[Intel-gfx] [RFC PATCH 0/9] drm/i915/spi: discrete graphics internal spi

[Jani Nikula]

On Tue, 16 Feb 2021, Tomas Winkler <tomas.winkler at intel.com> wrote:
> Intel discrete graphic devices have internal spi storage, that holds
> firmware and oprom images. The spi device is exposed to the user space
> via mtd framework to be accessed during manufacturing.
> The device is hardware locked after manufacturing and only read access
> is provided.
>
> The i915 plays role of a multi function device (mfd) and spi device
> is exposed as its child device. i915_spi platform driver binds to 
> this device.

What's the plan wrt i915/spi maintainership?

BR,
Jani.

>
> Because the graphic card may undergo reset at any time and basically hot
> unplug all its child devices, this series also provides a fix to the mtd
> framework to make the reset graceful.
>
> Tomas Winkler (9):
>   drm/i915/spi: add spi device for discrete graphics
>   drm/i915/spi: intel_spi_region map
>   drm/i915/spi: add driver for on-die spi device
>   drm/i915/spi: implement region enumeration
>   drm/i915/spi: implement spi access functions
>   drm/i915/spi: spi register with mtd
>   drm/i915/spi: mtd: implement access handlers
>   drm/i915/spi: serialize spi access
>   mtd: use refcount to prevent corruption
>
>  drivers/gpu/drm/i915/Kconfig             |   3 +
>  drivers/gpu/drm/i915/Makefile            |   6 +
>  drivers/gpu/drm/i915/i915_drv.c          |   9 +
>  drivers/gpu/drm/i915/i915_drv.h          |   4 +
>  drivers/gpu/drm/i915/i915_reg.h          |   1 +
>  drivers/gpu/drm/i915/spi/intel_spi.c     |  62 +++
>  drivers/gpu/drm/i915/spi/intel_spi.h     |  24 +
>  drivers/gpu/drm/i915/spi/intel_spi_drv.c | 675 +++++++++++++++++++++++
>  drivers/mtd/mtdcore.c                    |  63 ++-
>  drivers/mtd/mtdcore.h                    |   1 +
>  drivers/mtd/mtdpart.c                    |  13 +-
>  include/linux/mtd/mtd.h                  |   2 +-
>  12 files changed, 831 insertions(+), 32 deletions(-)
>  create mode 100644 drivers/gpu/drm/i915/spi/intel_spi.c
>  create mode 100644 drivers/gpu/drm/i915/spi/intel_spi.h
>  create mode 100644 drivers/gpu/drm/i915/spi/intel_spi_drv.c

-- 
Jani Nikula, Intel Open Source Graphics Center