[PATCH v1 11/18] media: hantro: Add helper function for auxiliary buffers allocation

[Ezequiel Garcia]

Hi Benjamin,

On Wed, 2021-02-17 at 09:02 +0100, Benjamin Gaignard wrote:
> Add helper functions to allocate and free auxiliary buffers.
> These buffers aren't for frames but are needed by the hardware
> to store scaling matrix, tiles size, border filters etc...
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard at collabora.com>
> Signed-off-by: Ezequiel Garcia <ezequiel at collabora.com>
> Signed-off-by: Adrian Ratiu <adrian.ratiu at collabora.com>
> ---
>  drivers/staging/media/hantro/hantro.h | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/drivers/staging/media/hantro/hantro.h b/drivers/staging/media/hantro/hantro.h
> index a9b80b2c9124..7f842edbc341 100644
> --- a/drivers/staging/media/hantro/hantro.h
> +++ b/drivers/staging/media/hantro/hantro.h
> @@ -446,6 +446,30 @@ hantro_get_dec_buf(struct hantro_ctx *ctx, struct vb2_buffer *vb)
>         return vb2_plane_vaddr(vb, 0);
>  }
>  
> +static inline int
> +hantro_aux_buf_alloc(struct hantro_dev *vpu,
> +                    struct hantro_aux_buf *buf, size_t size)
> +{

Can you add convert the dma_alloc_ calls in the driver,
and squash it in this patch?

I.e. hantro_h264_dec_init, hantro_vp8_dec_init, etc.

Thanks!
Ezequiel

> +       buf->cpu = dma_alloc_coherent(vpu->dev, size, &buf->dma, GFP_KERNEL);
> +       if (!buf->cpu)
> +               return -ENOMEM;
> +
> +       buf->size = size;
> +       return 0;
> +}
> +
> +static inline void
> +hantro_aux_buf_free(struct hantro_dev *vpu,
> +                   struct hantro_aux_buf *buf)
> +{
> +       if (buf->cpu)
> +               dma_free_coherent(vpu->dev, buf->size, buf->cpu, buf->dma);
> +
> +       buf->cpu = NULL;
> +       buf->dma = 0;
> +       buf->size = 0;
> +}
> +
>  void hantro_postproc_disable(struct hantro_ctx *ctx);
>  void hantro_postproc_enable(struct hantro_ctx *ctx);
>  void hantro_postproc_free(struct hantro_ctx *ctx);