[PATCH v5 07/10] media: rkisp1: Configure gasket on i.MX8MP

Paul Elder
2024-01-06T16:04:04Z

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

The i.MX8MP has a gasket between the CSI-2 receiver and the ISP.
Configure and enable it when starting the ISP, and disable it when
stopping.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Tested-by: Adam Ford <aford173@gmail.com>
---
.../platform/rockchip/rkisp1/rkisp1-common.h | 5 +
.../platform/rockchip/rkisp1/rkisp1-dev.c | 16 +++
.../platform/rockchip/rkisp1/rkisp1-isp.c | 131 +++++++++++++++++-
3 files changed, 149 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
index 219d4a2547aa..69940014d597 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
@@ -24,6 +24,7 @@
#include "rkisp1-regs.h"

struct dentry;
+struct regmap;

/*
* flags on the 'direction' field in struct rkisp1_mbus_info' that indicate
@@ -444,6 +445,8 @@ struct rkisp1_debug {
* @dev: a pointer to the struct device
* @clk_size: number of clocks
* @clks: array of clocks
+ * @gasket: the gasket - i.MX8MP only
+ * @gasket_id: the gasket ID (0 or 1) - i.MX8MP only
* @v4l2_dev: v4l2_device variable
* @media_dev: media_device variable
* @notifier: a notifier to register on the v4l2-async API to be notified on the sensor
@@ -466,6 +469,8 @@ struct rkisp1_device {
struct device *dev;
unsigned int clk_size;
struct clk_bulk_data clks[RKISP1_MAX_BUS_CLK];
+ struct regmap *gasket;
+ unsigned int gasket_id;
struct v4l2_device v4l2_dev;
struct media_device media_dev;
struct v4l2_async_notifier notifier;
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
index 29a8249852d4..01f811b9f9a5 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -10,6 +10,7 @@

#include <linux/clk.h>
#include <linux/interrupt.h>
+#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
@@ -624,6 +625,21 @@ static int rkisp1_probe(struct platform_device *pdev)
return ret;
rkisp1->clk_size = info->clk_size;

+ if (info->isp_ver == IMX8MP_V10) {
+ unsigned int id;
+
+ rkisp1->gasket = syscon_regmap_lookup_by_phandle_args(dev->of_node,
+ "fsl,blk-ctrl",
+ 1, &id);
+ if (IS_ERR(rkisp1->gasket)) {
+ ret = PTR_ERR(rkisp1->gasket);
+ dev_err(dev, "failed to get gasket: %d\n", ret);
+ return ret;
+ }
+
+ rkisp1->gasket_id = id;
+ }
+
pm_runtime_enable(&pdev->dev);

ret = pm_runtime_resume_and_get(&pdev->dev);
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
index 78a1f7a1499b..bfd6dc3559cc 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
@@ -10,6 +10,7 @@

#include <linux/iopoll.h>
#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
#include <linux/videodev2.h>
#include <linux/vmalloc.h>

@@ -53,6 +54,115 @@
* +---------------------------------------------------------+
*/

+/* -----------------------------------------------------------------------------
+ * Media block control (i.MX8MP only)
+ */
+
+#define ISP_DEWARP_CONTROL 0x0138
+
+#define ISP_DEWARP_CONTROL_MIPI_CSI2_HS_POLARITY BIT(22)
+#define ISP_DEWARP_CONTROL_MIPI_CSI2_VS_SEL_RISING (0 << 20)
+#define ISP_DEWARP_CONTROL_MIPI_CSI2_VS_SEL_NEGATIVE (1 << 20)
+#define ISP_DEWARP_CONTROL_MIPI_CSI2_VS_SEL_POSITIVE (2 << 20)
+#define ISP_DEWARP_CONTROL_MIPI_CSI2_VS_SEL_FALLING (3 << 20)
+#define ISP_DEWARP_CONTROL_MIPI_CSI2_VS_SEL_MASK GENMASK(21, 20)
+#define ISP_DEWARP_CONTROL_MIPI_ISP2_LEFT_JUST_MODE BIT(19)
+#define ISP_DEWARP_CONTROL_MIPI_ISP2_DATA_TYPE(dt) ((dt) << 13)
+#define ISP_DEWARP_CONTROL_MIPI_ISP2_DATA_TYPE_MASK GENMASK(18, 13)
+
+#define ISP_DEWARP_CONTROL_MIPI_CSI1_HS_POLARITY BIT(12)
+#define ISP_DEWARP_CONTROL_MIPI_CSI1_VS_SEL_RISING (0 << 10)
+#define ISP_DEWARP_CONTROL_MIPI_CSI1_VS_SEL_NEGATIVE (1 << 10)
+#define ISP_DEWARP_CONTROL_MIPI_CSI1_VS_SEL_POSITIVE (2 << 10)
+#define ISP_DEWARP_CONTROL_MIPI_CSI1_VS_SEL_FALLING (3 << 10)
+#define ISP_DEWARP_CONTROL_MIPI_CSI1_VS_SEL_MASK GENMASK(11, 10)
+#define ISP_DEWARP_CONTROL_MIPI_ISP1_LEFT_JUST_MODE BIT(9)
+#define ISP_DEWARP_CONTROL_MIPI_ISP1_DATA_TYPE(dt) ((dt) << 3)
+#define ISP_DEWARP_CONTROL_MIPI_ISP1_DATA_TYPE_MASK GENMASK(8, 3)
+
+#define ISP_DEWARP_CONTROL_GPR_ISP_1_DISABLE BIT(1)
+#define ISP_DEWARP_CONTROL_GPR_ISP_0_DISABLE BIT(0)
+
+static int rkisp1_gasket_enable(struct rkisp1_device *rkisp1,
+ struct media_pad *source)
+{
+ struct v4l2_subdev *source_sd;
+ struct v4l2_mbus_frame_desc fd;
+ unsigned int dt;
+ u32 mask;
+ u32 val;
+ int ret;
+
+ /*
+ * Configure and enable the gasket with the CSI-2 data type. Set the
+ * vsync polarity as active high, as that is what the ISP is configured
+ * to expect in ISP_ACQ_PROP. Enable left justification, as the i.MX8MP
+ * ISP has a 16-bit wide input and expects data to be left-aligned.
+ */
+
+ source_sd = media_entity_to_v4l2_subdev(source->entity);
+ ret = v4l2_subdev_call(source_sd, pad, get_frame_desc,
+ source->index, &fd);
+ if (ret) {
+ dev_err(rkisp1->dev,
+ "failed to get frame descriptor from '%s':%u: %d\n",
+ source_sd->name, 0, ret);
+ return ret;
+ }
+
+ if (fd.num_entries != 1) {
+ dev_err(rkisp1->dev, "invalid frame descriptor for '%s':%u\n",
+ source_sd->name, 0);
+ return -EINVAL;
+ }
+
+ dt = fd.entry[0].bus.csi2.dt;
+
+ if (rkisp1->gasket_id == 0) {
+ mask = ISP_DEWARP_CONTROL_MIPI_CSI1_HS_POLARITY
+ | ISP_DEWARP_CONTROL_MIPI_CSI1_VS_SEL_MASK
+ | ISP_DEWARP_CONTROL_MIPI_ISP1_LEFT_JUST_MODE
+ | ISP_DEWARP_CONTROL_MIPI_ISP1_DATA_TYPE_MASK
+ | ISP_DEWARP_CONTROL_GPR_ISP_0_DISABLE;
+ val = ISP_DEWARP_CONTROL_MIPI_CSI1_VS_SEL_POSITIVE
+ | ISP_DEWARP_CONTROL_MIPI_ISP1_LEFT_JUST_MODE
+ | ISP_DEWARP_CONTROL_MIPI_ISP1_DATA_TYPE(dt);
+ } else {
+ mask = ISP_DEWARP_CONTROL_MIPI_CSI2_HS_POLARITY
+ | ISP_DEWARP_CONTROL_MIPI_CSI2_VS_SEL_MASK
+ | ISP_DEWARP_CONTROL_MIPI_ISP2_LEFT_JUST_MODE
+ | ISP_DEWARP_CONTROL_MIPI_ISP2_DATA_TYPE_MASK
+ | ISP_DEWARP_CONTROL_GPR_ISP_1_DISABLE;
+ val = ISP_DEWARP_CONTROL_MIPI_CSI2_VS_SEL_POSITIVE
+ | ISP_DEWARP_CONTROL_MIPI_ISP2_LEFT_JUST_MODE
+ | ISP_DEWARP_CONTROL_MIPI_ISP2_DATA_TYPE(dt);
+ }
+
+ regmap_update_bits(rkisp1->gasket, ISP_DEWARP_CONTROL, mask, val);
+
+ return 0;
+}
+
+static void rkisp1_gasket_disable(struct rkisp1_device *rkisp1)
+{
+ u32 mask;
+ u32 val;
+
+ if (rkisp1->gasket_id == 1) {
+ mask = ISP_DEWARP_CONTROL_MIPI_ISP2_LEFT_JUST_MODE
+ | ISP_DEWARP_CONTROL_MIPI_ISP2_DATA_TYPE_MASK
+ | ISP_DEWARP_CONTROL_GPR_ISP_1_DISABLE;
+ val = ISP_DEWARP_CONTROL_GPR_ISP_1_DISABLE;
+ } else {
+ mask = ISP_DEWARP_CONTROL_MIPI_ISP1_LEFT_JUST_MODE
+ | ISP_DEWARP_CONTROL_MIPI_ISP1_DATA_TYPE_MASK
+ | ISP_DEWARP_CONTROL_GPR_ISP_0_DISABLE;
+ val = ISP_DEWARP_CONTROL_GPR_ISP_0_DISABLE;
+ }
+
+ regmap_update_bits(rkisp1->gasket, ISP_DEWARP_CONTROL, mask, val);
+}
+
/* ----------------------------------------------------------------------------
* Camera Interface registers configurations
*/
@@ -291,6 +401,9 @@ static void rkisp1_isp_stop(struct rkisp1_isp *isp)
RKISP1_CIF_VI_IRCL_MIPI_SW_RST |
RKISP1_CIF_VI_IRCL_ISP_SW_RST);
rkisp1_write(rkisp1, RKISP1_CIF_VI_IRCL, 0x0);
+
+ if (rkisp1->info->isp_ver == IMX8MP_V10)
+ rkisp1_gasket_disable(rkisp1);
}

static void rkisp1_config_clk(struct rkisp1_isp *isp)
@@ -315,16 +428,24 @@ static void rkisp1_config_clk(struct rkisp1_isp *isp)
}
}

-static void rkisp1_isp_start(struct rkisp1_isp *isp,
- struct v4l2_subdev_state *sd_state)
+static int rkisp1_isp_start(struct rkisp1_isp *isp,
+ struct v4l2_subdev_state *sd_state,
+ struct media_pad *source)
{
struct rkisp1_device *rkisp1 = isp->rkisp1;
const struct v4l2_mbus_framefmt *src_fmt;
const struct rkisp1_mbus_info *src_info;
u32 val;
+ int ret;

rkisp1_config_clk(isp);

+ if (rkisp1->info->isp_ver == IMX8MP_V10) {
+ ret = rkisp1_gasket_enable(rkisp1, source);
+ if (ret)
+ return ret;
+ }
+
/* Activate ISP */
val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_CTRL);
val |= RKISP1_CIF_ISP_CTRL_ISP_CFG_UPD |
@@ -338,6 +459,8 @@ static void rkisp1_isp_start(struct rkisp1_isp *isp,

if (src_info->pixel_enc != V4L2_PIXEL_ENC_BAYER)
rkisp1_params_post_configure(&rkisp1->params);
+
+ return 0;
}

/* ----------------------------------------------------------------------------
@@ -848,7 +971,9 @@ static int rkisp1_isp_s_stream(struct v4l2_subdev *sd, int enable)
if (ret)
goto out_unlock;

- rkisp1_isp_start(isp, sd_state);
+ ret = rkisp1_isp_start(isp, sd_state, source_pad);
+ if (ret)
+ goto out_unlock;

ret = v4l2_subdev_call(rkisp1->source, video, s_stream, true);
if (ret) {