linux-kernel - Re: [PATCH 0/3] media: qcom: camss: Add sa8775p camss TPG support

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Message-ID: <84fd283a-ca87-4689-8955-855f7275d6d1@quicinc.com>
Date: Mon, 7 Apr 2025 18:15:18 +0800
From: Wenmeng Liu <quic_wenmliu@...cinc.com>
To: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Robert Foss
	<rfoss@...nel.org>, Todor Tomov <todor.too@...il.com>,
        Mauro Carvalho Chehab
	<mchehab@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH 0/3] media: qcom: camss: Add sa8775p camss TPG support

On 2025/2/11 18:19, Bryan O'Donoghue wrote:
> On 11/02/2025 10:07, Wenmeng Liu wrote:
>> SA8775P is a Qualcomm SoC. This series adds driver changes to
>> bring up the TPG interfaces in SA8775P.
>>
>> We have tested this on qcs9100-ride board with 'Test Pattern Generator'.
>> Unlike CSID TPG, this TPG can be seen as a combination of CSIPHY and 
>> sensor.
>>
>> Tested with following commands:
>> - media-ctl --reset
>> - v4l2-ctl -d /dev/v4l-subdev0 -c test_pattern=0
>> - media-ctl -V '"msm_tpg0":0[fmt:SRGGB10/4608x2592 field:none]'
>> - media-ctl -V '"msm_csid0":0[fmt:SRGGB10/4608x2592 field:none]'
>> - media-ctl -V '"msm_vfe0_rdi0":0[fmt:SRGGB10/4608x2592 field:none]'
>> - media-ctl -l '"msm_tpg0":1->"msm_csid0":0[1]'
>> - media-ctl -l '"msm_csid0":1->"msm_vfe0_rdi0":0[1]'
>> - v4l2-ctl -d /dev/v4l-subdev0 -c test_pattern=9
>> - yavta -B capture-mplane -n 5 -f SRGGB10P -s 4608x2592 /dev/video0
>>    --capture=7
>>
>> Used following tools for the sanity check of these changes.
>>
>> - make -j32 W=1
>> - ./scripts/checkpatch.pl
>>
>> ---
>> This patch series depends on patch series:
>> https://lore.kernel.org/linux-media/20250210162843.609337-1-quic_vikramsa@quicinc.com/
>> ---
>>
>> ---
>> Wenmeng Liu (3):
>>        media: qcom: camss: Add support for TPG common
>>        media: qcom: camss: Add link support for TPG common
>>        media: qcom: camss: tpg: Add TPG support for SA8775P
>>
>>   drivers/media/platform/qcom/camss/Makefile         |   2 +
>>   drivers/media/platform/qcom/camss/camss-csid-690.c |  15 +
>>   drivers/media/platform/qcom/camss/camss-csid.c     |  44 +-
>>   drivers/media/platform/qcom/camss/camss-tpg-gen1.c | 245 +++++++
>>   drivers/media/platform/qcom/camss/camss-tpg.c      | 737 
>> +++++++++++++++++++++
>>   drivers/media/platform/qcom/camss/camss-tpg.h      | 130 ++++
>>   drivers/media/platform/qcom/camss/camss.c          | 113 ++++
>>   drivers/media/platform/qcom/camss/camss.h          |   5 +
>>   8 files changed, 1282 insertions(+), 9 deletions(-)
>> ---
>> base-commit: c1696380f08cf7cc68560a11f2e8c51cb24aa7ba
>> change-id: 20250211-sa8775p_tpg-7de227a82eb4
>>
>> Best regards,
> 
> Great to see this work.
> 
> I think the TPG should be another type of PHY.
> 
> ---
> bod

Hi bryan,

Do you mean to handle TPG like CSIPHY and embed it into the CSIPHY driver?

thanks
Wenmeng