linux-kernel - [PATCH v2 0/3] Add ADSP and CDSP support on Kaanapali SoC

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Message-Id: <20251015045702.3022060-1-kumari.pallavi@oss.qualcomm.com>
Date: Wed, 15 Oct 2025 10:26:59 +0530
From: Kumari Pallavi <kumari.pallavi@....qualcomm.com>
To: kpallavi@....qualcomm.com, srini@...nel.org, amahesh@....qualcomm.com,
        arnd@...db.de, gregkh@...uxfoundation.org
Cc: Kumari Pallavi <kumari.pallavi@....qualcomm.com>, quic_bkumar@...cinc.com,
        ekansh.gupta@....qualcomm.com, linux-kernel@...r.kernel.org,
        quic_chennak@...cinc.com, dri-devel@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, jingyi.wang@....qualcomm.com,
        aiqun.yu@....qualcomm.com, ktadakam@....qualcomm.com
Subject: [PATCH v2 0/3] Add ADSP and CDSP support on Kaanapali SoC

Introduces support for new DSP IOVA formatting and hardware-specific
configuration required to enable ADSP and CDSP functionality on the
Kaanapali SoC.

Add support for a new IOVA formatting scheme by adding a sid_pos to the DSP
driver. Sid_pos standardizes the placement of the stream ID (SID) within the
physical address, which is required for DSPs to operate correctly on
Kaanapali. DSP currently supports 32-bit IOVA (32-bit PA + 4-bit SID) for
both Q6 and user DMA (uDMA) access.
This is being upgraded to 34-bit PA + 4-bit SID due to a hardware revision
in CDSP for Kaanapali SoC, which expands the DMA addressable range.
To support CDSP operation, this series updates the DMA mask configuration
to reflect the expanded DMA addressable range.

Patch [v1]: https://lore.kernel.org/all/20250924-knp-fastrpc-v1-0-4b40f8bfce1d@oss.qualcomm.com/

Changes in v2:
  - Rename phys to dma_addr for clarity
  - Remove iova_format, add soc_data with sid_pos in channel ctx
  - Remove sid_pos and pa_bits from the session ctx

Kumari Pallavi (3):
  misc: fastrpc: Rename phys to dma_addr for clarity
  misc: fastrpc: Add support for new DSP IOVA formatting
  misc: fastrpc: Update dma_mask for CDSP support on Kaanapali SoC

 drivers/misc/fastrpc.c | 126 ++++++++++++++++++++++++++++-------------
 1 file changed, 88 insertions(+), 38 deletions(-)

-- 
2.34.1