diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/marvell-ccic/mcam-core.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/media/video/marvell-ccic/mcam-core.c b/drivers/media/video/marvell-ccic/mcam-core.c index 050724f8d3e6..e46a72af63c4 100644 --- a/drivers/media/video/marvell-ccic/mcam-core.c +++ b/drivers/media/video/marvell-ccic/mcam-core.c @@ -509,11 +509,17 @@ static void mcam_sg_next_buffer(struct mcam_camera *cam) buf = list_first_entry(&cam->buffers, struct mcam_vb_buffer, queue); list_del_init(&buf->queue); + /* + * Very Bad Not Good Things happen if you don't clear + * C1_DESC_ENA before making any descriptor changes. + */ + 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)); 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); cam->vb_bufs[0] = buf; } @@ -533,7 +539,6 @@ static void mcam_ctlr_dma_sg(struct mcam_camera *cam) mcam_reg_clear_bit(cam, REG_CTRL1, C1_DESC_3WORD); mcam_sg_next_buffer(cam); - mcam_reg_set_bit(cam, REG_CTRL1, C1_DESC_ENA); cam->nbufs = 3; } @@ -561,17 +566,11 @@ static void mcam_dma_sg_done(struct mcam_camera *cam, int frame) if (cam->state != S_STREAMING) return; /* - * Very Bad Not Good Things happen if you don't clear - * C1_DESC_ENA before making any descriptor changes. - */ - mcam_reg_clear_bit(cam, REG_CTRL1, C1_DESC_ENA); - /* * If we have another buffer available, put it in and * restart the engine. */ if (!list_empty(&cam->buffers)) { mcam_sg_next_buffer(cam); - mcam_reg_set_bit(cam, REG_CTRL1, C1_DESC_ENA); mcam_ctlr_start(cam); /* * Otherwise set CF_SG_RESTART and the controller will |