[PATCH 2/2] media: imx7-media-csi: add i.MX6UL support

Sébastien Szymanski
2019-04-30T08:06:07Z

i.MX7 and i.MX6UL/L have the same CSI controller. So add i.MX6UL/L support
to imx7-media-csi driver.

Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
---
This patch needs the following patch from Rui Miguel Silva:
https://patchwork.linuxtv.org/patch/55657/

I have tested this patch with a OV5640 sensor (8-bit parallel). The pipeline is:

Device topology
- entity 1: csi (2 pads, 2 links)
type V4L2 subdev subtype Unknown flags 0
device node name /dev/v4l-subdev0
pad0: Sink
[fmt:UYVY8_2X8/640x480 field:none colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
<- "ov5640 1-003c":0 [ENABLED]
pad1: Source
[fmt:UYVY8_2X8/640x480 field:none colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
-> "csi capture":0 [ENABLED]

- entity 4: csi capture (1 pad, 1 link)
type Node subtype V4L flags 0
device node name /dev/video0
pad0: Sink
<- "csi":1 [ENABLED]

- entity 10: ov5640 1-003c (1 pad, 1 link)
type V4L2 subdev subtype Sensor flags 0
device node name /dev/v4l-subdev1
pad0: Source
[fmt:UYVY8_2X8/640x480@1/30 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
-> "csi":0 [ENABLED]

drivers/staging/media/imx/imx7-media-csi.c | 61 ++++++++++++++++------
1 file changed, 46 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
index a708a0340eb1..ef4534a96fa0 100644
--- a/drivers/staging/media/imx/imx7-media-csi.c
+++ b/drivers/staging/media/imx/imx7-media-csi.c
@@ -154,6 +154,11 @@

static const char * const imx7_csi_clk_id[] = {"axi", "dcic", "mclk"};

+enum csi_type {
+ IMX7,
+ IMX6UL
+};
+
struct imx7_csi {
struct device *dev;
struct v4l2_subdev sd;
@@ -195,6 +200,7 @@ struct imx7_csi {
bool is_init;
bool is_streaming;
bool is_csi2;
+ enum csi_type type;

struct completion last_eof_completion;
};
@@ -554,6 +560,14 @@ static int imx7_csi_pad_link_validate(struct v4l2_subdev *sd,
if (ret)
return ret;

+ if (csi->type == IMX6UL) {
+ mutex_lock(&csi->lock);
+ csi->is_csi2 = false;
+ mutex_unlock(&csi->lock);
+
+ return 0;
+ }
+
ret = imx7_csi_get_upstream_endpoint(csi, &upstream_ep, true);
if (ret) {
v4l2_err(&csi->sd, "failed to find upstream endpoint\n");
@@ -763,6 +777,7 @@ static int imx7_csi_configure(struct imx7_csi *csi)
struct v4l2_pix_format *out_pix = &vdev->fmt.fmt.pix;
__u32 in_code = csi->format_mbus[IMX7_CSI_PAD_SINK].code;
u32 cr1, cr18;
+ int width = out_pix->width;

if (out_pix->field == V4L2_FIELD_INTERLACED) {
imx7_csi_deinterlace_enable(csi, true);
@@ -772,15 +787,27 @@ static int imx7_csi_configure(struct imx7_csi *csi)
imx7_csi_buf_stride_set(csi, 0);
}

- imx7_csi_set_imagpara(csi, out_pix->width, out_pix->height);
+ cr18 = imx7_csi_reg_read(csi, CSI_CSICR18);
+
+ if (!csi->is_csi2) {
+ if (out_pix->pixelformat == V4L2_PIX_FMT_UYVY ||
+ out_pix->pixelformat == V4L2_PIX_FMT_YUYV)
+ width *= 2;
+
+ imx7_csi_set_imagpara(csi, width, out_pix->height);
+
+ cr18 |= (BIT_BASEADDR_SWITCH_EN | BIT_BASEADDR_SWITCH_SEL |
+ BIT_BASEADDR_CHG_ERR_EN);
+ imx7_csi_reg_write(csi, cr18, CSI_CSICR18);

- if (!csi->is_csi2)
return 0;
+ }
+
+ imx7_csi_set_imagpara(csi, width, out_pix->height);

cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
cr1 &= ~BIT_GCLK_MODE;

- cr18 = imx7_csi_reg_read(csi, CSI_CSICR18);
cr18 &= BIT_MIPI_DATA_FORMAT_MASK;
cr18 |= BIT_DATA_FROM_MIPI;

@@ -815,12 +842,9 @@ static int imx7_csi_enable(struct imx7_csi *csi)
{
imx7_csi_sw_reset(csi);

- if (csi->is_csi2) {
- imx7_csi_dmareq_rff_enable(csi);
- imx7_csi_hw_enable_irq(csi);
- imx7_csi_hw_enable(csi);
- return 0;
- }
+ imx7_csi_dmareq_rff_enable(csi);
+ imx7_csi_hw_enable_irq(csi);
+ imx7_csi_hw_enable(csi);

return 0;
}
@@ -1218,20 +1242,33 @@ static int imx7_csi_clocks_get(struct imx7_csi *csi)
return devm_clk_bulk_get(dev, csi->num_clks, csi->clks);
}

+static const struct of_device_id imx7_csi_of_match[] = {
+ { .compatible = "fsl,imx7-csi", .data = (void *)IMX7 },
+ { .compatible = "fsl,imx6ul-csi", .data = (void *)IMX6UL },
+ { },
+};
+MODULE_DEVICE_TABLE(of, imx7_csi_of_match);
+
static int imx7_csi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct imx_media_dev *imxmd;
struct imx7_csi *csi;
+ const struct of_device_id *of_id;
struct resource *res;
int ret;

+ of_id = of_match_node(imx7_csi_of_match, node);
+ if (!of_id)
+ return -ENODEV;
+
csi = devm_kzalloc(&pdev->dev, sizeof(*csi), GFP_KERNEL);
if (!csi)
return -ENOMEM;

csi->dev = dev;
+ csi->type = (enum csi_type)of_id->data;

ret = imx7_csi_clocks_get(csi);
if (ret < 0) {
@@ -1349,12 +1386,6 @@ static int imx7_csi_remove(struct platform_device *pdev)
return 0;
}

-static const struct of_device_id imx7_csi_of_match[] = {
- { .compatible = "fsl,imx7-csi" },
- { },
-};
-MODULE_DEVICE_TABLE(of, imx7_csi_of_match);
-
static struct platform_driver imx7_csi_driver = {
.probe = imx7_csi_probe,
.remove = imx7_csi_remove,
--
2.19.2