linux-kernel - [PATCH v8 0/3] media: qcom: camss: Add camss TPG support for multiple targets

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Message-Id: <20260113-camss_tpg-v8-0-fa2cb186a018@oss.qualcomm.com>
Date: Tue, 13 Jan 2026 17:03:25 +0800
From: Wenmeng Liu <wenmeng.liu@....qualcomm.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 <wenmeng.liu@....qualcomm.com>
Subject: [PATCH v8 0/3] media: qcom: camss: Add camss TPG support for
 multiple targets

This series adds driver changes to bring up the TPG interfaces
in LeMans, Monaco, Hamoa.

We have tested this on LeMans EVK board and qcs8300-ride board and
Hamoa EVK 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-subdev1 -c test_pattern=9
- yavta -B capture-mplane -n 5 -f SRGGB10P -s 4608x2592 /dev/video2
  --capture=7

Changes in v8:
- Fix error bit operation. -- Bryan
- Add tpg link check for tpg enable/disable in csid node stream on.
- Link to v7: https://lore.kernel.org/r/20251226-camss_tpg-v7-0-ccb536734805@oss.qualcomm.com

Changes in V7:
- Add TPG support for Hamoa
- Add differentiation of register bitfields based on hardware version number.
- Fix the null pointer issue when TPG clock is 0.
- Correct the clock dependency for TPG.
- Link to V6: https://lore.kernel.org/all/20251114-camss_tpg-v6-0-38d3d9fbe339@oss.qualcomm.com/

Changes in V6:
- Addressed comments from Bryan and Konrad.
- Add exception handling for the streamon format.
- Link to V5: https://lore.kernel.org/all/20251017-camss_tpg-v5-0-cafe3ad42163@oss.qualcomm.com/

Changes in V5:
- Modify the commit message and change the chip names to LeMans and Monaco.
- Add the header file to resolve the compilation error.
- Remove the definition where tpg_num is 0.
- Link to v4: https://lore.kernel.org/all/20250925-camss_tpg-v4-0-d2eb099902c8@oss.qualcomm.com/

Changes in V4:
- Rebase changes
- Use GENMASK to define bit fields and avoid using tabs. Use FIELD_PREP and FIELD_GET uniformly to access bit fields.
- Link to V3: https://lore.kernel.org/all/20250822-camss_tpg-v3-0-c7833a5f10d0@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 common TPG support
      media: qcom: camss: Add link support for TPG
      media: qcom: camss: tpg: Add TPG support for multiple targets

 drivers/media/platform/qcom/camss/Makefile         |   2 +
 drivers/media/platform/qcom/camss/camss-csid-680.c |  14 +
 .../media/platform/qcom/camss/camss-csid-gen3.c    |  14 +
 drivers/media/platform/qcom/camss/camss-csid.c     |  45 +-
 drivers/media/platform/qcom/camss/camss-csid.h     |   1 +
 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 | 257 ++++++++
 drivers/media/platform/qcom/camss/camss-tpg.c      | 710 +++++++++++++++++++++
 drivers/media/platform/qcom/camss/camss-tpg.h      | 127 ++++
 drivers/media/platform/qcom/camss/camss.c          | 183 ++++++
 drivers/media/platform/qcom/camss/camss.h          |   5 +
 12 files changed, 1347 insertions(+), 14 deletions(-)
---
base-commit: f417b7ffcbef7d76b0d8860518f50dae0e7e5eda
change-id: 20251226-camss_tpg-b23a398bb65a

Best regards,
-- 
Wenmeng <wenmeng.liu@....qualcomm.com>