drm/panfrost: Add support for multiple power domains
When there is a single power domain per device, the core will ensure the power domain is switched on (so it is technically equivalent to having not power domain specified at all). However, when there are multiple domains, as in MT8183 Bifrost GPU, we need to handle them in driver code. Signed-off-by: Nicolas Boichat <drinkcat@chromium.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Steven Price <steven.price@arm.com> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200207052627.130118-6-drinkcat@chromium.org
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