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Date: Fri, 23 Feb 2024 13:23:57 +0200
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Mikhail Rudenko <mike.rudenko@gmail.com>
Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Jacopo Mondi <jacopo@jmondi.org>,
	Tommaso Merciai <tomm.merciai@gmail.com>,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
	Dave Stevenson <dave.stevenson@raspberrypi.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>
Subject: Re: [PATCH v2 01/20] media: i2c: ov4689: Clean up and annotate the
 register table
Message-ID: <20240223112357.GN31348@pendragon.ideasonboard.com>
References: <20231218174042.794012-1-mike.rudenko@gmail.com>
 <20231218174042.794012-2-mike.rudenko@gmail.com>
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In-Reply-To: <20231218174042.794012-2-mike.rudenko@gmail.com>

HiMikhail,

Thank you for the patch.

On Mon, Dec 18, 2023 at 08:40:22PM +0300, Mikhail Rudenko wrote:
> Many values in the register table are actually power-on
> defaults. Remove those and also unused HDR exposures and gains.
> Annotate the remaining values using the publicly available datasheet
> to facilitate further development. No functional change intended.

I'll trust you on that as I can't test the patch.

> Signed-off-by: Mikhail Rudenko <mike.rudenko@gmail.com>
> ---
>  drivers/media/i2c/ov4689.c | 203 +++++++++++++++++++++----------------
>  1 file changed, 118 insertions(+), 85 deletions(-)
> 
> diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c
> index 403091651885..ff5213862974 100644
> --- a/drivers/media/i2c/ov4689.c
> +++ b/drivers/media/i2c/ov4689.c
> @@ -3,7 +3,7 @@
>   * ov4689 driver
>   *
>   * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
> - * Copyright (C) 2022 Mikhail Rudenko
> + * Copyright (C) 2022, 2023 Mikhail Rudenko
>   */
>  
>  #include <linux/clk.h>
> @@ -123,90 +123,123 @@ struct ov4689_gain_range {
>   * mipi_datarate per lane 1008Mbps
>   */
>  static const struct regval ov4689_2688x1520_regs[] = {
> -	{0x0103, 0x01}, {0x3638, 0x00}, {0x0300, 0x00},
> -	{0x0302, 0x2a}, {0x0303, 0x00}, {0x0304, 0x03},
> -	{0x030b, 0x00}, {0x030d, 0x1e}, {0x030e, 0x04},
> -	{0x030f, 0x01}, {0x0312, 0x01}, {0x031e, 0x00},
> -	{0x3000, 0x20}, {0x3002, 0x00}, {0x3018, 0x72},
> -	{0x3020, 0x93}, {0x3021, 0x03}, {0x3022, 0x01},
> -	{0x3031, 0x0a}, {0x303f, 0x0c}, {0x3305, 0xf1},
> -	{0x3307, 0x04}, {0x3309, 0x29}, {0x3500, 0x00},
> -	{0x3501, 0x60}, {0x3502, 0x00}, {0x3503, 0x04},
> -	{0x3504, 0x00}, {0x3505, 0x00}, {0x3506, 0x00},
> -	{0x3507, 0x00}, {0x3508, 0x00}, {0x3509, 0x80},
> -	{0x350a, 0x00}, {0x350b, 0x00}, {0x350c, 0x00},
> -	{0x350d, 0x00}, {0x350e, 0x00}, {0x350f, 0x80},
> -	{0x3510, 0x00}, {0x3511, 0x00}, {0x3512, 0x00},
> -	{0x3513, 0x00}, {0x3514, 0x00}, {0x3515, 0x80},
> -	{0x3516, 0x00}, {0x3517, 0x00}, {0x3518, 0x00},
> -	{0x3519, 0x00}, {0x351a, 0x00}, {0x351b, 0x80},
> -	{0x351c, 0x00}, {0x351d, 0x00}, {0x351e, 0x00},
> -	{0x351f, 0x00}, {0x3520, 0x00}, {0x3521, 0x80},
> -	{0x3522, 0x08}, {0x3524, 0x08}, {0x3526, 0x08},
> -	{0x3528, 0x08}, {0x352a, 0x08}, {0x3602, 0x00},
> -	{0x3603, 0x40}, {0x3604, 0x02}, {0x3605, 0x00},
> -	{0x3606, 0x00}, {0x3607, 0x00}, {0x3609, 0x12},
> -	{0x360a, 0x40}, {0x360c, 0x08}, {0x360f, 0xe5},
> -	{0x3608, 0x8f}, {0x3611, 0x00}, {0x3613, 0xf7},
> -	{0x3616, 0x58}, {0x3619, 0x99}, {0x361b, 0x60},
> -	{0x361c, 0x7a}, {0x361e, 0x79}, {0x361f, 0x02},
> -	{0x3632, 0x00}, {0x3633, 0x10}, {0x3634, 0x10},
> -	{0x3635, 0x10}, {0x3636, 0x15}, {0x3646, 0x86},
> -	{0x364a, 0x0b}, {0x3700, 0x17}, {0x3701, 0x22},
> -	{0x3703, 0x10}, {0x370a, 0x37}, {0x3705, 0x00},
> -	{0x3706, 0x63}, {0x3709, 0x3c}, {0x370b, 0x01},
> -	{0x370c, 0x30}, {0x3710, 0x24}, {0x3711, 0x0c},
> -	{0x3716, 0x00}, {0x3720, 0x28}, {0x3729, 0x7b},
> -	{0x372a, 0x84}, {0x372b, 0xbd}, {0x372c, 0xbc},
> -	{0x372e, 0x52}, {0x373c, 0x0e}, {0x373e, 0x33},
> -	{0x3743, 0x10}, {0x3744, 0x88}, {0x3745, 0xc0},
> -	{0x374a, 0x43}, {0x374c, 0x00}, {0x374e, 0x23},
> -	{0x3751, 0x7b}, {0x3752, 0x84}, {0x3753, 0xbd},
> -	{0x3754, 0xbc}, {0x3756, 0x52}, {0x375c, 0x00},
> -	{0x3760, 0x00}, {0x3761, 0x00}, {0x3762, 0x00},
> -	{0x3763, 0x00}, {0x3764, 0x00}, {0x3767, 0x04},
> -	{0x3768, 0x04}, {0x3769, 0x08}, {0x376a, 0x08},
> -	{0x376b, 0x20}, {0x376c, 0x00}, {0x376d, 0x00},
> -	{0x376e, 0x00}, {0x3773, 0x00}, {0x3774, 0x51},
> -	{0x3776, 0xbd}, {0x3777, 0xbd}, {0x3781, 0x18},
> -	{0x3783, 0x25}, {0x3798, 0x1b}, {0x3800, 0x00},
> -	{0x3801, 0x08}, {0x3802, 0x00}, {0x3803, 0x04},
> -	{0x3804, 0x0a}, {0x3805, 0x97}, {0x3806, 0x05},
> -	{0x3807, 0xfb}, {0x3808, 0x0a}, {0x3809, 0x80},
> -	{0x380a, 0x05}, {0x380b, 0xf0}, {0x380c, 0x0a},
> -	{0x380d, 0x0e}, {0x380e, 0x06}, {0x380f, 0x12},
> -	{0x3810, 0x00}, {0x3811, 0x08}, {0x3812, 0x00},
> -	{0x3813, 0x04}, {0x3814, 0x01}, {0x3815, 0x01},
> -	{0x3819, 0x01}, {0x3820, 0x00}, {0x3821, 0x06},
> -	{0x3829, 0x00}, {0x382a, 0x01}, {0x382b, 0x01},
> -	{0x382d, 0x7f}, {0x3830, 0x04}, {0x3836, 0x01},
> -	{0x3837, 0x00}, {0x3841, 0x02}, {0x3846, 0x08},
> -	{0x3847, 0x07}, {0x3d85, 0x36}, {0x3d8c, 0x71},
> -	{0x3d8d, 0xcb}, {0x3f0a, 0x00}, {0x4000, 0xf1},
> -	{0x4001, 0x40}, {0x4002, 0x04}, {0x4003, 0x14},
> -	{0x400e, 0x00}, {0x4011, 0x00}, {0x401a, 0x00},
> -	{0x401b, 0x00}, {0x401c, 0x00}, {0x401d, 0x00},
> -	{0x401f, 0x00}, {0x4020, 0x00}, {0x4021, 0x10},
> -	{0x4022, 0x07}, {0x4023, 0xcf}, {0x4024, 0x09},
> -	{0x4025, 0x60}, {0x4026, 0x09}, {0x4027, 0x6f},
> -	{0x4028, 0x00}, {0x4029, 0x02}, {0x402a, 0x06},
> -	{0x402b, 0x04}, {0x402c, 0x02}, {0x402d, 0x02},
> -	{0x402e, 0x0e}, {0x402f, 0x04}, {0x4302, 0xff},
> -	{0x4303, 0xff}, {0x4304, 0x00}, {0x4305, 0x00},
> -	{0x4306, 0x00}, {0x4308, 0x02}, {0x4500, 0x6c},
> -	{0x4501, 0xc4}, {0x4502, 0x40}, {0x4503, 0x01},
> -	{0x4601, 0xa7}, {0x4800, 0x04}, {0x4813, 0x08},
> -	{0x481f, 0x40}, {0x4829, 0x78}, {0x4837, 0x10},
> -	{0x4b00, 0x2a}, {0x4b0d, 0x00}, {0x4d00, 0x04},
> -	{0x4d01, 0x42}, {0x4d02, 0xd1}, {0x4d03, 0x93},
> -	{0x4d04, 0xf5}, {0x4d05, 0xc1}, {0x5000, 0xf3},
> -	{0x5001, 0x11}, {0x5004, 0x00}, {0x500a, 0x00},
> -	{0x500b, 0x00}, {0x5032, 0x00}, {0x5040, 0x00},
> -	{0x5050, 0x0c}, {0x5500, 0x00}, {0x5501, 0x10},
> -	{0x5502, 0x01}, {0x5503, 0x0f}, {0x8000, 0x00},
> -	{0x8001, 0x00}, {0x8002, 0x00}, {0x8003, 0x00},
> -	{0x8004, 0x00}, {0x8005, 0x00}, {0x8006, 0x00},
> -	{0x8007, 0x00}, {0x8008, 0x00}, {0x3638, 0x00},
> +	/* System control*/
> +	{0x0103, 0x01}, /* SC_CTRL0103 software_reset = 1 */
> +	{0x3000, 0x20}, /* SC_CMMN_PAD_OEN0 FSIN_output_enable = 1 */
> +	{0x3021, 0x03}, /*
> +			 * SC_CMMN_MISC_CTRL fst_stby_ctr = 0,
> +			 * sleep_no_latch_enable = 0
> +			 */
> +
> +	/* AEC PK */
> +	{0x3503, 0x04}, /* AEC_MANUAL gain_input_as_sensor_gain_format = 1 */
> +	{0x352a, 0x08}, /* DIG_GAIN_FRAC_LONG dig_gain_long[14:8] = 0x08 (2x) */
> +
> +	/* ADC and analog control*/
> +	{0x3603, 0x40},
> +	{0x3604, 0x02},
> +	{0x3609, 0x12},
> +	{0x360c, 0x08},
> +	{0x360f, 0xe5},
> +	{0x3608, 0x8f},
> +	{0x3611, 0x00},
> +	{0x3613, 0xf7},
> +	{0x3616, 0x58},
> +	{0x3619, 0x99},
> +	{0x361b, 0x60},
> +	{0x361e, 0x79},
> +	{0x3634, 0x10},
> +	{0x3635, 0x10},
> +	{0x3636, 0x15},
> +	{0x3646, 0x86},
> +	{0x364a, 0x0b},
> +
> +	/* Sensor control */
> +	{0x3700, 0x17},
> +	{0x3701, 0x22},
> +	{0x3703, 0x10},
> +	{0x370a, 0x37},
> +	{0x3706, 0x63},
> +	{0x3709, 0x3c},
> +	{0x370c, 0x30},
> +	{0x3710, 0x24},
> +	{0x3720, 0x28},
> +	{0x3729, 0x7b},
> +	{0x372b, 0xbd},
> +	{0x372c, 0xbc},
> +	{0x372e, 0x52},
> +	{0x373c, 0x0e},
> +	{0x373e, 0x33},
> +	{0x3743, 0x10},
> +	{0x3744, 0x88},
> +	{0x3745, 0xc0},
> +	{0x374c, 0x00},
> +	{0x374e, 0x23},
> +	{0x3751, 0x7b},
> +	{0x3753, 0xbd},
> +	{0x3754, 0xbc},
> +	{0x3756, 0x52},
> +	{0x376b, 0x20},
> +	{0x3774, 0x51},
> +	{0x3776, 0xbd},
> +	{0x3777, 0xbd},
> +	{0x3781, 0x18},
> +	{0x3783, 0x25},
> +	{0x3798, 0x1b},
> +
> +	/* Timing control */
> +	{0x3801, 0x08}, /* H_CROP_START_L h_crop_start[7:0] = 0x08 */

It would be nice to define register macros for the known registers. This
can be done in a separate patch.

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +	{0x3805, 0x97}, /* H_CROP_END_L h_crop_end[7:0] = 0x97 */
> +	{0x380c, 0x0a}, /* TIMING_HTS_H hts[14:8] = 0x0a */
> +	{0x380d, 0x0e}, /* TIMING_HTS_L hts[7:0] = 0x0e */
> +	{0x3811, 0x08}, /* H_WIN_OFF_L h_win_off[7:0] = 0x08*/
> +	{0x3813, 0x04}, /* V_WIN_OFF_L v_win_off[7:0] = 0x04 */
> +	{0x3819, 0x01}, /* VSYNC_END_L vsync_end_point[7:0] = 0x01 */
> +	{0x3821, 0x06}, /* TIMING_FORMAT2 array_h_mirror = 1, digital_h_mirror = 1 */
> +
> +	/* OTP control */
> +	{0x3d85, 0x36}, /* OTP_REG85 OTP_power_up_load_setting_enable = 1,
> +			 * OTP_power_up_load_data_enable = 1,
> +			 * OTP_bist_select = 1 (compare with zero)
> +			 */
> +	{0x3d8c, 0x71}, /* OTP_SETTING_STT_ADDRESS_H */
> +	{0x3d8d, 0xcb}, /* OTP_SETTING_STT_ADDRESS_L */
> +
> +	/* BLC registers*/
> +	{0x4001, 0x40}, /* DEBUG_MODE */
> +	{0x401b, 0x00}, /* DEBUG_MODE */
> +	{0x401d, 0x00}, /* DEBUG_MODE */
> +	{0x401f, 0x00}, /* DEBUG_MODE */
> +	{0x4020, 0x00}, /* ANCHOR_LEFT_START_H anchor_left_start[11:8] = 0 */
> +	{0x4021, 0x10}, /* ANCHOR_LEFT_START_L anchor_left_start[7:0] = 0x10 */
> +	{0x4022, 0x07}, /* ANCHOR_LEFT_END_H anchor_left_end[11:8] = 0x07 */
> +	{0x4023, 0xcf}, /* ANCHOR_LEFT_END_L anchor_left_end[7:0] = 0xcf */
> +	{0x4024, 0x09}, /* ANCHOR_RIGHT_START_H anchor_right_start[11:8] = 0x09 */
> +	{0x4025, 0x60}, /* ANCHOR_RIGHT_START_L anchor_right_start[7:0] = 0x60 */
> +	{0x4026, 0x09}, /* ANCHOR_RIGHT_END_H anchor_right_end[11:8] = 0x09 */
> +	{0x4027, 0x6f}, /* ANCHOR_RIGHT_END_L anchor_right_end[7:0] = 0x6f */
> +
> +	/* ADC sync control */
> +	{0x4500, 0x6c}, /* ADC_SYNC_CTRL */
> +	{0x4503, 0x01}, /* ADC_SYNC_CTRL */
> +
> +	/* VFIFO */
> +	{0x4601, 0xa7}, /* VFIFO_CTRL_01 r_vfifo_read_start[7:0] = 0xa7 */
> +
> +	/* Temperature monitor */
> +	{0x4d00, 0x04}, /* TPM_CTRL_00 tmp_slope[15:8] = 0x04 */
> +	{0x4d01, 0x42}, /* TPM_CTRL_01 tmp_slope[7:0] = 0x42 */
> +	{0x4d02, 0xd1}, /* TPM_CTRL_02 tpm_offset[31:24] = 0xd1 */
> +	{0x4d03, 0x93}, /* TPM_CTRL_03 tpm_offset[23:16] = 0x93 */
> +	{0x4d04, 0xf5}, /* TPM_CTRL_04 tpm_offset[15:8]  = 0xf5 */
> +	{0x4d05, 0xc1}, /* TPM_CTRL_05 tpm_offset[7:0]   = 0xc1 */
> +
> +	/* pre-ISP control */
> +	{0x5050, 0x0c}, /* DEBUG_MODE */
> +
> +	/* OTP-DPC control */
> +	{0x5501, 0x10}, /* OTP_DPC_START_L otp_start_address[7:0] = 0x10 */
> +	{0x5503, 0x0f}, /* OTP_DPC_END_L otp_end_address[7:0] = 0x0f */
>  	{REG_NULL, 0x00},
>  };
>  

-- 
Regards,

Laurent Pinchart