media: ti: j721e-csi2rx: Support multiple pixels per clock

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Add support for negotiating the highest possible pixel mode (from
single, dual, quad) with the Cadence CSI2RX bridge. This is required to
drain the Cadence stream FIFOs without overflowing when the source is
operating at a high link-frequency [1].

Also, update the Kconfig as this introduces a hard build-time dependency
on the Cadence CSI2RX driver, even for a COMPILE_TEST.

[1] Section 12.6.1.4.8.14 CSI_RX_IF Programming Restrictions of AM62 TRM

Link: https://www.ti.com/lit/pdf/spruj16
Tested-by: Yemike Abhilash Chandra <y-abhilashchandra@ti.com> (on SK-AM68)
Signed-off-by: Jai Luthra <jai.luthra@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

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Jai Luthra 2025-08-11 13:50:18 +05:30 • committed by Hans Verkuil

parent 7b78fa8622

commit 31f91c5224

2 changed files with 36 additions and 4 deletions

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3

drivers/media/platform/ti/Kconfig

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37

drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c

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