Hi Lubomir,
On Sun, May 05, 2019 at 04:00:23PM +0200, Lubomir Rintel wrote:
> The commit d790b7eda953 ("[media] vb2-dma-sg: move dma_(un)map_sg here")
> left dma_desc_nent unset. It previously contained the number of DMA
> descriptors as returned from dma_map_sg().
>
> We can now (since the commit referred to above) obtain the same value from
> the sg_table and drop dma_desc_nent altogether.
>
> Tested on OLPC XO-1.75 machine. Doesn't affect the OLPC XO-1's Cafe
> driver, since that one doesn't do DMA.
>
> Fixes: d790b7eda953df474f470169ebdf111c02fa7a2d
Could you use the proper 'fixes' format here?
Fixes: d790b7eda953 ("[media] vb2-dma-sg: move dma_(un)map_sg here")
> Signed-off-by: Lubomir Rintel <[email protected]>
> ---
> drivers/media/platform/marvell-ccic/mcam-core.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c
> b/drivers/media/platform/marvell-ccic/mcam-core.c
> index f1b301810260a..d97f39bde9bd6 100644
> --- a/drivers/media/platform/marvell-ccic/mcam-core.c
> +++ b/drivers/media/platform/marvell-ccic/mcam-core.c
> @@ -200,7 +200,6 @@ struct mcam_vb_buffer {
> struct list_head queue;
> struct mcam_dma_desc *dma_desc; /* Descriptor virtual address */
> dma_addr_t dma_desc_pa; /* Descriptor physical address */
> - int dma_desc_nent; /* Number of mapped descriptors */
> };
>
> static inline struct mcam_vb_buffer *vb_to_mvb(struct vb2_v4l2_buffer *vb)
> @@ -608,9 +607,11 @@ static void mcam_dma_contig_done(struct mcam_camera
> *cam, int frame)
> static void mcam_sg_next_buffer(struct mcam_camera *cam)
> {
> struct mcam_vb_buffer *buf;
> + struct sg_table *sg_table;
>
> buf = list_first_entry(&cam->buffers, struct mcam_vb_buffer, queue);
> list_del_init(&buf->queue);
> + sg_table = vb2_dma_sg_plane_desc(&buf->vb_buf.vb2_buf, 0);
> /*
> * Very Bad Not Good Things happen if you don't clear
> * C1_DESC_ENA before making any descriptor changes.
> @@ -618,7 +619,7 @@ static void mcam_sg_next_buffer(struct mcam_camera *cam)
> mcam_reg_clear_bit(cam, REG_CTRL1, C1_DESC_ENA);
> mcam_reg_write(cam, REG_DMA_DESC_Y, buf->dma_desc_pa);
> mcam_reg_write(cam, REG_DESC_LEN_Y,
> - buf->dma_desc_nent*sizeof(struct mcam_dma_desc));
> + sg_table->nents*sizeof(struct mcam_dma_desc));
Space betwen operators (it was there already, I know).
Apart for that, patch seems fine to me:
Reviewed-by: Jacopo Mondi <[email protected]>
Thanks
j
> mcam_reg_write(cam, REG_DESC_LEN_U, 0);
> mcam_reg_write(cam, REG_DESC_LEN_V, 0);
> mcam_reg_set_bit(cam, REG_CTRL1, C1_DESC_ENA);
> --
> 2.21.0
>
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