6.6-stable review patch. If anyone has any objections, please let me know.
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From: Sasha Finkelstein fnkl.kernel@gmail.com
commit 8d55e8a16f019211163f1180fd9f9fbe05901900 upstream.
The ADMAC attached to the AOP has complex power sequencing, and is power gated when the probe callback runs. Move the register reads to other functions, where we can guarantee that the hardware is switched on.
Fixes: 568aa6dd641f ("dmaengine: apple-admac: Allocate cache SRAM to channels") Signed-off-by: Sasha Finkelstein fnkl.kernel@gmail.com Link: https://lore.kernel.org/r/20241124-admac-power-v1-1-58f2165a4d55@gmail.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/dma/apple-admac.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)
--- a/drivers/dma/apple-admac.c +++ b/drivers/dma/apple-admac.c @@ -153,6 +153,8 @@ static int admac_alloc_sram_carveout(str { struct admac_sram *sram; int i, ret = 0, nblocks; + ad->txcache.size = readl_relaxed(ad->base + REG_TX_SRAM_SIZE); + ad->rxcache.size = readl_relaxed(ad->base + REG_RX_SRAM_SIZE);
if (dir == DMA_MEM_TO_DEV) sram = &ad->txcache; @@ -912,12 +914,7 @@ static int admac_probe(struct platform_d goto free_irq; }
- ad->txcache.size = readl_relaxed(ad->base + REG_TX_SRAM_SIZE); - ad->rxcache.size = readl_relaxed(ad->base + REG_RX_SRAM_SIZE); - dev_info(&pdev->dev, "Audio DMA Controller\n"); - dev_info(&pdev->dev, "imprint %x TX cache %u RX cache %u\n", - readl_relaxed(ad->base + REG_IMPRINT), ad->txcache.size, ad->rxcache.size);
return 0;