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Message-Id: <20250701-95_cam-v1-5-c5172bab387b@nxp.com>
Date: Tue, 01 Jul 2025 18:06:10 -0400
From: Frank Li <Frank.Li@....com>
To: Rui Miguel Silva <rmfrfs@...il.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Martin Kepplinger <martink@...teo.de>, Purism Kernel Team <kernel@...i.sm>,
Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Eugen Hristev <eugen.hristev@...aro.org>, Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>, Peng Fan <peng.fan@....com>,
Alice Yuan <alice.yuan@....com>, Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org, linux-phy@...ts.infradead.org,
Frank Li <Frank.Li@....com>, "Guoniu.zhou" <guoniu.zhou@....com>
Subject: [PATCH 5/7] media: nxp: add DesignWare MIPI CSI2 controller driver
From: "Guoniu.zhou" <guoniu.zhou@....com>
Add V4L2 subdev driver for DesignWare MIPI CSI2 controller.
Signed-off-by: Guoniu.zhou <guoniu.zhou@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
MAINTAINERS | 1 +
drivers/media/platform/nxp/Kconfig | 11 +
drivers/media/platform/nxp/Makefile | 1 +
drivers/media/platform/nxp/dwc-mipi-csi2.c | 1675 ++++++++++++++++++++++++++++
4 files changed, 1688 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index e208c91f1405f..f67db23cb9d6f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15022,6 +15022,7 @@ F: Documentation/devicetree/bindings/media/nxp,imx-mipi-csi2.yaml
F: Documentation/devicetree/bindings/media/nxp,imx7-csi.yaml
F: Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml
F: Documentation/devicetree/bindings/media/snps,dw-mipi-csi2-v150.yaml
+F: drivers/media/platform/nxp/dwc-mipi-csi2.c
F: drivers/media/platform/nxp/imx-mipi-csis.c
F: drivers/media/platform/nxp/imx-parallel-csi.c
F: drivers/media/platform/nxp/imx7-media-csi.c
diff --git a/drivers/media/platform/nxp/Kconfig b/drivers/media/platform/nxp/Kconfig
index 5df6f97d16f29..b7a4aed706443 100644
--- a/drivers/media/platform/nxp/Kconfig
+++ b/drivers/media/platform/nxp/Kconfig
@@ -4,6 +4,17 @@
comment "NXP media platform drivers"
+config VIDEO_DWC_MIPI_CSIS
+ tristate "DesignWare Cores MIPI CSI-2 receiver found on i.MX93"
+ depends on ARCH_MXC || COMPILE_TEST
+ depends on VIDEO_DEV
+ select MEDIA_CONTROLLER
+ select V4L2_FWNODE
+ select VIDEO_V4L2_SUBDEV_API
+ help
+ Video4Linux2 sub-device driver for the DesignWare Cores MIPI
+ CSI-2 receiver used on i.MX93.
+
config VIDEO_IMX7_CSI
tristate "NXP CSI Bridge driver"
depends on ARCH_MXC || COMPILE_TEST
diff --git a/drivers/media/platform/nxp/Makefile b/drivers/media/platform/nxp/Makefile
index 9a9b2a1d6886c..a0a025c169aca 100644
--- a/drivers/media/platform/nxp/Makefile
+++ b/drivers/media/platform/nxp/Makefile
@@ -4,6 +4,7 @@ obj-y += dw100/
obj-y += imx-jpeg/
obj-y += imx8-isi/
+obj-$(CONFIG_VIDEO_DWC_MIPI_CSIS) += dwc-mipi-csi2.o
obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-media-csi.o
obj-$(CONFIG_VIDEO_IMX8MQ_MIPI_CSI2) += imx8mq-mipi-csi2.o
obj-$(CONFIG_VIDEO_IMX_PARALLEL_CSI) += imx-parallel-csi.o
diff --git a/drivers/media/platform/nxp/dwc-mipi-csi2.c b/drivers/media/platform/nxp/dwc-mipi-csi2.c
new file mode 100644
index 0000000000000..cd57c06b95848
--- /dev/null
+++ b/drivers/media/platform/nxp/dwc-mipi-csi2.c
@@ -0,0 +1,1675 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2025 NXP
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <media/mipi-csi2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-mc.h>
+#include <media/v4l2-subdev.h>
+
+/* MIPI CSI-2 Host Controller Registers Define */
+
+/* Core Version */
+#define CSI2RX_VERSION 0x0
+
+/* Number of Lanes */
+#define CSI2RX_N_LANES 0x4
+#define CSI2RX_N_LANES_N_LANES(x) FIELD_PREP(GENMASK(2, 0), (x) - 1)
+
+/* Logic Reset */
+#define CSI2RX_HOST_RESETN 0x8
+#define CSI2RX_HOST_RESETN_ENABLE BIT(0)
+
+/* Main Interrupt Status */
+#define CSI2RX_INT_ST_MAIN 0xc
+#define CSI2RX_INT_ST_MAIN_FATAL_ERR_PHY BIT(0)
+#define CSI2RX_INT_ST_MAIN_FATAL_ERR_PKT BIT(1)
+#define CSI2RX_INT_ST_MAIN_FATAL_ERR_BNDRY_FRAMEL BIT(2)
+#define CSI2RX_INT_ST_MAIN_FATAL_ERR_SEQ_FRAME BIT(3)
+#define CSI2RX_INT_ST_MAIN_FATAL_ERR_CRC_FRAME BIT(4)
+#define CSI2RX_INT_ST_MAIN_FATAL_ERR_PLD_CRC BIT(5)
+#define CSI2RX_INT_ST_MAIN_ERR_DID BIT(6)
+#define CSI2RX_INT_ST_MAIN_ERR_ECC BIT(7)
+#define CSI2RX_INT_ST_MAIN_ERR_PHY BIT(16)
+#define CSI2RX_INT_ST_MAIN_FATAL_ERR_IPI BIT(18)
+
+/* Data monitor */
+#define CSI2RX_DATA_IDS_1_DT 0x10
+#define CSI2RX_DATA_IDS_1_DT_DATA_ID0(x) FIELD_PREP(GENMASK(5, 0), (x))
+#define CSI2RX_DATA_IDS_1_DT_DATA_ID1(x) FIELD_PREP(GENMASK(13, 8), (x))
+#define CSI2RX_DATA_IDS_1_DT_DATA_ID2(x) FIELD_PREP(GENMASK(21, 16), (x))
+#define CSI2RX_DATA_IDS_1_DT_DATA_ID3(x) FIELD_PREP(GENMASK(29, 24), (x))
+
+#define CSI2RX_DATA_IDS_2_DT 0x14
+#define CSI2RX_DATA_IDS_2_DT_DATA_ID4(x) FIELD_PREP(GENMASK(5, 0), (x))
+#define CSI2RX_DATA_IDS_2_DT_DATA_ID5(x) FIELD_PREP(GENMASK(13, 8), (x))
+#define CSI2RX_DATA_IDS_2_DT_DATA_ID6(x) FIELD_PREP(GENMASK(21, 16), (x))
+#define CSI2RX_DATA_IDS_2_DT_DATA_ID7(x) FIELD_PREP(GENMASK(29, 24), (x))
+
+#define CSI2RX_DATA_IDS_1_VC 0x30
+#define CSI2RX_DATA_IDS_1_VC_DATA_ID0(x) FIELD_PREP(GENMASK(3, 0), (x))
+#define CSI2RX_DATA_IDS_1_VC_DATA_ID1(x) FIELD_PREP(GENMASK(11, 8), (x))
+#define CSI2RX_DATA_IDS_1_VC_DATA_ID2(x) FIELD_PREP(GENMASK(19, 16), (x))
+#define CSI2RX_DATA_IDS_1_VC_DATA_ID3(x) FIELD_PREP(GENMASK(27, 24), (x))
+
+#define CSI2RX_DATA_IDS_2_VC 0x34
+#define CSI2RX_DATA_IDS_2_VC_DATA_ID4(x) FIELD_PREP(GENMASK(3, 0), (x))
+#define CSI2RX_DATA_IDS_2_VC_DATA_ID5(x) FIELD_PREP(GENMASK(11, 8), (x))
+#define CSI2RX_DATA_IDS_2_VC_DATA_ID6(x) FIELD_PREP(GENMASK(19, 16), (x))
+#define CSI2RX_DATA_IDS_2_VC_DATA_ID7(x) FIELD_PREP(GENMASK(27, 24), (x))
+
+/* PHY Shutdown */
+#define CSI2RX_DPHY_SHUTDOWNZ 0x40
+#define CSI2RX_DPHY_SHUTDOWNZ_ENABLE BIT(0)
+
+/* DPHY Reset */
+#define CSI2RX_DPHY_RSTZ 0x44
+#define CSI2RX_DPHY_RSTZ_ENABLE BIT(0)
+
+/* RX PHY Status */
+#define CSI2RX_DPHY_RX_STATUS 0x48
+#define CSI2RX_DPHY_RX_STATUS_DATA_LANE0_ULP BIT(0)
+#define CSI2RX_DPHY_RX_STATUS_DATA_LANE1_ULP BIT(1)
+#define CSI2RX_DPHY_RX_STATUS_CLK_LANE_ULP BIT(16)
+#define CSI2RX_DPHY_RX_STATUS_CLK_LANE_HS BIT(17)
+
+/* STOP STATE PHY Status */
+#define CSI2RX_DPHY_STOPSTATE 0x4c
+#define CSI2RX_DPHY_STOPSTATE_DATA_LANE0 BIT(0)
+#define CSI2RX_DPHY_STOPSTATE_DATA_LANE1 BIT(1)
+#define CSI2RX_DPHY_STOPSTATE_DATA_LANE2 BIT(2)
+#define CSI2RX_DPHY_STOPSTATE_DATA_LANE3 BIT(3)
+#define CSI2RX_DPHY_STOPSTATE_CLK_LANE BIT(16)
+
+/* DPHY Test and Control Interface 1 */
+#define CSI2RX_DPHY_TEST_CTRL0 0x50
+#define CSI2RX_DPHY_TEST_CTRL0_TEST_CLR BIT(0)
+#define CSI2RX_DPHY_TEST_CTRL0_TEST_CLKEN BIT(1)
+
+/* DPHY Test and Control Interface 2 */
+#define CSI2RX_DPHY_TEST_CTRL1 0x54
+#define CSI2RX_DPHY_TEST_CTRL1_TEST_DIN(x) FIELD_PREP(GENMASK(7, 0), (x))
+#define CSI2RX_DPHY_TEST_CTRL1_TEST_DOUT(x) FIELD_GET(GENMASK(15, 8), (x))
+#define CSI2RX_DPHY_TEST_CTRL1_TEST_EN BIT(16)
+
+/* Pattern Generator vertical Resolution */
+#define CSI2RX_PPI_PG_PATTERN_VRES 0x60
+#define CSI2RX_PPI_PG_PATTERN_VRES_VRES(x) FIELD_PREP(GENMASK(15, 0), (x))
+
+/* Pattern Generator horizontal Resolution */
+#define CSI2RX_PPI_PG_PATTERN_HRES 0x64
+#define CSI2RX_PPI_PG_PATTERN_HRES_HRES(x) FIELD_PREP(GENMASK(15, 0), (x))
+
+/* Pattern Generator */
+#define CSI2RX_PPI_PG_CONFIG 0x68
+#define CSI2RX_PPI_PG_CONFIG_PG_MODE(x) FIELD_PREP(1, (x))
+#define CSI2RX_PPI_PG_CONFIG_DATA_TYPE(x) FIELD_PREP(GENMASK(13, 8), (x))
+#define CSI2RX_PPI_PG_CONFIG_VIR_CHAN(x) FIELD_PREP(GENMASK(15, 14), (x))
+#define CSI2RX_PPI_PG_CONFIG_VIR_CHAN_EX(x) FIELD_PREP(GENMASK(17, 16), (x))
+#define CSI2RX_PPI_PG_CONFIG_VIR_CHAN_EX_2_EN BIT(18)
+
+/* Pattern Generator Enable */
+#define CSI2RX_PPI_PG_ENABLE 0x6c
+#define CSI2RX_PPI_PG_ENABLE_EN BIT(0)
+
+/* Pattern Generator Status */
+#define CSI2RX_PPI_PG_STATUS 0x70
+#define CSI2RX_PPI_PG_STATUS_ACTIVE BIT(0)
+
+/* IPI Mode */
+#define CSI2RX_IPI_MODE 0x80
+#define CSI2RX_IPI_MODE_CONTROLLER BIT(1)
+#define CSI2RX_IPI_MODE_COLOR_MODE16 BIT(8)
+#define CSI2RX_IPI_MODE_CUT_THROUGH BIT(16)
+#define CSI2RX_IPI_MODE_ENABLE BIT(24)
+
+/* IPI Virtual Channel */
+#define CSI2RX_IPI_VCID 0x84
+#define CSI2RX_IPI_VCID_VC(x) FIELD_PREP(GENMASK(1, 0), (x))
+#define CSI2RX_IPI_VCID_VC_0_1(x) FIELD_PREP(GENMASK(3, 2), (x))
+#define CSI2RX_IPI_VCID_VC_2 BIT(4)
+
+/* IPI Data Type */
+#define CSI2RX_IPI_DATA_TYPE 0x88
+#define CSI2RX_IPI_DATA_TYPE_DT(x) FIELD_PREP(GENMASK(5, 0), (x))
+#define CSI2RX_IPI_DATA_TYPE_EMB_DATA_EN BIT(8)
+
+/* IPI Flush Memory */
+#define CSI2RX_IPI_MEM_FLUSH 0x8c
+#define CSI2RX_IPI_MEM_FLUSH_AUTO BIT(8)
+
+/* IPI HSA */
+#define CSI2RX_IPI_HSA_TIME 0x90
+#define CSI2RX_IPI_HSA_TIME_VAL(x) FIELD_PREP(GENMASK(11, 0), (x))
+
+/* IPI HBP */
+#define CSI2RX_IPI_HBP_TIME 0x94
+#define CSI2RX_IPI_HBP_TIME_VAL(x) FIELD_PREP(GENMASK(11, 0), (x))
+
+/* IPI HSD */
+#define CSI2RX_IPI_HSD_TIME 0x98
+#define CSI2RX_IPI_HSD_TIME_VAL(x) FIELD_PREP(GENMASK(11, 0), (x))
+
+/* IPI HLINE */
+#define CSI2RX_IPI_HLINE_TIME 0x9C
+#define CSI2RX_IPI_HLINE_TIME_VAL(x) FIELD_PREP(GENMASK(14, 0), (x))
+
+/* IPI Soft Reset */
+#define CSI2RX_IPI_SOFTRSTN 0xa0
+
+/* IPI Advanced Features */
+#define CSI2RX_IPI_ADV_FEATURES 0xac
+#define CSI2RX_IPI_ADV_FEATURES_DT_OVER_WRITE_EN BIT(0)
+#define CSI2RX_IPI_ADV_FEATURES_DT_OVER_WRITE(x) FIELD_PREP(GENMASK(13, 8), (x))
+#define CSI2RX_IPI_ADV_FEATURES_LINE_EVENT_SEL BIT(16)
+#define CSI2RX_IPI_ADV_FEATURES_SYNC_VIDEO_PKT BIT(17)
+#define CSI2RX_IPI_ADV_FEATURES_SYNC_LS_PKT BIT(18)
+#define CSI2RX_IPI_ADV_FEATURES_SYNC_NULL_PKT BIT(19)
+#define CSI2RX_IPI_ADV_FEATURES_SYNC_BLANKING_PKT BIT(20)
+#define CSI2RX_IPI_ADV_FEATURES_SYNC_EMBEDDED_PKT BIT(21)
+#define CSI2RX_IPI_ADV_FEATURES_SYNC_EVENT_MODE BIT(24)
+
+/* IPI VSA */
+#define CSI2RX_IPI_VSA_LINES 0xb0
+#define CSI2RX_IPI_VSA_LINES_VAL(x) FIELD_PREP(GENMASK(9, 0), (x))
+
+/* IPI VBP */
+#define CSI2RX_IPI_VBP_LINES 0xb4
+#define CSI2RX_IPI_VBP_LINES_VAL(x) FIELD_PREP(GENMASK(9, 0), (x))
+
+/* IPI VFP */
+#define CSI2RX_IPI_VFP_LINES 0xb8
+#define CSI2RX_IPI_VFP_LINES_VAL(x) FIELD_PREP(GENMASK(9, 0), (x))
+
+/* IPI VACTIVE */
+#define CSI2RX_IPI_VACTIVE_LINES 0xbc
+#define CSI2RX_IPI_VACTIVE_LINES_VAL(x) FIELD_PREP(GENMASK(13, 0), (x))
+
+/* Fatal Interruption Caused by PHY */
+#define CSI2RX_INT_ST_DPHY_FATAL 0xe0
+#define CSI2RX_INT_ST_DPHY_FATAL_ERR_SOT_LANE0 BIT(0)
+#define CSI2RX_INT_ST_DPHY_FATAL_ERR_SOT_LANE1 BIT(1)
+
+/* Mask for Fatal Interruption Caused by PHY */
+#define CSI2RX_INT_MSK_DPHY_FATAL 0xe4
+#define CSI2RX_INT_MSK_DPHY_FATAL_ERR_SOT_LANE0 BIT(0)
+#define CSI2RX_INT_MSK_DPHY_FATAL_ERR_SOT_LANE1 BIT(1)
+
+/* Force for Fatal Interruption Caused by PHY */
+#define CSI2RX_INT_FORCE_DPHY_FATAL 0xe8
+
+/* Fatal Interruption Caused During Packet Construction */
+#define CSI2RX_INT_ST_PKT_FATAL 0xf0
+#define CSI2RX_INT_ST_PKT_FATAL_ERR_ECC BIT(0)
+#define CSI2RX_INT_ST_PKT_FATAL_ERR_PAYLOAD BIT(1)
+
+/* Mask for Fatal Interruption Caused During Packet Construction */
+#define CSI2RX_INT_MSK_PKT_FATAL 0xf4
+#define CSI2RX_INT_MSK_PKT_FATAL_ERR_ECC BIT(0)
+#define CSI2RX_INT_MSK_PKT_FATAL_ERR_PAYLOAD BIT(1)
+
+/* Force for Fatal Interruption Caused During Packet Construction */
+#define CSI2RX_INT_FORCE_PKT_FATAL 0xf8
+
+/* Interruption Caused by PHY */
+#define CSI2RX_INT_ST_DPHY 0x110
+#define CSI2RX_INT_ST_DPHY_ERR_SOT_LANE0 BIT(0)
+#define CSI2RX_INT_ST_DPHY_ERR_SOT_LANE1 BIT(1)
+#define CSI2RX_INT_ST_DPHY_ERR_ESC_LANE0 BIT(16)
+#define CSI2RX_INT_ST_DPHY_ERR_ESC_LANE1 BIT(17)
+
+/* Mask for Interruption Caused by PHY */
+#define CSI2RX_INT_MSK_DPHY 0x114
+#define CSI2RX_INT_MSK_DPHY_SOT_ERR_LANE0 BIT(0)
+#define CSI2RX_INT_MSK_DPHY_SOT_ERR_LANE1 BIT(1)
+#define CSI2RX_INT_MSK_DPHY_ESC_ERR_LANE0 BIT(16)
+#define CSI2RX_INT_MSK_DPHY_ESC_ERR_LANE1 BIT(17)
+
+/* Force for Interruption Caused by PHY */
+#define CSI2RX_INT_FORCE_DPHY 0x118
+
+/* Fatal Interruption Caused by IPI Interface */
+#define CSI2RX_INT_ST_IPI_FATAL 0x140
+#define CSI2RX_INT_ST_IPI_FATAL_ERR_IFFIFO_UNDERFLOW BIT(0)
+#define CSI2RX_INT_ST_IPI_FATAL_ERR_IFFIFO_OVERFLOW BIT(1)
+#define CSI2RX_INT_ST_IPI_FATAL_ERR_FRAME_SYNC BIT(2)
+#define CSI2RX_INT_ST_IPI_FATAL_ERR_FIFO_NOT_EMPTY BIT(3)
+#define CSI2RX_INT_ST_IPI_FATAL_ERR_HLINE_TIME BIT(4)
+#define CSI2RX_INT_ST_IPI_FATAL_ERR_FIFO_OVERFLOW BIT(5)
+#define CSI2RX_INT_ST_IPI_FATAL_ERR_PD_FIFO_OVERFLOW BIT(6)
+
+/* Mask for Fatal Interruption Caused by IPI Interface */
+#define CSI2RX_INT_MSK_IPI_FATAL 0x144
+#define CSI2RX_INT_MSK_IPI_FATAL_ERR_IFFIFO_UNDERFLOW BIT(0)
+#define CSI2RX_INT_MSK_IPI_FATAL_ERR_IFFIFO_OVERFLOW BIT(1)
+#define CSI2RX_INT_MSK_IPI_FATAL_ERR_FRAME_SYNC BIT(2)
+#define CSI2RX_INT_MSK_IPI_FATAL_ERR_FIFO_NOT_EMPTY BIT(3)
+#define CSI2RX_INT_MSK_IPI_FATAL_ERR_HLINE_TIME BIT(4)
+#define CSI2RX_INT_MSK_IPI_FATAL_ERR_FIFO_OVERFLOW BIT(5)
+#define CSI2RX_INT_MSK_IPI_FATAL_ERR_PD_FIFO_OVERFLOW BIT(6)
+
+/* Force for Fatal Interruption Caused by IPI Interface */
+#define CSI2RX_INT_FORCE_IPI_FATAL 0x148
+
+/* Data De-Scrambling */
+#define CSI2RX_SCRAMBLING 0x300
+
+/* De-scrambler Seed for Lane 1 */
+#define CSI2RX_SCRAMBLING_SEED1 0x304
+
+/* De-scrambler Seed for Lane 2 */
+#define CSI2RX_SCRAMBLING_SEED2 0x308
+
+#define DWC_CSI2RX_PAD_SINK 0
+#define DWC_CSI2RX_PAD_SOURCE 1
+#define DWC_CSI2RX_PADS_NUM 2
+
+#define DWC_CSI2RX_DEF_MBUS_CODE MEDIA_BUS_FMT_UYVY8_1X16
+#define DWC_CSI2RX_DEF_PIX_WIDTH 1920U
+#define DWC_CSI2RX_DEF_PIX_HEIGHT 1080U
+#define DWC_CSI2RX_MAX_PIX_WIDTH 0xffff
+#define DWC_CSI2RX_MAX_PIX_HEIGHT 0xffff
+
+struct dwc_csi_event {
+ u32 mask;
+ const char * const name;
+ unsigned int counter;
+};
+
+static const struct dwc_csi_event dwc_events[] = {
+ { CSI2RX_INT_ST_MAIN_FATAL_ERR_IPI, "IPI Interface Fatal Error" },
+ { CSI2RX_INT_ST_MAIN_ERR_PHY, "PHY Error" },
+ { CSI2RX_INT_ST_MAIN_ERR_ECC, "Header Single Bit Error" },
+ { CSI2RX_INT_ST_MAIN_ERR_DID, "Data ID Error" },
+ { CSI2RX_INT_ST_MAIN_FATAL_ERR_PLD_CRC, "Payload CRC Fatal Error" },
+ { CSI2RX_INT_ST_MAIN_FATAL_ERR_CRC_FRAME, "Frame CRC Fatal Error" },
+ { CSI2RX_INT_ST_MAIN_FATAL_ERR_SEQ_FRAME, "Frame Sequence Fatal Error" },
+ { CSI2RX_INT_ST_MAIN_FATAL_ERR_BNDRY_FRAMEL, "Frame Boundaries Fatal Error" },
+ { CSI2RX_INT_ST_MAIN_FATAL_ERR_PKT, "Packet Construction Fatal Error" },
+ { CSI2RX_INT_ST_MAIN_FATAL_ERR_PHY, "PHY Fatal Error" },
+};
+
+#define DWC_NUM_EVENTS ARRAY_SIZE(dwc_events)
+#define DWC_EVENT_MASK 0x500ff
+
+struct dwc_csi_pix_format {
+ u32 code;
+ u32 output;
+ u32 data_type;
+ u8 width;
+};
+
+struct dwc_csi_device {
+ struct device *dev;
+ void __iomem *regs;
+ struct phy *phy;
+ struct clk_bulk_data *clks;
+ int num_clks;
+ struct v4l2_subdev sd;
+ struct v4l2_async_notifier notifier;
+ struct v4l2_subdev *source_sd;
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct media_pad pads[DWC_CSI2RX_PADS_NUM];
+ u16 remote_pad;
+
+ struct v4l2_mbus_config_mipi_csi2 bus;
+ u32 cfgclkfreqrange;
+ u32 hsfreqrange;
+ u64 enabled_streams;
+
+ /* Use driver mutex lock for the ctrl lock */
+ struct mutex lock;
+
+ struct dwc_csi_event events[DWC_NUM_EVENTS];
+ const struct dwc_csi_pix_format *csi_fmt;
+
+ /* Used for pattern generator */
+ bool pg_enable;
+ enum {
+ PATTERN_DISABLED,
+ PATTERN_VERTICAL,
+ PATTERN_HORIZONTAL,
+ } pg_pattern;
+};
+
+/* List of supported pixel formats for the subdev */
+static const struct dwc_csi_pix_format dwc_csi_formats[] = {
+ /* YUV formats */
+ {
+ .code = MEDIA_BUS_FMT_UYVY8_1X16,
+ .output = MEDIA_BUS_FMT_UYVY8_1X16,
+ .data_type = MIPI_CSI2_DT_YUV422_8B,
+ .width = 16,
+ },
+ /* RGB formats */
+ {
+ .code = MEDIA_BUS_FMT_RGB565_1X16,
+ .output = MEDIA_BUS_FMT_RGB565_1X16,
+ .data_type = MIPI_CSI2_DT_RGB565,
+ .width = 16,
+ }, {
+ .code = MEDIA_BUS_FMT_BGR888_1X24,
+ .output = MEDIA_BUS_FMT_RGB888_1X24,
+ .data_type = MIPI_CSI2_DT_RGB888,
+ .width = 24,
+ },
+ /* RAW (Bayer and greyscale) formats. */
+ {
+ .code = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .output = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .data_type = MIPI_CSI2_DT_RAW8,
+ .width = 8,
+ }, {
+ .code = MEDIA_BUS_FMT_SGBRG8_1X8,
+ .output = MEDIA_BUS_FMT_SGBRG8_1X8,
+ .data_type = MIPI_CSI2_DT_RAW8,
+ .width = 8,
+ }, {
+ .code = MEDIA_BUS_FMT_SGRBG8_1X8,
+ .output = MEDIA_BUS_FMT_SGRBG8_1X8,
+ .data_type = MIPI_CSI2_DT_RAW8,
+ .width = 8,
+ }, {
+ .code = MEDIA_BUS_FMT_SRGGB8_1X8,
+ .output = MEDIA_BUS_FMT_SRGGB8_1X8,
+ .data_type = MIPI_CSI2_DT_RAW8,
+ .width = 8,
+ }, {
+ .code = MEDIA_BUS_FMT_Y8_1X8,
+ .output = MEDIA_BUS_FMT_Y8_1X8,
+ .data_type = MIPI_CSI2_DT_RAW8,
+ .width = 8,
+ }, {
+ .code = MEDIA_BUS_FMT_SBGGR10_1X10,
+ .output = MEDIA_BUS_FMT_SBGGR10_1X10,
+ .data_type = MIPI_CSI2_DT_RAW10,
+ .width = 10,
+ }, {
+ .code = MEDIA_BUS_FMT_SGBRG10_1X10,
+ .output = MEDIA_BUS_FMT_SGBRG10_1X10,
+ .data_type = MIPI_CSI2_DT_RAW10,
+ .width = 10,
+ }, {
+ .code = MEDIA_BUS_FMT_SGRBG10_1X10,
+ .output = MEDIA_BUS_FMT_SGRBG10_1X10,
+ .data_type = MIPI_CSI2_DT_RAW10,
+ .width = 10,
+ }, {
+ .code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .output = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .data_type = MIPI_CSI2_DT_RAW10,
+ .width = 10,
+ }, {
+ .code = MEDIA_BUS_FMT_Y10_1X10,
+ .output = MEDIA_BUS_FMT_Y10_1X10,
+ .data_type = MIPI_CSI2_DT_RAW10,
+ .width = 10,
+ }, {
+ .code = MEDIA_BUS_FMT_SBGGR12_1X12,
+ .output = MEDIA_BUS_FMT_SBGGR12_1X12,
+ .data_type = MIPI_CSI2_DT_RAW12,
+ .width = 12,
+ }, {
+ .code = MEDIA_BUS_FMT_SGBRG12_1X12,
+ .output = MEDIA_BUS_FMT_SGBRG12_1X12,
+ .data_type = MIPI_CSI2_DT_RAW12,
+ .width = 12,
+ }, {
+ .code = MEDIA_BUS_FMT_SGRBG12_1X12,
+ .output = MEDIA_BUS_FMT_SGRBG12_1X12,
+ .data_type = MIPI_CSI2_DT_RAW12,
+ .width = 12,
+ }, {
+ .code = MEDIA_BUS_FMT_SRGGB12_1X12,
+ .output = MEDIA_BUS_FMT_SRGGB12_1X12,
+ .data_type = MIPI_CSI2_DT_RAW12,
+ .width = 12,
+ }, {
+ .code = MEDIA_BUS_FMT_Y12_1X12,
+ .output = MEDIA_BUS_FMT_Y12_1X12,
+ .data_type = MIPI_CSI2_DT_RAW12,
+ .width = 12,
+ }, {
+ .code = MEDIA_BUS_FMT_SBGGR14_1X14,
+ .output = MEDIA_BUS_FMT_SBGGR14_1X14,
+ .data_type = MIPI_CSI2_DT_RAW14,
+ .width = 14,
+ }, {
+ .code = MEDIA_BUS_FMT_SGBRG14_1X14,
+ .output = MEDIA_BUS_FMT_SGBRG14_1X14,
+ .data_type = MIPI_CSI2_DT_RAW14,
+ .width = 14,
+ }, {
+ .code = MEDIA_BUS_FMT_SGRBG14_1X14,
+ .output = MEDIA_BUS_FMT_SGRBG14_1X14,
+ .data_type = MIPI_CSI2_DT_RAW14,
+ .width = 14,
+ }, {
+ .code = MEDIA_BUS_FMT_SRGGB14_1X14,
+ .output = MEDIA_BUS_FMT_SRGGB14_1X14,
+ .data_type = MIPI_CSI2_DT_RAW14,
+ .width = 14,
+ }, {
+ .code = MEDIA_BUS_FMT_SBGGR16_1X16,
+ .output = MEDIA_BUS_FMT_SBGGR16_1X16,
+ .data_type = MIPI_CSI2_DT_RAW16,
+ .width = 16,
+ }, {
+ .code = MEDIA_BUS_FMT_SGBRG16_1X16,
+ .output = MEDIA_BUS_FMT_SGBRG16_1X16,
+ .data_type = MIPI_CSI2_DT_RAW16,
+ .width = 16,
+ }, {
+ .code = MEDIA_BUS_FMT_SGRBG16_1X16,
+ .output = MEDIA_BUS_FMT_SGRBG16_1X16,
+ .data_type = MIPI_CSI2_DT_RAW16,
+ .width = 16,
+ }, {
+ .code = MEDIA_BUS_FMT_SRGGB16_1X16,
+ .output = MEDIA_BUS_FMT_SRGGB16_1X16,
+ .data_type = MIPI_CSI2_DT_RAW16,
+ .width = 16,
+ }
+};
+
+static const struct v4l2_mbus_framefmt dwc_csi_default_fmt = {
+ .code = DWC_CSI2RX_DEF_MBUS_CODE,
+ .width = DWC_CSI2RX_DEF_PIX_WIDTH,
+ .height = DWC_CSI2RX_DEF_PIX_HEIGHT,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_SMPTE170M,
+ .xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(V4L2_COLORSPACE_SMPTE170M),
+ .ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(V4L2_COLORSPACE_SMPTE170M),
+ .quantization = V4L2_QUANTIZATION_LIM_RANGE,
+};
+
+static const struct dwc_csi_pix_format *find_csi_format(u32 code)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(dwc_csi_formats); i++)
+ if (code == dwc_csi_formats[i].code)
+ return &dwc_csi_formats[i];
+
+ return &dwc_csi_formats[0];
+}
+
+static inline void dwc_csi_write(struct dwc_csi_device *csidev, unsigned int offset, u32 val)
+{
+ writel(val, csidev->regs + offset);
+}
+
+static inline u32 dwc_csi_read(struct dwc_csi_device *csidev, unsigned int offset)
+{
+ return readl(csidev->regs + offset);
+}
+
+/*
+ * DWC MIPI CSI-2 Host Controller Hardware operation
+ */
+static int dwc_csi_device_pg_enable(struct dwc_csi_device *csidev)
+{
+ const struct dwc_csi_pix_format *csi_fmt = csidev->csi_fmt;
+ struct v4l2_subdev *sd = &csidev->sd;
+ struct v4l2_subdev_state *state;
+ struct v4l2_mbus_framefmt *fmt;
+ u32 val;
+
+ if (!csidev->pg_enable)
+ return 0;
+
+ if (!csi_fmt) {
+ dev_err(csidev->dev, "CSI pixel format is NULL\n");
+ return -EINVAL;
+ }
+
+ if (csi_fmt->data_type != MIPI_CSI2_DT_RGB888) {
+ dev_err(csidev->dev, "Pattern generator only support RGB888\n");
+ return -EINVAL;
+ }
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+ /* Pattern generator create data stream only according to stream 0 */
+ fmt = v4l2_subdev_state_get_format(state, DWC_CSI2RX_PAD_SINK, 0);
+
+ val = CSI2RX_PPI_PG_PATTERN_HRES_HRES(fmt->width);
+ dwc_csi_write(csidev, CSI2RX_PPI_PG_PATTERN_HRES, val);
+
+ val = CSI2RX_PPI_PG_PATTERN_VRES_VRES(fmt->height);
+ dwc_csi_write(csidev, CSI2RX_PPI_PG_PATTERN_VRES, val);
+
+ val = CSI2RX_PPI_PG_CONFIG_DATA_TYPE(csi_fmt->data_type);
+ val |= CSI2RX_PPI_PG_CONFIG_VIR_CHAN(0);
+ val |= CSI2RX_PPI_PG_CONFIG_PG_MODE(csidev->pg_pattern);
+ dwc_csi_write(csidev, CSI2RX_PPI_PG_CONFIG, val);
+
+ /*
+ * Select line start packets to construct vertical
+ * timing information for IPI interface
+ */
+ val = CSI2RX_IPI_ADV_FEATURES_SYNC_EVENT_MODE;
+ val |= CSI2RX_IPI_ADV_FEATURES_SYNC_LS_PKT;
+ val |= CSI2RX_IPI_ADV_FEATURES_LINE_EVENT_SEL;
+ dwc_csi_write(csidev, CSI2RX_IPI_ADV_FEATURES, val);
+
+ val = CSI2RX_PPI_PG_ENABLE_EN;
+ dwc_csi_write(csidev, CSI2RX_PPI_PG_ENABLE, val);
+
+ v4l2_subdev_unlock_state(state);
+
+ return 0;
+}
+
+static void dwc_csi_device_pg_disable(struct dwc_csi_device *csidev)
+{
+ dwc_csi_write(csidev, CSI2RX_PPI_PG_ENABLE, 0);
+}
+
+static void dwc_csi_ipi_enable(struct dwc_csi_device *csidev)
+{
+ u32 val;
+
+ /* Memory is automatically flushed at each Frame Start */
+ val = CSI2RX_IPI_MEM_FLUSH_AUTO;
+ dwc_csi_write(csidev, CSI2RX_IPI_MEM_FLUSH, val);
+
+ /* Enable IPI */
+ val = dwc_csi_read(csidev, CSI2RX_IPI_MODE);
+ val |= CSI2RX_IPI_MODE_ENABLE;
+ dwc_csi_write(csidev, CSI2RX_IPI_MODE, val);
+}
+
+static void dwc_csi_ipi_disable(struct dwc_csi_device *csidev)
+{
+ dwc_csi_write(csidev, CSI2RX_IPI_MODE, 0);
+}
+
+static void dwc_csi_device_ipi_config(struct dwc_csi_device *csidev)
+{
+ const struct dwc_csi_pix_format *csi_fmt = csidev->csi_fmt;
+ u32 val;
+
+ /* Do IPI soft reset */
+ dwc_csi_write(csidev, CSI2RX_IPI_SOFTRSTN, 0x0);
+ dwc_csi_write(csidev, CSI2RX_IPI_SOFTRSTN, 0x1);
+
+ /* Select virtual channel and data type to be processed by IPI */
+ val = CSI2RX_IPI_DATA_TYPE_DT(csi_fmt->data_type);
+ dwc_csi_write(csidev, CSI2RX_IPI_DATA_TYPE, val);
+
+ /* Set virtual channel 0 as default */
+ val = CSI2RX_IPI_VCID_VC(0);
+ dwc_csi_write(csidev, CSI2RX_IPI_VCID, val);
+
+ /*
+ * Select IPI camera timing mode and allow the pixel stream
+ * to be non-continuous when pixel interface FIFO is empty
+ */
+ val = dwc_csi_read(csidev, CSI2RX_IPI_MODE);
+ val &= ~CSI2RX_IPI_MODE_CONTROLLER;
+ val &= ~CSI2RX_IPI_MODE_COLOR_MODE16;
+ val |= CSI2RX_IPI_MODE_CUT_THROUGH;
+ dwc_csi_write(csidev, CSI2RX_IPI_MODE, val);
+}
+
+static void dwc_csi_device_reset(struct dwc_csi_device *csidev)
+{
+ /* Reset mipi csi host, active low */
+ dwc_csi_write(csidev, CSI2RX_HOST_RESETN, 0);
+ dwc_csi_write(csidev, CSI2RX_HOST_RESETN, 1);
+}
+
+static void dwc_csi_device_startup(struct dwc_csi_device *csidev)
+{
+ /* Release DWC_mipi_csi2_host from reset */
+ dwc_csi_device_reset(csidev);
+
+ phy_init(csidev->phy);
+
+ phy_reset(csidev->phy);
+}
+
+static int dwc_csi_get_dphy_configuration(struct dwc_csi_device *csidev,
+ union phy_configure_opts *opts)
+{
+ struct phy_configure_opts_mipi_dphy *cfg = &opts->mipi_dphy;
+ struct v4l2_subdev *source = csidev->source_sd;
+ s64 link_freq;
+
+ link_freq = v4l2_get_link_freq(source->ctrl_handler,
+ csidev->csi_fmt->width,
+ csidev->bus.num_data_lanes * 2);
+ if (link_freq < 0) {
+ dev_err(csidev->dev, "Unable to obtain link frequency: %d\n",
+ (int)link_freq);
+ return link_freq;
+ }
+
+ memset(cfg, 0x0, sizeof(*cfg));
+ cfg->hs_clk_rate = link_freq * 2;
+ cfg->lanes = csidev->bus.num_data_lanes;
+
+ return 0;
+}
+
+static void dwc_csi_dphy_prep(struct dwc_csi_device *csidev)
+{
+ u32 val;
+
+ /* Release synopsis DPHY test codes from reset */
+ dwc_csi_write(csidev, CSI2RX_DPHY_RSTZ, 0x0);
+ dwc_csi_write(csidev, CSI2RX_DPHY_SHUTDOWNZ, 0x0);
+
+ val = dwc_csi_read(csidev, CSI2RX_DPHY_TEST_CTRL0);
+ val &= ~CSI2RX_DPHY_TEST_CTRL0_TEST_CLR;
+ dwc_csi_write(csidev, CSI2RX_DPHY_TEST_CTRL0, val);
+
+ /*
+ * ndelay is not necessary have MMIO operation, need dummy read to make
+ * sure above write reach target.
+ */
+ dwc_csi_read(csidev, CSI2RX_DPHY_TEST_CTRL0);
+ /* Wait for at least 15ns */
+ ndelay(15);
+
+ val = dwc_csi_read(csidev, CSI2RX_DPHY_TEST_CTRL0);
+ val |= CSI2RX_DPHY_TEST_CTRL0_TEST_CLR;
+ dwc_csi_write(csidev, CSI2RX_DPHY_TEST_CTRL0, val);
+}
+
+static void dwc_csi_dphy_release_reset(struct dwc_csi_device *csidev)
+{
+ /* Release PHY from reset */
+ dwc_csi_write(csidev, CSI2RX_DPHY_SHUTDOWNZ, 0x1);
+ /*
+ * ndelay is not necessary have MMIO operation, need dummy read to make
+ * sure above write reach target.
+ */
+ dwc_csi_read(csidev, CSI2RX_DPHY_SHUTDOWNZ);
+ ndelay(5);
+ dwc_csi_write(csidev, CSI2RX_DPHY_RSTZ, 0x1);
+ dwc_csi_read(csidev, CSI2RX_DPHY_RSTZ);
+ ndelay(5);
+}
+
+static int dwc_csi_device_init(struct dwc_csi_device *csidev)
+{
+ struct device *dev = csidev->dev;
+ union phy_configure_opts opts;
+ u32 phy_stopstate;
+ u32 val;
+ int ret;
+
+ ret = dwc_csi_get_dphy_configuration(csidev, &opts);
+ if (ret)
+ return ret;
+
+ ret = phy_set_mode(csidev->phy, PHY_MODE_MIPI_DPHY);
+ if (ret)
+ return ret;
+
+ ret = phy_configure(csidev->phy, &opts);
+ if (ret)
+ return ret;
+
+ dwc_csi_write(csidev, CSI2RX_HOST_RESETN, 0);
+ dwc_csi_dphy_prep(csidev);
+ dwc_csi_write(csidev, CSI2RX_N_LANES, CSI2RX_N_LANES_N_LANES(opts.mipi_dphy.lanes));
+ ret = phy_power_on(csidev->phy);
+ dwc_csi_dphy_release_reset(csidev);
+ dwc_csi_write(csidev, CSI2RX_HOST_RESETN, 0x1);
+
+ if (ret)
+ return ret;
+
+ /* Check if lanes are in stop state */
+ phy_stopstate = CSI2RX_DPHY_STOPSTATE_CLK_LANE;
+ phy_stopstate |= GENMASK(csidev->bus.num_data_lanes - 1, 0);
+ ret = readl_poll_timeout(csidev->regs + CSI2RX_DPHY_STOPSTATE,
+ val, (val & phy_stopstate) != phy_stopstate,
+ 10, 10000);
+ if (ret) {
+ dev_err(dev, "Lanes are not in stop state(%#x)\n", val);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void dwc_csi_device_hs_rx_start(struct dwc_csi_device *csidev)
+{
+ dwc_csi_ipi_enable(csidev);
+}
+
+static int dwc_csi_device_hs_rx_stop(struct dwc_csi_device *csidev)
+{
+ struct device *dev = csidev->dev;
+ u32 val;
+
+ phy_power_off(csidev->phy);
+ phy_exit(csidev->phy);
+ dwc_csi_ipi_disable(csidev);
+
+ /* Check clock lanes are not in High Speed Mode */
+ val = dwc_csi_read(csidev, CSI2RX_DPHY_RX_STATUS);
+ if (val & CSI2RX_DPHY_RX_STATUS_CLK_LANE_HS) {
+ dev_err(dev, "Clock lanes are still in HS mode\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void dwc_csi_device_enable_interrupts(struct dwc_csi_device *csidev, bool on)
+{
+ /* Define errors to be enabled */
+ dwc_csi_write(csidev, CSI2RX_INT_MSK_DPHY_FATAL, on ? 0x3 : 0);
+ dwc_csi_write(csidev, CSI2RX_INT_MSK_PKT_FATAL, on ? 0x3 : 0);
+ dwc_csi_write(csidev, CSI2RX_INT_MSK_DPHY, on ? 0x30003 : 0);
+ dwc_csi_write(csidev, CSI2RX_INT_MSK_IPI_FATAL, on ? 0x7f : 0);
+}
+
+static void dwc_csi_clear_counters(struct dwc_csi_device *csidev)
+{
+ unsigned int i;
+
+ for (i = 0; i < DWC_NUM_EVENTS; ++i)
+ csidev->events[i].counter = 0;
+}
+
+static void dwc_csi_log_counters(struct dwc_csi_device *csidev)
+{
+ unsigned int i;
+ int counter;
+
+ for (i = 0; i < DWC_NUM_EVENTS; ++i) {
+ counter = csidev->events[i].counter;
+ if (counter > 0)
+ dev_info(csidev->dev, "%s events: %d\n",
+ csidev->events[i].name,
+ counter);
+ }
+}
+
+static void dwc_csi_dump_regs(struct dwc_csi_device *csidev)
+{
+#define DWC_MIPI_CSIS_DEBUG_REG(name) {name, #name}
+ static const struct {
+ u32 offset;
+ const char * const name;
+ } registers[] = {
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_VERSION),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_N_LANES),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_HOST_RESETN),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_INT_ST_MAIN),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DATA_IDS_1_DT),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DATA_IDS_2_DT),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DATA_IDS_1_VC),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DATA_IDS_2_VC),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DPHY_SHUTDOWNZ),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DPHY_RSTZ),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DPHY_RX_STATUS),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DPHY_STOPSTATE),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DPHY_TEST_CTRL0),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_DPHY_TEST_CTRL1),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_PPI_PG_PATTERN_VRES),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_PPI_PG_PATTERN_HRES),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_PPI_PG_CONFIG),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_PPI_PG_ENABLE),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_PPI_PG_STATUS),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_IPI_MODE),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_IPI_VCID),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_IPI_DATA_TYPE),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_IPI_MEM_FLUSH),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_IPI_SOFTRSTN),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_IPI_ADV_FEATURES),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_INT_ST_DPHY_FATAL),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_INT_ST_PKT_FATAL),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_INT_ST_DPHY_FATAL),
+ DWC_MIPI_CSIS_DEBUG_REG(CSI2RX_INT_ST_IPI_FATAL),
+ };
+
+ unsigned int i;
+ u32 cfg;
+
+ dev_dbg(csidev->dev, "--- REGISTERS ---\n");
+
+ for (i = 0; i < ARRAY_SIZE(registers); i++) {
+ cfg = dwc_csi_read(csidev, registers[i].offset);
+ dev_dbg(csidev->dev, "%14s[0x%02x]: 0x%08x\n",
+ registers[i].name, registers[i].offset, cfg);
+ }
+}
+
+/*
+ * V4L2 subdev operations
+ */
+
+static inline struct dwc_csi_device *
+sd_to_dwc_csi_device(struct v4l2_subdev *sdev)
+{
+ return container_of(sdev, struct dwc_csi_device, sd);
+}
+
+static int __dwc_csi_subdev_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_krouting *routing)
+{
+ int ret;
+
+ if (routing->num_routes > V4L2_FRAME_DESC_ENTRY_MAX)
+ return -EINVAL;
+
+ ret = v4l2_subdev_routing_validate(sd, routing,
+ V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
+ if (ret)
+ return ret;
+
+ return v4l2_subdev_set_routing_with_fmt(sd, state, routing,
+ &dwc_csi_default_fmt);
+}
+
+static int dwc_csi_subdev_init_state(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state)
+{
+ struct v4l2_subdev_route routes[] = {
+ {
+ .sink_pad = DWC_CSI2RX_PAD_SINK,
+ .sink_stream = 0,
+ .source_pad = DWC_CSI2RX_PAD_SOURCE,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ };
+
+ struct v4l2_subdev_krouting routing = {
+ .num_routes = ARRAY_SIZE(routes),
+ .routes = routes,
+ };
+
+ return __dwc_csi_subdev_set_routing(sd, sd_state, &routing);
+}
+
+static int dwc_csi_subdev_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ /*
+ * The CSIS can't transcode in any way, the source format is identical
+ * to the sink format.
+ */
+ if (code->pad == DWC_CSI2RX_PAD_SOURCE) {
+ struct v4l2_mbus_framefmt *fmt;
+
+ if (code->index > 0)
+ return -EINVAL;
+
+ fmt = v4l2_subdev_state_get_format(sd_state, code->pad,
+ code->stream);
+ code->code = fmt->code;
+ return 0;
+ }
+
+ if (code->index >= ARRAY_SIZE(dwc_csi_formats))
+ return -EINVAL;
+
+ code->code = dwc_csi_formats[code->index].code;
+
+ return 0;
+}
+
+static int dwc_csi_subdev_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *sdformat)
+{
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+ struct dwc_csi_pix_format const *csi_fmt;
+ struct v4l2_mbus_framefmt *fmt;
+ unsigned int align;
+
+ /*
+ * The CSIS can't transcode in any way, the source format can't be
+ * modified.
+ */
+ if (sdformat->pad == DWC_CSI2RX_PAD_SOURCE)
+ return v4l2_subdev_get_fmt(sd, sd_state, sdformat);
+
+ /*
+ * Validate the media bus code and clamp and align the size.
+ *
+ * The total number of bits per line must be a multiple of 8. We thus
+ * need to align the width for formats that are not multiples of 8
+ * bits.
+ */
+ csi_fmt = find_csi_format(sdformat->format.code);
+
+ switch (csi_fmt->width % 8) {
+ case 0:
+ align = 0;
+ break;
+ case 4:
+ align = 1;
+ break;
+ case 2:
+ case 6:
+ align = 2;
+ break;
+ default:
+ /* 1, 3, 5, 7 */
+ align = 3;
+ break;
+ }
+
+ v4l_bound_align_image(&sdformat->format.width, 1,
+ DWC_CSI2RX_MAX_PIX_WIDTH, align,
+ &sdformat->format.height, 1,
+ DWC_CSI2RX_MAX_PIX_HEIGHT, 0, 0);
+
+ fmt = v4l2_subdev_state_get_format(sd_state, sdformat->pad,
+ sdformat->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = sdformat->format;
+
+ /* Set default code if user set an invalid value */
+ fmt->code = csi_fmt->code;
+
+ /* Propagate the format from sink stream to source stream */
+ fmt = v4l2_subdev_state_get_opposite_stream_format(sd_state, sdformat->pad,
+ sdformat->stream);
+ if (!fmt)
+ return -EINVAL;
+
+ *fmt = sdformat->format;
+ /* The format on the source pad might change due to unpacking. */
+ fmt->code = csi_fmt->output;
+
+ /* Store the CSIS format descriptor for active formats. */
+ if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ csidev->csi_fmt = csi_fmt;
+
+ return 0;
+}
+
+static int dwc_csi_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+ struct v4l2_mbus_frame_desc *fd)
+{
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+ struct v4l2_mbus_frame_desc source_fd;
+ struct v4l2_subdev_route *route;
+ struct v4l2_subdev_state *state;
+ int ret;
+
+ if (pad != DWC_CSI2RX_PAD_SOURCE)
+ return -EINVAL;
+
+ memset(fd, 0, sizeof(*fd));
+
+ ret = v4l2_subdev_call(csidev->source_sd, pad, get_frame_desc,
+ csidev->remote_pad, &source_fd);
+ if (ret < 0) {
+ dev_info(csidev->dev,
+ "Remote sub-device on pad %d should implement .get_frame_desc! Forcing VC = 0 and DT = %x\n",
+ pad, csidev->csi_fmt->data_type);
+ fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+ fd->num_entries = 1;
+ fd->entry[0].pixelcode = csidev->csi_fmt->code;
+ fd->entry[0].bus.csi2.vc = 0;
+ fd->entry[0].bus.csi2.dt = csidev->csi_fmt->data_type;
+
+ return 0;
+ }
+
+ fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+
+ state = v4l2_subdev_lock_and_get_active_state(sd);
+
+ for_each_active_route(&state->routing, route) {
+ struct v4l2_mbus_frame_desc_entry *entry = NULL;
+ unsigned int i;
+
+ if (route->source_pad != pad)
+ continue;
+
+ for (i = 0; i < source_fd.num_entries; ++i) {
+ if (source_fd.entry[i].stream == route->sink_stream) {
+ entry = &source_fd.entry[i];
+ break;
+ }
+ }
+
+ if (!entry) {
+ dev_err(csidev->dev,
+ "Failed to find stream from source frames desc\n");
+ ret = -EPIPE;
+ goto out_unlock;
+ }
+
+ fd->entry[fd->num_entries].stream = route->source_stream;
+ fd->entry[fd->num_entries].flags = entry->flags;
+ fd->entry[fd->num_entries].length = entry->length;
+ fd->entry[fd->num_entries].pixelcode = entry->pixelcode;
+ fd->entry[fd->num_entries].bus.csi2.vc = entry->bus.csi2.vc;
+ fd->entry[fd->num_entries].bus.csi2.dt = entry->bus.csi2.dt;
+
+ fd->num_entries++;
+ }
+
+out_unlock:
+ v4l2_subdev_unlock_state(state);
+ return ret;
+}
+
+static int dwc_csi_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ enum v4l2_subdev_format_whence which,
+ struct v4l2_subdev_krouting *routing)
+{
+ if (which == V4L2_SUBDEV_FORMAT_ACTIVE &&
+ media_entity_is_streaming(&sd->entity))
+ return -EBUSY;
+
+ return __dwc_csi_subdev_set_routing(sd, state, routing);
+}
+
+static int dwc_csi_start_stream(struct dwc_csi_device *csidev)
+{
+ int ret;
+
+ dwc_csi_device_startup(csidev);
+
+ ret = dwc_csi_device_init(csidev);
+ if (ret)
+ return ret;
+
+ dwc_csi_device_ipi_config(csidev);
+
+ ret = dwc_csi_device_pg_enable(csidev);
+ if (ret)
+ return ret;
+
+ dwc_csi_device_hs_rx_start(csidev);
+
+ dwc_csi_device_enable_interrupts(csidev, true);
+
+ return 0;
+}
+
+static void dwc_csi_stop_stream(struct dwc_csi_device *csidev)
+{
+ dwc_csi_device_enable_interrupts(csidev, false);
+ dwc_csi_device_hs_rx_stop(csidev);
+ dwc_csi_device_pg_disable(csidev);
+}
+
+static int dwc_csi_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+ u64 sink_streams;
+ int ret;
+
+ if (!csidev->source_sd) {
+ dev_err(csidev->dev, "Sensor don't link with CSIS pad\n");
+ return -EPIPE;
+ }
+
+ if (!csidev->enabled_streams) {
+ ret = pm_runtime_resume_and_get(csidev->dev);
+ if (ret < 0)
+ return ret;
+
+ ret = v4l2_ctrl_handler_setup(&csidev->ctrl_handler);
+ if (ret < 0)
+ goto err_runtime_put;
+
+ dwc_csi_clear_counters(csidev);
+
+ ret = dwc_csi_start_stream(csidev);
+ if (ret < 0)
+ goto err_runtime_put;
+
+ dwc_csi_dump_regs(csidev);
+ dwc_csi_log_counters(csidev);
+ }
+
+ sink_streams = v4l2_subdev_state_xlate_streams(state, DWC_CSI2RX_PAD_SOURCE,
+ DWC_CSI2RX_PAD_SINK,
+ &streams_mask);
+
+ dev_dbg(csidev->dev, "remote sd: %s pad: %u, sink_stream:0x%llx\n",
+ csidev->source_sd->name, csidev->remote_pad, sink_streams);
+
+ ret = v4l2_subdev_enable_streams(csidev->source_sd, csidev->remote_pad,
+ sink_streams);
+ if (ret)
+ return ret;
+
+ csidev->enabled_streams |= streams_mask;
+
+ return 0;
+
+err_runtime_put:
+ pm_runtime_put(csidev->dev);
+ return ret;
+}
+
+static int dwc_csi_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+ u64 sink_streams;
+ int ret;
+
+ sink_streams = v4l2_subdev_state_xlate_streams(state, DWC_CSI2RX_PAD_SOURCE,
+ DWC_CSI2RX_PAD_SINK,
+ &streams_mask);
+
+ ret = v4l2_subdev_disable_streams(csidev->source_sd, csidev->remote_pad,
+ sink_streams);
+ if (ret)
+ return ret;
+
+ csidev->enabled_streams &= ~streams_mask;
+
+ if (!csidev->enabled_streams) {
+ dwc_csi_stop_stream(csidev);
+ dwc_csi_log_counters(csidev);
+ pm_runtime_put(csidev->dev);
+ }
+
+ return 0;
+}
+
+static int dwc_csi_subdev_log_status(struct v4l2_subdev *sd)
+{
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+
+ dwc_csi_log_counters(csidev);
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops dwc_csi_subdev_core_ops = {
+ .log_status = dwc_csi_subdev_log_status,
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_pad_ops dwc_csi_subdev_pad_ops = {
+ .enum_mbus_code = dwc_csi_subdev_enum_mbus_code,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = dwc_csi_subdev_set_fmt,
+ .get_frame_desc = dwc_csi_get_frame_desc,
+ .set_routing = dwc_csi_set_routing,
+ .enable_streams = dwc_csi_enable_streams,
+ .disable_streams = dwc_csi_disable_streams,
+};
+
+static const struct v4l2_subdev_ops dwc_csi_subdev_ops = {
+ .core = &dwc_csi_subdev_core_ops,
+ .pad = &dwc_csi_subdev_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops dwc_csi_internal_ops = {
+ .init_state = dwc_csi_subdev_init_state,
+};
+
+/*
+ * Media entity operations
+ */
+
+static int dwc_csi_link_setup(struct media_entity *entity,
+ const struct media_pad *local_pad,
+ const struct media_pad *remote_pad, u32 flags)
+{
+ struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+ struct v4l2_subdev *remote_sd;
+
+ dev_dbg(csidev->dev, "link setup %s -> %s", remote_pad->entity->name,
+ local_pad->entity->name);
+
+ /* We only care about the link to the source. */
+ if (!(local_pad->flags & MEDIA_PAD_FL_SINK))
+ return 0;
+
+ remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
+
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (csidev->source_sd)
+ return -EBUSY;
+
+ csidev->source_sd = remote_sd;
+ csidev->remote_pad = remote_pad->index;
+ } else {
+ csidev->source_sd = NULL;
+ }
+
+ return 0;
+}
+
+static int dwc_csi_link_validate(struct media_link *link)
+{
+ struct media_pad *sink_pad = link->sink;
+ struct v4l2_subdev *sink_sd;
+ struct dwc_csi_device *csidev;
+
+ sink_sd = media_entity_to_v4l2_subdev(sink_pad->entity);
+ csidev = sd_to_dwc_csi_device(sink_sd);
+
+ dev_dbg(csidev->dev, "entity name:%s pad index=%d\n",
+ sink_sd->name, sink_pad->index);
+
+ /*
+ * Skip link validate when pattern enabled since the source
+ * data will be from CSI pattern generator, not sensor.
+ */
+ if (csidev->pg_enable && sink_pad->index == DWC_CSI2RX_PAD_SINK)
+ return 0;
+
+ return v4l2_subdev_link_validate(link);
+}
+
+static const struct media_entity_operations dwc_csi_entity_ops = {
+ .link_setup = dwc_csi_link_setup,
+ .link_validate = dwc_csi_link_validate,
+ .get_fwnode_pad = v4l2_subdev_get_fwnode_pad_1_to_1,
+};
+
+/*
+ * Async subdev notifier
+ */
+
+static inline struct dwc_csi_device *
+notifier_to_dwc_csi_device(struct v4l2_async_notifier *n)
+{
+ return container_of(n, struct dwc_csi_device, notifier);
+}
+
+static int dwc_csi_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *sd,
+ struct v4l2_async_connection *asd)
+{
+ struct dwc_csi_device *csidev = notifier_to_dwc_csi_device(notifier);
+ struct media_pad *sink = &csidev->sd.entity.pads[DWC_CSI2RX_PAD_SINK];
+
+ return v4l2_create_fwnode_links_to_pad(sd, sink, 0);
+}
+
+static const struct v4l2_async_notifier_operations dwc_csi_notify_ops = {
+ .bound = dwc_csi_notify_bound,
+};
+
+static int dwc_csi_async_register(struct dwc_csi_device *csidev)
+{
+ struct v4l2_fwnode_endpoint vep = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY,
+ };
+ struct v4l2_async_connection *asd;
+ struct fwnode_handle *ep;
+ unsigned int i;
+ int ret;
+
+ v4l2_async_subdev_nf_init(&csidev->notifier, &csidev->sd);
+
+ ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(csidev->dev), 0, 0,
+ FWNODE_GRAPH_ENDPOINT_NEXT);
+ if (!ep)
+ return -ENOTCONN;
+
+ ret = v4l2_fwnode_endpoint_parse(ep, &vep);
+ if (ret)
+ goto err_parse;
+
+ for (i = 0; i < vep.bus.mipi_csi2.num_data_lanes; ++i) {
+ if (vep.bus.mipi_csi2.data_lanes[i] != i + 1) {
+ dev_err(csidev->dev,
+ "data lanes reordering is not supported");
+ ret = -EINVAL;
+ goto err_parse;
+ }
+ }
+
+ csidev->bus = vep.bus.mipi_csi2;
+
+ dev_dbg(csidev->dev, "data lanes: %d\n", csidev->bus.num_data_lanes);
+ dev_dbg(csidev->dev, "flags: 0x%08x\n", csidev->bus.flags);
+
+ asd = v4l2_async_nf_add_fwnode_remote(&csidev->notifier, ep,
+ struct v4l2_async_connection);
+ if (IS_ERR(asd)) {
+ ret = PTR_ERR(asd);
+ goto err_parse;
+ }
+
+ fwnode_handle_put(ep);
+
+ csidev->notifier.ops = &dwc_csi_notify_ops;
+
+ ret = v4l2_async_nf_register(&csidev->notifier);
+ if (ret)
+ goto err_notifier_clean;
+
+ ret = v4l2_async_register_subdev(&csidev->sd);
+ if (ret)
+ goto err_unreg_notifier;
+
+ return ret;
+
+err_unreg_notifier:
+ v4l2_async_nf_unregister(&csidev->notifier);
+err_notifier_clean:
+ v4l2_async_nf_cleanup(&csidev->notifier);
+err_parse:
+ fwnode_handle_put(ep);
+ return ret;
+}
+
+/*
+ * Pattern Generator Controller operations
+ */
+
+static const char * const test_pattern_menu[] = {
+ "Disabled",
+ "Vertical Color Bars",
+ "Horizontal Color Bars",
+};
+
+static inline struct dwc_csi_device *ctrl_to_csidev(struct v4l2_ctrl *ctrl)
+{
+ return container_of(ctrl->handler, struct dwc_csi_device, ctrl_handler);
+}
+
+static int dwc_csi_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct dwc_csi_device *csidev = ctrl_to_csidev(ctrl);
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_TEST_PATTERN:
+ /* Pattern index start from 0 */
+ csidev->pg_pattern = ctrl->val - 1;
+ csidev->pg_enable = (ctrl->val) ? true : false;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops dwc_csi_ctrl_ops = {
+ .s_ctrl = dwc_csi_s_ctrl,
+};
+
+static int dwc_csi_controls_init(struct dwc_csi_device *csidev)
+{
+ struct v4l2_ctrl_handler *handler = &csidev->ctrl_handler;
+ int ret;
+
+ v4l2_ctrl_handler_init(handler, 1);
+
+ /* Use driver mutex lock for the ctrl lock */
+ handler->lock = &csidev->lock;
+
+ v4l2_ctrl_new_std_menu_items(handler, &dwc_csi_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(test_pattern_menu) - 1,
+ 0, 0, test_pattern_menu);
+
+ if (handler->error) {
+ ret = handler->error;
+ v4l2_ctrl_handler_free(handler);
+ return ret;
+ }
+
+ csidev->sd.ctrl_handler = handler;
+ return 0;
+}
+
+static void dwc_csi_controls_cleanup(void *data)
+{
+ struct dwc_csi_device *csidev = data;
+
+ v4l2_ctrl_handler_free(&csidev->ctrl_handler);
+}
+
+/*
+ * Suspend/resume
+ */
+
+static int dwc_csi_system_suspend(struct device *dev)
+{
+ return pm_runtime_force_suspend(dev);
+}
+
+static int dwc_csi_system_resume(struct device *dev)
+{
+ int ret;
+
+ ret = pm_runtime_force_resume(dev);
+ if (ret < 0) {
+ dev_err(dev, "force resume %s failed!\n", dev_name(dev));
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dwc_csi_runtime_suspend(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+
+ clk_bulk_disable_unprepare(csidev->num_clks, csidev->clks);
+
+ return 0;
+}
+
+static int dwc_csi_runtime_resume(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+
+ return clk_bulk_prepare_enable(csidev->num_clks, csidev->clks);
+}
+
+static const struct dev_pm_ops dwc_csi_device_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(dwc_csi_system_suspend, dwc_csi_system_resume)
+ SET_RUNTIME_PM_OPS(dwc_csi_runtime_suspend, dwc_csi_runtime_resume, NULL)
+};
+
+static irqreturn_t dwc_csi_irq_handler(int irq, void *priv)
+{
+ struct dwc_csi_device *csidev = priv;
+ u32 status;
+ int i;
+
+ /* Hardware auto clean after read */
+ status = dwc_csi_read(csidev, CSI2RX_INT_ST_MAIN);
+
+ if (status & DWC_EVENT_MASK) {
+ for (i = 0; i < DWC_NUM_EVENTS; ++i) {
+ struct dwc_csi_event *event = &csidev->events[i];
+
+ if (status & event->mask)
+ event->counter++;
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static inline void dwc_csi_param_init(struct dwc_csi_device *csidev)
+{
+ csidev->csi_fmt = &dwc_csi_formats[0];
+}
+
+static int dwc_csi_subdev_init(struct dwc_csi_device *csidev)
+{
+ struct v4l2_subdev *sd = &csidev->sd;
+ int ret;
+
+ v4l2_subdev_init(sd, &dwc_csi_subdev_ops);
+ sd->owner = THIS_MODULE;
+ snprintf(sd->name, sizeof(sd->name), "csidev-%s", dev_name(csidev->dev));
+ sd->internal_ops = &dwc_csi_internal_ops;
+
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+ V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_STREAMS;
+ sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ sd->entity.ops = &dwc_csi_entity_ops;
+
+ sd->dev = csidev->dev;
+
+ csidev->pads[DWC_CSI2RX_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ csidev->pads[DWC_CSI2RX_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+
+ ret = media_entity_pads_init(&csidev->sd.entity, DWC_CSI2RX_PADS_NUM,
+ csidev->pads);
+ if (ret) {
+ dev_err(csidev->dev, "Failed to init pads\n");
+ return ret;
+ }
+
+ ret = v4l2_subdev_init_finalize(sd);
+ if (ret)
+ media_entity_cleanup(&sd->entity);
+
+ return ret;
+}
+
+static void dwc_csi_subdev_cleanup(void *data)
+{
+ struct dwc_csi_device *csidev = data;
+
+ v4l2_subdev_cleanup(&csidev->sd);
+ media_entity_cleanup(&csidev->sd.entity);
+}
+
+static int dwc_csi_device_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct dwc_csi_device *csidev;
+ int irq;
+ int ret;
+
+ csidev = devm_kzalloc(dev, sizeof(*csidev), GFP_KERNEL);
+ if (!csidev)
+ return -ENOMEM;
+
+ mutex_init(&csidev->lock);
+
+ csidev->dev = dev;
+ memcpy(csidev->events, dwc_events, sizeof(dwc_events));
+
+ csidev->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(csidev->regs)) {
+ dev_err(dev, "Failed to get DWC csi2 register map\n");
+ return PTR_ERR(csidev->regs);
+ }
+
+ csidev->phy = devm_phy_get(dev, "rx");
+ if (IS_ERR(csidev->phy))
+ return dev_err_probe(dev, PTR_ERR(csidev->phy),
+ "Failed to get DPHY Rx\n");
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return dev_err_probe(dev, irq, "Failed to get IRQ\n");
+
+ ret = devm_request_irq(dev, irq, dwc_csi_irq_handler, 0,
+ dev_name(dev), csidev);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "Failed to request IRQ\n");
+
+ csidev->num_clks = devm_clk_bulk_get_all(dev, &csidev->clks);
+
+ dwc_csi_param_init(csidev);
+
+ ret = dwc_csi_subdev_init(csidev);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "Failed to initialize subdev\n");
+
+ ret = devm_add_action_or_reset(dev, dwc_csi_subdev_cleanup, csidev);
+ if (ret)
+ return ret;
+
+ ret = dwc_csi_controls_init(csidev);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to initialize controls\n");
+
+ ret = devm_add_action_or_reset(dev, dwc_csi_controls_cleanup, csidev);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, &csidev->sd);
+
+ ret = dwc_csi_async_register(csidev);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "Async register failed\n");
+
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static void dwc_csi_device_remove(struct platform_device *pdev)
+{
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct dwc_csi_device *csidev = sd_to_dwc_csi_device(sd);
+
+ v4l2_async_nf_unregister(&csidev->notifier);
+ v4l2_async_nf_cleanup(&csidev->notifier);
+ v4l2_async_unregister_subdev(&csidev->sd);
+
+ pm_runtime_disable(&pdev->dev);
+
+ fwnode_handle_put(csidev->sd.fwnode);
+ mutex_destroy(&csidev->lock);
+
+ pm_runtime_set_suspended(&pdev->dev);
+}
+
+static const struct of_device_id dwc_csi_device_of_match[] = {
+ { .compatible = "snps,dw-mipi-csi2-v150" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, dwc_csi_device_of_match);
+
+static struct platform_driver dwc_csi_device_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "dwc-mipi-csi2",
+ .of_match_table = dwc_csi_device_of_match,
+ .pm = &dwc_csi_device_pm_ops,
+ },
+ .probe = dwc_csi_device_probe,
+ .remove = dwc_csi_device_remove,
+};
+
+module_platform_driver(dwc_csi_device_driver);
+
+MODULE_DESCRIPTION("DesignWare Core MIPI CSI2 driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform: dwc-mipi-csi2");
+MODULE_AUTHOR("NXP Semiconductor, Inc.");
--
2.34.1
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