# Short summary This patch series extends the Qualcomm CAMSS (Camera Subsystem), including CSID and CSIPHY components, to support C-PHY mode configuration.
# Background and motivation Modern smartphone cameras increasingly rely on MIPI C-PHY rather than D-PHY, thanks to its higher data throughput and signal efficiency. As a result, many OEMs adopt C-PHY interfaces for main (rear) cameras on Qualcomm-based devices. Until now, mainline Linux lacked C-PHY configuration support for Qualcomm chipsets, preventing bring-up of primary camera sensors on several Snapdragon platforms. This series closes that gap. - Introduces C-PHY configuration support for the CAMSS driver stack, covering both CSID and CSIPHY blocks. - Successfully enables C-PHY operation on the Snapdragon 845 platform. - Tested on OnePlus 6 and 6T phones running mainline Linux, using the Sony IMX519 main camera sensor. - The new configuration allows other chipsets versionsto enable C-PHY by simply adding corresponding sensor driver support and csiphy initialization data, following the example set for sdm845. With this patch series, mainline Linux gains working C-PHY support for Snapdragon 845, paving the way for improved main camera functionality across many Qualcomm-based devices. The groundwork also simplifies future enablement efforts for additional SoCs and sensors. Signed-off-by: David Heidelberg <[email protected]> --- Casey Connolly (1): media: qcom: camss: csiphy-3ph: Add Gen2 v1.1 MIPI CSI-2 CPHY init David Heidelberg (6): media: qcom: camss: csiphy: Introduce C-PHY media: qcom: camss: csiphy-3ph: Use odd bits for configuring C-PHY lanes media: qcom: camss: Prepare CSID for C-PHY support media: qcom: camss: csiphy-3ph: Use sdm845 C-PHY configuration sequence media: qcom: camss: Account for C-PHY when calculating link frequency media: qcom: camss: Remove D-PHY-only endpoint restriction Petr Hodina (1): media: qcom: camss: Initialize lanes after lane configuration is available .../media/platform/qcom/camss/camss-csid-gen2.c | 1 + drivers/media/platform/qcom/camss/camss-csid.c | 3 +- drivers/media/platform/qcom/camss/camss-csid.h | 1 + .../platform/qcom/camss/camss-csiphy-3ph-1-0.c | 165 ++++++++++++++++----- drivers/media/platform/qcom/camss/camss-csiphy.c | 6 +- drivers/media/platform/qcom/camss/camss-csiphy.h | 2 + drivers/media/platform/qcom/camss/camss.c | 24 ++- drivers/media/platform/qcom/camss/camss.h | 2 +- 8 files changed, 146 insertions(+), 58 deletions(-) --- base-commit: 9c0826a5d9aa4d52206dd89976858457a2a8a7ed change-id: 20251109-qcom-cphy-bb8cbda1c644 Best regards, -- David Heidelberg <[email protected]>
