linux-kernel - Re: [PATCH 1/2] media: venus: Add support for MSM8939

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Date:   Thu, 7 May 2020 11:13:25 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Konrad Dybcio <konradybcio@...il.com>
Cc:     skrzynka@...radybcio.pl, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        linux-media@...r.kernel.org, DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] media: venus: Add support for MSM8939

Hi Konrad,

On 5/7/20 12:23 AM, Konrad Dybcio wrote:
> Hi Stan,
> 
> I have found some issues with the submitted GCC driver, related to
> venus, but I have to further look into them locally and work out some
> stuff. One of the things is that freq table for venus clock should be
> changed to the values found here [1] (currently it has 8916
> frequencies). When I find all the causes I'll resubmit this and
> include them in the cover letter, as I might've overlooked something
> wrt venus driver itself when creating this patch from my WIP branch.
> Also it seems like I tested this very patch incorrectly (getting
> segfaults in ffmpeg with v4l2m2m now)... Anyways, I'll get back to you
> when I make it work for sure. Sorry again for the inconvenience.

OK. Thanks for the details, I'm waiting for good news :). If you need
some help with Venus bringup ping me on IRC - my nickname is svarbanov
on #v4l channel.

Regarding to venus clocks, these two clocks exist in below gcc driver
but missing in msm8916:

gcc_venus0_core0_vcodec0_clk
gcc_venus0_core1_vcodec0_clk

but the Venus IP block should be the same as in msm8916. Can you point
me to the donwstream gcc driver or check from where they comes.

> 
> 
> [1] https://github.com/konradybcio/android_kernel_asus_msm8916-1/blob/minimal/drivers/clk/qcom/clock-gcc-8936.c#L1613-L1618
> 
> Konrad
> 
> wt., 5 maj 2020 o 13:43 Stanimir Varbanov
> <stanimir.varbanov@...aro.org> napisał(a):
>>
>> Hi Konrad,
>>
>> On 5/1/20 11:35 PM, Konrad Dybcio wrote:
>>> Signed-off-by: Konrad Dybcio <konradybcio@...il.com>
>>> ---
>>>  drivers/media/platform/qcom/venus/core.c | 33 ++++++++++++++++++++++++
>>>  1 file changed, 33 insertions(+)
>>>
>>> diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
>>> index 194b10b987672..f3a15991ac763 100644
>>> --- a/drivers/media/platform/qcom/venus/core.c
>>> +++ b/drivers/media/platform/qcom/venus/core.c
>>> @@ -405,6 +405,38 @@ static const struct venus_resources msm8916_res = {
>>>       .fwname = "qcom/venus-1.8/venus.mdt",
>>>  };
>>>
>>> +static const struct freq_tbl msm8939_freq_table[] = {
>>> +     { 489600, 266670000 },  /* 1080p @ 60 */
>>> +     { 244800, 200000000 },  /* 1080p @ 30 */
>>> +     { 244800, 133330000 },  /* 1080p @ 30 (decode only) */
>>> +     { 220800, 133330000 },  /* 720p @ 60 (decode only?) */
>>> +     { 108000, 133330000 },  /* 720p @ 30*/
>>> +     { 72000, 133330000 },  /* VGA @ 60 */
>>> +     { 36000, 133330000 },  /* VGA @ 30 */
>>
>> 133MHz is the minimum clock frequency in the GCC driver? Do you think
>> that will change?
>>
>>> +};
>>> +
>>> +static const struct reg_val msm8939_reg_preset[] = {
>>> +     { 0xe0020, 0x0aaaaaaa },
>>> +     { 0xe0024, 0x0aaaaaaa },
>>> +     { 0x80124, 0x00000003 },
>>> +};
>>> +
>>> +static const struct venus_resources msm8939_res = {
>>> +     .freq_tbl = msm8939_freq_table,
>>> +     .freq_tbl_size = ARRAY_SIZE(msm8939_freq_table),
>>> +     .reg_tbl = msm8939_reg_preset,
>>> +     .reg_tbl_size = ARRAY_SIZE(msm8939_reg_preset),
>>> +     .clks = { "core", "iface", "bus", },
>>> +     .clks_num = 3,
>>> +     .max_load = 489600, /* 1080p @ 60 */
>>> +     .hfi_version = HFI_VERSION_1XX,
>>> +     .vmem_id = VIDC_RESOURCE_NONE,
>>> +     .vmem_size = 0,
>>> +     .vmem_addr = 0,
>>> +     .dma_mask = 0xddc00000 - 1,
>>> +     .fwname = "qcom/venus-1.8/venus.mdt",
>>> +};
>>> +
>>>  static const struct freq_tbl msm8996_freq_table[] = {
>>>       { 1944000, 520000000 }, /* 4k UHD @ 60 (decode only) */
>>>       {  972000, 520000000 }, /* 4k UHD @ 30 */
>>> @@ -567,6 +599,7 @@ 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,msm8939-venus", .data = &msm8939_res, },
>>>       { .compatible = "qcom,msm8996-venus", .data = &msm8996_res, },
>>>       { .compatible = "qcom,sdm845-venus", .data = &sdm845_res, },
>>>       { .compatible = "qcom,sdm845-venus-v2", .data = &sdm845_res_v2, },
>>>
>>
>> --
>> regards,
>> Stan

-- 
regards,
Stan