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Message-Id: <20250403-hm1246-v1-2-30990d71bc42@emfend.at>
Date: Thu, 03 Apr 2025 10:07:36 +0200
From: Matthias Fend <matthias.fend@...end.at>
To: Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, Matthias Fend <matthias.fend@...end.at>,
bsp-development.geo@...ca-geosystems.com
Subject: [PATCH 2/2] media: i2c: add Himax HM1246 image sensor driver
Add a V4L2 sub-device driver for Himax HM1246 image sensor.
The Himax HM1246-AWD is a 1/3.7-Inch CMOS image sensor SoC with an active
array size of 1296 x 976. It is programmable through an I2C interface and
connected via parallel bus.
The sensor has an internal ISP with a complete image processing pipeline
including control loops. However, this driver uses the sensor in raw mode
and the entire ISP is bypassed.
Signed-off-by: Matthias Fend <matthias.fend@...end.at>
---
MAINTAINERS | 8 +
drivers/media/i2c/Kconfig | 9 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/hm1246.c | 1417 ++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1435 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index d32ce85c5c6685345236889def2d86df50ff4665..90c798667d3e4de7ff40b8df7f57289ac45e879d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10614,6 +10614,14 @@ L: linux-kernel@...r.kernel.org
S: Maintained
F: drivers/misc/hisi_hikey_usb.c
+HIMAX HM1246 SENSOR DRIVER
+M: Matthias Fend <matthias.fend@...end.at>
+L: linux-media@...r.kernel.org
+S: Maintained
+T: git git://linuxtv.org/media_tree.git
+F: Documentation/devicetree/bindings/media/i2c/himax,hm1246.yaml
+F: drivers/media/i2c/hm1246.c
+
HIMAX HX83112B TOUCHSCREEN SUPPORT
M: Job Noorman <job@...rman.info>
L: linux-input@...r.kernel.org
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index e576b213084d232e90b7e556a7a855a3bb95544c..b862f88053f20fd445ffbd93887174fdd6cbfbe6 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -127,6 +127,15 @@ config VIDEO_HI847
To compile this driver as a module, choose M here: the
module will be called hi847.
+config VIDEO_HM1246
+ tristate "Himax HM1246 sensor support"
+ help
+ This is a Video4Linux2 sensor driver for the Himax
+ HM1246 camera.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hm1246.
+
config VIDEO_IMX208
tristate "Sony IMX208 sensor support"
help
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 6c23a4463527cf762032df663bbfe26be29018c8..9a3bf03c0a4de318294be70bcffc7df713fe7ef9 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -44,6 +44,7 @@ obj-$(CONFIG_VIDEO_GC2145) += gc2145.o
obj-$(CONFIG_VIDEO_HI556) += hi556.o
obj-$(CONFIG_VIDEO_HI846) += hi846.o
obj-$(CONFIG_VIDEO_HI847) += hi847.o
+obj-$(CONFIG_VIDEO_HM1246) += hm1246.o
obj-$(CONFIG_VIDEO_I2C) += video-i2c.o
obj-$(CONFIG_VIDEO_IMX208) += imx208.o
obj-$(CONFIG_VIDEO_IMX214) += imx214.o
diff --git a/drivers/media/i2c/hm1246.c b/drivers/media/i2c/hm1246.c
new file mode 100644
index 0000000000000000000000000000000000000000..a46c6905e643db5ba7063fa8845b1f02bcef46fc
--- /dev/null
+++ b/drivers/media/i2c/hm1246.c
@@ -0,0 +1,1417 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Himax HM1246 image sensor
+ *
+ * Copyright 2025 Matthias Fend <matthias.fend@...end.at>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/units.h>
+#include <media/v4l2-cci.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+
+/* Status registers */
+#define HM1246_MODEL_ID_REG CCI_REG16(0x0000)
+
+/* General setup registers */
+#define HM1246_MODE_SELECT_REG CCI_REG8(0x0100)
+#define HM1246_MODE_SELECT_STANDBY 0x00
+#define HM1246_MODE_SELECT_STREAM 0x01
+#define HM1246_MODE_SELECT_STOP 0x02
+#define HM1246_IMAGE_ORIENTATION_REG CCI_REG8(0x0101)
+#define HM1246_IMAGE_ORIENTATION_VFLIP BIT(1)
+#define HM1246_IMAGE_ORIENTATION_HFLIP BIT(0)
+#define HM1246_CMU_UPDATE_REG CCI_REG8(0x0104)
+
+/* Output setup registers */
+#define HM1246_COARSE_INTG_REG CCI_REG16(0x0202)
+#define HM1246_ANALOG_GLOBAL_GAIN_REG CCI_REG8(0x0205)
+
+/* Clock setup registers */
+#define HM1246_PLL1CFG_REG CCI_REG8(0x0303)
+#define HM1246_PLL1CFG_MULTIPLIER(x) (((x) & 0xFF) << 0)
+#define HM1246_PLL2CFG_REG CCI_REG8(0x0305)
+#define HM1246_PLL2CFG_PRE_DIV(x) (((x) & 0x1F) << 1)
+#define HM1246_PLL2CFG_MULTIPLIER(x) (((x) & 0x01) << 0)
+#define HM1246_PLL3CFG_REG CCI_REG8(0x0307)
+#define HM1246_PLL3CFG_POST_DIV(x) (((x) & 0x3) << 6)
+#define HM1246_PLL3CFG_SYSCLK_DIV(x) (((x) & 0x3) << 4)
+#define HM1246_PLL3CFG_PCLK_DIV(x) (((x) & 0x7) << 0)
+
+/* Frame timing registers */
+#define HM1246_FRAME_LENGTH_LINES_REG CCI_REG16(0x0340)
+#define HM1246_LINE_LENGTH_PCK_REG CCI_REG16(0x0342)
+
+/* Image size registers */
+#define HM1246_X_ADDR_START_REG CCI_REG16(0x0344)
+#define HM1246_Y_ADDR_START_REG CCI_REG16(0x0346)
+#define HM1246_X_ADDR_END_REG CCI_REG16(0x0348)
+#define HM1246_Y_ADDR_END_REG CCI_REG16(0x034A)
+#define HM1246_X_LA_START_REG CCI_REG16(0x0351)
+#define HM1246_X_LA_END_REG CCI_REG16(0x0353)
+#define HM1246_Y_LA_START_REG CCI_REG16(0x0355)
+#define HM1246_Y_LA_END_REG CCI_REG16(0x0357)
+
+/* Test pattern registers */
+#define HM1246_TEST_PATTERN_MODE_REG CCI_REG8(0x0601)
+#define HM1246_TEST_PATTERN_MODE_MODE(x) (((x) & 0xF) << 4)
+#define HM1246_TEST_PATTERN_MODE_ENABLE BIT(0)
+#define HM1246_TEST_DATA_BLUE_REG CCI_REG16(0x0602)
+#define HM1246_TEST_DATA_GB_REG CCI_REG16(0x0604)
+#define HM1246_TEST_DATA_RED_REG CCI_REG16(0x0606)
+#define HM1246_TEST_DATA_GR_REG CCI_REG16(0x0608)
+
+/* SBC registers */
+#define HM1246_SBC_BOOT_REF2_REG CCI_REG8(0x2001)
+#define HM1246_SBC_BOOT_REF2_PLL_LOCK BIT(4)
+#define HM1246_SBC_CTRL_REG CCI_REG8(0x2003)
+#define HM1246_SBC_CTRL_PLL_EN BIT(0)
+
+/* System registers */
+#define HM1246_OUTPUT_PRT_CTRL_REG CCI_REG8(0x2F02)
+#define HM1246_POLARITY_CTRL_REG CCI_REG8(0x2F20)
+#define HM1246_POLARITY_CTRL_HSYNC BIT(7)
+#define HM1246_POLARITY_CTRL_VSYNC BIT(6)
+#define HM1246_PCLK_CTRL_REG CCI_REG8(0x2F24)
+#define HM1246_PCLK_CTRL_POL BIT(3)
+
+/* Digital window control & parameter registers */
+#define HM1246_DWIN_XOFFSET_REG CCI_REG16(0xD5E4)
+#define HM1246_DWIN_XSIZE_REG CCI_REG16(0xD5E6)
+#define HM1246_DWIN_YOFFSET_REG CCI_REG16(0xD5E8)
+#define HM1246_DWIN_YSIZE_REG CCI_REG16(0xD5EA)
+
+#define HM1246_MODEL_ID 0x1245
+
+#define HM1246_NATIVE_WIDTH 1296
+#define HM1246_NATIVE_HEIGHT 976
+
+#define HM1246_VTS_MAX 65535
+
+#define HM1246_COARSE_INTG_MARGIN 2
+#define HM1246_COARSE_INTG_MIN 4
+#define HM1246_COARSE_INTG_STEP 1
+
+#define HM1246_ANALOG_GLOBAL_GAIN_MIN 0x00
+#define HM1246_ANALOG_GLOBAL_GAIN_MAX 0xE8
+#define HM1246_ANALOG_GLOBAL_GAIN_STEP 1
+
+#define HM1246_XCLK_MIN (6 * HZ_PER_MHZ)
+#define HM1246_XCLK_MAX (27 * HZ_PER_MHZ)
+
+#define HM1246_PCLK_MIN (8 * HZ_PER_MHZ)
+#define HM1246_PCLK_MAX (96 * HZ_PER_MHZ)
+
+#define HM1246_PLL_VCO_MIN 360000000
+#define HM1246_PLL_VCO_MAX 680000000
+
+#define HM1246_PLL_INCLK_MIN 1000000
+#define HM1246_PLL_INCLK_MAX 2500000
+
+#define HM1246_PLL_MULTI_L_MIN 1
+#define HM1246_PLL_MULTI_L_MAX 256
+
+#define HM1246_PLL_MULTI_H_MIN 2
+#define HM1246_PLL_MULTI_H_MAX 3
+
+#define HM1246_PLL_MULTI_MIN \
+ (HM1246_PLL_MULTI_H_MIN * HM1246_PLL_MULTI_L_MIN)
+#define HM1246_PLL_MULTI_MAX \
+ (HM1246_PLL_MULTI_H_MAX * HM1246_PLL_MULTI_L_MAX)
+
+static const char *const hm1246_test_pattern_menu[] = {
+ "Disabled",
+ "Checkboard",
+ "Ramp",
+ "Moving ones",
+ "Blending color bars",
+ "Color bars",
+ "Solid white",
+ "Solid black",
+ "Solid red",
+ "Solid green",
+ "Solid blue",
+};
+
+static const s64 hm1246_link_freqs[] = {
+ 42174000, /* 1420x990 @ 30Hz (RAW) */
+};
+
+static const char *const hm1246_supply_names[] = {
+ "avdd",
+ "iovdd",
+ "dvdd",
+};
+
+struct hm1246 {
+ struct device *dev;
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+
+ struct regulator_bulk_data supplies[ARRAY_SIZE(hm1246_supply_names)];
+ struct clk *xclk;
+ unsigned long xclk_freq;
+ struct gpio_desc *reset_gpio;
+ unsigned int mbus_flags;
+
+ struct v4l2_ctrl_handler ctrls;
+ struct v4l2_ctrl *pixel_rate_ctrl;
+ struct v4l2_ctrl *link_freq_ctrl;
+ struct v4l2_ctrl *exposure_ctrl;
+ struct v4l2_ctrl *vblank_ctrl;
+ struct v4l2_ctrl *hblank_ctrl;
+ struct v4l2_ctrl *hflip_ctrl;
+ struct v4l2_ctrl *vflip_ctrl;
+
+ struct regmap *regmap;
+
+ bool identified;
+ const struct hm1246_mode *cur_mode;
+};
+
+static const struct cci_reg_sequence mode_1296x976_raw[] = {
+ { HM1246_X_LA_START_REG, 60 },
+ { HM1246_X_LA_END_REG, 1355 },
+ { HM1246_Y_LA_START_REG, 0 },
+ { HM1246_Y_LA_END_REG, 975 },
+ { HM1246_OUTPUT_PRT_CTRL_REG, 0x20 },
+ { CCI_REG8(0x300A), 0x01 },
+ { CCI_REG8(0x300B), 0x00 },
+ { CCI_REG8(0x50F5), 0x01 },
+ { CCI_REG8(0x50DD), 0x00 },
+ { CCI_REG8(0x50A1), 0x02 },
+ { CCI_REG8(0x50AA), 0x1C },
+ { CCI_REG8(0x50AC), 0xDD },
+ { CCI_REG8(0x50AD), 0x08 },
+ { CCI_REG8(0x50AB), 0x04 },
+ { CCI_REG8(0x50A0), 0x40 },
+ { CCI_REG8(0x50A2), 0x12 },
+ { CCI_REG8(0x50AE), 0x30 },
+ { CCI_REG8(0x50B3), 0x04 },
+ { CCI_REG8(0x5200), 0x04 },
+ { CCI_REG8(0x5204), 0x40 },
+ { CCI_REG8(0x5208), 0x55 },
+ { CCI_REG8(0x5209), 0x06 },
+ { CCI_REG8(0x520B), 0x05 },
+ { CCI_REG8(0x520D), 0x40 },
+ { CCI_REG8(0x5214), 0x18 },
+ { CCI_REG8(0x5215), 0x0F },
+ { CCI_REG8(0x5217), 0x01 },
+ { CCI_REG8(0x5218), 0x07 },
+ { CCI_REG8(0x5219), 0x01 },
+ { CCI_REG8(0x521A), 0x50 },
+ { CCI_REG8(0x521B), 0x24 },
+ { CCI_REG8(0x5232), 0x01 },
+ { CCI_REG8(0x5220), 0x11 },
+ { CCI_REG8(0x5227), 0x01 },
+ { CCI_REG8(0x5106), 0xC1 },
+ { CCI_REG8(0x5115), 0xC0 },
+ { CCI_REG8(0x5116), 0xC1 },
+ { CCI_REG8(0x5138), 0x40 },
+ { CCI_REG8(0x5139), 0x60 },
+ { CCI_REG8(0x513A), 0x80 },
+ { CCI_REG8(0x513B), 0xA0 },
+ { CCI_REG8(0x513C), 0xA1 },
+ { CCI_REG8(0x513D), 0xA2 },
+ { CCI_REG8(0x513E), 0xA3 },
+ { CCI_REG8(0x5140), 0x40 },
+ { CCI_REG8(0x5141), 0x60 },
+ { CCI_REG8(0x5142), 0x80 },
+ { CCI_REG8(0x5143), 0x81 },
+ { CCI_REG8(0x5144), 0x82 },
+ { CCI_REG8(0x5145), 0x83 },
+ { CCI_REG8(0x5146), 0x93 },
+ { CCI_REG8(0x51C1), 0xC3 },
+ { CCI_REG8(0x51C5), 0xC3 },
+ { CCI_REG8(0x51C9), 0xC3 },
+ { CCI_REG8(0x51CD), 0xC2 },
+ { CCI_REG8(0x51D1), 0xC1 },
+ { CCI_REG8(0x51D5), 0xC1 },
+ { CCI_REG8(0x51D9), 0x81 },
+ { CCI_REG8(0x51DD), 0x81 },
+ { CCI_REG8(0x51C2), 0x49 },
+ { CCI_REG8(0x51C6), 0x49 },
+ { CCI_REG8(0x51CA), 0x49 },
+ { CCI_REG8(0x51CE), 0x49 },
+ { CCI_REG8(0x51D2), 0x49 },
+ { CCI_REG8(0x51D6), 0x59 },
+ { CCI_REG8(0x51DA), 0x59 },
+ { CCI_REG8(0x51DE), 0x59 },
+ { CCI_REG8(0x51C3), 0x20 },
+ { CCI_REG8(0x51C7), 0x38 },
+ { CCI_REG8(0x51CB), 0x21 },
+ { CCI_REG8(0x51CF), 0x11 },
+ { CCI_REG8(0x51D3), 0x11 },
+ { CCI_REG8(0x51D7), 0x13 },
+ { CCI_REG8(0x51DB), 0x13 },
+ { CCI_REG8(0x51DF), 0x13 },
+ { CCI_REG8(0x51E0), 0x03 },
+ { CCI_REG8(0x51E2), 0x03 },
+ { CCI_REG8(0x51F0), 0x42 },
+ { CCI_REG8(0x51F1), 0x40 },
+ { CCI_REG8(0x51F2), 0x4A },
+ { CCI_REG8(0x51F3), 0x48 },
+ { CCI_REG8(0x5015), 0x73 },
+ { CCI_REG8(0x504A), 0x04 },
+ { CCI_REG8(0x5044), 0x07 },
+ { CCI_REG8(0x5040), 0x03 },
+ { CCI_REG8(0x5135), 0xC4 },
+ { CCI_REG8(0x5136), 0xC5 },
+ { CCI_REG8(0x5166), 0xC4 },
+ { CCI_REG8(0x5196), 0xC4 },
+ { CCI_REG8(0x51C0), 0x10 },
+ { CCI_REG8(0x51C4), 0x10 },
+ { CCI_REG8(0x51C8), 0xA0 },
+ { CCI_REG8(0x51CC), 0xA0 },
+ { CCI_REG8(0x51D0), 0xA1 },
+ { CCI_REG8(0x51D4), 0xA5 },
+ { CCI_REG8(0x51D8), 0xA5 },
+ { CCI_REG8(0x51DC), 0xA5 },
+ { CCI_REG8(0x5200), 0xE4 },
+ { CCI_REG8(0x5209), 0x04 },
+ { CCI_REG8(0x301B), 0x01 },
+ { CCI_REG8(0x3130), 0x01 },
+ { CCI_REG8(0x5013), 0x07 },
+ { CCI_REG8(0x5016), 0x01 },
+ { CCI_REG8(0x501D), 0x50 },
+ { CCI_REG8(0x0350), 0xFE },
+ { CCI_REG8(0x0343), 0x8C },
+ { CCI_REG8(0x2F03), 0x15 },
+ { CCI_REG8(0xD380), 0x00 },
+ { CCI_REG8(0x3047), 0x7F },
+ { CCI_REG8(0x304D), 0x34 },
+ { CCI_REG8(0x3041), 0x4B },
+ { CCI_REG8(0x3042), 0x2D },
+ { CCI_REG8(0x3056), 0x64 },
+ { CCI_REG8(0x3059), 0x1E },
+ { CCI_REG8(0x305E), 0x10 },
+ { CCI_REG8(0x305F), 0x10 },
+ { CCI_REG8(0x306D), 0x10 },
+ { CCI_REG8(0x306E), 0x0C },
+ { CCI_REG8(0x3064), 0x50 },
+ { CCI_REG8(0x3067), 0x78 },
+ { CCI_REG8(0x3068), 0x4B },
+ { CCI_REG8(0x306A), 0x78 },
+ { CCI_REG8(0x306B), 0x4B },
+ { CCI_REG8(0xD442), 0x3D },
+ { CCI_REG8(0xD443), 0x06 },
+ { CCI_REG8(0xD440), 0x63 },
+ { CCI_REG8(0xD446), 0xB0 },
+ { CCI_REG8(0xD447), 0x60 },
+ { CCI_REG8(0xD448), 0x48 },
+ { CCI_REG8(0xD449), 0x30 },
+ { CCI_REG8(0xD44A), 0x18 },
+ { CCI_REG8(0xD360), 0x03 },
+ { CCI_REG8(0x30AC), 0x10 },
+ { CCI_REG8(0x30AD), 0x10 },
+ { CCI_REG8(0x30AE), 0x10 },
+ { CCI_REG8(0x3040), 0x0B },
+ { CCI_REG8(0x2002), 0x00 },
+ { CCI_REG8(0x2000), 0x08 },
+};
+
+struct hm1246_reg_list {
+ u32 num_of_regs;
+ const struct cci_reg_sequence *regs;
+};
+
+struct hm1246_mode {
+ u32 codes[4];
+ u32 link_freq_index;
+ u32 clocks_per_pixel;
+ u32 top;
+ u32 left;
+ u32 width;
+ u32 height;
+ u32 hts;
+ u32 vts_min;
+ const struct hm1246_reg_list reg_list;
+};
+
+#define FLIP_FORMAT_INDEX(v, h) ((v ? 2 : 0) | (h ? 1 : 0))
+
+/* Get the format code of the mode considering current flip setting. */
+static u32 hm1246_get_format_code(struct hm1246 *hm1246,
+ const struct hm1246_mode *hm1246_mode)
+{
+ return hm1246_mode->codes[FLIP_FORMAT_INDEX(hm1246->vflip_ctrl->val,
+ hm1246->hflip_ctrl->val)];
+}
+
+static const struct hm1246_mode hm1246_modes[] = {
+ {
+ .codes = {
+ [FLIP_FORMAT_INDEX(0, 0)] = MEDIA_BUS_FMT_SBGGR10_1X10,
+ [FLIP_FORMAT_INDEX(0, 1)] = MEDIA_BUS_FMT_SGBRG10_1X10,
+ [FLIP_FORMAT_INDEX(1, 0)] = MEDIA_BUS_FMT_SGRBG10_1X10,
+ [FLIP_FORMAT_INDEX(1, 1)] = MEDIA_BUS_FMT_SRGGB10_1X10,
+ },
+ .link_freq_index = 0,
+ .clocks_per_pixel = 1,
+ .top = 0,
+ .left = 0,
+ .width = 1296,
+ .height = 976,
+ .hts = 1420,
+ .vts_min = 990,
+ .reg_list = {
+ .num_of_regs = ARRAY_SIZE(mode_1296x976_raw),
+ .regs = mode_1296x976_raw,
+ },
+ },
+};
+
+static inline struct hm1246 *to_hm1246(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct hm1246, sd);
+}
+
+static const struct hm1246_mode *
+hm1246_find_mode_by_mbus_code(struct hm1246 *hm1246, u32 code)
+{
+ for (int i = 0; i < ARRAY_SIZE(hm1246_modes); i++) {
+ if (code == hm1246_get_format_code(hm1246, &hm1246_modes[i]))
+ return &hm1246_modes[i];
+ }
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int hm1246_power_on(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct hm1246 *hm1246 = to_hm1246(sd);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(hm1246_supply_names),
+ hm1246->supplies);
+ if (ret) {
+ dev_err(hm1246->dev, "failed to enable regulators\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(hm1246->xclk);
+ if (ret) {
+ regulator_bulk_disable(ARRAY_SIZE(hm1246_supply_names),
+ hm1246->supplies);
+ dev_err(hm1246->dev, "failed to enable clock\n");
+ return ret;
+ }
+
+ gpiod_set_value_cansleep(hm1246->reset_gpio, 0);
+
+ /*
+ * XSHUTDOWN to crystal clock oscillation: tcrystal typ. 650us
+ * Sample bootstrap pin: tsample max. 2000us
+ * Built in self test: tbist max. 3000us
+ */
+ fsleep(6000);
+
+ return 0;
+}
+
+static int hm1246_power_off(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct hm1246 *hm1246 = to_hm1246(sd);
+
+ gpiod_set_value_cansleep(hm1246->reset_gpio, 1);
+
+ clk_disable_unprepare(hm1246->xclk);
+
+ regulator_bulk_disable(ARRAY_SIZE(hm1246_supply_names),
+ hm1246->supplies);
+
+ return 0;
+}
+
+static int hm1246_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct hm1246 *hm1246 = to_hm1246(sd);
+
+ if (code->index >= ARRAY_SIZE(hm1246_modes))
+ return -EINVAL;
+
+ code->code = hm1246_get_format_code(hm1246, &hm1246_modes[code->index]);
+
+ return 0;
+}
+
+static int hm1246_enum_frame_size(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct hm1246 *hm1246 = to_hm1246(subdev);
+ const struct hm1246_mode *mode = NULL;
+
+ if (fse->index > 0)
+ return -EINVAL;
+
+ mode = hm1246_find_mode_by_mbus_code(hm1246, fse->code);
+ if (IS_ERR(mode))
+ return PTR_ERR(mode);
+
+ fse->min_width = mode->width;
+ fse->max_width = mode->width;
+ fse->min_height = mode->height;
+ fse->max_height = mode->height;
+
+ return 0;
+}
+
+static int hm1246_update_controls(struct hm1246 *hm1246,
+ const struct hm1246_mode *mode)
+{
+ s64 pixel_rate, exposure_max, vblank, hblank;
+ int ret;
+
+ ret = __v4l2_ctrl_s_ctrl(hm1246->link_freq_ctrl, mode->link_freq_index);
+ if (ret) {
+ dev_err(hm1246->dev, "link_freq ctrl range update failed\n");
+ return ret;
+ }
+
+ pixel_rate = hm1246_link_freqs[mode->link_freq_index] /
+ mode->clocks_per_pixel;
+ ret = __v4l2_ctrl_modify_range(hm1246->pixel_rate_ctrl, pixel_rate,
+ pixel_rate, 1, pixel_rate);
+ if (ret) {
+ dev_err(hm1246->dev, "pixel_rate ctrl range update failed\n");
+ return ret;
+ }
+
+ vblank = mode->vts_min - mode->height,
+ ret = __v4l2_ctrl_modify_range(hm1246->vblank_ctrl, vblank,
+ HM1246_VTS_MAX - mode->height, 1,
+ vblank);
+ if (ret) {
+ dev_err(hm1246->dev, "vblank ctrl range update failed\n");
+ return ret;
+ }
+
+ hblank = mode->hts - mode->width;
+ ret = __v4l2_ctrl_modify_range(hm1246->hblank_ctrl, hblank, hblank, 1,
+ hblank);
+ if (ret) {
+ dev_err(hm1246->dev, "hblank ctrl range update failed\n");
+ return ret;
+ }
+
+ exposure_max = mode->vts_min - HM1246_COARSE_INTG_MARGIN;
+ ret = __v4l2_ctrl_modify_range(hm1246->exposure_ctrl,
+ HM1246_COARSE_INTG_MIN, exposure_max,
+ HM1246_COARSE_INTG_STEP, exposure_max);
+ if (ret) {
+ dev_err(hm1246->dev, "exposure ctrl range update failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void hm1246_update_pad_format(struct hm1246 *hm1246,
+ const struct hm1246_mode *hm1246_mode,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ fmt->width = hm1246_mode->width;
+ fmt->height = hm1246_mode->height;
+ fmt->code = hm1246_get_format_code(hm1246, hm1246_mode);
+ fmt->field = V4L2_FIELD_NONE;
+ fmt->colorspace = V4L2_COLORSPACE_RAW;
+ fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
+ fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
+ fmt->xfer_func = V4L2_XFER_FUNC_NONE;
+}
+
+static int hm1246_set_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct hm1246 *hm1246 = to_hm1246(sd);
+ struct v4l2_mbus_framefmt *mbus_fmt;
+ struct v4l2_rect *crop;
+ const struct hm1246_mode *mode;
+
+ mode = hm1246_find_mode_by_mbus_code(hm1246, fmt->format.code);
+ if (IS_ERR(mode))
+ mode = &hm1246_modes[0];
+
+ crop = v4l2_subdev_state_get_crop(state, 0);
+ crop->top = mode->top;
+ crop->left = mode->left;
+ crop->width = mode->width;
+ crop->height = mode->height;
+
+ hm1246_update_pad_format(hm1246, mode, &fmt->format);
+ mbus_fmt = v4l2_subdev_state_get_format(state, 0);
+ *mbus_fmt = fmt->format;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ return 0;
+
+ hm1246->cur_mode = mode;
+ hm1246_update_controls(hm1246, mode);
+
+ return 0;
+}
+
+static int hm1246_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_selection *sel)
+{
+ struct hm1246 *hm1246 = to_hm1246(sd);
+ const struct hm1246_mode *mode = hm1246->cur_mode;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_CROP:
+ sel->r = *v4l2_subdev_state_get_crop(state, 0);
+ return 0;
+
+ case V4L2_SEL_TGT_NATIVE_SIZE:
+ sel->r.top = 0;
+ sel->r.left = 0;
+ sel->r.width = HM1246_NATIVE_WIDTH;
+ sel->r.height = HM1246_NATIVE_HEIGHT;
+ return 0;
+
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ sel->r.top = mode->top;
+ sel->r.left = mode->left;
+ sel->r.width = mode->width;
+ sel->r.height = mode->height;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int hm1246_init_state(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ struct hm1246 *hm1246 = to_hm1246(sd);
+ struct v4l2_subdev_format fmt = {
+ .which = V4L2_SUBDEV_FORMAT_TRY,
+ .pad = 0,
+ .format = {
+ .code = hm1246_get_format_code(hm1246,
+ &hm1246_modes[0]),
+ .width = hm1246_modes[0].width,
+ .height = hm1246_modes[0].height,
+ },
+ };
+
+ hm1246_set_format(sd, state, &fmt);
+
+ return 0;
+}
+
+static int hm1246_calc_pll(struct hm1246 *hm1246, u32 xclk, u32 link_freq,
+ u32 clocks_per_pixel, u8 *pll1, u8 *pll2, u8 *pll3)
+{
+ const u8 pclk_div_table[] = { 4, 5, 6, 7, 8, 12, 14, 16 };
+ const u8 sysclk_div_table[] = { 1, 2, 3, 4 };
+ const u8 post_div_table[] = { 1, 2, 4, 8 };
+ const int sysclk_pclk_ratio = 3; /* Recommended value */
+ u32 pclk, vco_out, best_vco_diff;
+ int pclk_div_index, sysclk_div_index, post_div_index;
+ u8 pre_div, multiplier_h, multiplier_l;
+ bool sysclk_pclk_ratio_found = false;
+
+ if (link_freq < HM1246_PCLK_MIN || link_freq > HM1246_PCLK_MAX)
+ return -EINVAL;
+
+ /* In raw mode (1 pixel per clock) the pixel clock is internally
+ * divided by two.
+ */
+ pclk = (2 * link_freq) / clocks_per_pixel;
+
+ /* Find suitable PCLK and SYSCLK dividers. */
+ for (pclk_div_index = 0; pclk_div_index < ARRAY_SIZE(pclk_div_table);
+ pclk_div_index++) {
+ for (sysclk_div_index = 0;
+ sysclk_div_index < ARRAY_SIZE(sysclk_div_table);
+ sysclk_div_index++) {
+ if (sysclk_div_table[sysclk_div_index] *
+ sysclk_pclk_ratio ==
+ pclk_div_table[pclk_div_index]) {
+ sysclk_pclk_ratio_found = true;
+ break;
+ }
+ }
+ if (sysclk_pclk_ratio_found)
+ break;
+ }
+
+ if (!sysclk_pclk_ratio_found)
+ return -EINVAL;
+
+ /* Determine an appropriate post divider. */
+ for (post_div_index = 0; post_div_index < ARRAY_SIZE(post_div_table);
+ post_div_index++) {
+ vco_out = pclk * (pclk_div_table[pclk_div_index] *
+ post_div_table[post_div_index]);
+
+ if (vco_out >= HM1246_PLL_VCO_MIN &&
+ vco_out <= HM1246_PLL_VCO_MAX)
+ break;
+ }
+ if (post_div_index >= ARRAY_SIZE(post_div_table))
+ return -EINVAL;
+
+ /* Find best pre-divider and multiplier values. */
+ best_vco_diff = U32_MAX;
+ for (u32 div = DIV_ROUND_UP(xclk, HM1246_PLL_INCLK_MAX);
+ div <= (xclk / HM1246_PLL_INCLK_MIN); div++) {
+ u32 multi, multi_h, multi_l, vco, diff;
+
+ multi = DIV_ROUND_CLOSEST_ULL((u64)vco_out * div, xclk);
+ if (multi < HM1246_PLL_MULTI_MIN ||
+ multi > HM1246_PLL_MULTI_MAX)
+ continue;
+
+ multi_h = multi / (HM1246_PLL_MULTI_H_MIN *
+ HM1246_PLL_MULTI_L_MAX) +
+ 2;
+ multi_l = multi / multi_h;
+ vco = ((u64)xclk * multi_h * multi_l) / div;
+
+ diff = abs(vco_out - vco);
+ if (diff < best_vco_diff) {
+ best_vco_diff = diff;
+ pre_div = div;
+ multiplier_h = multi_h;
+ multiplier_l = multi_l;
+ }
+
+ if (!diff)
+ break;
+ }
+
+ *pll1 = HM1246_PLL1CFG_MULTIPLIER(multiplier_l - 1);
+ *pll2 = HM1246_PLL2CFG_PRE_DIV(pre_div - 1) |
+ HM1246_PLL2CFG_MULTIPLIER(multiplier_h - 2);
+ *pll3 = HM1246_PLL3CFG_POST_DIV(post_div_index) |
+ HM1246_PLL3CFG_SYSCLK_DIV(sysclk_div_index) |
+ HM1246_PLL3CFG_PCLK_DIV(pclk_div_index);
+
+ return 0;
+}
+
+static int hm1246_cci_write_pll(struct hm1246 *hm1246, u8 pll1, u8 pll2,
+ u8 pll3)
+{
+ struct cci_reg_sequence pll_regs[] = {
+ { HM1246_PLL1CFG_REG, pll1 },
+ { HM1246_PLL2CFG_REG, pll2 },
+ { HM1246_PLL3CFG_REG, pll3 },
+ { HM1246_SBC_CTRL_REG, HM1246_SBC_CTRL_PLL_EN },
+ };
+
+ return cci_multi_reg_write(hm1246->regmap, pll_regs,
+ ARRAY_SIZE(pll_regs), NULL);
+}
+
+static int hm1246_pll_check_locked(struct hm1246 *hm1246)
+{
+ u64 boot_ref2;
+ int ret;
+
+ ret = cci_read(hm1246->regmap, HM1246_SBC_BOOT_REF2_REG, &boot_ref2,
+ NULL);
+ if (ret)
+ return ret;
+
+ return (boot_ref2 & HM1246_SBC_BOOT_REF2_PLL_LOCK) ? 0 : -EIO;
+}
+
+static int hm1246_setup_pll(struct hm1246 *hm1246,
+ const struct hm1246_mode *mode)
+{
+ u8 pll1, pll2, pll3;
+ int ret;
+
+ ret = hm1246_calc_pll(hm1246, hm1246->xclk_freq,
+ hm1246_link_freqs[mode->link_freq_index],
+ mode->clocks_per_pixel, &pll1, &pll2, &pll3);
+ if (ret)
+ return ret;
+
+ ret = hm1246_cci_write_pll(hm1246, pll1, pll2, pll3);
+ if (ret)
+ return ret;
+
+ /* PLL lock time: tpll typ. 100us */
+ fsleep(200);
+
+ ret = hm1246_pll_check_locked(hm1246);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int hm1246_cci_write_test_pattern(struct hm1246 *hm1246, u8 mode, u16 r,
+ u16 g, u16 b)
+{
+ struct cci_reg_sequence tpg_enable_regs[] = {
+ { HM1246_TEST_DATA_RED_REG, r },
+ { HM1246_TEST_DATA_GR_REG, g },
+ { HM1246_TEST_DATA_GB_REG, g },
+ { HM1246_TEST_DATA_BLUE_REG, b },
+ { HM1246_TEST_PATTERN_MODE_REG, mode },
+ };
+
+ return cci_multi_reg_write(hm1246->regmap, tpg_enable_regs,
+ ARRAY_SIZE(tpg_enable_regs), NULL);
+}
+
+static int hm1246_test_pattern(struct hm1246 *hm1246, u32 pattern_index)
+{
+ const u16 RGBMAX = 0x3FF;
+ int pattern;
+ u8 mode = HM1246_TEST_PATTERN_MODE_ENABLE;
+ u16 r = 0, g = 0, b = 0;
+
+ switch (pattern_index) {
+ case 1: /* Checkboard Pattern */
+ pattern = 0;
+ break;
+ case 2: /* Ramp */
+ pattern = 1;
+ break;
+ case 3: /* Moving ones */
+ pattern = 2;
+ break;
+ case 4: /* Blending color bars */
+ pattern = 3;
+ break;
+ case 5: /* Color bars */
+ pattern = 4;
+ break;
+ case 6: /* Solid white */
+ pattern = 15;
+ r = RGBMAX;
+ g = RGBMAX;
+ b = RGBMAX;
+ break;
+ case 7: /* Solid black */
+ pattern = 15;
+ break;
+ case 8: /* Solid red */
+ pattern = 15;
+ r = RGBMAX;
+ break;
+ case 9: /* Solid green */
+ pattern = 15;
+ g = RGBMAX;
+ break;
+ case 10: /* Solid blue */
+ pattern = 15;
+ b = RGBMAX;
+ break;
+
+ case 0: /* Disabled */
+ default:
+ mode = 0;
+ pattern = 0;
+ break;
+ }
+
+ mode |= HM1246_TEST_PATTERN_MODE_MODE(pattern);
+
+ return hm1246_cci_write_test_pattern(hm1246, mode, r, g, b);
+}
+
+static int hm1246_cci_write_cmu(struct hm1246 *hm1246, u32 reg, u64 val)
+{
+ struct cci_reg_sequence reg_seq[] = {
+ { reg, val },
+ { HM1246_CMU_UPDATE_REG, 0 },
+ };
+
+ return cci_multi_reg_write(hm1246->regmap, reg_seq, ARRAY_SIZE(reg_seq),
+ NULL);
+}
+
+static int hm1246_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct hm1246 *hm1246 = container_of(ctrl->handler, struct hm1246,
+ ctrls);
+ const struct v4l2_mbus_framefmt *format;
+ struct v4l2_subdev_state *state;
+ u32 val;
+ int ret;
+
+ state = v4l2_subdev_get_locked_active_state(&hm1246->sd);
+ format = v4l2_subdev_state_get_format(state, 0);
+
+ if (ctrl->id == V4L2_CID_VBLANK) {
+ s64 exposure_max;
+
+ exposure_max =
+ format->height + ctrl->val - HM1246_COARSE_INTG_MARGIN;
+ ret = __v4l2_ctrl_modify_range(hm1246->exposure_ctrl,
+ hm1246->exposure_ctrl->minimum,
+ exposure_max,
+ hm1246->exposure_ctrl->step,
+ exposure_max);
+
+ if (ret) {
+ dev_err(hm1246->dev, "exposure ctrl range update failed\n");
+ return ret;
+ }
+ }
+
+ if (!pm_runtime_get_if_active(hm1246->dev))
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_EXPOSURE:
+ ret = hm1246_cci_write_cmu(hm1246, HM1246_COARSE_INTG_REG,
+ ctrl->val);
+ break;
+
+ case V4L2_CID_ANALOGUE_GAIN:
+ ret = hm1246_cci_write_cmu(hm1246,
+ HM1246_ANALOG_GLOBAL_GAIN_REG,
+ ctrl->val);
+ break;
+
+ case V4L2_CID_VBLANK:
+ val = hm1246->cur_mode->height + ctrl->val;
+ ret = hm1246_cci_write_cmu(hm1246,
+ HM1246_FRAME_LENGTH_LINES_REG, val);
+ break;
+
+ case V4L2_CID_HFLIP:
+ case V4L2_CID_VFLIP:
+ val = 0;
+ if (hm1246->hflip_ctrl->val)
+ val |= HM1246_IMAGE_ORIENTATION_HFLIP;
+ if (hm1246->vflip_ctrl->val)
+ val |= HM1246_IMAGE_ORIENTATION_VFLIP;
+
+ ret = hm1246_cci_write_cmu(hm1246, HM1246_IMAGE_ORIENTATION_REG,
+ val);
+ break;
+
+ case V4L2_CID_TEST_PATTERN:
+ ret = hm1246_test_pattern(hm1246, ctrl->val);
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ pm_runtime_put(hm1246->dev);
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops hm1246_ctrl_ops = {
+ .s_ctrl = hm1246_set_ctrl,
+};
+
+static int hm1246_identify_module(struct hm1246 *hm1246)
+{
+ u64 model_id;
+ int ret;
+
+ if (hm1246->identified)
+ return 0;
+
+ ret = cci_read(hm1246->regmap, HM1246_MODEL_ID_REG, &model_id, NULL);
+ if (ret)
+ return ret;
+
+ if (model_id != HM1246_MODEL_ID) {
+ dev_err(hm1246->dev, "model id mismatch: 0x%llx!=0x%x\n",
+ model_id, HM1246_MODEL_ID);
+ return -ENXIO;
+ }
+
+ hm1246->identified = true;
+
+ return 0;
+}
+
+static int hm1246_setup_moderegs(struct hm1246 *hm1246,
+ const struct hm1246_mode *mode)
+{
+ const struct hm1246_reg_list *reg_list = &mode->reg_list;
+ const struct cci_reg_sequence modeaw[] = {
+ { HM1246_X_ADDR_START_REG, mode->left },
+ { HM1246_Y_ADDR_START_REG, mode->top },
+ { HM1246_X_ADDR_END_REG, mode->width - 1 },
+ { HM1246_Y_ADDR_END_REG, mode->height - 1 },
+ { HM1246_DWIN_XOFFSET_REG, mode->left },
+ { HM1246_DWIN_YOFFSET_REG, mode->top },
+ { HM1246_DWIN_XSIZE_REG, mode->width },
+ { HM1246_DWIN_YSIZE_REG, mode->height },
+ { HM1246_LINE_LENGTH_PCK_REG, mode->hts },
+ };
+ int ret = 0;
+
+ cci_multi_reg_write(hm1246->regmap, modeaw, ARRAY_SIZE(modeaw), &ret);
+ cci_multi_reg_write(hm1246->regmap, reg_list->regs,
+ reg_list->num_of_regs, &ret);
+
+ return ret;
+}
+
+static int hm1246_setup_bus(struct hm1246 *hm1246)
+{
+ u64 polarity_ctrl = 0, pclk_ctrl = 0;
+ int ret = 0;
+
+ if (hm1246->mbus_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+ polarity_ctrl |= HM1246_POLARITY_CTRL_HSYNC;
+
+ if (hm1246->mbus_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+ polarity_ctrl |= HM1246_POLARITY_CTRL_VSYNC;
+
+ cci_write(hm1246->regmap, HM1246_POLARITY_CTRL_REG, polarity_ctrl,
+ &ret);
+
+ /* If the clock output polarity flag PCLK_CTRL[3] is set (high), the
+ * data lines change state on the falling edge of PCLK and should
+ * therefore be sampled on the rising edge.
+ * This is different than described in the data sheet.
+ */
+ if (hm1246->mbus_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+ pclk_ctrl |= HM1246_PCLK_CTRL_POL;
+
+ cci_write(hm1246->regmap, HM1246_PCLK_CTRL_REG, pclk_ctrl, &ret);
+
+ return ret;
+}
+
+static int hm1246_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct hm1246 *hm1246 = to_hm1246(sd);
+ const struct hm1246_mode *mode = hm1246->cur_mode;
+ int ret;
+
+ ret = pm_runtime_resume_and_get(hm1246->dev);
+ if (ret)
+ return ret;
+
+ ret = hm1246_identify_module(hm1246);
+ if (ret)
+ goto err_rpm_put;
+
+ ret = hm1246_setup_pll(hm1246, mode);
+ if (ret) {
+ dev_err(hm1246->dev, "failed to setup PLL\n");
+ goto err_rpm_put;
+ }
+
+ ret = hm1246_setup_moderegs(hm1246, mode);
+ if (ret)
+ goto err_rpm_put;
+
+ ret = hm1246_setup_bus(hm1246);
+ if (ret)
+ goto err_rpm_put;
+
+ ret = __v4l2_ctrl_handler_setup(&hm1246->ctrls);
+ if (ret) {
+ dev_err(hm1246->dev, "failed to setup v4l2 controls\n");
+ goto err_rpm_put;
+ }
+
+ ret = cci_write(hm1246->regmap, HM1246_MODE_SELECT_REG,
+ HM1246_MODE_SELECT_STREAM, NULL);
+ if (ret)
+ goto err_rpm_put;
+
+ /* Since mirroring may change the actual pixel format, it must not be
+ * changed during streaming.
+ */
+ __v4l2_ctrl_grab(hm1246->vflip_ctrl, true);
+ __v4l2_ctrl_grab(hm1246->hflip_ctrl, true);
+
+ return 0;
+
+err_rpm_put:
+ pm_runtime_put(hm1246->dev);
+
+ return ret;
+}
+
+static int hm1246_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct hm1246 *hm1246 = to_hm1246(sd);
+ int ret;
+
+ ret = cci_write(hm1246->regmap, HM1246_MODE_SELECT_REG,
+ HM1246_MODE_SELECT_STANDBY, NULL);
+
+ __v4l2_ctrl_grab(hm1246->vflip_ctrl, false);
+ __v4l2_ctrl_grab(hm1246->hflip_ctrl, false);
+
+ pm_runtime_put(hm1246->dev);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_video_ops hm1246_video_ops = {
+ .s_stream = v4l2_subdev_s_stream_helper,
+
+};
+
+static const struct v4l2_subdev_pad_ops hm1246_subdev_pad_ops = {
+ .enum_mbus_code = hm1246_enum_mbus_code,
+ .enum_frame_size = hm1246_enum_frame_size,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = hm1246_set_format,
+ .get_selection = hm1246_get_selection,
+ .enable_streams = hm1246_enable_streams,
+ .disable_streams = hm1246_disable_streams,
+};
+
+static int __maybe_unused hm1246_g_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct hm1246 *hm1246 = to_hm1246(sd);
+ u64 val;
+ int ret;
+
+ if (!pm_runtime_get_if_in_use(sd->dev))
+ return 0;
+
+ ret = cci_read(hm1246->regmap, CCI_REG8(reg->reg), &val, NULL);
+ reg->val = val;
+
+ pm_runtime_put(sd->dev);
+
+ return ret;
+}
+
+static int __maybe_unused hm1246_s_register(struct v4l2_subdev *sd,
+ const struct v4l2_dbg_register *reg)
+{
+ struct hm1246 *hm1246 = to_hm1246(sd);
+ int ret;
+
+ if (!pm_runtime_get_if_in_use(sd->dev))
+ return 0;
+
+ ret = cci_write(hm1246->regmap, CCI_REG8(reg->reg), (u64)reg->val,
+ NULL);
+
+ pm_runtime_put(sd->dev);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_core_ops hm1246_core_ops = {
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = hm1246_g_register,
+ .s_register = hm1246_s_register,
+#endif
+ .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_ops hm1246_subdev_ops = {
+ .core = &hm1246_core_ops,
+ .video = &hm1246_video_ops,
+ .pad = &hm1246_subdev_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops hm1246_internal_ops = {
+ .init_state = hm1246_init_state,
+};
+
+static int hm1246_get_regulators(struct device *dev, struct hm1246 *hm1246)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(hm1246_supply_names); i++)
+ hm1246->supplies[i].supply = hm1246_supply_names[i];
+
+ return devm_regulator_bulk_get(dev, ARRAY_SIZE(hm1246_supply_names),
+ hm1246->supplies);
+}
+
+static int hm1246_parse_fwnode(struct hm1246 *hm1246)
+{
+ struct fwnode_handle *endpoint;
+ struct v4l2_fwnode_endpoint bus_cfg = {
+ .bus_type = V4L2_MBUS_PARALLEL,
+ };
+ struct device *dev = hm1246->dev;
+ int ret;
+
+ endpoint = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0,
+ FWNODE_GRAPH_ENDPOINT_NEXT);
+ if (!endpoint)
+ return dev_err_probe(dev, -EINVAL, "missing endpoint node\n");
+
+ ret = v4l2_fwnode_endpoint_parse(endpoint, &bus_cfg);
+ if (ret) {
+ dev_err_probe(dev, ret, "parsing endpoint node failed\n");
+ goto done;
+ }
+
+ hm1246->mbus_flags = bus_cfg.bus.parallel.flags;
+
+done:
+ fwnode_handle_put(endpoint);
+
+ return ret;
+}
+
+static int hm1246_init_controls(struct hm1246 *hm1246)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&hm1246->sd);
+ const struct hm1246_mode *mode = &hm1246_modes[0];
+ const struct v4l2_ctrl_ops *ops = &hm1246_ctrl_ops;
+ struct v4l2_fwnode_device_properties props;
+ struct v4l2_ctrl_handler *ctrl_hdlr;
+ s64 pixel_rate, exposure_max, vblank_min, hblank;
+ int ret;
+
+ ctrl_hdlr = &hm1246->ctrls;
+ ret = v4l2_ctrl_handler_init(ctrl_hdlr, 9);
+ if (ret)
+ return ret;
+
+ hm1246->hflip_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &hm1246_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ if (hm1246->hflip_ctrl)
+ hm1246->hflip_ctrl->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+
+ hm1246->vflip_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &hm1246_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ if (hm1246->vflip_ctrl)
+ hm1246->vflip_ctrl->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT;
+
+ v4l2_ctrl_cluster(2, &hm1246->hflip_ctrl);
+
+ hm1246->link_freq_ctrl =
+ v4l2_ctrl_new_int_menu(ctrl_hdlr,
+ &hm1246_ctrl_ops,
+ V4L2_CID_LINK_FREQ,
+ ARRAY_SIZE(hm1246_link_freqs) - 1,
+ 0,
+ hm1246_link_freqs);
+ if (hm1246->link_freq_ctrl)
+ hm1246->link_freq_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ pixel_rate = hm1246_link_freqs[mode->link_freq_index] /
+ mode->clocks_per_pixel;
+ hm1246->pixel_rate_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &hm1246_ctrl_ops,
+ V4L2_CID_PIXEL_RATE, 0,
+ pixel_rate, 1, pixel_rate);
+
+ vblank_min = mode->vts_min - mode->height;
+ hm1246->vblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &hm1246_ctrl_ops,
+ V4L2_CID_VBLANK, vblank_min,
+ HM1246_VTS_MAX - mode->height,
+ 1, vblank_min);
+
+ hblank = mode->hts - mode->width;
+ hm1246->hblank_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &hm1246_ctrl_ops,
+ V4L2_CID_HBLANK, hblank, hblank,
+ 1, hblank);
+ if (hm1246->hblank_ctrl)
+ hm1246->hblank_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+ v4l2_ctrl_new_std(ctrl_hdlr, &hm1246_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
+ HM1246_ANALOG_GLOBAL_GAIN_MIN,
+ HM1246_ANALOG_GLOBAL_GAIN_MAX,
+ HM1246_ANALOG_GLOBAL_GAIN_STEP,
+ HM1246_ANALOG_GLOBAL_GAIN_MIN);
+
+ exposure_max = mode->vts_min - HM1246_COARSE_INTG_MARGIN;
+ hm1246->exposure_ctrl = v4l2_ctrl_new_std(ctrl_hdlr, &hm1246_ctrl_ops,
+ V4L2_CID_EXPOSURE,
+ HM1246_COARSE_INTG_MIN,
+ exposure_max,
+ HM1246_COARSE_INTG_STEP,
+ exposure_max);
+
+ v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &hm1246_ctrl_ops,
+ V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(hm1246_test_pattern_menu) - 1,
+ 0, 0, hm1246_test_pattern_menu);
+
+ ret = v4l2_fwnode_device_parse(&client->dev, &props);
+ if (ret)
+ goto err_v4l2_ctrl_handler_free;
+
+ ret = v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, ops, &props);
+ if (ret)
+ goto err_v4l2_ctrl_handler_free;
+
+ if (ctrl_hdlr->error) {
+ ret = ctrl_hdlr->error;
+ goto err_v4l2_ctrl_handler_free;
+ }
+
+ hm1246->sd.ctrl_handler = ctrl_hdlr;
+
+ return 0;
+
+err_v4l2_ctrl_handler_free:
+ v4l2_ctrl_handler_free(ctrl_hdlr);
+
+ return ret;
+}
+
+static int hm1246_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct hm1246 *hm1246;
+ int ret;
+
+ hm1246 = devm_kzalloc(dev, sizeof(*hm1246), GFP_KERNEL);
+ if (!hm1246)
+ return -ENOMEM;
+
+ hm1246->dev = dev;
+
+ ret = hm1246_parse_fwnode(hm1246);
+ if (ret)
+ return ret;
+
+ hm1246->regmap = devm_cci_regmap_init_i2c(client, 16);
+ if (IS_ERR(hm1246->regmap))
+ return dev_err_probe(dev, PTR_ERR(hm1246->regmap),
+ "failed to init CCI\n");
+
+ hm1246->xclk = devm_clk_get(dev, NULL);
+ if (IS_ERR(hm1246->xclk))
+ return dev_err_probe(dev, PTR_ERR(hm1246->xclk),
+ "failed to get xclk\n");
+
+ hm1246->xclk_freq = clk_get_rate(hm1246->xclk);
+ if (hm1246->xclk_freq < HM1246_XCLK_MIN ||
+ hm1246->xclk_freq > HM1246_XCLK_MAX)
+ dev_err_probe(dev, -EINVAL,
+ "xclk frequency out of range: %luHz\n",
+ hm1246->xclk_freq);
+
+ ret = hm1246_get_regulators(dev, hm1246);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to get regulators\n");
+
+ hm1246->reset_gpio =
+ devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(hm1246->reset_gpio))
+ return dev_err_probe(dev, ret, "failed to get reset GPIO\n");
+
+ v4l2_i2c_subdev_init(&hm1246->sd, client, &hm1246_subdev_ops);
+ hm1246->sd.internal_ops = &hm1246_internal_ops;
+ hm1246->cur_mode = &hm1246_modes[0];
+
+ ret = hm1246_init_controls(hm1246);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to init controls\n");
+
+ hm1246->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+ V4L2_SUBDEV_FL_HAS_EVENTS;
+ hm1246->pad.flags = MEDIA_PAD_FL_SOURCE;
+ hm1246->sd.dev = &client->dev;
+ hm1246->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+
+ ret = media_entity_pads_init(&hm1246->sd.entity, 1, &hm1246->pad);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to init media pads\n");
+ goto err_v4l2_ctrl_handler_free;
+ }
+
+ hm1246->sd.state_lock = hm1246->ctrls.lock;
+ ret = v4l2_subdev_init_finalize(&hm1246->sd);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to init v4l2 subdev\n");
+ goto err_media_entity_cleanup;
+ }
+
+ ret = v4l2_async_register_subdev_sensor(&hm1246->sd);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to register v4l2 subdev\n");
+ goto err_subdev_cleanup;
+ }
+
+ pm_runtime_enable(hm1246->dev);
+ pm_runtime_set_autosuspend_delay(hm1246->dev, 1000);
+ pm_runtime_use_autosuspend(hm1246->dev);
+ pm_runtime_idle(hm1246->dev);
+
+ return 0;
+
+err_subdev_cleanup:
+ v4l2_subdev_cleanup(&hm1246->sd);
+ pm_runtime_disable(hm1246->dev);
+ pm_runtime_set_suspended(hm1246->dev);
+
+err_media_entity_cleanup:
+ media_entity_cleanup(&hm1246->sd.entity);
+
+err_v4l2_ctrl_handler_free:
+ v4l2_ctrl_handler_free(&hm1246->ctrls);
+
+ return ret;
+}
+
+static void hm1246_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct hm1246 *hm1246 = to_hm1246(sd);
+
+ v4l2_async_unregister_subdev(&hm1246->sd);
+ v4l2_subdev_cleanup(sd);
+ media_entity_cleanup(&hm1246->sd.entity);
+ v4l2_ctrl_handler_free(&hm1246->ctrls);
+
+ pm_runtime_disable(&client->dev);
+ if (!pm_runtime_status_suspended(&client->dev)) {
+ hm1246_power_off(hm1246->dev);
+ pm_runtime_set_suspended(&client->dev);
+ }
+}
+
+static const struct of_device_id hm1246_of_match[] = {
+ { .compatible = "himax,hm1246" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, hm1246_of_match);
+
+static DEFINE_RUNTIME_DEV_PM_OPS(hm1246_pm_ops, hm1246_power_off,
+ hm1246_power_on, NULL);
+
+static struct i2c_driver hm1246_i2c_driver = {
+ .driver = {
+ .of_match_table = hm1246_of_match,
+ .pm = pm_ptr(&hm1246_pm_ops),
+ .name = "hm1246",
+ },
+ .probe = hm1246_probe,
+ .remove = hm1246_remove,
+};
+module_i2c_driver(hm1246_i2c_driver);
+
+MODULE_DESCRIPTION("Himax HM1246 camera driver");
+MODULE_AUTHOR("Matthias Fend <matthias.fend@...end.at>");
+MODULE_LICENSE("GPL");
--
2.34.1
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