[PATCH v6 08/11] media: rkisp1: Support i.MX8MP's 34-bit DMA
Paul Elder
paul.elder at ideasonboard.com
Thu Jan 11 03:48:28 PST 2024
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.
To support this:
- Shift the addresses to the right by 2 when writing to registers
- Set the dma mask to 34 bits
- Use dma_addr_t instead of u32 when storing the addresses
Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ideasonboard.com>
Tested-by: Alexander Stein <alexander.stein at ew.tq-group.com>
Tested-by: Adam Ford <aford173 at gmail.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen at ideasonboard.com>
---
Changes since v5:
- Improve the commit message
Changes since v4:
- Squash in fix from Tomi:
- https://gitlab.com/ideasonboard/nxp/linux/-/commit/d6477fe673b1c0d05d12ae21d8db9a03b07e7fea
Changes since v2:
- Document the RKISP1_FEATURE_DMA_34BIT bit
- Use the rkisp1_has_feature() macro
---
.../platform/rockchip/rkisp1/rkisp1-capture.c | 20 ++++++++++---------
.../platform/rockchip/rkisp1/rkisp1-common.h | 4 +++-
.../platform/rockchip/rkisp1/rkisp1-dev.c | 11 +++++++++-
3 files changed, 24 insertions(+), 11 deletions(-)
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
index ca95f62822fa..1ee7639c42b7 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
@@ -648,11 +648,13 @@ static void rkisp1_dummy_buf_destroy(struct rkisp1_capture *cap)
static void rkisp1_set_next_buf(struct rkisp1_capture *cap)
{
+ u8 shift = rkisp1_has_feature(cap->rkisp1, DMA_34BIT) ? 2 : 0;
+
cap->buf.curr = cap->buf.next;
cap->buf.next = NULL;
if (!list_empty(&cap->buf.queue)) {
- u32 *buff_addr;
+ dma_addr_t *buff_addr;
cap->buf.next = list_first_entry(&cap->buf.queue, struct rkisp1_buffer, queue);
list_del(&cap->buf.next->queue);
@@ -660,7 +662,7 @@ 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
@@ -669,17 +671,17 @@ 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 {
/*
@@ -687,11 +689,11 @@ 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 69940014d597..26573f6ae575 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
@@ -114,6 +114,7 @@ enum rkisp1_isp_pad {
* @RKISP1_FEATURE_MAIN_STRIDE: The ISP supports configurable stride on the main path
* @RKISP1_FEATURE_SELF_PATH: The ISP has a self path
* @RKISP1_FEATURE_DUAL_CROP: The ISP has the dual crop block at the resizer input
+ * @RKISP1_FEATURE_DMA_34BIT: The ISP uses 34-bit DMA addresses
*
* The ISP features are stored in a bitmask in &rkisp1_info.features and allow
* the driver to implement support for features present in some ISP versions
@@ -124,6 +125,7 @@ enum rkisp1_feature {
RKISP1_FEATURE_MAIN_STRIDE = BIT(1),
RKISP1_FEATURE_SELF_PATH = BIT(2),
RKISP1_FEATURE_DUAL_CROP = BIT(3),
+ RKISP1_FEATURE_DMA_34BIT = BIT(4),
};
#define rkisp1_has_feature(rkisp1, feature) \
@@ -239,7 +241,7 @@ struct rkisp1_vdev_node {
struct rkisp1_buffer {
struct vb2_v4l2_buffer vb;
struct list_head queue;
- u32 buff_addr[VIDEO_MAX_PLANES];
+ dma_addr_t buff_addr[VIDEO_MAX_PLANES];
};
/*
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
index 5a587391eacb..c2f1e533c8ff 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -549,7 +549,8 @@ static const struct rkisp1_info imx8mp_isp_info = {
.isrs = imx8mp_isp_isrs,
.isr_size = ARRAY_SIZE(imx8mp_isp_isrs),
.isp_ver = IMX8MP_V10,
- .features = RKISP1_FEATURE_MAIN_STRIDE,
+ .features = RKISP1_FEATURE_MAIN_STRIDE
+ | RKISP1_FEATURE_DMA_34BIT,
};
static const struct of_device_id rkisp1_of_match[] = {
@@ -575,6 +576,7 @@ static int rkisp1_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct rkisp1_device *rkisp1;
struct v4l2_device *v4l2_dev;
+ unsigned long long dma_mask;
unsigned int i;
int ret, irq;
u32 cif_id;
@@ -589,6 +591,13 @@ static int rkisp1_probe(struct platform_device *pdev)
dev_set_drvdata(dev, rkisp1);
rkisp1->dev = dev;
+ dma_mask = rkisp1_has_feature(rkisp1, DMA_34BIT) ? DMA_BIT_MASK(34) :
+ DMA_BIT_MASK(32);
+
+ ret = dma_set_mask_and_coherent(dev, dma_mask);
+ if (ret)
+ return ret;
+
mutex_init(&rkisp1->stream_lock);
rkisp1->base_addr = devm_platform_ioremap_resource(pdev, 0);
--
2.39.2
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