Hi Paul,
Thank you for the patch.
On Wed, Jun 15, 2022 at 04:11:25AM +0900, Paul Elder wrote:
> On the ISP that is integrated in the i.MX8MP, the DMA base addresses are
> encoded in 34-bit. Shift them to the left by 2 bits so that they can be
I think you meant right, not left.
> contained in 32 bits.
The important part here is that this is how the address is encoded in
the hardware. I suppose it's obvious, otherwise it woudln't work at all,
but maybe it could be explained more explicitly ?
On the ISP that is integrated in the i.MX8MP, DMA addresses have been
extended to 34 bits, with the 32 MSBs stored in the DMA address
registers and the 2 LSBs set to 0. Shift the buffer addresses right by 2
on that platform.
> Signed-off-by: Paul Elder <paul.elder@xxxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> .../platform/rockchip/rkisp1/rkisp1-capture.c | 19 +++++++++++--------
> .../platform/rockchip/rkisp1/rkisp1-common.h | 1 +
> .../platform/rockchip/rkisp1/rkisp1-dev.c | 3 ++-
> 3 files changed, 14 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> index 35cec263c563..234b1f8488cb 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> @@ -624,6 +624,9 @@ static void rkisp1_dummy_buf_destroy(struct rkisp1_capture *cap)
>
> static void rkisp1_set_next_buf(struct rkisp1_capture *cap)
> {
> + u8 shift = cap->rkisp1->info->features & RKISP1_FEATURE_DMA_34BIT ?
> + 2 : 0;
> +
> cap->buf.curr = cap->buf.next;
> cap->buf.next = NULL;
>
> @@ -636,7 +639,7 @@ static void rkisp1_set_next_buf(struct rkisp1_capture *cap)
> buff_addr = cap->buf.next->buff_addr;
>
> rkisp1_write(cap->rkisp1, cap->config->mi.y_base_ad_init,
> - buff_addr[RKISP1_PLANE_Y]);
> + buff_addr[RKISP1_PLANE_Y] >> shift);
> /*
> * In order to support grey format we capture
> * YUV422 planar format from the camera and
> @@ -645,17 +648,17 @@ static void rkisp1_set_next_buf(struct rkisp1_capture *cap)
> if (cap->pix.cfg->fourcc == V4L2_PIX_FMT_GREY) {
> rkisp1_write(cap->rkisp1,
> cap->config->mi.cb_base_ad_init,
> - cap->buf.dummy.dma_addr);
> + cap->buf.dummy.dma_addr >> shift);
> rkisp1_write(cap->rkisp1,
> cap->config->mi.cr_base_ad_init,
> - cap->buf.dummy.dma_addr);
> + cap->buf.dummy.dma_addr >> shift);
> } else {
> rkisp1_write(cap->rkisp1,
> cap->config->mi.cb_base_ad_init,
> - buff_addr[RKISP1_PLANE_CB]);
> + buff_addr[RKISP1_PLANE_CB] >> shift);
> rkisp1_write(cap->rkisp1,
> cap->config->mi.cr_base_ad_init,
> - buff_addr[RKISP1_PLANE_CR]);
> + buff_addr[RKISP1_PLANE_CR] >> shift);
> }
> } else {
> /*
> @@ -663,11 +666,11 @@ static void rkisp1_set_next_buf(struct rkisp1_capture *cap)
> * throw data if there is no available buffer.
> */
> rkisp1_write(cap->rkisp1, cap->config->mi.y_base_ad_init,
> - cap->buf.dummy.dma_addr);
> + cap->buf.dummy.dma_addr >> shift);
> rkisp1_write(cap->rkisp1, cap->config->mi.cb_base_ad_init,
> - cap->buf.dummy.dma_addr);
> + cap->buf.dummy.dma_addr >> shift);
> rkisp1_write(cap->rkisp1, cap->config->mi.cr_base_ad_init,
> - cap->buf.dummy.dma_addr);
> + cap->buf.dummy.dma_addr >> shift);
> }
>
> /* Set plane offsets */
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> index 96657e55a5b0..0b834579d08c 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> @@ -113,6 +113,7 @@ enum rkisp1_feature {
> RKISP1_FEATURE_DUAL_CROP = BIT(1),
> RKISP1_FEATURE_RSZ_CROP = BIT(2),
> RKISP1_FEATURE_MAIN_STRIDE = BIT(3),
> + RKISP1_FEATURE_DMA_34BIT = BIT(4),
> };
>
> /*
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> index d68a805e8b6b..4c77aa2bc50a 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> @@ -506,7 +506,8 @@ static const struct rkisp1_info imx8mp_isp_info = {
> .isr_size = ARRAY_SIZE(imx8mp_isp_isrs),
> .isp_ver = IMX8MP_V10,
> .features = RKISP1_FEATURE_RSZ_CROP
> - | RKISP1_FEATURE_MAIN_STRIDE,
> + | RKISP1_FEATURE_MAIN_STRIDE
> + | RKISP1_FEATURE_DMA_34BIT,
> };
>
> static const struct of_device_id rkisp1_of_match[] = {
--
Regards,
Laurent Pinchart
