[PATCH v5 04/10] media: platform: Add C3 MIPI adapter driver

Keke Li via B4 Relay
2024-12-27T07:09:37Z

From: Keke Li <keke.li@amlogic.com>

Add a driver for the MIPI adapter unit found on the Amlogic C3 SoC.

This driver is used to align the MIPI data from the MIPI CSI-2 receiver
unit and send the aligned data to the ISP unit.

Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Keke Li <keke.li@amlogic.com>
---
MAINTAINERS | 1 +
drivers/media/platform/amlogic/c3/Kconfig | 1 +
drivers/media/platform/amlogic/c3/Makefile | 1 +
.../media/platform/amlogic/c3/mipi-adapter/Kconfig | 16 +
.../platform/amlogic/c3/mipi-adapter/Makefile | 3 +
.../amlogic/c3/mipi-adapter/c3-mipi-adap.c | 829 +++++++++++++++++++++
6 files changed, 851 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index af4239f2f3fc..2ef79d99e088 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1248,6 +1248,7 @@ M: Keke Li <keke.li@amlogic.com>
L: linux-media@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/media/amlogic,c3-mipi-adapter.yaml
+F: drivers/media/platform/amlogic/c3/mipi-adapter/

AMLOGIC MIPI CSI2 DRIVER
M: Keke Li <keke.li@amlogic.com>
diff --git a/drivers/media/platform/amlogic/c3/Kconfig b/drivers/media/platform/amlogic/c3/Kconfig
index 098d458747b8..a504a1eb22e6 100644
--- a/drivers/media/platform/amlogic/c3/Kconfig
+++ b/drivers/media/platform/amlogic/c3/Kconfig
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only

+source "drivers/media/platform/amlogic/c3/mipi-adapter/Kconfig"
source "drivers/media/platform/amlogic/c3/mipi-csi2/Kconfig"
diff --git a/drivers/media/platform/amlogic/c3/Makefile b/drivers/media/platform/amlogic/c3/Makefile
index a468fb782f94..770b2a2903ad 100644
--- a/drivers/media/platform/amlogic/c3/Makefile
+++ b/drivers/media/platform/amlogic/c3/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only

+obj-y += mipi-adapter/
obj-y += mipi-csi2/
diff --git a/drivers/media/platform/amlogic/c3/mipi-adapter/Kconfig b/drivers/media/platform/amlogic/c3/mipi-adapter/Kconfig
new file mode 100644
index 000000000000..bf19059b3543
--- /dev/null
+++ b/drivers/media/platform/amlogic/c3/mipi-adapter/Kconfig
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config VIDEO_C3_MIPI_ADAPTER
+ tristate "Amlogic C3 MIPI adapter"
+ depends on ARCH_MESON || COMPILE_TEST
+ depends on VIDEO_DEV
+ depends on OF
+ select MEDIA_CONTROLLER
+ select V4L2_FWNODE
+ select VIDEO_V4L2_SUBDEV_API
+ help
+ Video4Linux2 driver for Amlogic C3 MIPI adapter.
+ C3 MIPI adapter mainly responsible for organizing
+ MIPI data and sending raw data to ISP pipeline.
+
+ To compile this driver as a module choose m here.
diff --git a/drivers/media/platform/amlogic/c3/mipi-adapter/Makefile b/drivers/media/platform/amlogic/c3/mipi-adapter/Makefile
new file mode 100644
index 000000000000..216fc310c5b4
--- /dev/null
+++ b/drivers/media/platform/amlogic/c3/mipi-adapter/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_VIDEO_C3_MIPI_ADAPTER) += c3-mipi-adap.o
diff --git a/drivers/media/platform/amlogic/c3/mipi-adapter/c3-mipi-adap.c b/drivers/media/platform/amlogic/c3/mipi-adapter/c3-mipi-adap.c
new file mode 100644
index 000000000000..4ae6e2e76138
--- /dev/null
+++ b/drivers/media/platform/amlogic/c3/mipi-adapter/c3-mipi-adap.c
@@ -0,0 +1,829 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
+/*
+ * Copyright (C) 2024 Amlogic, Inc. All rights reserved
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <media/mipi-csi2.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-mc.h>
+#include <media/v4l2-subdev.h>
+
+/*
+ * Adapter Block Diagram
+ * ---------------------
+ *
+ * +--------------------------------------------+
+ * | Adapter |
+ * |--------------------------------------------|
+ * +------------+ | | | | | +-----+
+ * | MIPI CSI-2 |--->| Frontend -> DDR_RD0 -> PIXEL0 -> ALIGNMENT |--->| ISP |
+ * +------------+ | | | | | +-----+
+ * +--------------------------------------------+
+ *
+ */
+
+/* C3 adapter submodule definition */
+enum {
+ SUBMD_TOP,
+ SUBMD_FD,
+ SUBMD_RD,
+};
+
+#define ADAP_SUBMD_MASK GENMASK(17, 16)
+#define ADAP_SUBMD_SHIFT 16
+#define ADAP_SUBMD(x) (((x) & (ADAP_SUBMD_MASK)) >> (ADAP_SUBMD_SHIFT))
+#define ADAP_REG_ADDR_MASK GENMASK(15, 0)
+#define ADAP_REG_ADDR(x) ((x) & (ADAP_REG_ADDR_MASK))
+#define ADAP_REG_T(x) ((SUBMD_TOP << ADAP_SUBMD_SHIFT) | (x))
+#define ADAP_REG_F(x) ((SUBMD_FD << ADAP_SUBMD_SHIFT) | (x))
+#define ADAP_REG_R(x) ((SUBMD_RD << ADAP_SUBMD_SHIFT) | (x))
+
+#define MIPI_ADAP_CLOCK_NUM_MAX 3
+#define MIPI_ADAP_SUBDEV_NAME "c3-mipi-adapter"
+
+/* C3 MIPI adapter TOP register */
+#define MIPI_ADAPT_DE_CTRL0 ADAP_REG_T(0x40)
+#define MIPI_ADAPT_DE_CTRL0_RD_BUS_BYPASS_MASK BIT(3)
+#define MIPI_ADAPT_DE_CTRL0_RD_BUS_BYPASS_EN BIT(3)
+#define MIPI_ADAPT_DE_CTRL0_RD_BUS_BYPASS_DIS (0 << 3)
+#define MIPI_ADAPT_DE_CTRL0_WR_BUS_BYPASS_MASK BIT(7)
+#define MIPI_ADAPT_DE_CTRL0_WR_BUS_BYPASS_EN BIT(7)
+#define MIPI_ADAPT_DE_CTRL0_WR_BUS_BYPASS_DIS (0 << 7)
+
+/* C3 MIPI adapter FRONTEND register */
+#define CSI2_CLK_RESET ADAP_REG_F(0x00)
+#define CSI2_CLK_RESET_SW_RESET_MASK BIT(0)
+#define CSI2_CLK_RESET_SW_RESET_APPLY BIT(0)
+#define CSI2_CLK_RESET_SW_RESET_RELEASE (0 << 0)
+#define CSI2_CLK_RESET_CLK_ENABLE_MASK BIT(1)
+#define CSI2_CLK_RESET_CLK_ENABLE_EN BIT(1)
+#define CSI2_CLK_RESET_CLK_ENABLE_DIS (0 << 1)
+
+#define CSI2_GEN_CTRL0 ADAP_REG_F(0x04)
+#define CSI2_GEN_CTRL0_VC0_MASK BIT(0)
+#define CSI2_GEN_CTRL0_VC0_EN BIT(0)
+#define CSI2_GEN_CTRL0_VC0_DIS (0 << 0)
+#define CSI2_GEN_CTRL0_ENABLE_PACKETS_MASK GENMASK(20, 16)
+#define CSI2_GEN_CTRL0_ENABLE_PACKETS_RAW BIT(16)
+#define CSI2_GEN_CTRL0_ENABLE_PACKETS_YUV (2 << 16)
+
+#define CSI2_X_START_END_ISP ADAP_REG_F(0x0c)
+#define CSI2_X_START_END_ISP_X_START_MASK GENMASK(15, 0)
+#define CSI2_X_START_END_ISP_X_START(x) ((x) << 0)
+#define CSI2_X_START_END_ISP_X_END_MASK GENMASK(31, 16)
+#define CSI2_X_START_END_ISP_X_END(x) (((x) - 1) << 16)
+
+#define CSI2_Y_START_END_ISP ADAP_REG_F(0x10)
+#define CSI2_Y_START_END_ISP_Y_START_MASK GENMASK(15, 0)
+#define CSI2_Y_START_END_ISP_Y_START(x) ((x) << 0)
+#define CSI2_Y_START_END_ISP_Y_END_MASK GENMASK(31, 16)
+#define CSI2_Y_START_END_ISP_Y_END(x) (((x) - 1) << 16)
+
+#define CSI2_VC_MODE ADAP_REG_F(0x1c)
+#define CSI2_VC_MODE_VS_ISP_SEL_VC_MASK GENMASK(19, 16)
+#define CSI2_VC_MODE_VS_ISP_SEL_VC_0 BIT(16)
+#define CSI2_VC_MODE_VS_ISP_SEL_VC_1 (2 << 16)
+#define CSI2_VC_MODE_VS_ISP_SEL_VC_2 (4 << 16)
+#define CSI2_VC_MODE_VS_ISP_SEL_VC_3 (8 << 16)
+#define CSI2_VC_MODE_HS_ISP_SEL_VC_MASK GENMASK(23, 20)
+#define CSI2_VC_MODE_HS_ISP_SEL_VC_0 BIT(20)
+#define CSI2_VC_MODE_HS_ISP_SEL_VC_1 (2 << 20)
+#define CSI2_VC_MODE_HS_ISP_SEL_VC_2 (4 << 20)
+#define CSI2_VC_MODE_HS_ISP_SEL_VC_3 (8 << 20)
+
+/* C3 MIPI adapter READER register */
+#define MIPI_ADAPT_DDR_RD0_CNTL0 ADAP_REG_R(0x00)
+#define MIPI_ADAPT_DDR_RD0_CNTL0_MODULE_EN_MASK BIT(0)
+#define MIPI_ADAPT_DDR_RD0_CNTL0_MODULE_EN BIT(0)
+#define MIPI_ADAPT_DDR_RD0_CNTL0_MODULE_DIS (0 << 0)
+
+#define MIPI_ADAPT_DDR_RD0_CNTL1 ADAP_REG_R(0x04)
+#define MIPI_ADAPT_DDR_RD0_CNTL1_PORT_SEL_MASK GENMASK(31, 30)
+#define MIPI_ADAPT_DDR_RD0_CNTL1_PORT_SEL_DIRECT_MODE (0 << 30)
+#define MIPI_ADAPT_DDR_RD0_CNTL1_PORT_SEL_DDR_MODE BIT(30)
+
+#define MIPI_ADAPT_PIXEL0_CNTL0 ADAP_REG_R(0x80)
+#define MIPI_ADAPT_PIXEL0_CNTL0_WORK_MODE_MASK GENMASK(17, 16)
+#define MIPI_ADAPT_PIXEL0_CNTL0_WORK_MODE_RAW_DDR (0 << 16)
+#define MIPI_ADAPT_PIXEL0_CNTL0_WORK_MODE_RAW_DIRECT BIT(16)
+#define MIPI_ADAPT_PIXEL0_CNTL0_DATA_TYPE_MASK GENMASK(25, 20)
+#define MIPI_ADAPT_PIXEL0_CNTL0_DATA_TYPE(x) ((x) << 20)
+#define MIPI_ADAPT_PIXEL0_CNTL0_START_EN_MASK BIT(31)
+#define MIPI_ADAPT_PIXEL0_CNTL0_START_EN BIT(31)
+
+#define MIPI_ADAPT_ALIG_CNTL0 ADAP_REG_R(0x100)
+#define MIPI_ADAPT_ALIG_CNTL0_H_NUM_MASK GENMASK(15, 0)
+#define MIPI_ADAPT_ALIG_CNTL0_H_NUM(x) ((x) << 0)
+#define MIPI_ADAPT_ALIG_CNTL0_V_NUM_MASK GENMASK(31, 16)
+#define MIPI_ADAPT_ALIG_CNTL0_V_NUM(x) ((x) << 16)
+
+#define MIPI_ADAPT_ALIG_CNTL1 ADAP_REG_R(0x104)
+#define MIPI_ADAPT_ALIG_CNTL1_HPE_NUM_MASK GENMASK(31, 16)
+#define MIPI_ADAPT_ALIG_CNTL1_HPE_NUM(x) ((x) << 16)
+
+#define MIPI_ADAPT_ALIG_CNTL2 ADAP_REG_R(0x108)
+#define MIPI_ADAPT_ALIG_CNTL2_VPE_NUM_MASK GENMASK(31, 16)
+#define MIPI_ADAPT_ALIG_CNTL2_VPE_NUM(x) ((x) << 16)
+
+#define MIPI_ADAPT_ALIG_CNTL6 ADAP_REG_R(0x118)
+#define MIPI_ADAPT_ALIG_CNTL6_PATH0_EN_MASK BIT(0)
+#define MIPI_ADAPT_ALIG_CNTL6_PATH0_EN BIT(0)
+#define MIPI_ADAPT_ALIG_CNTL6_PATH0_DIS (0 << 0)
+#define MIPI_ADAPT_ALIG_CNTL6_PIX0_DATA_MODE_MASK BIT(4)
+#define MIPI_ADAPT_ALIG_CNTL6_PIX0_DATA_MODE_DDR (0 << 4)
+#define MIPI_ADAPT_ALIG_CNTL6_PIX0_DATA_MODE_DIRECT BIT(4)
+#define MIPI_ADAPT_ALIG_CNTL6_DATA0_EN_MASK BIT(12)
+#define MIPI_ADAPT_ALIG_CNTL6_DATA0_EN BIT(12)
+#define MIPI_ADAPT_ALIG_CNTL6_DATA0_DIS (0 << 12)
+
+#define MIPI_ADAPT_ALIG_CNTL8 ADAP_REG_R(0x120)
+#define MIPI_ADAPT_ALIG_CNTL8_FRMAE_CONTINUE_MASK BIT(5)
+#define MIPI_ADAPT_ALIG_CNTL8_FRMAE_CONTINUE_EN BIT(5)
+#define MIPI_ADAPT_ALIG_CNTL8_FRMAE_CONTINUE_DIS (0 << 5)
+#define MIPI_ADAPT_ALIG_CNTL8_EXCEED_DIS_MASK BIT(12)
+#define MIPI_ADAPT_ALIG_CNTL8_EXCEED_HOLD (0 << 12)
+#define MIPI_ADAPT_ALIG_CNTL8_EXCEED_NOT_HOLD BIT(12)
+#define MIPI_ADAPT_ALIG_CNTL8_START_EN_MASK BIT(31)
+#define MIPI_ADAPT_ALIG_CNTL8_START_EN BIT(31)
+
+#define MIPI_ADAP_MAX_WIDTH 2888
+#define MIPI_ADAP_MIN_WIDTH 160
+#define MIPI_ADAP_MAX_HEIGHT 2240
+#define MIPI_ADAP_MIN_HEIGHT 120
+#define MIPI_ADAP_DEFAULT_WIDTH 1920
+#define MIPI_ADAP_DEFAULT_HEIGHT 1080
+#define MIPI_ADAP_DEFAULT_FMT MEDIA_BUS_FMT_SRGGB10_1X10
+
+/* C3 MIPI adapter pad list */
+enum {
+ C3_MIPI_ADAP_PAD_SINK,
+ C3_MIPI_ADAP_PAD_SRC,
+ C3_MIPI_ADAP_PAD_MAX
+};
+
+/*
+ * struct c3_adap_info - mipi adapter information
+ *
+ * @clocks: array of mipi adapter clock names
+ * @clock_num: actual clock number
+ */
+struct c3_adap_info {
+ char *clocks[MIPI_ADAP_CLOCK_NUM_MAX];
+ u32 clock_num;
+};
+
+/*
+ * struct c3_adap_device - mipi adapter platform device
+ *
+ * @dev: pointer to the struct device
+ * @top: mipi adapter top register address
+ * @fd: mipi adapter frontend register address
+ * @rd: mipi adapter reader register address
+ * @clks: array of MIPI adapter clocks
+ * @sd: mipi adapter sub-device
+ * @pads: mipi adapter sub-device pads
+ * @notifier: notifier to register on the v4l2-async API
+ * @src_sd: source sub-device pad
+ * @info: version-specific MIPI adapter information
+ */
+struct c3_adap_device {
+ struct device *dev;
+ void __iomem *top;
+ void __iomem *fd;
+ void __iomem *rd;
+ struct clk_bulk_data clks[MIPI_ADAP_CLOCK_NUM_MAX];
+
+ struct v4l2_subdev sd;
+ struct media_pad pads[C3_MIPI_ADAP_PAD_MAX];
+ struct v4l2_async_notifier notifier;
+ struct media_pad *src_pad;
+
+ const struct c3_adap_info *info;
+};
+
+/* Format helpers */
+
+struct c3_adap_pix_format {
+ u32 code;
+ u8 type;
+};
+
+static const struct c3_adap_pix_format c3_mipi_adap_formats[] = {
+ { MEDIA_BUS_FMT_SBGGR10_1X10, MIPI_CSI2_DT_RAW10 },
+ { MEDIA_BUS_FMT_SGBRG10_1X10, MIPI_CSI2_DT_RAW10 },
+ { MEDIA_BUS_FMT_SGRBG10_1X10, MIPI_CSI2_DT_RAW10 },
+ { MEDIA_BUS_FMT_SRGGB10_1X10, MIPI_CSI2_DT_RAW10 },
+ { MEDIA_BUS_FMT_SBGGR12_1X12, MIPI_CSI2_DT_RAW12 },
+ { MEDIA_BUS_FMT_SGBRG12_1X12, MIPI_CSI2_DT_RAW12 },
+ { MEDIA_BUS_FMT_SGRBG12_1X12, MIPI_CSI2_DT_RAW12 },
+ { MEDIA_BUS_FMT_SRGGB12_1X12, MIPI_CSI2_DT_RAW12 },
+};
+
+static const struct c3_adap_pix_format *c3_mipi_adap_find_format(u32 code)
+{
+ for (unsigned int i = 0; i < ARRAY_SIZE(c3_mipi_adap_formats); i++)
+ if (code == c3_mipi_adap_formats[i].code)
+ return &c3_mipi_adap_formats[i];
+
+ return NULL;
+}
+
+/* Hardware configuration */
+
+static void c3_mipi_adap_update_bits(struct c3_adap_device *adap, u32 reg,
+ u32 mask, u32 val)
+{
+ void __iomem *addr;
+ u32 orig, tmp;
+
+ switch (ADAP_SUBMD(reg)) {
+ case SUBMD_TOP:
+ addr = adap->top + ADAP_REG_ADDR(reg);
+ break;
+ case SUBMD_FD:
+ addr = adap->fd + ADAP_REG_ADDR(reg);
+ break;
+ case SUBMD_RD:
+ addr = adap->rd + ADAP_REG_ADDR(reg);
+ break;
+ default:
+ dev_err(adap->dev,
+ "Invalid sub-module: %lu\n", ADAP_SUBMD(reg));
+ return;
+ }
+
+ orig = readl(addr);
+ tmp = orig & ~mask;
+ tmp |= val & mask;
+
+ if (tmp != orig)
+ writel(tmp, addr);
+}
+
+/* Configure adapter top sub module */
+static void c3_mipi_adap_cfg_top(struct c3_adap_device *adap)
+{
+ /* Bypass decompress */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DE_CTRL0,
+ MIPI_ADAPT_DE_CTRL0_RD_BUS_BYPASS_MASK,
+ MIPI_ADAPT_DE_CTRL0_RD_BUS_BYPASS_EN);
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DE_CTRL0,
+ MIPI_ADAPT_DE_CTRL0_WR_BUS_BYPASS_MASK,
+ MIPI_ADAPT_DE_CTRL0_WR_BUS_BYPASS_EN);
+}
+
+/* Configure adapter frontend sub module */
+static void c3_mipi_adap_cfg_frontend(struct c3_adap_device *adap,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ /* Reset frontend module */
+ c3_mipi_adap_update_bits(adap, CSI2_CLK_RESET,
+ CSI2_CLK_RESET_SW_RESET_MASK,
+ CSI2_CLK_RESET_SW_RESET_APPLY);
+ c3_mipi_adap_update_bits(adap, CSI2_CLK_RESET,
+ CSI2_CLK_RESET_SW_RESET_MASK,
+ CSI2_CLK_RESET_SW_RESET_RELEASE);
+ c3_mipi_adap_update_bits(adap, CSI2_CLK_RESET,
+ CSI2_CLK_RESET_CLK_ENABLE_MASK,
+ CSI2_CLK_RESET_CLK_ENABLE_EN);
+
+ c3_mipi_adap_update_bits(adap, CSI2_X_START_END_ISP,
+ CSI2_X_START_END_ISP_X_START_MASK,
+ CSI2_X_START_END_ISP_X_START(0));
+ c3_mipi_adap_update_bits(adap, CSI2_X_START_END_ISP,
+ CSI2_X_START_END_ISP_X_END_MASK,
+ CSI2_X_START_END_ISP_X_END(fmt->width));
+
+ c3_mipi_adap_update_bits(adap, CSI2_Y_START_END_ISP,
+ CSI2_Y_START_END_ISP_Y_START_MASK,
+ CSI2_Y_START_END_ISP_Y_START(0));
+ c3_mipi_adap_update_bits(adap, CSI2_Y_START_END_ISP,
+ CSI2_Y_START_END_ISP_Y_END_MASK,
+ CSI2_Y_START_END_ISP_Y_END(fmt->height));
+
+ /* Select VS and HS signal for direct path */
+ c3_mipi_adap_update_bits(adap, CSI2_VC_MODE,
+ CSI2_VC_MODE_VS_ISP_SEL_VC_MASK,
+ CSI2_VC_MODE_VS_ISP_SEL_VC_0);
+ c3_mipi_adap_update_bits(adap, CSI2_VC_MODE,
+ CSI2_VC_MODE_HS_ISP_SEL_VC_MASK,
+ CSI2_VC_MODE_HS_ISP_SEL_VC_0);
+
+ /* Enable to receive RAW packet */
+ c3_mipi_adap_update_bits(adap, CSI2_GEN_CTRL0,
+ CSI2_GEN_CTRL0_ENABLE_PACKETS_MASK,
+ CSI2_GEN_CTRL0_ENABLE_PACKETS_RAW);
+
+ /* Enable virtual channel 0 */
+ c3_mipi_adap_update_bits(adap, CSI2_GEN_CTRL0,
+ CSI2_GEN_CTRL0_VC0_MASK,
+ CSI2_GEN_CTRL0_VC0_EN);
+}
+
+static void c3_mipi_adap_cfg_rd0(struct c3_adap_device *adap)
+{
+ /* Select direct mode for DDR_RD0 mode */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DDR_RD0_CNTL1,
+ MIPI_ADAPT_DDR_RD0_CNTL1_PORT_SEL_MASK,
+ MIPI_ADAPT_DDR_RD0_CNTL1_PORT_SEL_DIRECT_MODE);
+
+ /* Data can't bypass DDR_RD0 in direct mode, so enable DDR_RD0 here */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_DDR_RD0_CNTL0,
+ MIPI_ADAPT_DDR_RD0_CNTL0_MODULE_EN_MASK,
+ MIPI_ADAPT_DDR_RD0_CNTL0_MODULE_EN);
+}
+
+static void c3_mipi_adap_cfg_pixel0(struct c3_adap_device *adap,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ const struct c3_adap_pix_format *pix;
+
+ pix = c3_mipi_adap_find_format(fmt->code);
+
+ /* Set work mode and data type for PIXEL0 module */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL0,
+ MIPI_ADAPT_PIXEL0_CNTL0_WORK_MODE_MASK,
+ MIPI_ADAPT_PIXEL0_CNTL0_WORK_MODE_RAW_DIRECT);
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL0,
+ MIPI_ADAPT_PIXEL0_CNTL0_DATA_TYPE_MASK,
+ MIPI_ADAPT_PIXEL0_CNTL0_DATA_TYPE(pix->type));
+
+ /* Start PIXEL0 module */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_PIXEL0_CNTL0,
+ MIPI_ADAPT_PIXEL0_CNTL0_START_EN_MASK,
+ MIPI_ADAPT_PIXEL0_CNTL0_START_EN);
+}
+
+static void c3_mipi_adap_cfg_alig(struct c3_adap_device *adap,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ /*
+ * ISP hardware requires the number of horizonal blanks greater than
+ * 64 cycles, so adding 64 here.
+ */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL0,
+ MIPI_ADAPT_ALIG_CNTL0_H_NUM_MASK,
+ MIPI_ADAPT_ALIG_CNTL0_H_NUM(fmt->width + 64));
+
+ /*
+ * ISP hardware requires the number of vertical blanks greater than
+ * 40 lines, so adding 40 here.
+ */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL0,
+ MIPI_ADAPT_ALIG_CNTL0_V_NUM_MASK,
+ MIPI_ADAPT_ALIG_CNTL0_V_NUM(fmt->height + 40));
+
+ /* End pixel in a line */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL1,
+ MIPI_ADAPT_ALIG_CNTL1_HPE_NUM_MASK,
+ MIPI_ADAPT_ALIG_CNTL1_HPE_NUM(fmt->width));
+
+ /* End line in a frame */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL2,
+ MIPI_ADAPT_ALIG_CNTL2_VPE_NUM_MASK,
+ MIPI_ADAPT_ALIG_CNTL2_VPE_NUM(fmt->height));
+
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
+ MIPI_ADAPT_ALIG_CNTL6_PATH0_EN_MASK,
+ MIPI_ADAPT_ALIG_CNTL6_PATH0_EN);
+
+ /* Select direct mode for ALIG module */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
+ MIPI_ADAPT_ALIG_CNTL6_PIX0_DATA_MODE_MASK,
+ MIPI_ADAPT_ALIG_CNTL6_PIX0_DATA_MODE_DIRECT);
+
+ /* Enable to send raw data */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL6,
+ MIPI_ADAPT_ALIG_CNTL6_DATA0_EN_MASK,
+ MIPI_ADAPT_ALIG_CNTL6_DATA0_EN);
+
+ /* Set continue mode and disable hold counter */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL8,
+ MIPI_ADAPT_ALIG_CNTL8_FRMAE_CONTINUE_MASK,
+ MIPI_ADAPT_ALIG_CNTL8_FRMAE_CONTINUE_EN);
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL8,
+ MIPI_ADAPT_ALIG_CNTL8_EXCEED_DIS_MASK,
+ MIPI_ADAPT_ALIG_CNTL8_EXCEED_NOT_HOLD);
+
+ /* Start ALIG module */
+ c3_mipi_adap_update_bits(adap, MIPI_ADAPT_ALIG_CNTL8,
+ MIPI_ADAPT_ALIG_CNTL8_START_EN_MASK,
+ MIPI_ADAPT_ALIG_CNTL8_START_EN);
+}
+
+/* V4L2 subdev operations */
+
+static int c3_mipi_adap_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ u32 pad, u64 streams_mask)
+{
+ struct c3_adap_device *adap = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *fmt;
+ struct media_pad *sink_pad;
+ struct v4l2_subdev *src_sd;
+ int ret;
+
+ sink_pad = &adap->pads[C3_MIPI_ADAP_PAD_SINK];
+ adap->src_pad = media_pad_remote_pad_unique(sink_pad);
+ if (IS_ERR(adap->src_pad)) {
+ dev_dbg(adap->dev, "Failed to get source pad for MIPI adap\n");
+ return -EPIPE;
+ }
+
+ src_sd = media_entity_to_v4l2_subdev(adap->src_pad->entity);
+
+ pm_runtime_resume_and_get(adap->dev);
+
+ fmt = v4l2_subdev_state_get_format(state, C3_MIPI_ADAP_PAD_SINK);
+
+ c3_mipi_adap_cfg_top(adap);
+ c3_mipi_adap_cfg_frontend(adap, fmt);
+ c3_mipi_adap_cfg_rd0(adap);
+ c3_mipi_adap_cfg_pixel0(adap, fmt);
+ c3_mipi_adap_cfg_alig(adap, fmt);
+
+ ret = v4l2_subdev_enable_streams(src_sd, adap->src_pad->index, BIT(0));
+ if (ret) {
+ pm_runtime_put(adap->dev);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int c3_mipi_adap_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ u32 pad, u64 streams_mask)
+{
+ struct c3_adap_device *adap = v4l2_get_subdevdata(sd);
+ struct v4l2_subdev *src_sd;
+
+ if (adap->src_pad) {
+ src_sd = media_entity_to_v4l2_subdev(adap->src_pad->entity);
+ v4l2_subdev_disable_streams(src_sd, adap->src_pad->index,
+ BIT(0));
+ }
+ adap->src_pad = NULL;
+
+ pm_runtime_put(adap->dev);
+
+ return 0;
+}
+
+static int c3_mipi_adap_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ switch (code->pad) {
+ case C3_MIPI_ADAP_PAD_SINK:
+ if (code->index >= ARRAY_SIZE(c3_mipi_adap_formats))
+ return -EINVAL;
+
+ code->code = c3_mipi_adap_formats[code->index].code;
+ break;
+ case C3_MIPI_ADAP_PAD_SRC:
+ struct v4l2_mbus_framefmt *fmt;
+
+ if (code->index)
+ return -EINVAL;
+
+ fmt = v4l2_subdev_state_get_format(state, code->pad);
+ code->code = fmt->code;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int c3_mipi_adap_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *format)
+{
+ struct v4l2_mbus_framefmt *fmt;
+ const struct c3_adap_pix_format *pix_format;
+
+ if (format->pad != C3_MIPI_ADAP_PAD_SINK)
+ return v4l2_subdev_get_fmt(sd, state, format);
+
+ pix_format = c3_mipi_adap_find_format(format->format.code);
+ if (!pix_format)
+ pix_format = &c3_mipi_adap_formats[0];
+
+ fmt = v4l2_subdev_state_get_format(state, format->pad);
+ fmt->code = pix_format->code;
+ fmt->width = clamp_t(u32, format->format.width,
+ MIPI_ADAP_MIN_WIDTH, MIPI_ADAP_MAX_WIDTH);
+ fmt->height = clamp_t(u32, format->format.height,
+ MIPI_ADAP_MIN_HEIGHT, MIPI_ADAP_MAX_HEIGHT);
+ fmt->colorspace = V4L2_COLORSPACE_RAW;
+ fmt->xfer_func = V4L2_XFER_FUNC_NONE;
+ fmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
+ fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
+
+ format->format = *fmt;
+
+ /* Synchronize the format to source pad */
+ fmt = v4l2_subdev_state_get_format(state, C3_MIPI_ADAP_PAD_SRC);
+ *fmt = format->format;
+
+ return 0;
+}
+
+static int c3_mipi_adap_init_state(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ struct v4l2_mbus_framefmt *sink_fmt;
+ struct v4l2_mbus_framefmt *src_fmt;
+
+ sink_fmt = v4l2_subdev_state_get_format(state, C3_MIPI_ADAP_PAD_SINK);
+ src_fmt = v4l2_subdev_state_get_format(state, C3_MIPI_ADAP_PAD_SRC);
+
+ sink_fmt->width = MIPI_ADAP_DEFAULT_WIDTH;
+ sink_fmt->height = MIPI_ADAP_DEFAULT_HEIGHT;
+ sink_fmt->field = V4L2_FIELD_NONE;
+ sink_fmt->code = MIPI_ADAP_DEFAULT_FMT;
+ sink_fmt->colorspace = V4L2_COLORSPACE_RAW;
+ sink_fmt->xfer_func = V4L2_XFER_FUNC_NONE;
+ sink_fmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
+ sink_fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
+
+ *src_fmt = *sink_fmt;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops c3_mipi_adap_pad_ops = {
+ .enum_mbus_code = c3_mipi_adap_enum_mbus_code,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = c3_mipi_adap_set_fmt,
+ .enable_streams = c3_mipi_adap_enable_streams,
+ .disable_streams = c3_mipi_adap_disable_streams,
+};
+
+static const struct v4l2_subdev_ops c3_mipi_adap_subdev_ops = {
+ .pad = &c3_mipi_adap_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops c3_mipi_adap_internal_ops = {
+ .init_state = c3_mipi_adap_init_state,
+};
+
+/* Media entity operations */
+static const struct media_entity_operations c3_mipi_adap_entity_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+/* PM runtime */
+
+static int c3_mipi_adap_runtime_suspend(struct device *dev)
+{
+ struct c3_adap_device *adap = dev_get_drvdata(dev);
+
+ clk_bulk_disable_unprepare(adap->info->clock_num, adap->clks);
+
+ return 0;
+}
+
+static int c3_mipi_adap_runtime_resume(struct device *dev)
+{
+ struct c3_adap_device *adap = dev_get_drvdata(dev);
+
+ return clk_bulk_prepare_enable(adap->info->clock_num, adap->clks);
+}
+
+static const struct dev_pm_ops c3_mipi_adap_pm_ops = {
+ SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ RUNTIME_PM_OPS(c3_mipi_adap_runtime_suspend,
+ c3_mipi_adap_runtime_resume, NULL)
+};
+
+/* Probe/remove & platform driver */
+
+static int c3_mipi_adap_subdev_init(struct c3_adap_device *adap)
+{
+ struct v4l2_subdev *sd = &adap->sd;
+ int ret;
+
+ v4l2_subdev_init(sd, &c3_mipi_adap_subdev_ops);
+ sd->owner = THIS_MODULE;
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ sd->internal_ops = &c3_mipi_adap_internal_ops;
+ snprintf(sd->name, sizeof(sd->name), "%s", MIPI_ADAP_SUBDEV_NAME);
+
+ sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ sd->entity.ops = &c3_mipi_adap_entity_ops;
+
+ sd->dev = adap->dev;
+ v4l2_set_subdevdata(sd, adap);
+
+ adap->pads[C3_MIPI_ADAP_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ adap->pads[C3_MIPI_ADAP_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&sd->entity, C3_MIPI_ADAP_PAD_MAX,
+ adap->pads);
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_init_finalize(sd);
+ if (ret) {
+ media_entity_cleanup(&sd->entity);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void c3_mipi_adap_subdev_deinit(struct c3_adap_device *adap)
+{
+ v4l2_subdev_cleanup(&adap->sd);
+ media_entity_cleanup(&adap->sd.entity);
+}
+
+/* Subdev notifier register */
+static int c3_mipi_adap_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *sd,
+ struct v4l2_async_connection *asc)
+{
+ struct c3_adap_device *adap = v4l2_get_subdevdata(notifier->sd);
+ struct media_pad *sink = &adap->sd.entity.pads[C3_MIPI_ADAP_PAD_SINK];
+
+ return v4l2_create_fwnode_links_to_pad(sd, sink, MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+}
+
+static const struct v4l2_async_notifier_operations c3_mipi_adap_notify_ops = {
+ .bound = c3_mipi_adap_notify_bound,
+};
+
+static int c3_mipi_adap_async_register(struct c3_adap_device *adap)
+{
+ struct v4l2_async_connection *asc;
+ struct fwnode_handle *ep;
+ int ret;
+
+ v4l2_async_subdev_nf_init(&adap->notifier, &adap->sd);
+
+ ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(adap->dev), 0, 0,
+ FWNODE_GRAPH_ENDPOINT_NEXT);
+ if (!ep)
+ return -ENOTCONN;
+
+ asc = v4l2_async_nf_add_fwnode_remote(&adap->notifier, ep,
+ struct v4l2_async_connection);
+ if (IS_ERR(asc)) {
+ ret = PTR_ERR(asc);
+ goto err_put_handle;
+ }
+
+ adap->notifier.ops = &c3_mipi_adap_notify_ops;
+ ret = v4l2_async_nf_register(&adap->notifier);
+ if (ret)
+ goto err_cleanup_nf;
+
+ ret = v4l2_async_register_subdev(&adap->sd);
+ if (ret)
+ goto err_unregister_nf;
+
+ fwnode_handle_put(ep);
+
+ return 0;
+
+err_unregister_nf:
+ v4l2_async_nf_unregister(&adap->notifier);
+err_cleanup_nf:
+ v4l2_async_nf_cleanup(&adap->notifier);
+err_put_handle:
+ fwnode_handle_put(ep);
+ return ret;
+}
+
+static void c3_mipi_adap_async_unregister(struct c3_adap_device *adap)
+{
+ v4l2_async_unregister_subdev(&adap->sd);
+ v4l2_async_nf_unregister(&adap->notifier);
+ v4l2_async_nf_cleanup(&adap->notifier);
+}
+
+static int c3_mipi_adap_ioremap_resource(struct c3_adap_device *adap)
+{
+ struct device *dev = adap->dev;
+ struct platform_device *pdev = to_platform_device(dev);
+
+ adap->top = devm_platform_ioremap_resource_byname(pdev, "top");
+ if (IS_ERR(adap->top))
+ return PTR_ERR(adap->top);
+
+ adap->fd = devm_platform_ioremap_resource_byname(pdev, "fd");
+ if (IS_ERR(adap->fd))
+ return PTR_ERR(adap->fd);
+
+ adap->rd = devm_platform_ioremap_resource_byname(pdev, "rd");
+ if (IS_ERR(adap->rd))
+ return PTR_ERR(adap->rd);
+
+ return 0;
+}
+
+static int c3_mipi_adap_get_clocks(struct c3_adap_device *adap)
+{
+ const struct c3_adap_info *info = adap->info;
+
+ for (unsigned int i = 0; i < info->clock_num; i++)
+ adap->clks[i].id = info->clocks[i];
+
+ return devm_clk_bulk_get(adap->dev, info->clock_num, adap->clks);
+}
+
+static int c3_mipi_adap_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct c3_adap_device *adap;
+ int ret;
+
+ adap = devm_kzalloc(dev, sizeof(*adap), GFP_KERNEL);
+ if (!adap)
+ return -ENOMEM;
+
+ adap->info = of_device_get_match_data(dev);
+ adap->dev = dev;
+
+ ret = c3_mipi_adap_ioremap_resource(adap);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to ioremap resource\n");
+
+ ret = c3_mipi_adap_get_clocks(adap);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to get clocks\n");
+
+ platform_set_drvdata(pdev, adap);
+
+ pm_runtime_enable(dev);
+
+ ret = c3_mipi_adap_subdev_init(adap);
+ if (ret)
+ goto err_disable_runtime_pm;
+
+ ret = c3_mipi_adap_async_register(adap);
+ if (ret)
+ goto err_deinit_subdev;
+
+ return 0;
+
+err_deinit_subdev:
+ c3_mipi_adap_subdev_deinit(adap);
+err_disable_runtime_pm:
+ pm_runtime_disable(dev);
+ return ret;
+};
+
+static void c3_mipi_adap_remove(struct platform_device *pdev)
+{
+ struct c3_adap_device *adap = platform_get_drvdata(pdev);
+
+ c3_mipi_adap_async_unregister(adap);
+ c3_mipi_adap_subdev_deinit(adap);
+
+ pm_runtime_disable(&pdev->dev);
+};
+
+static const struct c3_adap_info c3_mipi_adap_info = {
+ .clocks = {"vapb", "isp0"},
+ .clock_num = 2
+};
+
+static const struct of_device_id c3_mipi_adap_of_match[] = {
+ {
+ .compatible = "amlogic,c3-mipi-adapter",
+ .data = &c3_mipi_adap_info
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, c3_mipi_adap_of_match);
+
+static struct platform_driver c3_mipi_adap_driver = {
+ .probe = c3_mipi_adap_probe,
+ .remove = c3_mipi_adap_remove,
+ .driver = {
+ .name = "c3-mipi-adapter",
+ .of_match_table = c3_mipi_adap_of_match,
+ .pm = pm_ptr(&c3_mipi_adap_pm_ops),
+ },
+};
+
+module_platform_driver(c3_mipi_adap_driver);
+
+MODULE_AUTHOR("Keke Li <keke.li@amlogic.com>");
+MODULE_DESCRIPTION("Amlogic C3 MIPI adapter");
+MODULE_LICENSE("GPL");

--
2.47.1