// SPDX-License-Identifier: GPL-2.0 /* * A V4L2 driver for Sony IMX708 cameras. * Copyright (C) 2022, Raspberry Pi Ltd * * Based on Sony imx477 camera driver * Copyright (C) 2020 Raspberry Pi Ltd */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Parameter to adjust Quad Bayer re-mosaic broken line correction * strength, used in full-resolution mode only. Set zero to disable. */ static int qbc_adjust = 2; module_param(qbc_adjust, int, 0644); MODULE_PARM_DESC(qbc_adjust, "Quad Bayer broken line correction strength [0,2-5]"); #define IMX708_REG_VALUE_08BIT 1 #define IMX708_REG_VALUE_16BIT 2 /* Chip ID */ #define IMX708_REG_CHIP_ID 0x0016 #define IMX708_CHIP_ID 0x0708 #define IMX708_REG_MODE_SELECT 0x0100 #define IMX708_MODE_STANDBY 0x00 #define IMX708_MODE_STREAMING 0x01 #define IMX708_REG_ORIENTATION 0x101 #define IMX708_INCLK_FREQ 24000000 /* Default initial pixel rate, will get updated for each mode. */ #define IMX708_INITIAL_PIXEL_RATE 590000000 /* V_TIMING internal */ #define IMX708_REG_FRAME_LENGTH 0x0340 #define IMX708_FRAME_LENGTH_MAX 0xffff /* H_TIMING internal */ #define IMX708_REG_LINE_LENGTH 0x0342 /* Long exposure multiplier */ #define IMX708_LONG_EXP_SHIFT_MAX 7 #define IMX708_LONG_EXP_SHIFT_REG 0x3100 /* Exposure control */ #define IMX708_REG_EXPOSURE 0x0202 #define IMX708_EXPOSURE_OFFSET 48 #define IMX708_EXPOSURE_DEFAULT 0x640 #define IMX708_EXPOSURE_STEP 1 #define IMX708_EXPOSURE_MIN 1 #define IMX708_EXPOSURE_MAX (IMX708_FRAME_LENGTH_MAX - \ IMX708_EXPOSURE_OFFSET) /* Analog gain control */ #define IMX708_REG_ANALOG_GAIN 0x0204 #define IMX708_ANA_GAIN_MIN 112 #define IMX708_ANA_GAIN_MAX 960 #define IMX708_ANA_GAIN_STEP 1 #define IMX708_ANA_GAIN_DEFAULT IMX708_ANA_GAIN_MIN /* Digital gain control */ #define IMX708_REG_DIGITAL_GAIN 0x020e #define IMX708_DGTL_GAIN_MIN 0x0100 #define IMX708_DGTL_GAIN_MAX 0xffff #define IMX708_DGTL_GAIN_DEFAULT 0x0100 #define IMX708_DGTL_GAIN_STEP 1 /* Colour balance controls */ #define IMX708_REG_COLOUR_BALANCE_RED 0x0b90 #define IMX708_REG_COLOUR_BALANCE_BLUE 0x0b92 #define IMX708_COLOUR_BALANCE_MIN 0x01 #define IMX708_COLOUR_BALANCE_MAX 0xffff #define IMX708_COLOUR_BALANCE_STEP 0x01 #define IMX708_COLOUR_BALANCE_DEFAULT 0x100 /* Test Pattern Control */ #define IMX708_REG_TEST_PATTERN 0x0600 #define IMX708_TEST_PATTERN_DISABLE 0 #define IMX708_TEST_PATTERN_SOLID_COLOR 1 #define IMX708_TEST_PATTERN_COLOR_BARS 2 #define IMX708_TEST_PATTERN_GREY_COLOR 3 #define IMX708_TEST_PATTERN_PN9 4 /* Test pattern colour components */ #define IMX708_REG_TEST_PATTERN_R 0x0602 #define IMX708_REG_TEST_PATTERN_GR 0x0604 #define IMX708_REG_TEST_PATTERN_B 0x0606 #define IMX708_REG_TEST_PATTERN_GB 0x0608 #define IMX708_TEST_PATTERN_COLOUR_MIN 0 #define IMX708_TEST_PATTERN_COLOUR_MAX 0x0fff #define IMX708_TEST_PATTERN_COLOUR_STEP 1 #define IMX708_REG_BASE_SPC_GAINS_L 0x7b10 #define IMX708_REG_BASE_SPC_GAINS_R 0x7c00 /* HDR exposure ratio (long:med == med:short) */ #define IMX708_HDR_EXPOSURE_RATIO 4 #define IMX708_REG_MID_EXPOSURE 0x3116 #define IMX708_REG_SHT_EXPOSURE 0x0224 #define IMX708_REG_MID_ANALOG_GAIN 0x3118 #define IMX708_REG_SHT_ANALOG_GAIN 0x0216 /* QBC Re-mosaic broken line correction registers */ #define IMX708_LPF_INTENSITY_EN 0xC428 #define IMX708_LPF_INTENSITY_ENABLED 0x00 #define IMX708_LPF_INTENSITY_DISABLED 0x01 #define IMX708_LPF_INTENSITY 0xC429 /* * Metadata buffer holds a variety of data, all sent with the same VC/DT (0x12). * It comprises two scanlines (of up to 5760 bytes each, for 4608 pixels) * of embedded data, one line of PDAF data, and two lines of AE-HIST data * (AE histograms are valid for HDR mode and empty in non-HDR modes). */ #define IMX708_EMBEDDED_LINE_WIDTH (5 * 5760) #define IMX708_NUM_EMBEDDED_LINES 1 enum pad_types { IMAGE_PAD, METADATA_PAD, NUM_PADS }; /* IMX708 native and active pixel array size. */ #define IMX708_NATIVE_WIDTH 4640U #define IMX708_NATIVE_HEIGHT 2658U #define IMX708_PIXEL_ARRAY_LEFT 16U #define IMX708_PIXEL_ARRAY_TOP 24U #define IMX708_PIXEL_ARRAY_WIDTH 4608U #define IMX708_PIXEL_ARRAY_HEIGHT 2592U struct imx708_reg { u16 address; u8 val; }; struct imx708_reg_list { unsigned int num_of_regs; const struct imx708_reg *regs; }; /* Mode : resolution and related config&values */ struct imx708_mode { /* Frame width */ unsigned int width; /* Frame height */ unsigned int height; /* H-timing in pixels */ unsigned int line_length_pix; /* Analog crop rectangle. */ struct v4l2_rect crop; /* Highest possible framerate. */ unsigned int vblank_min; /* Default framerate. */ unsigned int vblank_default; /* Default register values */ struct imx708_reg_list reg_list; /* Not all modes have the same pixel rate. */ u64 pixel_rate; /* Not all modes have the same minimum exposure. */ u32 exposure_lines_min; /* Not all modes have the same exposure lines step. */ u32 exposure_lines_step; /* HDR flag, used for checking if the current mode is HDR */ bool hdr; /* Quad Bayer Re-mosaic flag */ bool remosaic; }; /* Default PDAF pixel correction gains */ static const u8 pdaf_gains[2][9] = { { 0x4c, 0x4c, 0x4c, 0x46, 0x3e, 0x38, 0x35, 0x35, 0x35 }, { 0x35, 0x35, 0x35, 0x38, 0x3e, 0x46, 0x4c, 0x4c, 0x4c } }; /* Link frequency setup */ enum { IMX708_LINK_FREQ_450MHZ, IMX708_LINK_FREQ_447MHZ, IMX708_LINK_FREQ_453MHZ, }; static const s64 link_freqs[] = { [IMX708_LINK_FREQ_450MHZ] = 450000000, [IMX708_LINK_FREQ_447MHZ] = 447000000, [IMX708_LINK_FREQ_453MHZ] = 453000000, }; /* 450MHz is the nominal "default" link frequency */ static const struct imx708_reg link_450Mhz_regs[] = { {0x030E, 0x01}, {0x030F, 0x2c}, }; static const struct imx708_reg link_447Mhz_regs[] = { {0x030E, 0x01}, {0x030F, 0x2a}, }; static const struct imx708_reg link_453Mhz_regs[] = { {0x030E, 0x01}, {0x030F, 0x2e}, }; static const struct imx708_reg_list link_freq_regs[] = { [IMX708_LINK_FREQ_450MHZ] = { .regs = link_450Mhz_regs, .num_of_regs = ARRAY_SIZE(link_450Mhz_regs) }, [IMX708_LINK_FREQ_447MHZ] = { .regs = link_447Mhz_regs, .num_of_regs = ARRAY_SIZE(link_447Mhz_regs) }, [IMX708_LINK_FREQ_453MHZ] = { .regs = link_453Mhz_regs, .num_of_regs = ARRAY_SIZE(link_453Mhz_regs) }, }; static const struct imx708_reg mode_common_regs[] = { {0x0100, 0x00}, {0x0136, 0x18}, {0x0137, 0x00}, {0x33F0, 0x02}, {0x33F1, 0x05}, {0x3062, 0x00}, {0x3063, 0x12}, {0x3068, 0x00}, {0x3069, 0x12}, {0x306A, 0x00}, {0x306B, 0x30}, {0x3076, 0x00}, {0x3077, 0x30}, {0x3078, 0x00}, {0x3079, 0x30}, {0x5E54, 0x0C}, {0x6E44, 0x00}, {0xB0B6, 0x01}, {0xE829, 0x00}, {0xF001, 0x08}, {0xF003, 0x08}, {0xF00D, 0x10}, {0xF00F, 0x10}, {0xF031, 0x08}, {0xF033, 0x08}, {0xF03D, 0x10}, {0xF03F, 0x10}, {0x0112, 0x0A}, {0x0113, 0x0A}, {0x0114, 0x03}, {0x0B8E, 0x01}, {0x0B8F, 0x00}, {0x0B94, 0x01}, {0x0B95, 0x00}, {0x3400, 0x01}, {0x3478, 0x01}, {0x3479, 0x1c}, {0x3091, 0x01}, {0x3092, 0x00}, {0x3419, 0x00}, {0xBCF1, 0x02}, {0x3094, 0x01}, {0x3095, 0x01}, {0x3362, 0x00}, {0x3363, 0x00}, {0x3364, 0x00}, {0x3365, 0x00}, {0x0138, 0x01}, }; /* 10-bit. */ static const struct imx708_reg mode_4608x2592_regs[] = { {0x0340, 0x0A}, {0x0341, 0x59}, {0x0344, 0x00}, {0x0345, 0x00}, {0x0346, 0x00}, {0x0347, 0x00}, {0x0348, 0x11}, {0x0349, 0xFF}, {0x034A, 0X0A}, {0x034B, 0x1F}, {0x0220, 0x62}, {0x0222, 0x01}, {0x0900, 0x00}, {0x0901, 0x11}, {0x0902, 0x0A}, {0x3200, 0x01}, {0x3201, 0x01}, {0x32D5, 0x01}, {0x32D6, 0x00}, {0x32DB, 0x01}, {0x32DF, 0x00}, {0x350C, 0x00}, {0x350D, 0x00}, {0x0408, 0x00}, {0x0409, 0x00}, {0x040A, 0x00}, {0x040B, 0x00}, {0x040C, 0x12}, {0x040D, 0x00}, {0x040E, 0x0A}, {0x040F, 0x20}, {0x034C, 0x12}, {0x034D, 0x00}, {0x034E, 0x0A}, {0x034F, 0x20}, {0x0301, 0x05}, {0x0303, 0x02}, {0x0305, 0x02}, {0x0306, 0x00}, {0x0307, 0x7C}, {0x030B, 0x02}, {0x030D, 0x04}, {0x0310, 0x01}, {0x3CA0, 0x00}, {0x3CA1, 0x64}, {0x3CA4, 0x00}, {0x3CA5, 0x00}, {0x3CA6, 0x00}, {0x3CA7, 0x00}, {0x3CAA, 0x00}, {0x3CAB, 0x00}, {0x3CB8, 0x00}, {0x3CB9, 0x08}, {0x3CBA, 0x00}, {0x3CBB, 0x00}, {0x3CBC, 0x00}, {0x3CBD, 0x3C}, {0x3CBE, 0x00}, {0x3CBF, 0x00}, {0x0202, 0x0A}, {0x0203, 0x29}, {0x0224, 0x01}, {0x0225, 0xF4}, {0x3116, 0x01}, {0x3117, 0xF4}, {0x0204, 0x00}, {0x0205, 0x00}, {0x0216, 0x00}, {0x0217, 0x00}, {0x0218, 0x01}, {0x0219, 0x00}, {0x020E, 0x01}, {0x020F, 0x00}, {0x3118, 0x00}, {0x3119, 0x00}, {0x311A, 0x01}, {0x311B, 0x00}, {0x341a, 0x00}, {0x341b, 0x00}, {0x341c, 0x00}, {0x341d, 0x00}, {0x341e, 0x01}, {0x341f, 0x20}, {0x3420, 0x00}, {0x3421, 0xd8}, {0x3366, 0x00}, {0x3367, 0x00}, {0x3368, 0x00}, {0x3369, 0x00}, }; static const struct imx708_reg mode_2x2binned_regs[] = { {0x0340, 0x05}, {0x0341, 0x38}, {0x0344, 0x00}, {0x0345, 0x00}, {0x0346, 0x00}, {0x0347, 0x00}, {0x0348, 0x11}, {0x0349, 0xFF}, {0x034A, 0X0A}, {0x034B, 0x1F}, {0x0220, 0x62}, {0x0222, 0x01}, {0x0900, 0x01}, {0x0901, 0x22}, {0x0902, 0x08}, {0x3200, 0x41}, {0x3201, 0x41}, {0x32D5, 0x00}, {0x32D6, 0x00}, {0x32DB, 0x01}, {0x32DF, 0x00}, {0x350C, 0x00}, {0x350D, 0x00}, {0x0408, 0x00}, {0x0409, 0x00}, {0x040A, 0x00}, {0x040B, 0x00}, {0x040C, 0x09}, {0x040D, 0x00}, {0x040E, 0x05}, {0x040F, 0x10}, {0x034C, 0x09}, {0x034D, 0x00}, {0x034E, 0x05}, {0x034F, 0x10}, {0x0301, 0x05}, {0x0303, 0x02}, {0x0305, 0x02}, {0x0306, 0x00}, {0x0307, 0x7A}, {0x030B, 0x02}, {0x030D, 0x04}, {0x0310, 0x01}, {0x3CA0, 0x00}, {0x3CA1, 0x3C}, {0x3CA4, 0x00}, {0x3CA5, 0x3C}, {0x3CA6, 0x00}, {0x3CA7, 0x00}, {0x3CAA, 0x00}, {0x3CAB, 0x00}, {0x3CB8, 0x00}, {0x3CB9, 0x1C}, {0x3CBA, 0x00}, {0x3CBB, 0x08}, {0x3CBC, 0x00}, {0x3CBD, 0x1E}, {0x3CBE, 0x00}, {0x3CBF, 0x0A}, {0x0202, 0x05}, {0x0203, 0x08}, {0x0224, 0x01}, {0x0225, 0xF4}, {0x3116, 0x01}, {0x3117, 0xF4}, {0x0204, 0x00}, {0x0205, 0x70}, {0x0216, 0x00}, {0x0217, 0x70}, {0x0218, 0x01}, {0x0219, 0x00}, {0x020E, 0x01}, {0x020F, 0x00}, {0x3118, 0x00}, {0x3119, 0x70}, {0x311A, 0x01}, {0x311B, 0x00}, {0x341a, 0x00}, {0x341b, 0x00}, {0x341c, 0x00}, {0x341d, 0x00}, {0x341e, 0x00}, {0x341f, 0x90}, {0x3420, 0x00}, {0x3421, 0x6c}, {0x3366, 0x00}, {0x3367, 0x00}, {0x3368, 0x00}, {0x3369, 0x00}, }; static const struct imx708_reg mode_2x2binned_720p_regs[] = { {0x0340, 0x04}, {0x0341, 0xB6}, {0x0344, 0x03}, {0x0345, 0x00}, {0x0346, 0x01}, {0x0347, 0xB0}, {0x0348, 0x0E}, {0x0349, 0xFF}, {0x034A, 0x08}, {0x034B, 0x6F}, {0x0220, 0x62}, {0x0222, 0x01}, {0x0900, 0x01}, {0x0901, 0x22}, {0x0902, 0x08}, {0x3200, 0x41}, {0x3201, 0x41}, {0x32D5, 0x00}, {0x32D6, 0x00}, {0x32DB, 0x01}, {0x32DF, 0x01}, {0x350C, 0x00}, {0x350D, 0x00}, {0x0408, 0x00}, {0x0409, 0x00}, {0x040A, 0x00}, {0x040B, 0x00}, {0x040C, 0x06}, {0x040D, 0x00}, {0x040E, 0x03}, {0x040F, 0x60}, {0x034C, 0x06}, {0x034D, 0x00}, {0x034E, 0x03}, {0x034F, 0x60}, {0x0301, 0x05}, {0x0303, 0x02}, {0x0305, 0x02}, {0x0306, 0x00}, {0x0307, 0x76}, {0x030B, 0x02}, {0x030D, 0x04}, {0x0310, 0x01}, {0x3CA0, 0x00}, {0x3CA1, 0x3C}, {0x3CA4, 0x01}, {0x3CA5, 0x5E}, {0x3CA6, 0x00}, {0x3CA7, 0x00}, {0x3CAA, 0x00}, {0x3CAB, 0x00}, {0x3CB8, 0x00}, {0x3CB9, 0x0C}, {0x3CBA, 0x00}, {0x3CBB, 0x04}, {0x3CBC, 0x00}, {0x3CBD, 0x1E}, {0x3CBE, 0x00}, {0x3CBF, 0x05}, {0x0202, 0x04}, {0x0203, 0x86}, {0x0224, 0x01}, {0x0225, 0xF4}, {0x3116, 0x01}, {0x3117, 0xF4}, {0x0204, 0x00}, {0x0205, 0x70}, {0x0216, 0x00}, {0x0217, 0x70}, {0x0218, 0x01}, {0x0219, 0x00}, {0x020E, 0x01}, {0x020F, 0x00}, {0x3118, 0x00}, {0x3119, 0x70}, {0x311A, 0x01}, {0x311B, 0x00}, {0x341a, 0x00}, {0x341b, 0x00}, {0x341c, 0x00}, {0x341d, 0x00}, {0x341e, 0x00}, {0x341f, 0x60}, {0x3420, 0x00}, {0x3421, 0x48}, {0x3366, 0x00}, {0x3367, 0x00}, {0x3368, 0x00}, {0x3369, 0x00}, }; static const struct imx708_reg mode_hdr_regs[] = { {0x0340, 0x0A}, {0x0341, 0x5B}, {0x0344, 0x00}, {0x0345, 0x00}, {0x0346, 0x00}, {0x0347, 0x00}, {0x0348, 0x11}, {0x0349, 0xFF}, {0x034A, 0X0A}, {0x034B, 0x1F}, {0x0220, 0x01}, {0x0222, IMX708_HDR_EXPOSURE_RATIO}, {0x0900, 0x00}, {0x0901, 0x11}, {0x0902, 0x0A}, {0x3200, 0x01}, {0x3201, 0x01}, {0x32D5, 0x00}, {0x32D6, 0x00}, {0x32DB, 0x01}, {0x32DF, 0x00}, {0x350C, 0x00}, {0x350D, 0x00}, {0x0408, 0x00}, {0x0409, 0x00}, {0x040A, 0x00}, {0x040B, 0x00}, {0x040C, 0x09}, {0x040D, 0x00}, {0x040E, 0x05}, {0x040F, 0x10}, {0x034C, 0x09}, {0x034D, 0x00}, {0x034E, 0x05}, {0x034F, 0x10}, {0x0301, 0x05}, {0x0303, 0x02}, {0x0305, 0x02}, {0x0306, 0x00}, {0x0307, 0xA2}, {0x030B, 0x02}, {0x030D, 0x04}, {0x0310, 0x01}, {0x3CA0, 0x00}, {0x3CA1, 0x00}, {0x3CA4, 0x00}, {0x3CA5, 0x00}, {0x3CA6, 0x00}, {0x3CA7, 0x28}, {0x3CAA, 0x00}, {0x3CAB, 0x00}, {0x3CB8, 0x00}, {0x3CB9, 0x30}, {0x3CBA, 0x00}, {0x3CBB, 0x00}, {0x3CBC, 0x00}, {0x3CBD, 0x32}, {0x3CBE, 0x00}, {0x3CBF, 0x00}, {0x0202, 0x0A}, {0x0203, 0x2B}, {0x0224, 0x0A}, {0x0225, 0x2B}, {0x3116, 0x0A}, {0x3117, 0x2B}, {0x0204, 0x00}, {0x0205, 0x00}, {0x0216, 0x00}, {0x0217, 0x00}, {0x0218, 0x01}, {0x0219, 0x00}, {0x020E, 0x01}, {0x020F, 0x00}, {0x3118, 0x00}, {0x3119, 0x00}, {0x311A, 0x01}, {0x311B, 0x00}, {0x341a, 0x00}, {0x341b, 0x00}, {0x341c, 0x00}, {0x341d, 0x00}, {0x341e, 0x00}, {0x341f, 0x90}, {0x3420, 0x00}, {0x3421, 0x6c}, {0x3360, 0x01}, {0x3361, 0x01}, {0x3366, 0x09}, {0x3367, 0x00}, {0x3368, 0x05}, {0x3369, 0x10}, }; /* Mode configs. Keep separate lists for when HDR is enabled or not. */ static const struct imx708_mode supported_modes_10bit_no_hdr[] = { { /* Full resolution. */ .width = 4608, .height = 2592, .line_length_pix = 10432, .crop = { .left = IMX708_PIXEL_ARRAY_LEFT, .top = IMX708_PIXEL_ARRAY_TOP, .width = 4608, .height = 2592, }, .vblank_min = 58, .vblank_default = 58, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_4608x2592_regs), .regs = mode_4608x2592_regs, }, .pixel_rate = 595200000, .exposure_lines_min = 8, .exposure_lines_step = 1, .hdr = false, .remosaic = true }, { /* regular 2x2 binned. */ .width = 2304, .height = 1296, .line_length_pix = 5216, .crop = { .left = IMX708_PIXEL_ARRAY_LEFT, .top = IMX708_PIXEL_ARRAY_TOP, .width = 4608, .height = 2592, }, .vblank_min = 40, .vblank_default = 1198, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_2x2binned_regs), .regs = mode_2x2binned_regs, }, .pixel_rate = 585600000, .exposure_lines_min = 4, .exposure_lines_step = 2, .hdr = false, .remosaic = false }, { /* 2x2 binned and cropped for 720p. */ .width = 1536, .height = 864, .line_length_pix = 5216, .crop = { .left = IMX708_PIXEL_ARRAY_LEFT + 768, .top = IMX708_PIXEL_ARRAY_TOP + 432, .width = 3072, .height = 1728, }, .vblank_min = 40, .vblank_default = 2755, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_2x2binned_720p_regs), .regs = mode_2x2binned_720p_regs, }, .pixel_rate = 566400000, .exposure_lines_min = 4, .exposure_lines_step = 2, .hdr = false, .remosaic = false }, }; static const struct imx708_mode supported_modes_10bit_hdr[] = { { /* There's only one HDR mode, which is 2x2 downscaled */ .width = 2304, .height = 1296, .line_length_pix = 5216, .crop = { .left = IMX708_PIXEL_ARRAY_LEFT, .top = IMX708_PIXEL_ARRAY_TOP, .width = 4608, .height = 2592, }, .vblank_min = 3673, .vblank_default = 3673, .reg_list = { .num_of_regs = ARRAY_SIZE(mode_hdr_regs), .regs = mode_hdr_regs, }, .pixel_rate = 777600000, .exposure_lines_min = 8 * IMX708_HDR_EXPOSURE_RATIO * IMX708_HDR_EXPOSURE_RATIO, .exposure_lines_step = 2 * IMX708_HDR_EXPOSURE_RATIO * IMX708_HDR_EXPOSURE_RATIO, .hdr = true, .remosaic = false } }; /* * The supported formats. * This table MUST contain 4 entries per format, to cover the various flip * combinations in the order * - no flip * - h flip * - v flip * - h&v flips */ static const u32 codes[] = { /* 10-bit modes. */ MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, }; static const char * const imx708_test_pattern_menu[] = { "Disabled", "Color Bars", "Solid Color", "Grey Color Bars", "PN9" }; static const int imx708_test_pattern_val[] = { IMX708_TEST_PATTERN_DISABLE, IMX708_TEST_PATTERN_COLOR_BARS, IMX708_TEST_PATTERN_SOLID_COLOR, IMX708_TEST_PATTERN_GREY_COLOR, IMX708_TEST_PATTERN_PN9, }; /* regulator supplies */ static const char * const imx708_supply_name[] = { /* Supplies can be enabled in any order */ "vana1", /* Analog1 (2.8V) supply */ "vana2", /* Analog2 (1.8V) supply */ "vdig", /* Digital Core (1.1V) supply */ "vddl", /* IF (1.8V) supply */ }; /* * Initialisation delay between XCLR low->high and the moment when the sensor * can start capture (i.e. can leave software standby), given by T7 in the * datasheet is 8ms. This does include I2C setup time as well. * * Note, that delay between XCLR low->high and reading the CCI ID register (T6 * in the datasheet) is much smaller - 600us. */ #define IMX708_XCLR_MIN_DELAY_US 8000 #define IMX708_XCLR_DELAY_RANGE_US 1000 struct imx708 { struct v4l2_subdev sd; struct media_pad pad[NUM_PADS]; struct v4l2_mbus_framefmt fmt; struct clk *inclk; u32 inclk_freq; struct gpio_desc *reset_gpio; struct regulator_bulk_data supplies[ARRAY_SIZE(imx708_supply_name)]; struct v4l2_ctrl_handler ctrl_handler; /* V4L2 Controls */ struct v4l2_ctrl *pixel_rate; struct v4l2_ctrl *exposure; struct v4l2_ctrl *vblank; struct v4l2_ctrl *hblank; struct v4l2_ctrl *hdr_mode; struct v4l2_ctrl *link_freq; struct { struct v4l2_ctrl *hflip; struct v4l2_ctrl *vflip; }; /* Current mode */ const struct imx708_mode *mode; /* * Mutex for serialized access: * Protect sensor module set pad format and start/stop streaming safely. */ struct mutex mutex; /* Streaming on/off */ bool streaming; /* Rewrite common registers on stream on? */ bool common_regs_written; /* Current long exposure factor in use. Set through V4L2_CID_VBLANK */ unsigned int long_exp_shift; unsigned int link_freq_idx; }; static inline struct imx708 *to_imx708(struct v4l2_subdev *_sd) { return container_of(_sd, struct imx708, sd); } static inline void get_mode_table(unsigned int code, const struct imx708_mode **mode_list, unsigned int *num_modes, bool hdr_enable) { switch (code) { /* 10-bit */ case MEDIA_BUS_FMT_SRGGB10_1X10: case MEDIA_BUS_FMT_SGRBG10_1X10: case MEDIA_BUS_FMT_SGBRG10_1X10: case MEDIA_BUS_FMT_SBGGR10_1X10: if (hdr_enable) { *mode_list = supported_modes_10bit_hdr; *num_modes = ARRAY_SIZE(supported_modes_10bit_hdr); } else { *mode_list = supported_modes_10bit_no_hdr; *num_modes = ARRAY_SIZE(supported_modes_10bit_no_hdr); } break; default: *mode_list = NULL; *num_modes = 0; } } /* Read registers up to 2 at a time */ static int imx708_read_reg(struct imx708 *imx708, u16 reg, u32 len, u32 *val) { struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); struct i2c_msg msgs[2]; u8 addr_buf[2] = { reg >> 8, reg & 0xff }; u8 data_buf[4] = { 0, }; int ret; if (len > 4) return -EINVAL; /* Write register address */ msgs[0].addr = client->addr; msgs[0].flags = 0; msgs[0].len = ARRAY_SIZE(addr_buf); msgs[0].buf = addr_buf; /* Read data from register */ msgs[1].addr = client->addr; msgs[1].flags = I2C_M_RD; msgs[1].len = len; msgs[1].buf = &data_buf[4 - len]; ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); if (ret != ARRAY_SIZE(msgs)) return -EIO; *val = get_unaligned_be32(data_buf); return 0; } /* Write registers up to 2 at a time */ static int imx708_write_reg(struct imx708 *imx708, u16 reg, u32 len, u32 val) { struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); u8 buf[6]; if (len > 4) return -EINVAL; put_unaligned_be16(reg, buf); put_unaligned_be32(val << (8 * (4 - len)), buf + 2); if (i2c_master_send(client, buf, len + 2) != len + 2) return -EIO; return 0; } /* Write a list of registers */ static int imx708_write_regs(struct imx708 *imx708, const struct imx708_reg *regs, u32 len) { struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); unsigned int i; for (i = 0; i < len; i++) { int ret; ret = imx708_write_reg(imx708, regs[i].address, 1, regs[i].val); if (ret) { dev_err_ratelimited(&client->dev, "Failed to write reg 0x%4.4x. error = %d\n", regs[i].address, ret); return ret; } } return 0; } /* Get bayer order based on flip setting. */ static u32 imx708_get_format_code(struct imx708 *imx708) { unsigned int i; lockdep_assert_held(&imx708->mutex); i = (imx708->vflip->val ? 2 : 0) | (imx708->hflip->val ? 1 : 0); return codes[i]; } static void imx708_set_default_format(struct imx708 *imx708) { struct v4l2_mbus_framefmt *fmt = &imx708->fmt; /* Set default mode to max resolution */ imx708->mode = &supported_modes_10bit_no_hdr[0]; /* fmt->code not set as it will always be computed based on flips */ fmt->colorspace = V4L2_COLORSPACE_RAW; fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace); fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, fmt->colorspace, fmt->ycbcr_enc); fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace); fmt->width = imx708->mode->width; fmt->height = imx708->mode->height; fmt->field = V4L2_FIELD_NONE; } static int imx708_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct imx708 *imx708 = to_imx708(sd); struct v4l2_mbus_framefmt *try_fmt_img = v4l2_subdev_state_get_format(fh->state, IMAGE_PAD); struct v4l2_mbus_framefmt *try_fmt_meta = v4l2_subdev_state_get_format(fh->state, METADATA_PAD); struct v4l2_rect *try_crop; mutex_lock(&imx708->mutex); /* Initialize try_fmt for the image pad */ if (imx708->hdr_mode->val) { try_fmt_img->width = supported_modes_10bit_hdr[0].width; try_fmt_img->height = supported_modes_10bit_hdr[0].height; } else { try_fmt_img->width = supported_modes_10bit_no_hdr[0].width; try_fmt_img->height = supported_modes_10bit_no_hdr[0].height; } try_fmt_img->code = imx708_get_format_code(imx708); try_fmt_img->field = V4L2_FIELD_NONE; /* Initialize try_fmt for the embedded metadata pad */ try_fmt_meta->width = IMX708_EMBEDDED_LINE_WIDTH; try_fmt_meta->height = IMX708_NUM_EMBEDDED_LINES; try_fmt_meta->code = MEDIA_BUS_FMT_SENSOR_DATA; try_fmt_meta->field = V4L2_FIELD_NONE; /* Initialize try_crop */ try_crop = v4l2_subdev_state_get_crop(fh->state, IMAGE_PAD); try_crop->left = IMX708_PIXEL_ARRAY_LEFT; try_crop->top = IMX708_PIXEL_ARRAY_TOP; try_crop->width = IMX708_PIXEL_ARRAY_WIDTH; try_crop->height = IMX708_PIXEL_ARRAY_HEIGHT; mutex_unlock(&imx708->mutex); return 0; } static int imx708_set_exposure(struct imx708 *imx708, unsigned int val) { val = max(val, imx708->mode->exposure_lines_min); val -= val % imx708->mode->exposure_lines_step; /* * In HDR mode this will set the longest exposure. The sensor * will automatically divide the medium and short ones by 4,16. */ return imx708_write_reg(imx708, IMX708_REG_EXPOSURE, IMX708_REG_VALUE_16BIT, val >> imx708->long_exp_shift); } static void imx708_adjust_exposure_range(struct imx708 *imx708, struct v4l2_ctrl *ctrl) { int exposure_max, exposure_def; /* Honour the VBLANK limits when setting exposure. */ exposure_max = imx708->mode->height + imx708->vblank->val - IMX708_EXPOSURE_OFFSET; exposure_def = min(exposure_max, imx708->exposure->val); __v4l2_ctrl_modify_range(imx708->exposure, imx708->exposure->minimum, exposure_max, imx708->exposure->step, exposure_def); } static int imx708_set_analogue_gain(struct imx708 *imx708, unsigned int val) { int ret; /* * In HDR mode this will set the gain for the longest exposure, * and by default the sensor uses the same gain for all of them. */ ret = imx708_write_reg(imx708, IMX708_REG_ANALOG_GAIN, IMX708_REG_VALUE_16BIT, val); return ret; } static int imx708_set_frame_length(struct imx708 *imx708, unsigned int val) { int ret; imx708->long_exp_shift = 0; while (val > IMX708_FRAME_LENGTH_MAX) { imx708->long_exp_shift++; val >>= 1; } ret = imx708_write_reg(imx708, IMX708_REG_FRAME_LENGTH, IMX708_REG_VALUE_16BIT, val); if (ret) return ret; return imx708_write_reg(imx708, IMX708_LONG_EXP_SHIFT_REG, IMX708_REG_VALUE_08BIT, imx708->long_exp_shift); } static void imx708_set_framing_limits(struct imx708 *imx708) { const struct imx708_mode *mode = imx708->mode; unsigned int hblank; __v4l2_ctrl_modify_range(imx708->pixel_rate, mode->pixel_rate, mode->pixel_rate, 1, mode->pixel_rate); /* Update limits and set FPS to default */ __v4l2_ctrl_modify_range(imx708->vblank, mode->vblank_min, ((1 << IMX708_LONG_EXP_SHIFT_MAX) * IMX708_FRAME_LENGTH_MAX) - mode->height, 1, mode->vblank_default); hblank = mode->line_length_pix - mode->width; __v4l2_ctrl_modify_range(imx708->hblank, hblank, hblank, 1, hblank); } static int imx708_set_ctrl(struct v4l2_ctrl *ctrl) { struct imx708 *imx708 = container_of(ctrl->handler, struct imx708, ctrl_handler); struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); const struct imx708_mode *mode_list; unsigned int code, num_modes; int ret = 0; switch (ctrl->id) { case V4L2_CID_VBLANK: /* * The VBLANK control may change the limits of usable exposure, * so check and adjust if necessary. */ imx708_adjust_exposure_range(imx708, ctrl); break; case V4L2_CID_WIDE_DYNAMIC_RANGE: /* * The WIDE_DYNAMIC_RANGE control can also be applied immediately * as it doesn't set any registers. Don't do anything if the mode * already matches. */ if (imx708->mode && imx708->mode->hdr != ctrl->val) { code = imx708_get_format_code(imx708); get_mode_table(code, &mode_list, &num_modes, ctrl->val); imx708->mode = v4l2_find_nearest_size(mode_list, num_modes, width, height, imx708->mode->width, imx708->mode->height); imx708_set_framing_limits(imx708); } break; } /* * Applying V4L2 control value only happens * when power is up for streaming */ if (pm_runtime_get_if_in_use(&client->dev) == 0) return 0; switch (ctrl->id) { case V4L2_CID_ANALOGUE_GAIN: imx708_set_analogue_gain(imx708, ctrl->val); break; case V4L2_CID_EXPOSURE: ret = imx708_set_exposure(imx708, ctrl->val); break; case V4L2_CID_DIGITAL_GAIN: ret = imx708_write_reg(imx708, IMX708_REG_DIGITAL_GAIN, IMX708_REG_VALUE_16BIT, ctrl->val); break; case V4L2_CID_TEST_PATTERN: ret = imx708_write_reg(imx708, IMX708_REG_TEST_PATTERN, IMX708_REG_VALUE_16BIT, imx708_test_pattern_val[ctrl->val]); break; case V4L2_CID_TEST_PATTERN_RED: ret = imx708_write_reg(imx708, IMX708_REG_TEST_PATTERN_R, IMX708_REG_VALUE_16BIT, ctrl->val); break; case V4L2_CID_TEST_PATTERN_GREENR: ret = imx708_write_reg(imx708, IMX708_REG_TEST_PATTERN_GR, IMX708_REG_VALUE_16BIT, ctrl->val); break; case V4L2_CID_TEST_PATTERN_BLUE: ret = imx708_write_reg(imx708, IMX708_REG_TEST_PATTERN_B, IMX708_REG_VALUE_16BIT, ctrl->val); break; case V4L2_CID_TEST_PATTERN_GREENB: ret = imx708_write_reg(imx708, IMX708_REG_TEST_PATTERN_GB, IMX708_REG_VALUE_16BIT, ctrl->val); break; case V4L2_CID_HFLIP: case V4L2_CID_VFLIP: ret = imx708_write_reg(imx708, IMX708_REG_ORIENTATION, 1, imx708->hflip->val | imx708->vflip->val << 1); break; case V4L2_CID_VBLANK: ret = imx708_set_frame_length(imx708, imx708->mode->height + ctrl->val); break; case V4L2_CID_HBLANK: ret = imx708_write_reg(imx708, IMX708_REG_LINE_LENGTH, 2, imx708->mode->width + ctrl->val); break; case V4L2_CID_NOTIFY_GAINS: ret = imx708_write_reg(imx708, IMX708_REG_COLOUR_BALANCE_BLUE, IMX708_REG_VALUE_16BIT, ctrl->p_new.p_u32[0]); if (ret) break; ret = imx708_write_reg(imx708, IMX708_REG_COLOUR_BALANCE_RED, IMX708_REG_VALUE_16BIT, ctrl->p_new.p_u32[3]); break; case V4L2_CID_WIDE_DYNAMIC_RANGE: /* Already handled above. */ break; default: dev_info(&client->dev, "ctrl(id:0x%x,val:0x%x) is not handled\n", ctrl->id, ctrl->val); ret = -EINVAL; break; } pm_runtime_put(&client->dev); return ret; } static const struct v4l2_ctrl_ops imx708_ctrl_ops = { .s_ctrl = imx708_set_ctrl, }; static int imx708_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { struct imx708 *imx708 = to_imx708(sd); if (code->pad >= NUM_PADS) return -EINVAL; if (code->pad == IMAGE_PAD) { if (code->index >= (ARRAY_SIZE(codes) / 4)) return -EINVAL; code->code = imx708_get_format_code(imx708); } else { if (code->index > 0) return -EINVAL; code->code = MEDIA_BUS_FMT_SENSOR_DATA; } return 0; } static int imx708_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fse) { struct imx708 *imx708 = to_imx708(sd); if (fse->pad >= NUM_PADS) return -EINVAL; if (fse->pad == IMAGE_PAD) { const struct imx708_mode *mode_list; unsigned int num_modes; get_mode_table(fse->code, &mode_list, &num_modes, imx708->hdr_mode->val); if (fse->index >= num_modes) return -EINVAL; if (fse->code != imx708_get_format_code(imx708)) return -EINVAL; fse->min_width = mode_list[fse->index].width; fse->max_width = fse->min_width; fse->min_height = mode_list[fse->index].height; fse->max_height = fse->min_height; } else { if (fse->code != MEDIA_BUS_FMT_SENSOR_DATA || fse->index > 0) return -EINVAL; fse->min_width = IMX708_EMBEDDED_LINE_WIDTH; fse->max_width = fse->min_width; fse->min_height = IMX708_NUM_EMBEDDED_LINES; fse->max_height = fse->min_height; } return 0; } static void imx708_reset_colorspace(struct v4l2_mbus_framefmt *fmt) { fmt->colorspace = V4L2_COLORSPACE_RAW; fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace); fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, fmt->colorspace, fmt->ycbcr_enc); fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace); } static void imx708_update_image_pad_format(struct imx708 *imx708, const struct imx708_mode *mode, struct v4l2_subdev_format *fmt) { fmt->format.width = mode->width; fmt->format.height = mode->height; fmt->format.field = V4L2_FIELD_NONE; imx708_reset_colorspace(&fmt->format); } static void imx708_update_metadata_pad_format(struct v4l2_subdev_format *fmt) { fmt->format.width = IMX708_EMBEDDED_LINE_WIDTH; fmt->format.height = IMX708_NUM_EMBEDDED_LINES; fmt->format.code = MEDIA_BUS_FMT_SENSOR_DATA; fmt->format.field = V4L2_FIELD_NONE; } static int imx708_get_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct imx708 *imx708 = to_imx708(sd); if (fmt->pad >= NUM_PADS) return -EINVAL; mutex_lock(&imx708->mutex); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { struct v4l2_mbus_framefmt *try_fmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); /* update the code which could change due to vflip or hflip */ try_fmt->code = fmt->pad == IMAGE_PAD ? imx708_get_format_code(imx708) : MEDIA_BUS_FMT_SENSOR_DATA; fmt->format = *try_fmt; } else { if (fmt->pad == IMAGE_PAD) { imx708_update_image_pad_format(imx708, imx708->mode, fmt); fmt->format.code = imx708_get_format_code(imx708); } else { imx708_update_metadata_pad_format(fmt); } } mutex_unlock(&imx708->mutex); return 0; } static int imx708_set_pad_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct v4l2_mbus_framefmt *framefmt; const struct imx708_mode *mode; struct imx708 *imx708 = to_imx708(sd); if (fmt->pad >= NUM_PADS) return -EINVAL; mutex_lock(&imx708->mutex); if (fmt->pad == IMAGE_PAD) { const struct imx708_mode *mode_list; unsigned int num_modes; /* Bayer order varies with flips */ fmt->format.code = imx708_get_format_code(imx708); get_mode_table(fmt->format.code, &mode_list, &num_modes, imx708->hdr_mode->val); mode = v4l2_find_nearest_size(mode_list, num_modes, width, height, fmt->format.width, fmt->format.height); imx708_update_image_pad_format(imx708, mode, fmt); if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); *framefmt = fmt->format; } else { imx708->mode = mode; imx708_set_framing_limits(imx708); } } else { if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { framefmt = v4l2_subdev_state_get_format(sd_state, fmt->pad); *framefmt = fmt->format; } else { /* Only one embedded data mode is supported */ imx708_update_metadata_pad_format(fmt); } } mutex_unlock(&imx708->mutex); return 0; } static const struct v4l2_rect * __imx708_get_pad_crop(struct imx708 *imx708, struct v4l2_subdev_state *sd_state, unsigned int pad, enum v4l2_subdev_format_whence which) { switch (which) { case V4L2_SUBDEV_FORMAT_TRY: return v4l2_subdev_state_get_crop(sd_state, pad); case V4L2_SUBDEV_FORMAT_ACTIVE: return &imx708->mode->crop; } return NULL; } static int imx708_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_selection *sel) { switch (sel->target) { case V4L2_SEL_TGT_CROP: { struct imx708 *imx708 = to_imx708(sd); mutex_lock(&imx708->mutex); sel->r = *__imx708_get_pad_crop(imx708, sd_state, sel->pad, sel->which); mutex_unlock(&imx708->mutex); return 0; } case V4L2_SEL_TGT_NATIVE_SIZE: sel->r.left = 0; sel->r.top = 0; sel->r.width = IMX708_NATIVE_WIDTH; sel->r.height = IMX708_NATIVE_HEIGHT; return 0; case V4L2_SEL_TGT_CROP_DEFAULT: case V4L2_SEL_TGT_CROP_BOUNDS: sel->r.left = IMX708_PIXEL_ARRAY_LEFT; sel->r.top = IMX708_PIXEL_ARRAY_TOP; sel->r.width = IMX708_PIXEL_ARRAY_WIDTH; sel->r.height = IMX708_PIXEL_ARRAY_HEIGHT; return 0; } return -EINVAL; } /* Start streaming */ static int imx708_start_streaming(struct imx708 *imx708) { struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); const struct imx708_reg_list *reg_list, *freq_regs; int i, ret; u32 val; if (!imx708->common_regs_written) { ret = imx708_write_regs(imx708, mode_common_regs, ARRAY_SIZE(mode_common_regs)); if (ret) { dev_err(&client->dev, "%s failed to set common settings\n", __func__); return ret; } ret = imx708_read_reg(imx708, IMX708_REG_BASE_SPC_GAINS_L, IMX708_REG_VALUE_08BIT, &val); if (ret == 0 && val == 0x40) { for (i = 0; i < 54 && ret == 0; i++) { ret = imx708_write_reg(imx708, IMX708_REG_BASE_SPC_GAINS_L + i, IMX708_REG_VALUE_08BIT, pdaf_gains[0][i % 9]); } for (i = 0; i < 54 && ret == 0; i++) { ret = imx708_write_reg(imx708, IMX708_REG_BASE_SPC_GAINS_R + i, IMX708_REG_VALUE_08BIT, pdaf_gains[1][i % 9]); } } if (ret) { dev_err(&client->dev, "%s failed to set PDAF gains\n", __func__); return ret; } imx708->common_regs_written = true; } /* Apply default values of current mode */ reg_list = &imx708->mode->reg_list; ret = imx708_write_regs(imx708, reg_list->regs, reg_list->num_of_regs); if (ret) { dev_err(&client->dev, "%s failed to set mode\n", __func__); return ret; } /* Update the link frequency registers */ freq_regs = &link_freq_regs[imx708->link_freq_idx]; ret = imx708_write_regs(imx708, freq_regs->regs, freq_regs->num_of_regs); if (ret) { dev_err(&client->dev, "%s failed to set link frequency registers\n", __func__); return ret; } /* Quad Bayer re-mosaic adjustments (for full-resolution mode only) */ if (imx708->mode->remosaic && qbc_adjust > 0) { imx708_write_reg(imx708, IMX708_LPF_INTENSITY, IMX708_REG_VALUE_08BIT, qbc_adjust); imx708_write_reg(imx708, IMX708_LPF_INTENSITY_EN, IMX708_REG_VALUE_08BIT, IMX708_LPF_INTENSITY_ENABLED); } else { imx708_write_reg(imx708, IMX708_LPF_INTENSITY_EN, IMX708_REG_VALUE_08BIT, IMX708_LPF_INTENSITY_DISABLED); } /* Apply customized values from user */ ret = __v4l2_ctrl_handler_setup(imx708->sd.ctrl_handler); if (ret) return ret; /* set stream on register */ return imx708_write_reg(imx708, IMX708_REG_MODE_SELECT, IMX708_REG_VALUE_08BIT, IMX708_MODE_STREAMING); } /* Stop streaming */ static void imx708_stop_streaming(struct imx708 *imx708) { struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); int ret; /* set stream off register */ ret = imx708_write_reg(imx708, IMX708_REG_MODE_SELECT, IMX708_REG_VALUE_08BIT, IMX708_MODE_STANDBY); if (ret) dev_err(&client->dev, "%s failed to set stream\n", __func__); } static int imx708_set_stream(struct v4l2_subdev *sd, int enable) { struct imx708 *imx708 = to_imx708(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); int ret = 0; mutex_lock(&imx708->mutex); if (imx708->streaming == enable) { mutex_unlock(&imx708->mutex); return 0; } if (enable) { ret = pm_runtime_get_sync(&client->dev); if (ret < 0) { pm_runtime_put_noidle(&client->dev); goto err_unlock; } /* * Apply default & customized values * and then start streaming. */ ret = imx708_start_streaming(imx708); if (ret) goto err_rpm_put; } else { imx708_stop_streaming(imx708); pm_runtime_put(&client->dev); } imx708->streaming = enable; /* vflip/hflip and hdr mode cannot change during streaming */ __v4l2_ctrl_grab(imx708->vflip, enable); __v4l2_ctrl_grab(imx708->hflip, enable); __v4l2_ctrl_grab(imx708->hdr_mode, enable); mutex_unlock(&imx708->mutex); return ret; err_rpm_put: pm_runtime_put(&client->dev); err_unlock: mutex_unlock(&imx708->mutex); return ret; } /* Power/clock management functions */ static int imx708_power_on(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct imx708 *imx708 = to_imx708(sd); int ret; ret = regulator_bulk_enable(ARRAY_SIZE(imx708_supply_name), imx708->supplies); if (ret) { dev_err(&client->dev, "%s: failed to enable regulators\n", __func__); return ret; } ret = clk_prepare_enable(imx708->inclk); if (ret) { dev_err(&client->dev, "%s: failed to enable clock\n", __func__); goto reg_off; } gpiod_set_value_cansleep(imx708->reset_gpio, 1); usleep_range(IMX708_XCLR_MIN_DELAY_US, IMX708_XCLR_MIN_DELAY_US + IMX708_XCLR_DELAY_RANGE_US); return 0; reg_off: regulator_bulk_disable(ARRAY_SIZE(imx708_supply_name), imx708->supplies); return ret; } static int imx708_power_off(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct imx708 *imx708 = to_imx708(sd); gpiod_set_value_cansleep(imx708->reset_gpio, 0); regulator_bulk_disable(ARRAY_SIZE(imx708_supply_name), imx708->supplies); clk_disable_unprepare(imx708->inclk); /* Force reprogramming of the common registers when powered up again. */ imx708->common_regs_written = false; return 0; } static int __maybe_unused imx708_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct imx708 *imx708 = to_imx708(sd); if (imx708->streaming) imx708_stop_streaming(imx708); return 0; } static int __maybe_unused imx708_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct v4l2_subdev *sd = i2c_get_clientdata(client); struct imx708 *imx708 = to_imx708(sd); int ret; if (imx708->streaming) { ret = imx708_start_streaming(imx708); if (ret) goto error; } return 0; error: imx708_stop_streaming(imx708); imx708->streaming = 0; return ret; } static int imx708_get_regulators(struct imx708 *imx708) { struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); unsigned int i; for (i = 0; i < ARRAY_SIZE(imx708_supply_name); i++) imx708->supplies[i].supply = imx708_supply_name[i]; return devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(imx708_supply_name), imx708->supplies); } /* Verify chip ID */ static int imx708_identify_module(struct imx708 *imx708) { struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); int ret; u32 val; ret = imx708_read_reg(imx708, IMX708_REG_CHIP_ID, IMX708_REG_VALUE_16BIT, &val); if (ret) { dev_err(&client->dev, "failed to read chip id %x, with error %d\n", IMX708_CHIP_ID, ret); return ret; } if (val != IMX708_CHIP_ID) { dev_err(&client->dev, "chip id mismatch: %x!=%x\n", IMX708_CHIP_ID, val); return -EIO; } ret = imx708_read_reg(imx708, 0x0000, IMX708_REG_VALUE_16BIT, &val); if (!ret) { dev_info(&client->dev, "camera module ID 0x%04x\n", val); snprintf(imx708->sd.name, sizeof(imx708->sd.name), "imx708%s%s", val & 0x02 ? "_wide" : "", val & 0x80 ? "_noir" : ""); } return 0; } static const struct v4l2_subdev_core_ops imx708_core_ops = { .subscribe_event = v4l2_ctrl_subdev_subscribe_event, .unsubscribe_event = v4l2_event_subdev_unsubscribe, }; static const struct v4l2_subdev_video_ops imx708_video_ops = { .s_stream = imx708_set_stream, }; static const struct v4l2_subdev_pad_ops imx708_pad_ops = { .enum_mbus_code = imx708_enum_mbus_code, .get_fmt = imx708_get_pad_format, .set_fmt = imx708_set_pad_format, .get_selection = imx708_get_selection, .enum_frame_size = imx708_enum_frame_size, }; static const struct v4l2_subdev_ops imx708_subdev_ops = { .core = &imx708_core_ops, .video = &imx708_video_ops, .pad = &imx708_pad_ops, }; static const struct v4l2_subdev_internal_ops imx708_internal_ops = { .open = imx708_open, }; static const struct v4l2_ctrl_config imx708_notify_gains_ctrl = { .ops = &imx708_ctrl_ops, .id = V4L2_CID_NOTIFY_GAINS, .type = V4L2_CTRL_TYPE_U32, .min = IMX708_COLOUR_BALANCE_MIN, .max = IMX708_COLOUR_BALANCE_MAX, .step = IMX708_COLOUR_BALANCE_STEP, .def = IMX708_COLOUR_BALANCE_DEFAULT, .dims = { 4 }, .elem_size = sizeof(u32), }; /* Initialize control handlers */ static int imx708_init_controls(struct imx708 *imx708) { struct v4l2_ctrl_handler *ctrl_hdlr; struct i2c_client *client = v4l2_get_subdevdata(&imx708->sd); struct v4l2_fwnode_device_properties props; struct v4l2_ctrl *ctrl; unsigned int i; int ret; ctrl_hdlr = &imx708->ctrl_handler; ret = v4l2_ctrl_handler_init(ctrl_hdlr, 16); if (ret) return ret; mutex_init(&imx708->mutex); ctrl_hdlr->lock = &imx708->mutex; /* By default, PIXEL_RATE is read only */ imx708->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_PIXEL_RATE, IMX708_INITIAL_PIXEL_RATE, IMX708_INITIAL_PIXEL_RATE, 1, IMX708_INITIAL_PIXEL_RATE); ctrl = v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_LINK_FREQ, 0, 0, &link_freqs[imx708->link_freq_idx]); if (ctrl) ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; /* * Create the controls here, but mode specific limits are setup * in the imx708_set_framing_limits() call below. */ imx708->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_VBLANK, 0, 0xffff, 1, 0); imx708->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_HBLANK, 0, 0xffff, 1, 0); imx708->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_EXPOSURE, IMX708_EXPOSURE_MIN, IMX708_EXPOSURE_MAX, IMX708_EXPOSURE_STEP, IMX708_EXPOSURE_DEFAULT); v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, IMX708_ANA_GAIN_MIN, IMX708_ANA_GAIN_MAX, IMX708_ANA_GAIN_STEP, IMX708_ANA_GAIN_DEFAULT); v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_DIGITAL_GAIN, IMX708_DGTL_GAIN_MIN, IMX708_DGTL_GAIN_MAX, IMX708_DGTL_GAIN_STEP, IMX708_DGTL_GAIN_DEFAULT); imx708->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0); imx708->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0); v4l2_ctrl_cluster(2, &imx708->hflip); v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_TEST_PATTERN, ARRAY_SIZE(imx708_test_pattern_menu) - 1, 0, 0, imx708_test_pattern_menu); for (i = 0; i < 4; i++) { /* * The assumption is that * V4L2_CID_TEST_PATTERN_GREENR == V4L2_CID_TEST_PATTERN_RED + 1 * V4L2_CID_TEST_PATTERN_BLUE == V4L2_CID_TEST_PATTERN_RED + 2 * V4L2_CID_TEST_PATTERN_GREENB == V4L2_CID_TEST_PATTERN_RED + 3 */ v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_TEST_PATTERN_RED + i, IMX708_TEST_PATTERN_COLOUR_MIN, IMX708_TEST_PATTERN_COLOUR_MAX, IMX708_TEST_PATTERN_COLOUR_STEP, IMX708_TEST_PATTERN_COLOUR_MAX); /* The "Solid color" pattern is white by default */ } v4l2_ctrl_new_custom(ctrl_hdlr, &imx708_notify_gains_ctrl, NULL); imx708->hdr_mode = v4l2_ctrl_new_std(ctrl_hdlr, &imx708_ctrl_ops, V4L2_CID_WIDE_DYNAMIC_RANGE, 0, 1, 1, 0); ret = v4l2_fwnode_device_parse(&client->dev, &props); if (ret) goto error; v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &imx708_ctrl_ops, &props); if (ctrl_hdlr->error) { ret = ctrl_hdlr->error; dev_err(&client->dev, "%s control init failed (%d)\n", __func__, ret); goto error; } imx708->hflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; imx708->vflip->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; imx708->hdr_mode->flags |= V4L2_CTRL_FLAG_MODIFY_LAYOUT; imx708->sd.ctrl_handler = ctrl_hdlr; /* Setup exposure and frame/line length limits. */ imx708_set_framing_limits(imx708); return 0; error: v4l2_ctrl_handler_free(ctrl_hdlr); mutex_destroy(&imx708->mutex); return ret; } static void imx708_free_controls(struct imx708 *imx708) { v4l2_ctrl_handler_free(imx708->sd.ctrl_handler); mutex_destroy(&imx708->mutex); } static int imx708_check_hwcfg(struct device *dev, struct imx708 *imx708) { struct fwnode_handle *endpoint; struct v4l2_fwnode_endpoint ep_cfg = { .bus_type = V4L2_MBUS_CSI2_DPHY }; int ret = -EINVAL; int i; endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); if (!endpoint) { dev_err(dev, "endpoint node not found\n"); return -EINVAL; } if (v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep_cfg)) { dev_err(dev, "could not parse endpoint\n"); goto error_out; } /* Check the number of MIPI CSI2 data lanes */ if (ep_cfg.bus.mipi_csi2.num_data_lanes != 2 && ep_cfg.bus.mipi_csi2.num_data_lanes != 4) { dev_err(dev, "only 2 or 4 data lanes are supported\n"); goto error_out; } /* Check the link frequency set in device tree */ if (!ep_cfg.nr_of_link_frequencies) { dev_err(dev, "link-frequency property not found in DT\n"); goto error_out; } for (i = 0; i < ARRAY_SIZE(link_freqs); i++) { if (link_freqs[i] == ep_cfg.link_frequencies[0]) { imx708->link_freq_idx = i; break; } } if (i == ARRAY_SIZE(link_freqs)) { dev_err(dev, "Link frequency not supported: %lld\n", ep_cfg.link_frequencies[0]); ret = -EINVAL; goto error_out; } ret = 0; error_out: v4l2_fwnode_endpoint_free(&ep_cfg); fwnode_handle_put(endpoint); return ret; } static int imx708_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct imx708 *imx708; int ret; imx708 = devm_kzalloc(&client->dev, sizeof(*imx708), GFP_KERNEL); if (!imx708) return -ENOMEM; v4l2_i2c_subdev_init(&imx708->sd, client, &imx708_subdev_ops); /* Check the hardware configuration in device tree */ if (imx708_check_hwcfg(dev, imx708)) return -EINVAL; /* Get system clock (inclk) */ imx708->inclk = devm_clk_get(dev, "inclk"); if (IS_ERR(imx708->inclk)) return dev_err_probe(dev, PTR_ERR(imx708->inclk), "failed to get inclk\n"); imx708->inclk_freq = clk_get_rate(imx708->inclk); if (imx708->inclk_freq != IMX708_INCLK_FREQ) return dev_err_probe(dev, -EINVAL, "inclk frequency not supported: %d Hz\n", imx708->inclk_freq); ret = imx708_get_regulators(imx708); if (ret) return dev_err_probe(dev, ret, "failed to get regulators\n"); /* Request optional enable pin */ imx708->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); /* * The sensor must be powered for imx708_identify_module() * to be able to read the CHIP_ID register */ ret = imx708_power_on(dev); if (ret) return ret; ret = imx708_identify_module(imx708); if (ret) goto error_power_off; /* Initialize default format */ imx708_set_default_format(imx708); /* Enable runtime PM and turn off the device */ pm_runtime_set_active(dev); pm_runtime_enable(dev); pm_runtime_idle(dev); /* This needs the pm runtime to be registered. */ ret = imx708_init_controls(imx708); if (ret) goto error_pm_runtime; /* Initialize subdev */ imx708->sd.internal_ops = &imx708_internal_ops; imx708->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; imx708->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; /* Initialize source pads */ imx708->pad[IMAGE_PAD].flags = MEDIA_PAD_FL_SOURCE; imx708->pad[METADATA_PAD].flags = MEDIA_PAD_FL_SOURCE; ret = media_entity_pads_init(&imx708->sd.entity, NUM_PADS, imx708->pad); if (ret) { dev_err(dev, "failed to init entity pads: %d\n", ret); goto error_handler_free; } ret = v4l2_async_register_subdev_sensor(&imx708->sd); if (ret < 0) { dev_err(dev, "failed to register sensor sub-device: %d\n", ret); goto error_media_entity; } return 0; error_media_entity: media_entity_cleanup(&imx708->sd.entity); error_handler_free: imx708_free_controls(imx708); error_pm_runtime: pm_runtime_disable(&client->dev); pm_runtime_set_suspended(&client->dev); error_power_off: imx708_power_off(&client->dev); return ret; } static void imx708_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct imx708 *imx708 = to_imx708(sd); v4l2_async_unregister_subdev(sd); media_entity_cleanup(&sd->entity); imx708_free_controls(imx708); pm_runtime_disable(&client->dev); if (!pm_runtime_status_suspended(&client->dev)) imx708_power_off(&client->dev); pm_runtime_set_suspended(&client->dev); } static const struct of_device_id imx708_dt_ids[] = { { .compatible = "sony,imx708" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, imx708_dt_ids); static const struct dev_pm_ops imx708_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(imx708_suspend, imx708_resume) SET_RUNTIME_PM_OPS(imx708_power_off, imx708_power_on, NULL) }; static struct i2c_driver imx708_i2c_driver = { .driver = { .name = "imx708", .of_match_table = imx708_dt_ids, .pm = &imx708_pm_ops, }, .probe = imx708_probe, .remove = imx708_remove, }; module_i2c_driver(imx708_i2c_driver); MODULE_AUTHOR("David Plowman "); MODULE_DESCRIPTION("Sony IMX708 sensor driver"); MODULE_LICENSE("GPL v2");