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SubjectRe: [RFC PATCH v4 00/14] Support for Tegra video capture from external sensor
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Thierry, Dmitry,

I'm happy with this series from a media perspective. However, patches 1-5 fix
various i2c-tegra.c issues and patch 12 changes mipi calibration functions in
drivers/gpu that patch 13 relies on.

I think the i2c-tegra.c patches can be merged independently into the i2c
subsystem, but patch 12 needs to be merged with the media patches. So for patch
12 I need an Acked-by from Thierry.

I can also take the i2c-tegra patches if preferred, but there too I need Acks.
Dmitry, can you either take these i2c patches, or reply with Acks if you want
me to take it?

Regards,

Hans


On 24/07/2020 01:50, Sowjanya Komatineni wrote:
> This series adds support for video capture from external camera sensor to
> Tegra video driver.
>
> Jetson TX1 has camera expansion connector and supports custom camera module
> designed as per TX1 design specification.
>
> This series also enables camera capture support for Jetson Nano which has
> Raspberry PI camera header.
>
> This series is tested with IMX219 camera sensor.
>
> This series include,
>
> VI I2C related fixes
> - Camera sensor programming happens through VI I2C which is on host1x bus.
> - These patches includes device tree and I2C driver fixes for VI I2C.
>
> Tegra video driver updates
> - TPG Vs Non-TPG based on Kconfig
> - Support for external sensor video capture based on device graph from DT.
> - Support for selection ioctl operations
> - Tegra MIPI CSI pads calibration
> - CSI T-CLK and T-HS settle time computation based on clock rates.
>
> Host1x driver updates
> - Adds API to allow creating mipi device for specific device node.
> - Splits MIPI pads calibrate start and waiting for calibration to be done.
>
> Device tree updates
> - Adds camera connector 2V8, 1V8, 1V2 regulator supplies to Jetson TX1 DT.
> - Enabled VI and CSI support in Jetson Nano DT.
>
>
> Delta between patch versions:
> [v4]: Includes below fix based on v3 feedback
> - Patches are based on latest linux-next.
> - With split of tegra_mipi_calibrate() and tegra_mipi_wait(), mipi
> clock is not left enabled till calibration done. This series adds
> a patch to fix this by keeping clock enabled till calibration is
> done.
>
> Note:
> Patch-0010 has compilation dependency on
> https://patchwork.kernel.org/patch/11659521/
>
> [v3]: Includes v2 feedback
> - Uses separate helper function for retrieving remote csi subdevice
> and source subdevice.
> - Added check for presence of subdevice ops set/get_selection
> - dropped vb2_queue_release from driver and using
> vb2_video_unregister_device instead of video_unregister_device.
> - video device register should happen in the last after all video
> device related setup is done in the driver. This is being addressed
> in below RFC patch. Once proper implementation of this is available
> will update Tegra video driver to use split APIs and do all setup
> prior to device register. Added this as TODO in the driver.
> https://www.spinics.net/lists/linux-media/msg172761.html
>
> Note:
> Patch-0012 has compilation dependency on
> https://patchwork.kernel.org/patch/11659521/
>
>
> [v2]: Includes below changes based on v1 feedback
> - dt-binding document and the driver update for device graph to use
> separate ports for sink endpoint and source endpoint for csi.
> - Use data-lanes endpoint property for csi.
> - Update tegra_mipi_request() to take device node pointer argument
> rather than adding extra API.
> - Remove checking for clk pointer before clk_disable.
>
>
> Sowjanya Komatineni (14):
> i2c: tegra: Don't mark VI I2C as IRQ safe runtime PM
> i2c: tegra: Remove NULL pointer check before
> clk_enable/disable/prepare/unprepare
> i2c: tegra: Fix the error path in tegra_i2c_runtime_resume
> i2c: tegra: Fix runtime resume to re-init VI I2C
> i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c
> media: tegra-video: Fix channel format alignment
> media: tegra-video: Enable TPG based on kernel config
> media: tegra-video: Update format lookup to offset based
> dt-bindings: tegra: Update VI and CSI bindings with port info
> media: tegra-video: Add support for external sensor capture
> media: tegra-video: Add support for selection ioctl ops
> gpu: host1x: mipi: Keep MIPI clock enabled till calibration is done
> media: tegra-video: Add CSI MIPI pads calibration
> media: tegra-video: Compute settle times based on the clock rate
>
> .../display/tegra/nvidia,tegra20-host1x.txt | 92 ++-
> drivers/gpu/drm/tegra/dsi.c | 4 +-
> drivers/gpu/host1x/mipi.c | 19 +-
> drivers/i2c/busses/i2c-tegra.c | 101 +--
> drivers/staging/media/tegra-video/Kconfig | 7 +
> drivers/staging/media/tegra-video/csi.c | 258 ++++++-
> drivers/staging/media/tegra-video/csi.h | 8 +
> drivers/staging/media/tegra-video/tegra210.c | 25 +-
> drivers/staging/media/tegra-video/vi.c | 800 +++++++++++++++++++--
> drivers/staging/media/tegra-video/vi.h | 25 +-
> drivers/staging/media/tegra-video/video.c | 23 +-
> include/linux/host1x.h | 5 +-
> 12 files changed, 1224 insertions(+), 143 deletions(-)
>

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