[PATCH v2 0/2] drm/imagination: support GPU probe without power-domains

[Sterling-Ash]

This v2 reorders and extends the earlier standalone pvr_power.c change
per Alessio's review [1].

On the SpacemiT K3 SoC, the GPU power domain is enabled once by the bootloader
before Linux boots and is neither modelled nor switched by Linux at runtime.

As pointed out in review, img,powervr-rogue.yaml currently has no
compatible entry this platform's GPU can use, so patch 1 adds one
(spacemit,k3-gpu + img,img-bxm-4-64 + img,img-rogue) as its own oneOf
entry, distinct from thead,th1520-gpu since the two differ in clock
requirements. This new compatible doesn't match any of the schema's
existing per-compatible "if" blocks, so power-domains falls back to
the schema's default (optional) behaviour for it -- no additional
required/false override is needed.

Patch 2 is the previously-sent driver change: pvr_power_domains_init()
treats a missing "power-domains" property as "nothing to attach" instead of failing
probe with -ENOENT.

[1] https://lore.kernel.org/all/75c9382d2bda766aa459b00321153d715254d1a4.camel@xxxxxxxxxx/

Sterling-Ash (2):
  dt-bindings: gpu: img,powervr-rogue: add spacemit,k3-gpu
  drm/imagination: allow probe when no power-domains are described

 .../devicetree/bindings/gpu/img,powervr-rogue.yaml       | 5 +++++
 drivers/gpu/drm/imagination/pvr_power.c                  | 9 +++++++++
 2 files changed, 14 insertions(+)

-- 
2.34.1

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