diff options
Diffstat (limited to 'Documentation/sound')
| -rw-r--r-- | Documentation/sound/kernel-api/writing-an-alsa-driver.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/sound/kernel-api/writing-an-alsa-driver.rst b/Documentation/sound/kernel-api/writing-an-alsa-driver.rst index ba008ce28029..dcb7940435d9 100644 --- a/Documentation/sound/kernel-api/writing-an-alsa-driver.rst +++ b/Documentation/sound/kernel-api/writing-an-alsa-driver.rst @@ -1383,7 +1383,7 @@ shows only the skeleton, how to build up the PCM interfaces. /* pre-allocation of buffers */ /* NOTE: this may fail */ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, - snd_dma_pci_data(chip->pci), + &chip->pci->dev, 64*1024, 64*1024); return 0; } @@ -1470,7 +1470,7 @@ buffer. For the pre-allocation, simply call the following: :: snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, - snd_dma_pci_data(chip->pci), + &chip->pci->dev, 64*1024, 64*1024); It will allocate a buffer up to 64kB as default. Buffer management @@ -3514,7 +3514,7 @@ bus). :: snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, - snd_dma_pci_data(pci), size, max); + &pci->dev, size, max); where ``size`` is the byte size to be pre-allocated and the ``max`` is the maximum size to be changed via the ``prealloc`` proc file. The @@ -3700,14 +3700,14 @@ For creating the SG-buffer handler, call :c:func:`snd_pcm_lib_preallocate_pages()` or :c:func:`snd_pcm_lib_preallocate_pages_for_all()` with ``SNDRV_DMA_TYPE_DEV_SG`` in the PCM constructor like other PCI -pre-allocator. You need to pass ``snd_dma_pci_data(pci)``, where pci is +pre-allocator. You need to pass ``&pci->dev``, where pci is the :c:type:`struct pci_dev <pci_dev>` pointer of the chip as well. :: snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, - snd_dma_pci_data(pci), size, max); + &pci->dev, size, max); The ``struct snd_sg_buf`` instance is created as ``substream->dma_private`` in turn. You can cast the pointer like: |