linux-kernel - [PATCH v4 0/4] misc: fastrpc: Add polling mode support

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Message-Id: <20251128050534.437755-1-ekansh.gupta@oss.qualcomm.com>
Date: Fri, 28 Nov 2025 10:35:30 +0530
From: Ekansh Gupta <ekansh.gupta@....qualcomm.com>
To: srini@...nel.org, linux-arm-msm@...r.kernel.org
Cc: gregkh@...uxfoundation.org, quic_bkumar@...cinc.com,
        linux-kernel@...r.kernel.org, quic_chennak@...cinc.com,
        dri-devel@...ts.freedesktop.org, arnd@...db.de,
        dmitry.baryshkov@....qualcomm.com
Subject: [PATCH v4 0/4] misc: fastrpc: Add polling mode support

This patch series adds polling mode feature that have been missing in
upstream FastRPC driver.

- Add changes to move fdlist to ctx structure to avoid code duplicacy.
- Update context mask to support polling mode.
- Add changes to support polling feature.

Userspace change: https://github.com/qualcomm/fastrpc/pull/258
Patch [v3]: https://lore.kernel.org/all/20251113064111.2426325-1-ekansh.gupta@oss.qualcomm.com/

Changes in v4:
  - Replace hardcoded ctxid mask with GENMASK.
  - Fixed commit text.

Changes in v3:
  - Resolve compilation warning.

Changes in v2:
  - Added comments and fixed commit text.
  - Defined context id position as a macro.
  - Added new IOCTL to control polling mode as always enabling
    it might cause excess power consumption.
  - Cleaned up polling mode implementation.

Ekansh Gupta (4):
  misc: fastrpc: Move fdlist to invoke context structure
  misc: fastrpc: Replace hardcoded ctxid mask with GENMASK
  misc: fastrpc: Expand context ID mask for DSP polling mode support
  misc: fastrpc: Add polling mode support for fastRPC driver

 drivers/misc/fastrpc.c      | 164 +++++++++++++++++++++++++++++++-----
 include/uapi/misc/fastrpc.h |   9 ++
 2 files changed, 151 insertions(+), 22 deletions(-)

-- 
2.34.1