linux-kernel - Re: [PATCH 1/5] media: venus: Add codec data table

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Date:   Thu, 20 Jun 2019 13:41:58 +0530
From:   amasule@...eaurora.org
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, vgarodia@...eaurora.org
Subject: Re: [PATCH 1/5] media: venus: Add codec data table

Hi Stan,

On 2019-06-17 14:07, Stanimir Varbanov wrote:
> Hi Aniket,
> 
> On 6/11/19 9:05 AM, Aniket Masule wrote:
>> 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 <amasule@...eaurora.org>
>> ---
>>  drivers/media/platform/qcom/venus/core.c | 13 +++++++++++++
>>  drivers/media/platform/qcom/venus/core.h | 15 +++++++++++++++
>>  2 files changed, 28 insertions(+)
>> 
>> diff --git a/drivers/media/platform/qcom/venus/core.c 
>> b/drivers/media/platform/qcom/venus/core.c
>> index 7393667..43eb446 100644
>> --- a/drivers/media/platform/qcom/venus/core.c
>> +++ b/drivers/media/platform/qcom/venus/core.c
>> @@ -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, 675 },
>> +	{ V4L2_PIX_FMT_HEVC, VIDC_SESSION_TYPE_ENC, 675 },
>> +	{ V4L2_PIX_FMT_VP8, VIDC_SESSION_TYPE_ENC, 675 },
>> +	{ V4L2_PIX_FMT_MPEG2, VIDC_SESSION_TYPE_DEC, 200 },
>> +	{ V4L2_PIX_FMT_H264, VIDC_SESSION_TYPE_DEC, 200 },
>> +	{ V4L2_PIX_FMT_HEVC, VIDC_SESSION_TYPE_DEC, 200 },
>> +	{ V4L2_PIX_FMT_VP8, VIDC_SESSION_TYPE_DEC, 200 },
>> +	{ V4L2_PIX_FMT_VP9, VIDC_SESSION_TYPE_DEC, 200 },
>> +};
>> +
>>  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,
>> diff --git a/drivers/media/platform/qcom/venus/core.h 
>> b/drivers/media/platform/qcom/venus/core.h
>> index 7a3feb5..b1a9b43 100644
>> --- a/drivers/media/platform/qcom/venus/core.h
>> +++ b/drivers/media/platform/qcom/venus/core.h
>> @@ -35,12 +35,20 @@ struct reg_val {
>>  	u32 value;
>>  };
>> 
>> +struct codec_data {
> 
> The name is very generic, could you rename the structure to something
> like vpp_cycles_data?
> 
I will be adding vsp_cycles with next patch for bitrate based clock 
scaling.
So, I could rename it to codec_cycles_data.

>> +u32 pixfmt;
>> +u32 session_type;
>> +int vpp_cycles;
> 
> please check your editor, those fields should have a tab to the right.
> 
>> +};
>> +
>>  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;
> 
> I cannot see how this 'freq' structure field is used? I can see that 
> you
> fill it in 3/5 patch but you don't used nowhere.
> 
Yes Stan, I will remove 'freq' from clock data structure.

>> +	struct codec_data *codec_data;
>> +};
> 
> Having the fact that freq field seems not needed can we just merge the
> fields in venus_inst structure?
> 
I will be adding 'freq' with next patch for bitrate based clock scaling.
So, it would be easier if we maintain separate structure from this 
patch.
>> +
>>  #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;
>>