst *inst)
+{
+	struct venus_core *core = inst->core;
+	const struct freq_tbl *table = core->res->freq_tbl;
+	unsigned int num_rows = core->res->freq_tbl_size;
+
+	struct clk *clk = core->clks[0];
+	struct device *dev = core->dev;
+
+	unsigned int i;
+	u32 filled_len = 0;
+	unsigned long freq = 0, freq_core0 = 0, freq_core1 = 0;
+	int ret;
+
+	freq = calculate_inst_freq(inst, filled_len);
+
+	if (freq > table[0].freq)
+		goto err;
+
+	for (i = 0; i < num_rows; i++) {
+		if (freq > table[i].freq)
+			break;
+		freq = table[i].freq;
+	}
+
+	inst->clk_data.freq = freq;
+
+	mutex_lock(&core->lock);
+	list_for_each_entry(inst, &core->instances, list) {
+		if (inst->clk_data.core_id == VIDC_CORE_ID_1) {
+			freq_core0 += inst->clk_data.freq;
+		} else if (inst->clk_data.core_id == VIDC_CORE_ID_2) {
+			freq_core1 += inst->clk_data.freq;
+		} else if (inst->clk_data.core_id == VIDC_CORE_ID_3) {
+			freq_core0 += inst->clk_data.freq;
+			freq_core1 += inst->clk_data.freq;
+		}
+	}
+	mutex_unlock(&core->lock);
+
+	freq = max(freq_core0, freq_core1);
+
+	ret = clk_set_rate(clk, freq);
+	if (ret)
+		goto err;
+
+	ret = clk_set_rate(core->core0_clk, freq);
+	if (ret)
+		goto err;
+
+	ret = clk_set_rate(core->core1_clk, freq);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	dev_err(dev, "failed to set clock rate %lu (%d)\n", freq, ret);
+	return ret;
+}
+
+static int load_scale_clocks(struct venus_inst *inst)
+{
+	if (IS_V3(inst->core) || IS_V1(inst->core))
+		return scale_clocks(inst);
+	else
+		return scale_clocks_vpu4(inst);
+}
+
 static void fill_buffer_desc(const struct venus_buffer *buf,
 			     struct hfi_buffer_desc *bd, bool response)
 {

@@ -1053,7 +1137,7 @@ void venus_helper_vb2_stop_streaming(struct vb2_queue *q)
 
 		venus_helper_free_dpb_bufs(inst);
 
-		load_scale_clocks(core);
+		load_scale_clocks(inst);
 		INIT_LIST_HEAD(&inst->registeredbufs);
 	}
 

@@ -1070,7 +1154,6 @@ void venus_helper_vb2_stop_streaming(struct vb2_queue *q)
 
 int venus_helper_vb2_start_streaming(struct venus_inst *inst)
 {
-	struct venus_core *core = inst->core;
 	int ret;
 
 	ret = intbufs_alloc(inst);

@@ -1081,7 +1164,7 @@ int venus_helper_vb2_start_streaming(struct venus_inst *inst)
 	if (ret)
 		goto err_bufs_free;
 
-	load_scale_clocks(core);
+	load_scale_clocks(inst);
 
 	ret = hfi_session_load_res(inst);
 	if (ret)
Signature · 2 lines
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
author
#4 lore raw

PATCH 4/5 media: venus: Add interface for load per core

In reply to Aniket Masule

Add and interface to calculate load per core. Also, add an interface to get maximum cores available with video. This interface is preparation for updating core selection.

Signed-off-by Aniket Masule <[email protected]>
---
 drivers/media/platform/qcom/venus/helpers.c    | 18 ++++++++++++++++++
 drivers/media/platform/qcom/venus/hfi_helper.h |  1 +
 drivers/media/platform/qcom/venus/hfi_parser.h |  5 +++++
 3 files changed, 24 insertions(+)
drivers/media/platform/qcom/venus/helpers.c +18 -0
index f2470af..692ba3b 100644
@@ -331,6 +331,24 @@ static u32 load_per_instance(struct venus_inst *inst)
 	return mbs * inst->fps;
 }
 
+static u32 load_per_core(struct venus_core *core, u32 core_id)
+{
+	struct venus_inst *inst = NULL;
+	u32 mbs_per_sec = 0, load = 0;
+
+	mutex_lock(&core->lock);
+	list_for_each_entry(inst, &core->instances, list) {
+		if (!(inst->clk_data.core_id == core_id))
+			continue;
+
+		mbs_per_sec += load_per_instance(inst);
+		load += mbs_per_sec * inst->clk_data.codec_data->vpp_cycles;
+	}
+	mutex_unlock(&core->lock);
+
+	return load;
+}
+
 static u32 load_per_type(struct venus_core *core, u32 session_type)
 {
 	struct venus_inst *inst = NULL;
drivers/media/platform/qcom/venus/hfi_helper.h +1 -0
index 34ea503..3677e2e 100644
@@ -559,6 +559,7 @@ struct hfi_bitrate {
 #define HFI_CAPABILITY_LCU_SIZE				0x14
 #define HFI_CAPABILITY_HIER_P_HYBRID_NUM_ENH_LAYERS	0x15
 #define HFI_CAPABILITY_MBS_PER_SECOND_POWERSAVE		0x16
+#define HFI_CAPABILITY_MAX_VIDEOCORES          0x2B
 
 struct hfi_capability {
 	u32 capability_type;
drivers/media/platform/qcom/venus/hfi_parser.h +5 -0
index 3e931c7..264e6dd 100644
@@ -107,4 +107,9 @@ static inline u32 frate_step(struct venus_inst *inst)
 	return cap_step(inst, HFI_CAPABILITY_FRAMERATE);
 }
 
+static inline u32 core_num_max(struct venus_inst *inst)
+{
+	return cap_max(inst, HFI_CAPABILITY_MAX_VIDEOCORES);
+}
+
 #endif
Signature · 2 lines
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
author
#5 lore raw

PATCH 5/5 media: venus: Update core selection

In reply to Aniket Masule

Present core assignment is static. Introduced load balancing across the cores. Load on earch core is calculated and core with minimum load is assigned to given instance.

Signed-off-by Aniket Masule <[email protected]>
---
 drivers/media/platform/qcom/venus/helpers.c | 50 +++++++++++++++++++++++++----
 drivers/media/platform/qcom/venus/helpers.h |  2 +-
 drivers/media/platform/qcom/venus/vdec.c    |  5 +--
 drivers/media/platform/qcom/venus/venc.c    |  4 ++-
 4 files changed, 51 insertions(+), 10 deletions(-)
drivers/media/platform/qcom/venus/helpers.c +44 -6
index 692ba3b..6ce202f 100644
@@ -500,6 +500,16 @@ static int load_scale_clocks(struct venus_inst *inst)
 		return scale_clocks_vpu4(inst);
 }
 
+int set_core_usage(struct venus_inst *inst, u32 usage)
+{
+	const u32 ptype = HFI_PROPERTY_CONFIG_VIDEOCORES_USAGE;
+	struct hfi_videocores_usage_type cu;
+
+	cu.video_core_enable_mask = usage;
+
+	return hfi_session_set_property(inst, ptype, &cu);
+}
+
 static void fill_buffer_desc(const struct venus_buffer *buf,
 			     struct hfi_buffer_desc *bd, bool response)
 {

@@ -803,19 +813,47 @@ int venus_helper_set_work_mode(struct venus_inst *inst, u32 mode)
 }
 EXPORT_SYMBOL_GPL(venus_helper_set_work_mode);
 
-int venus_helper_set_core_usage(struct venus_inst *inst, u32 usage)
+int venus_helper_decide_core(struct venus_inst *inst, u32 cores_max)
 {
-	const u32 ptype = HFI_PROPERTY_CONFIG_VIDEOCORES_USAGE;
-	struct hfi_videocores_usage_type cu;
+	struct venus_core *core = inst->core;
+	u32 min_core_id = 0, core0_load = 0, core1_load = 0;
+	unsigned long min_load, max_freq, cur_inst_load;
+	int ret;
 
 	if (!IS_V4(inst->core))
 		return 0;
 
-	cu.video_core_enable_mask = usage;
+	core0_load = load_per_core(core, VIDC_CORE_ID_1);
+	core1_load = load_per_core(core, VIDC_CORE_ID_2);
 
-	return hfi_session_set_property(inst, ptype, &cu);
+	min_core_id = core0_load < core1_load ? VIDC_CORE_ID_1 : VIDC_CORE_ID_2;
+	min_load = min(core0_load, core1_load);
+
+	if (cores_max < VIDC_CORE_ID_1) {
+		min_core_id = VIDC_CORE_ID_1;
+		min_load = core0_load;
+	}
+
+	cur_inst_load = load_per_instance(inst) *
+		inst->clk_data.codec_data->vpp_cycles;
+	max_freq = core->res->freq_tbl[0].freq;
+
+	if ((cur_inst_load + min_load)	> max_freq) {
+		dev_warn(core->dev, "HW is overloaded, needed: %lu max: %lu\n",
+			 cur_inst_load, max_freq);
+		return -EINVAL;
+	}
+
+	ret = set_core_usage(inst, min_core_id);
+
+	if (ret)
+		return ret;
+
+	inst->clk_data.core_id = min_core_id;
+
+	return 0;
 }
-EXPORT_SYMBOL_GPL(venus_helper_set_core_usage);
+EXPORT_SYMBOL_GPL(venus_helper_decide_core);
 
 int venus_helper_init_codec_data(struct venus_inst *inst)
 {
drivers/media/platform/qcom/venus/helpers.h +1 -1
index f9360a8..c41ceb3 100644
@@ -42,7 +42,7 @@ int venus_helper_set_output_resolution(struct venus_inst *inst,
 				       u32 buftype);
 int venus_helper_set_work_mode(struct venus_inst *inst, u32 mode);
 int venus_helper_init_codec_data(struct venus_inst *inst);
-int venus_helper_set_core_usage(struct venus_inst *inst, u32 usage);
+int venus_helper_decide_core(struct venus_inst *inst, u32 cores_max);
 int venus_helper_set_num_bufs(struct venus_inst *inst, unsigned int input_bufs,
 			      unsigned int output_bufs,
 			      unsigned int output2_bufs);
drivers/media/platform/qcom/venus/vdec.c +3 -2
index 51795fd..9f988ba 100644
@@ -544,14 +544,15 @@ static int vdec_output_conf(struct venus_inst *inst)
 	u32 height = inst->out_height;
 	u32 out_fmt, out2_fmt;
 	bool ubwc = false;
-	u32 ptype;
+	u32 ptype, cores_max;
 	int ret;
 
 	ret = venus_helper_set_work_mode(inst, VIDC_WORK_MODE_2);
 	if (ret)
 		return ret;
 
-	ret = venus_helper_set_core_usage(inst, VIDC_CORE_ID_1);
+	cores_max = core_num_max(inst);
+	ret = venus_helper_decide_core(inst, cores_max);
 	if (ret)
 		return ret;
drivers/media/platform/qcom/venus/venc.c +3 -1
index 792cdce..ed39efd 100644
@@ -654,13 +654,15 @@ static int venc_set_properties(struct venus_inst *inst)
 	struct hfi_quantization quant;
 	struct hfi_quantization_range quant_range;
 	u32 ptype, rate_control, bitrate, profile = 0, level = 0;
+	u32 cores_max;
 	int ret;
 
 	ret = venus_helper_set_work_mode(inst, VIDC_WORK_MODE_2);
 	if (ret)
 		return ret;
 
-	ret = venus_helper_set_core_usage(inst, VIDC_CORE_ID_2);
+	cores_max = core_num_max(inst);
+	ret = venus_helper_decide_core(inst, cores_max);
 	if (ret)
 		return ret;
Signature · 2 lines
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project