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Subject[PATCH v2 2/3] media: imx7-media-csi: add i.MX6UL support
Date
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>
---

Changes for v2:
- rebase on top of linuxtv/master
- mention i.MX6UL/L in header and Kconfig help text
- rename csi_type to csi_soc_id

drivers/staging/media/imx/Kconfig | 4 +-
drivers/staging/media/imx/imx7-media-csi.c | 62 ++++++++++++++++------
2 files changed, 49 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/media/imx/Kconfig b/drivers/staging/media/imx/Kconfig
index ad3d7df6bb3c..8b6dc42c39e0 100644
--- a/drivers/staging/media/imx/Kconfig
+++ b/drivers/staging/media/imx/Kconfig
@@ -22,11 +22,11 @@ config VIDEO_IMX_CSI
A video4linux camera sensor interface driver for i.MX5/6.

config VIDEO_IMX7_CSI
- tristate "i.MX7 Camera Sensor Interface driver"
+ tristate "i.MX6UL/L / i.MX7 Camera Sensor Interface driver"
depends on VIDEO_IMX_MEDIA && VIDEO_DEV && I2C
default y
help
Enable support for video4linux camera sensor interface driver for
- i.MX7.
+ i.MX6UL/L or i.MX7.
endmenu
endif
diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
index 9101566f3f67..902bdce594cf 100644
--- a/drivers/staging/media/imx/imx7-media-csi.c
+++ b/drivers/staging/media/imx/imx7-media-csi.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * V4L2 Capture CSI Subdev for Freescale i.MX7 SOC
+ * V4L2 Capture CSI Subdev for Freescale i.MX6UL/L / i.MX7 SOC
*
* Copyright (c) 2019 Linaro Ltd
*
@@ -152,6 +152,11 @@
#define CSI_CSICR18 0x48
#define CSI_CSICR19 0x4c

+enum csi_soc_id {
+ IMX7,
+ IMX6UL
+};
+
struct imx7_csi {
struct device *dev;
struct v4l2_subdev sd;
@@ -191,6 +196,7 @@ struct imx7_csi {
bool is_init;
bool is_streaming;
bool is_csi2;
+ enum csi_soc_id soc_id;

struct completion last_eof_completion;
};
@@ -548,6 +554,14 @@ static int imx7_csi_pad_link_validate(struct v4l2_subdev *sd,
if (ret)
return ret;

+ if (csi->soc_id == 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");
@@ -757,6 +771,7 @@ 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);
@@ -766,15 +781,27 @@ 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;

@@ -809,11 +836,9 @@ static void 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);
- }
+ imx7_csi_dmareq_rff_enable(csi);
+ imx7_csi_hw_enable_irq(csi);
+ imx7_csi_hw_enable(csi);
}

static void imx7_csi_disable(struct imx7_csi *csi)
@@ -1166,19 +1191,32 @@ static int imx7_csi_parse_endpoint(struct device *dev,
return fwnode_device_is_available(asd->match.fwnode) ? 0 : -EINVAL;
}

+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;
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->soc_id = (enum csi_soc_id)of_id->data;

csi->mclk = devm_clk_get(&pdev->dev, "mclk");
if (IS_ERR(csi->mclk)) {
@@ -1294,12 +1332,6 @@ 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
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