Date:   Mon, 25 Jan 2021 16:01:01 +0100
From:   Hans Verkuil <hverkuil@...all.nl>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     agross@...nel.org, bjorn.andersson@...aro.org, mchehab@...nel.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, konrad.dybcio@...ainline.org,
        marijn.suijten@...ainline.org, phone-devel@...r.kernel.org
Subject: Re: [PATCH 1/2] media: venus: core: Add sdm660 DT compatible and
 resource struct

On 25/01/2021 15:51, AngeloGioacchino Del Regno wrote:
> Il 25/01/21 11:40, Hans Verkuil ha scritto:
>> On 18/01/2021 18:45, AngeloGioacchino Del Regno wrote:
>>> Il 18/01/21 18:21, Stanimir Varbanov ha scritto:
>>>> Hi Angelo,
>>>>
>>>> Thanks for the patch!
>>>>
>>>> On 1/15/21 8:52 PM, AngeloGioacchino Del Regno wrote:
>>>>> Add the SDM660 DT compatible and its resource structure, also
>>>>> including support for the Venus pmdomains, in order to support
>>>>> the Venus block in SDM630, SDM636, SDM660 and SDA variants.
>>>>>
>>>>> This SoC features Venus 4.4 (HFI3XX), with one vcodec used for
>>>>> both encoding and decoding, switched on through two GDSCs.
>>>>> The core clock for this Venus chip is powered by the RPM VDD_CX
>>>>> power domain.
>>>>>
>>>>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
>>>>> ---
>>>>>    drivers/media/platform/qcom/venus/core.c | 66 ++++++++++++++++++++++++
>>>>>    1 file changed, 66 insertions(+)
>>>>>
>>>>> diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
>>>>> index bdd293faaad0..83ca86a63241 100644
>>>>> --- a/drivers/media/platform/qcom/venus/core.c
>>>>> +++ b/drivers/media/platform/qcom/venus/core.c
>>>>> @@ -565,6 +565,71 @@ static const struct venus_resources sdm845_res_v2 = {
>>>>>    	.fwname = "qcom/venus-5.2/venus.mdt",
>>>>>    };
>>>>>    
>>>>> +static const struct freq_tbl sdm660_freq_table[] = {
>>>>> +	{ 0, 518400000 },
>>>>> +	{ 0, 441600000 },
>>>>> +	{ 0, 404000000 },
>>>>> +	{ 0, 320000000 },
>>>>> +	{ 0, 269330000 },
>>>>> +	{ 0, 133330000 },
>>>>> +};
>>>>> +
>>>>> +static const struct reg_val sdm660_reg_preset[] = {
>>>>> +	{ 0x80010, 0x001f001f },
>>>>> +	{ 0x80018, 0x00000156 },
>>>>> +	{ 0x8001C, 0x00000156 },
>>>>> +};
>>>>> +
>>>>> +static const struct bw_tbl sdm660_bw_table_enc[] = {
>>>>> +	{  979200,  1044000, 0, 2446336, 0 },	/* 4k UHD @ 30 */
>>>>> +	{  864000,   887000, 0, 2108416, 0 },	/* 720p @ 240 */
>>>>> +	{  489600,   666000, 0, 1207296, 0 },	/* 1080p @ 60 */
>>>>> +	{  432000,   578000, 0, 1058816, 0 },	/* 720p @ 120 */
>>>>> +	{  244800,   346000, 0,  616448, 0 },	/* 1080p @ 30 */
>>>>> +	{  216000,   293000, 0,  534528, 0 },	/* 720p @ 60 */
>>>>> +	{  108000,   151000, 0,  271360, 0 },	/* 720p @ 30 */
>>>>> +};
>>>>> +
>>>>> +static const struct bw_tbl sdm660_bw_table_dec[] = {
>>>>> +	{  979200,  2365000, 0, 1892000, 0 },	/* 4k UHD @ 30 */
>>>>> +	{  864000,  1978000, 0, 1554000, 0 },	/* 720p @ 240 */
>>>>> +	{  489600,  1133000, 0,  895000, 0 },	/* 1080p @ 60 */
>>>>> +	{  432000,   994000, 0,  781000, 0 },	/* 720p @ 120 */
>>>>> +	{  244800,   580000, 0,  460000, 0 },	/* 1080p @ 30 */
>>>>> +	{  216000,   501000, 0,  301000, 0 },	/* 720p @ 60 */
>>>>> +	{  108000,   255000, 0,  202000, 0 },	/* 720p @ 30 */
>>>>> +};
>>>>> +
>>>>> +static const struct venus_resources sdm660_res = {
>>>>> +	.freq_tbl = sdm660_freq_table,
>>>>> +	.freq_tbl_size = ARRAY_SIZE(sdm660_freq_table),
>>>>> +	.reg_tbl = sdm660_reg_preset,
>>>>> +	.reg_tbl_size = ARRAY_SIZE(sdm660_reg_preset),
>>>>> +	.bw_tbl_enc = sdm660_bw_table_enc,
>>>>> +	.bw_tbl_enc_size = ARRAY_SIZE(sdm660_bw_table_enc),
>>>>> +	.bw_tbl_dec = sdm660_bw_table_dec,
>>>>> +	.bw_tbl_dec_size = ARRAY_SIZE(sdm660_bw_table_dec),
>>>>> +	.clks = {"core", "iface", "bus_throttle", "bus" },
>>>>> +	.clks_num = 4,
>>>>> +	.vcodec0_clks = { "vcodec0_core" },
>>>>> +	.vcodec_clks_num = 1,
>>>>> +	.vcodec_pmdomains = { "venus", "vcodec0" },
>>>>> +	.vcodec_pmdomains_num = 2,
>>>>> +	.opp_pmdomain = (const char *[]) { "cx", NULL },
>>>>> +	.vcodec_num = 1,
>>>>> +	.max_load = 1036800,
>>>>> +	.hfi_version = HFI_VERSION_3XX,
>>>>> +	.vmem_id = VIDC_RESOURCE_NONE,
>>>>> +	.vmem_size = 0,
>>>>> +	.vmem_addr = 0,
>>>>> +	.cp_start = 0,
>>>>> +	.cp_size = 0x79000000,
>>>>> +	.cp_nonpixel_start = 0x1000000,
>>>>> +	.cp_nonpixel_size = 0x28000000,
>>>>> +	.dma_mask = 0xd9000000 - 1,
>>>>> +	.fwname = "qcom/venus-4.4/venus.mdt",
>>>>
>>>> Did you try venus-4.2 firmware from linux-firmware tree [1] ?
>>>>
>>>
>>> No I haven't.. and I can't... my Sony devices (but I think that this is
>>> a practice of all OEMs/ODMs) are using a Sony signed venus firmware, so
>>> I am totally limited to use the firmware that comes with the device.
>>>
>>> Besides that, the version is still different so, even if I had any
>>> possibility to try that, I don't think that it would work anyway...
> 
> Hello!
> 
>>
>> I'm a bit confused. "qcom/venus-4.4/venus.mdt" is the Sony signed FW?
>>
> 
> In my case it is, but this follows the generic firmware path as was done
> for all the other Venus firmwares, so my code is not pointing at Sony
> specific things, but just generic ones.
> 
> Every Qualcomm-powered consumer device (smartphones, tablets etc) have
> got a double sigcheck: one for qcom, one for OEM specific and most of
> the times the TZ is configured to accept only firmwares that also have
> the OEM signature.
> 
> This is not true for all the firmwares - for example, Adreno has this
> mechanism only for the ZAP part - but unfortunately I'm not aware of
> any consumer device accepting a Venus firmware with the "generic"
> Qualcomm signature only (so - without the OEM signature).
> 
> Short answer:
> 1. qcom/venus-4.4/venus.mdt is a generic firmware for Venus

So can this FW be made available in the linux-firmware repo? Stanimir?

> 2. 99% of the people needs a different firmware for signature issues
> 
> 
>> This patch can't be merged unless there is a corresponding firmware available
>> in linux-firmware. Is the current 4.2 firmware in linux-firmware signed by
>> Qualcomm? Can they provided 4.4 firmware as well?
>>
> 
> If there is such issue, then maybe we should do "something" about it: I
> would then propose to remove all references to fwname and just get this
> done in DT, where every qcom board already specifies its own path for
> its own firmware.
> 
> In any case, the issue that you're raising here has been raised multiple
> times on LKML, I don't precisely remember, but I recall seeing this for
> something like 4 years (or even more) being raised every now and then...
> 
>> I have no idea how this works for the venus driver, but I hope Stanimir does.
>>
> 
> As far as I've understood, this driver just uses the firmware which
> path is hardcoded in fwname, even though at this point I would like
> to get an opinion from Stanimir.
> 
> Would you be ok if we start parsing firmware-name from DT for this
> driver? The flow would be something like:
> 
> Is firmware-name DT property present?
>     Yes -> Use FW path from firmware-name property
>     No  -> Use the FW path from the fwname field of struct
>            venus_resources
> 
> This is a common flow in at least freedreno and remoteproc (modem).

I would have no problem with this, but it is up to Stanimir to decide.

Regards,

	Hans

> 
> -- Angelo
> 
>> Regards,
>>
>> 	Hans
>>
>>>
>>>>> +};
>>>>> +
>>>>>    static const struct freq_tbl sc7180_freq_table[] = {
>>>>>    	{  0, 500000000 },
>>>>>    	{  0, 434000000 },
>>>>> @@ -613,6 +678,7 @@ static const struct venus_resources sc7180_res = {
>>>>>    static const struct of_device_id venus_dt_match[] = {
>>>>>    	{ .compatible = "qcom,msm8916-venus", .data = &msm8916_res, },
>>>>>    	{ .compatible = "qcom,msm8996-venus", .data = &msm8996_res, },
>>>>> +	{ .compatible = "qcom,sdm660-venus", .data = &sdm660_res, },
>>>>>    	{ .compatible = "qcom,sdm845-venus", .data = &sdm845_res, },
>>>>>    	{ .compatible = "qcom,sdm845-venus-v2", .data = &sdm845_res_v2, },
>>>>>    	{ .compatible = "qcom,sc7180-venus", .data = &sc7180_res, },
>>>>>
>>>>
>>>> Reviewed-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
>>>>
>>>
>>> Thank you!
>>> - Angelo
>>>
>>
> 

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