On Wed, Jul 28, 2021 at 01:23:49PM +0200, Takashi Iwai wrote:
> PCM buffers might be allocated dynamically when the buffer
> preallocation failed or a larger buffer is requested, and it's not
> guaranteed that substream->dma_buffer points to the actually used
> buffer.  The driver needs to refer to substream->runtime->dma_addr
> instead for the buffer address.

This breaks the build for me on an x86-64 allmodconfig:

/mnt/kernel/sound/soc/amd/renoir/acp3x-pdm-dma.c: In function 'acp_pdm_dma_hw_params':
/mnt/kernel/sound/soc/amd/renoir/acp3x-pdm-dma.c:245:18: error: 'runtime' undeclared (first use in this function); did you mean 'vtime'?
  rtd->dma_addr = runtime->dma_addr;
                  ^~~~~~~
                  vtime