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    ASoC: samsung: get access to DMA engine early to defer probe properly · 73f5dfc6
    Marek Szyprowski 提交于
    ASoC Samsung sub-drivers tried to get access to their DMA engine
    controllers as a last step in driver probe. If a DMA engine was not
    available yet, samsung_asoc_dma_platform_register() function ended in
    -EPROBE_DEFER, but the driver already registered its component to ASoC
    core. This patch moves samsung_asoc_dma_platform_register() call before
    registering any components, to the common place, where driver was gathering
    all needed resources.
    
    In case of Samsung Exynos i2s driver the issue was even worse. The driver
    managed already to register its secondary DAI platform device before
    even getting the DMA engine access. That together with -EPROBE_DEFER error
    code from samsung_i2s_probe() immediately triggered another round of
    deferred probe retry and in turn endless loop of driver probing.
    
    This patch fixes broken boot on Odroid XU3 and other Exynos5422-based
    boards.
    Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
    Reviewed-by: NJavier Martinez Canillas <javier@osg.samsung.com>
    Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
    Signed-off-by: NMark Brown <broonie@kernel.org>
    73f5dfc6
i2s.c 35.7 KB