linux-kernel - [PATCH v3 0/3] media: qcom: camss: Add sa8775p camss TPG support

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Message-ID: <20250822-camss_tpg-v3-0-c7833a5f10d0@quicinc.com>
Date: Fri, 22 Aug 2025 20:09:18 +0800
From: Wenmeng Liu <quic_wenmliu@...cinc.com>
To: Robert Foss <rfoss@...nel.org>, Todor Tomov <todor.too@...il.com>,
        "Bryan
 O'Donoghue" <bryan.odonoghue@...aro.org>,
        Vladimir Zapolskiy
	<vladimir.zapolskiy@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>,
        Wenmeng Liu <quic_wenmliu@...cinc.com>
Subject: [PATCH v3 0/3] media: qcom: camss: Add sa8775p camss TPG support

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
- 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-subdev4 -c test_pattern=9
- yavta -B capture-mplane -n 5 -f SRGGB10P -s 4608x2592 /dev/video0
  --capture=7

Dependencies:
https://lore.kernel.org/all/20250814101615.1102795-10-quic_vikramsa@quicinc.com/
https://lore.kernel.org/all/20250813053724.232494-1-quic_vikramsa@quicinc.com/

changes in v3:
- Change the payload mode string
- Change the method for setting the TPG clock rate
- Remove the TPG IRQ
- Format correction
- Remove unused variables
- Merge functions and eliminate redundancy
- Modify the register write method
- Change TPG matching method to use grp_id
- Encapsulate magic numbers as macros
- Link to v2: https://lore.kernel.org/all/20250717-lemans_tpg-v2-0-a2538659349c@quicinc.com/

Changes in v2:
- rebase tpg changes based on new versions of sa8775p and qcs8300 camss patches
- Link to v1: https://lore.kernel.org/all/20250211-sa8775p_tpg-v1-0-3f76c5f8431f@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 and QCS8300

 drivers/media/platform/qcom/camss/Makefile         |   2 +
 .../media/platform/qcom/camss/camss-csid-gen3.c    |  17 +
 drivers/media/platform/qcom/camss/camss-csid.c     |  43 +-
 drivers/media/platform/qcom/camss/camss-csiphy.c   |   1 +
 drivers/media/platform/qcom/camss/camss-csiphy.h   |   2 +
 drivers/media/platform/qcom/camss/camss-tpg-gen1.c | 219 +++++++
 drivers/media/platform/qcom/camss/camss-tpg.c      | 696 +++++++++++++++++++++
 drivers/media/platform/qcom/camss/camss-tpg.h      | 125 ++++
 drivers/media/platform/qcom/camss/camss.c          | 130 ++++
 drivers/media/platform/qcom/camss/camss.h          |   5 +
 10 files changed, 1226 insertions(+), 14 deletions(-)
---
base-commit: 6afac82056e38e02266cd30f458b25a1f9017508
change-id: 20250822-camss_tpg-718db678d984

Best regards,
-- 
Wenmeng Liu <quic_wenmliu@...cinc.com>