On 13.10.2025 10:35, Maxime Ripard wrote:
The CMA code, in addition to the reserved-memory regions in the device tree, will also register a default CMA region if the device tree doesn't provide any, with its size and position coming from either the kernel command-line or configuration.
Let's register that one for use to create a heap for it.
Reviewed-by: T.J. Mercier tjmercier@google.com Signed-off-by: Maxime Ripard mripard@kernel.org
Acked-by: Marek Szyprowski m.szyprowski@samsung.com
kernel/dma/contiguous.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index d67e95094749d45f43c1809c175e491a3f55b2e1..d8fd6f779f797f711b8e0fd628f868d644b8f784 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -240,17 +240,23 @@ void __init dma_contiguous_reserve(phys_addr_t limit) selected_size = max(size_bytes, cma_early_percent_memory()); #endif } if (selected_size && !dma_contiguous_default_area) {
int ret;- pr_debug("%s: reserving %ld MiB for global area\n", __func__, (unsigned long)selected_size / SZ_1M);
dma_contiguous_reserve_area(selected_size, selected_base, selected_limit, &dma_contiguous_default_area, fixed);
ret = dma_heap_cma_register_heap(dma_contiguous_default_area);if (ret)pr_warn("Couldn't register default CMA heap.");void __weak dma_contiguous_early_fixup(phys_addr_t base, unsigned long size)
Best regards