Hi Dongchun,
On Thu, Oct 31, 2019 at 05:02:13PM +0800, Dongchun Zhu wrote:
> This adds two more sensor modes for Omnivision ov8856 image sensor,
> including the resolution of 1632*1224 and 3264*2448, both with the
> Bayer Order of BGGR.
>
> Signed-off-by: Dongchun Zhu <dongchun.zhu@xxxxxxxxxxxx>
> ---
> drivers/media/i2c/ov8856.c | 661 ++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 652 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c
> index 8655842..4815c26 100644
> --- a/drivers/media/i2c/ov8856.c
> +++ b/drivers/media/i2c/ov8856.c
> @@ -3,10 +3,13 @@
>
> #include <asm/unaligned.h>
> #include <linux/acpi.h>
> +#include <linux/clk.h>
> #include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> #include <linux/i2c.h>
> #include <linux/module.h>
> #include <linux/pm_runtime.h>
> +#include <linux/regulator/consumer.h>
> #include <media/v4l2-ctrls.h>
> #include <media/v4l2-device.h>
> #include <media/v4l2-fwnode.h>
> @@ -18,10 +21,15 @@
> #define OV8856_LINK_FREQ_360MHZ 360000000ULL
> #define OV8856_LINK_FREQ_180MHZ 180000000ULL
> #define OV8856_SCLK 144000000ULL
> -#define OV8856_MCLK 19200000
> +#define OV8856_XVCLK_19_2 19200000
> +#define OV8856_XVCLK_24 24000000
> #define OV8856_DATA_LANES 4
> #define OV8856_RGB_DEPTH 10
>
> +#define REG_X_ADDR_START 0x3808
> +#define X_OUTPUT_FULL_SIZE 0x0cc0
> +#define X_OUTPUT_BINNING_SIZE 0x0660
> +
> #define OV8856_REG_CHIP_ID 0x300a
> #define OV8856_CHIP_ID 0x00885a
>
> @@ -29,6 +37,22 @@
> #define OV8856_MODE_STANDBY 0x00
> #define OV8856_MODE_STREAMING 0x01
>
> +/* define 1B module revision */
> +#define OV8856_1B_MODULE 0x02
> +
> +/* the OTP read-out buffer is at 0x7000 and 0xf is the offset
> + * of the byte in the OTP that means the module revision
> + */
> +#define OV8856_MODULE_REVISION 0x700f
> +#define OV8856_OTP_MODE_CTRL 0x3d84
> +#define OV8856_OTP_LOAD_CTRL 0x3d81
> +#define OV8856_OTP_MODE_AUTO 0x00
> +#define OV8856_OTP_LOAD_CTRL_ENABLE BIT(0)
> +
> +/* Analog control register that decided by module revision */
> +#define OV8856_ANAL_MODE_CTRL 0x3614
> +#define OV8856_ANAL_1B_VAL 0x20
> +
> /* vertical-timings from sensor */
> #define OV8856_REG_VTS 0x380e
> #define OV8856_VTS_MAX 0x7fff
> @@ -64,6 +88,14 @@
>
> #define to_ov8856(_sd) container_of(_sd, struct ov8856, sd)
>
> +static const char * const ov8856_supply_names[] = {
> + "dovdd", /* Digital I/O power */
> + "avdd", /* Analog power */
> + "dvdd", /* Digital core power */
> +};
> +
> +#define OV8856_NUM_SUPPLIES ARRAY_SIZE(ov8856_supply_names)
> +
> enum {
> OV8856_LINK_FREQ_720MBPS,
> OV8856_LINK_FREQ_360MBPS,
> @@ -316,6 +348,209 @@ static const struct ov8856_reg mode_3280x2464_regs[] = {
> {0x5e00, 0x00}
> };
>
> +static const struct ov8856_reg mode_3264x2448_regs[] = {
The new modes are presumably for either 19,2 or 24 MHz frequency (but which
one?) whereas the old modes were for 19,2 MHz.
This needs to be addressed, preferrably in a separate patch. The modes
should be added in another patch.
> + {0x0103, 0x01},
> + {0x0302, 0x3c},
> + {0x0303, 0x01},
> + {0x031e, 0x0c},
> + {0x3000, 0x20},
> + {0x3003, 0x08},
> + {0x300e, 0x20},
> + {0x3010, 0x00},
> + {0x3015, 0x84},
> + {0x3018, 0x72},
> + {0x3021, 0x23},
> + {0x3033, 0x24},
> + {0x3500, 0x00},
> + {0x3501, 0x9a},
> + {0x3502, 0x20},
> + {0x3503, 0x08},
> + {0x3505, 0x83},
> + {0x3508, 0x01},
> + {0x3509, 0x80},
> + {0x350c, 0x00},
> + {0x350d, 0x80},
> + {0x350e, 0x04},
> + {0x350f, 0x00},
> + {0x3510, 0x00},
> + {0x3511, 0x02},
> + {0x3512, 0x00},
> + {0x3600, 0x72},
> + {0x3601, 0x40},
> + {0x3602, 0x30},
> + {0x3610, 0xc5},
> + {0x3611, 0x58},
> + {0x3612, 0x5c},
> + {0x3613, 0xca},
> + {0x3614, 0x60},
> + {0x3628, 0xff},
> + {0x3629, 0xff},
> + {0x362a, 0xff},
> + {0x3633, 0x10},
> + {0x3634, 0x10},
> + {0x3635, 0x10},
> + {0x3636, 0x10},
> + {0x3663, 0x08},
> + {0x3669, 0x34},
> + {0x366d, 0x00},
> + {0x366e, 0x10},
> + {0x3706, 0x86},
> + {0x370b, 0x7e},
> + {0x3714, 0x23},
> + {0x3730, 0x12},
> + {0x3733, 0x10},
> + {0x3764, 0x00},
> + {0x3765, 0x00},
> + {0x3769, 0x62},
> + {0x376a, 0x2a},
> + {0x376b, 0x30},
> + {0x3780, 0x00},
> + {0x3781, 0x24},
> + {0x3782, 0x00},
> + {0x3783, 0x23},
> + {0x3798, 0x2f},
> + {0x37a1, 0x60},
> + {0x37a8, 0x6a},
> + {0x37ab, 0x3f},
> + {0x37c2, 0x04},
> + {0x37c3, 0xf1},
> + {0x37c9, 0x80},
> + {0x37cb, 0x16},
> + {0x37cc, 0x16},
> + {0x37cd, 0x16},
> + {0x37ce, 0x16},
> + {0x3800, 0x00},
> + {0x3801, 0x00},
> + {0x3802, 0x00},
> + {0x3803, 0x0c},
> + {0x3804, 0x0c},
> + {0x3805, 0xdf},
> + {0x3806, 0x09},
> + {0x3807, 0xa3},
> + {0x3808, 0x0c},
> + {0x3809, 0xc0},
> + {0x380a, 0x09},
> + {0x380b, 0x90},
> + {0x380c, 0x07},
> + {0x380d, 0x8c},
> + {0x380e, 0x09},
> + {0x380f, 0xb2},
> + {0x3810, 0x00},
> + {0x3811, 0x04},
> + {0x3812, 0x00},
> + {0x3813, 0x02},
> + {0x3814, 0x01},
> + {0x3815, 0x01},
> + {0x3816, 0x00},
> + {0x3817, 0x00},
> + {0x3818, 0x00},
> + {0x3819, 0x10},
> + {0x3820, 0x80},
> + {0x3821, 0x46},
> + {0x382a, 0x01},
> + {0x382b, 0x01},
> + {0x3830, 0x06},
> + {0x3836, 0x02},
> + {0x3862, 0x04},
> + {0x3863, 0x08},
> + {0x3cc0, 0x33},
> + {0x3d85, 0x17},
> + {0x3d8c, 0x73},
> + {0x3d8d, 0xde},
> + {0x4001, 0xe0},
> + {0x4003, 0x40},
> + {0x4008, 0x00},
> + {0x4009, 0x0b},
> + {0x400a, 0x00},
> + {0x400b, 0x84},
> + {0x400f, 0x80},
> + {0x4010, 0xf0},
> + {0x4011, 0xff},
> + {0x4012, 0x02},
> + {0x4013, 0x01},
> + {0x4014, 0x01},
> + {0x4015, 0x01},
> + {0x4042, 0x00},
> + {0x4043, 0x80},
> + {0x4044, 0x00},
> + {0x4045, 0x80},
> + {0x4046, 0x00},
> + {0x4047, 0x80},
> + {0x4048, 0x00},
> + {0x4049, 0x80},
> + {0x4041, 0x03},
> + {0x404c, 0x20},
> + {0x404d, 0x00},
> + {0x404e, 0x20},
> + {0x4203, 0x80},
> + {0x4307, 0x30},
> + {0x4317, 0x00},
> + {0x4502, 0x50},
> + {0x4503, 0x08},
> + {0x4601, 0x80},
> + {0x4800, 0x44},
> + {0x4816, 0x53},
> + {0x481b, 0x50},
> + {0x481f, 0x27},
> + {0x4823, 0x3c},
> + {0x482b, 0x00},
> + {0x4831, 0x66},
> + {0x4837, 0x16},
> + {0x483c, 0x0f},
> + {0x484b, 0x05},
> + {0x5000, 0x77},
> + {0x5001, 0x0a},
> + {0x5003, 0xc8},
> + {0x5004, 0x04},
> + {0x5006, 0x00},
> + {0x5007, 0x00},
> + {0x502e, 0x03},
> + {0x5030, 0x41},
> + {0x5780, 0x14},
> + {0x5781, 0x0f},
> + {0x5782, 0x44},
> + {0x5783, 0x02},
> + {0x5784, 0x01},
> + {0x5785, 0x01},
> + {0x5786, 0x00},
> + {0x5787, 0x04},
> + {0x5788, 0x02},
> + {0x5789, 0x0f},
> + {0x578a, 0xfd},
> + {0x578b, 0xf5},
> + {0x578c, 0xf5},
> + {0x578d, 0x03},
> + {0x578e, 0x08},
> + {0x578f, 0x0c},
> + {0x5790, 0x08},
> + {0x5791, 0x04},
> + {0x5792, 0x00},
> + {0x5793, 0x52},
> + {0x5794, 0xa3},
> + {0x5795, 0x02},
> + {0x5796, 0x20},
> + {0x5797, 0x20},
> + {0x5798, 0xd5},
> + {0x5799, 0xd5},
> + {0x579a, 0x00},
> + {0x579b, 0x50},
> + {0x579c, 0x00},
> + {0x579d, 0x2c},
> + {0x579e, 0x0c},
> + {0x579f, 0x40},
> + {0x57a0, 0x09},
> + {0x57a1, 0x40},
> + {0x59f8, 0x3d},
> + {0x5a08, 0x02},
> + {0x5b00, 0x02},
> + {0x5b01, 0x10},
> + {0x5b02, 0x03},
> + {0x5b03, 0xcf},
> + {0x5b05, 0x6c},
> + {0x5e00, 0x00},
> + {0x5e10, 0xfc}
> +};
> +
> static const struct ov8856_reg mode_1640x1232_regs[] = {
> {0x3000, 0x20},
> {0x3003, 0x08},
> @@ -506,6 +741,209 @@ static const struct ov8856_reg mode_1640x1232_regs[] = {
> {0x5e00, 0x00}
> };
>
> +static const struct ov8856_reg mode_1632x1224_regs[] = {
> + {0x0103, 0x01},
> + {0x0302, 0x3c},
> + {0x0303, 0x01},
> + {0x031e, 0x0c},
> + {0x3000, 0x20},
> + {0x3003, 0x08},
> + {0x300e, 0x20},
> + {0x3010, 0x00},
> + {0x3015, 0x84},
> + {0x3018, 0x72},
> + {0x3021, 0x23},
> + {0x3033, 0x24},
> + {0x3500, 0x00},
> + {0x3501, 0x4c},
> + {0x3502, 0xe0},
> + {0x3503, 0x08},
> + {0x3505, 0x83},
> + {0x3508, 0x01},
> + {0x3509, 0x80},
> + {0x350c, 0x00},
> + {0x350d, 0x80},
> + {0x350e, 0x04},
> + {0x350f, 0x00},
> + {0x3510, 0x00},
> + {0x3511, 0x02},
> + {0x3512, 0x00},
> + {0x3600, 0x72},
> + {0x3601, 0x40},
> + {0x3602, 0x30},
> + {0x3610, 0xc5},
> + {0x3611, 0x58},
> + {0x3612, 0x5c},
> + {0x3613, 0xca},
> + {0x3614, 0x60},
> + {0x3628, 0xff},
> + {0x3629, 0xff},
> + {0x362a, 0xff},
> + {0x3633, 0x10},
> + {0x3634, 0x10},
> + {0x3635, 0x10},
> + {0x3636, 0x10},
> + {0x3663, 0x08},
> + {0x3669, 0x34},
> + {0x366d, 0x00},
> + {0x366e, 0x08},
> + {0x3706, 0x86},
> + {0x370b, 0x7e},
> + {0x3714, 0x27},
> + {0x3730, 0x12},
> + {0x3733, 0x10},
> + {0x3764, 0x00},
> + {0x3765, 0x00},
> + {0x3769, 0x62},
> + {0x376a, 0x2a},
> + {0x376b, 0x30},
> + {0x3780, 0x00},
> + {0x3781, 0x24},
> + {0x3782, 0x00},
> + {0x3783, 0x23},
> + {0x3798, 0x2f},
> + {0x37a1, 0x60},
> + {0x37a8, 0x6a},
> + {0x37ab, 0x3f},
> + {0x37c2, 0x14},
> + {0x37c3, 0xf1},
> + {0x37c9, 0x80},
> + {0x37cb, 0x16},
> + {0x37cc, 0x16},
> + {0x37cd, 0x16},
> + {0x37ce, 0x16},
> + {0x3800, 0x00},
> + {0x3801, 0x00},
> + {0x3802, 0x00},
> + {0x3803, 0x0c},
> + {0x3804, 0x0c},
> + {0x3805, 0xdf},
> + {0x3806, 0x09},
> + {0x3807, 0xa3},
> + {0x3808, 0x06},
> + {0x3809, 0x60},
> + {0x380a, 0x04},
> + {0x380b, 0xc8},
> + {0x380c, 0x07},
> + {0x380d, 0x8c},
> + {0x380e, 0x09},
> + {0x380f, 0xb2},
> + {0x3810, 0x00},
> + {0x3811, 0x02},
> + {0x3812, 0x00},
> + {0x3813, 0x02},
> + {0x3814, 0x03},
> + {0x3815, 0x01},
> + {0x3816, 0x00},
> + {0x3817, 0x00},
> + {0x3818, 0x00},
> + {0x3819, 0x10},
> + {0x3820, 0x80},
> + {0x3821, 0x47},
> + {0x382a, 0x03},
> + {0x382b, 0x01},
> + {0x3830, 0x06},
> + {0x3836, 0x02},
> + {0x3862, 0x04},
> + {0x3863, 0x08},
> + {0x3cc0, 0x33},
> + {0x3d85, 0x17},
> + {0x3d8c, 0x73},
> + {0x3d8d, 0xde},
> + {0x4001, 0xe0},
> + {0x4003, 0x40},
> + {0x4008, 0x00},
> + {0x4009, 0x05},
> + {0x400a, 0x00},
> + {0x400b, 0x84},
> + {0x400f, 0x80},
> + {0x4010, 0xf0},
> + {0x4011, 0xff},
> + {0x4012, 0x02},
> + {0x4013, 0x01},
> + {0x4014, 0x01},
> + {0x4015, 0x01},
> + {0x4042, 0x00},
> + {0x4043, 0x80},
> + {0x4044, 0x00},
> + {0x4045, 0x80},
> + {0x4046, 0x00},
> + {0x4047, 0x80},
> + {0x4048, 0x00},
> + {0x4049, 0x80},
> + {0x4041, 0x03},
> + {0x404c, 0x20},
> + {0x404d, 0x00},
> + {0x404e, 0x20},
> + {0x4203, 0x80},
> + {0x4307, 0x30},
> + {0x4317, 0x00},
> + {0x4502, 0x50},
> + {0x4503, 0x08},
> + {0x4601, 0x80},
> + {0x4800, 0x44},
> + {0x4816, 0x53},
> + {0x481b, 0x50},
> + {0x481f, 0x27},
> + {0x4823, 0x3c},
> + {0x482b, 0x00},
> + {0x4831, 0x66},
> + {0x4837, 0x16},
> + {0x483c, 0x0f},
> + {0x484b, 0x05},
> + {0x5000, 0x77},
> + {0x5001, 0x0a},
> + {0x5003, 0xc8},
> + {0x5004, 0x04},
> + {0x5006, 0x00},
> + {0x5007, 0x00},
> + {0x502e, 0x03},
> + {0x5030, 0x41},
> + {0x5795, 0x00},
> + {0x5796, 0x10},
> + {0x5797, 0x10},
> + {0x5798, 0x73},
> + {0x5799, 0x73},
> + {0x579a, 0x00},
> + {0x579b, 0x28},
> + {0x579c, 0x00},
> + {0x579d, 0x16},
> + {0x579e, 0x06},
> + {0x579f, 0x20},
> + {0x57a0, 0x04},
> + {0x57a1, 0xa0},
> + {0x5780, 0x14},
> + {0x5781, 0x0f},
> + {0x5782, 0x44},
> + {0x5783, 0x02},
> + {0x5784, 0x01},
> + {0x5785, 0x01},
> + {0x5786, 0x00},
> + {0x5787, 0x04},
> + {0x5788, 0x02},
> + {0x5789, 0x0f},
> + {0x578a, 0xfd},
> + {0x578b, 0xf5},
> + {0x578c, 0xf5},
> + {0x578d, 0x03},
> + {0x578e, 0x08},
> + {0x578f, 0x0c},
> + {0x5790, 0x08},
> + {0x5791, 0x04},
> + {0x5792, 0x00},
> + {0x5793, 0x52},
> + {0x5794, 0xa3},
> + {0x59f8, 0x3d},
> + {0x5a08, 0x02},
> + {0x5b00, 0x02},
> + {0x5b01, 0x10},
> + {0x5b02, 0x03},
> + {0x5b03, 0xcf},
> + {0x5b05, 0x6c},
> + {0x5e00, 0x00},
> + {0x5e10, 0xfc}
> +};
> +
> static const char * const ov8856_test_pattern_menu[] = {
> "Disabled",
> "Standard Color Bar",
> @@ -548,6 +986,18 @@ static const struct ov8856_mode supported_modes[] = {
> .link_freq_index = OV8856_LINK_FREQ_720MBPS,
> },
> {
> + .width = 3264,
> + .height = 2448,
> + .hts = 1932,
> + .vts_def = 2482,
> + .vts_min = 2482,
> + .reg_list = {
> + .num_of_regs = ARRAY_SIZE(mode_3264x2448_regs),
> + .regs = mode_3264x2448_regs,
> + },
> + .link_freq_index = OV8856_LINK_FREQ_720MBPS,
> + },
> + {
> .width = 1640,
> .height = 1232,
> .hts = 3820,
> @@ -558,6 +1008,18 @@ static const struct ov8856_mode supported_modes[] = {
> .regs = mode_1640x1232_regs,
> },
> .link_freq_index = OV8856_LINK_FREQ_360MBPS,
> + },
> + {
> + .width = 1632,
> + .height = 1224,
> + .hts = 1932,
> + .vts_def = 2482,
> + .vts_min = 2482,
> + .reg_list = {
> + .num_of_regs = ARRAY_SIZE(mode_1632x1224_regs),
> + .regs = mode_1632x1224_regs,
> + },
> + .link_freq_index = OV8856_LINK_FREQ_360MBPS,
> }
> };
>
> @@ -566,16 +1028,28 @@ struct ov8856 {
> struct media_pad pad;
> struct v4l2_ctrl_handler ctrl_handler;
>
> + struct clk *xvclk;
> + struct gpio_desc *n_shutdn_gpio;
> + struct regulator_bulk_data supplies[OV8856_NUM_SUPPLIES];
> +
> /* V4L2 Controls */
> struct v4l2_ctrl *link_freq;
> struct v4l2_ctrl *pixel_rate;
> struct v4l2_ctrl *vblank;
> struct v4l2_ctrl *hblank;
> struct v4l2_ctrl *exposure;
> + struct v4l2_mbus_framefmt fmt;
>
> /* Current mode */
> const struct ov8856_mode *cur_mode;
>
> + /* module hardware version that can be read out from register 0x700f
> + * the register value corresponds to different hardware version
> + * 01: 2A module revision
> + * 02: 1B module revision
> + */
> + bool is_1B_revision;
> +
> /* To serialize asynchronus callbacks */
> struct mutex mutex;
>
> @@ -696,6 +1170,25 @@ static int ov8856_test_pattern(struct ov8856 *ov8856, u32 pattern)
> OV8856_REG_VALUE_08BIT, pattern);
> }
>
> +static int ov8856_check_revision(struct ov8856 *ov8856)
> +{
> + int ret;
> +
> + ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
> + OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING);
> + if (ret)
> + return ret;
> +
> + ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL,
> + OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO);
> + if (ret)
> + return ret;
> +
> + return ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL,
> + OV8856_REG_VALUE_08BIT,
> + OV8856_OTP_LOAD_CTRL_ENABLE);
> +}
> +
> static int ov8856_set_ctrl(struct v4l2_ctrl *ctrl)
> {
> struct ov8856 *ov8856 = container_of(ctrl->handler,
> @@ -825,7 +1318,6 @@ static void ov8856_update_pad_format(const struct ov8856_mode *mode,
> {
> fmt->width = mode->width;
> fmt->height = mode->height;
> - fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
> fmt->field = V4L2_FIELD_NONE;
> }
>
> @@ -834,6 +1326,7 @@ static int ov8856_start_streaming(struct ov8856 *ov8856)
> struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
> const struct ov8856_reg_list *reg_list;
> int link_freq_index, ret;
> + u32 cur_h_size;
>
> link_freq_index = ov8856->cur_mode->link_freq_index;
> reg_list = &link_freq_configs[link_freq_index].reg_list;
> @@ -850,6 +1343,28 @@ static int ov8856_start_streaming(struct ov8856 *ov8856)
> return ret;
> }
>
> + /* Update R3614 if the revision is 1B module */
> + if (ov8856->is_1B_revision) {
> + ret = ov8856_write_reg(ov8856, OV8856_ANAL_MODE_CTRL,
> + OV8856_REG_VALUE_08BIT,
> + OV8856_ANAL_1B_VAL);
> + if (ret) {
> + dev_err(&client->dev, "failed to set R3614");
> + return ret;
> + }
> + }
> +
> + ret = ov8856_read_reg(ov8856, REG_X_ADDR_START,
> + OV8856_REG_VALUE_16BIT, &cur_h_size);
> + if (ret) {
> + dev_err(&client->dev, "failed to read out R3614");
> + return ret;
> + }
> +
> + if (cur_h_size == X_OUTPUT_FULL_SIZE ||
> + cur_h_size == X_OUTPUT_BINNING_SIZE)
> + ov8856->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10;
> +
> ret = __v4l2_ctrl_handler_setup(ov8856->sd.ctrl_handler);
> if (ret)
> return ret;
> @@ -908,6 +1423,44 @@ static int ov8856_set_stream(struct v4l2_subdev *sd, int enable)
> return ret;
> }
>
> +static int __ov8856_power_on(struct ov8856 *ov8856)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
> + int ret;
> +
> + ret = clk_prepare_enable(ov8856->xvclk);
> + if (ret < 0) {
> + dev_err(&client->dev, "failed to enable xvclk\n");
> + return ret;
> + }
> +
> + gpiod_set_value_cansleep(ov8856->n_shutdn_gpio, GPIOD_OUT_LOW);
> +
> + ret = regulator_bulk_enable(OV8856_NUM_SUPPLIES, ov8856->supplies);
> + if (ret < 0) {
> + dev_err(&client->dev, "failed to enable regulators\n");
> + goto disable_clk;
> + }
> +
> + gpiod_set_value_cansleep(ov8856->n_shutdn_gpio, GPIOD_OUT_HIGH);
> +
> + usleep_range(1500, 1800);
You only need this if ov8856->n_shutdn_gpio is non-NULL.
> +
> + return 0;
> +
> +disable_clk:
> + clk_disable_unprepare(ov8856->xvclk);
> +
> + return ret;
> +}
> +
> +static void __ov8856_power_off(struct ov8856 *ov8856)
> +{
> + gpiod_set_value_cansleep(ov8856->n_shutdn_gpio, GPIOD_OUT_LOW);
> + regulator_bulk_disable(OV8856_NUM_SUPPLIES, ov8856->supplies);
> + clk_disable_unprepare(ov8856->xvclk);
> +}
> +
> static int __maybe_unused ov8856_suspend(struct device *dev)
> {
> struct i2c_client *client = to_i2c_client(dev);
> @@ -951,6 +1504,7 @@ static int ov8856_set_format(struct v4l2_subdev *sd,
> struct v4l2_subdev_format *fmt)
> {
> struct ov8856 *ov8856 = to_ov8856(sd);
> + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
> const struct ov8856_mode *mode;
> s32 vblank_def, h_blank;
>
> @@ -960,7 +1514,9 @@ static int ov8856_set_format(struct v4l2_subdev *sd,
> fmt->format.height);
>
> mutex_lock(&ov8856->mutex);
> - ov8856_update_pad_format(mode, &fmt->format);
> + mbus_fmt->code = ov8856->fmt.code;
Also do add a separate patch for supporting other mbus codes if you need
them.
> + ov8856_update_pad_format(mode, mbus_fmt);
> + ov8856->fmt = fmt->format;
> if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
> } else {
> @@ -992,13 +1548,17 @@ static int ov8856_get_format(struct v4l2_subdev *sd,
> struct v4l2_subdev_format *fmt)
> {
> struct ov8856 *ov8856 = to_ov8856(sd);
> + struct v4l2_mbus_framefmt *mbus_fmt = &fmt->format;
>
> mutex_lock(&ov8856->mutex);
> - if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
> + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
> fmt->format = *v4l2_subdev_get_try_format(&ov8856->sd, cfg,
> fmt->pad);
> - else
> - ov8856_update_pad_format(ov8856->cur_mode, &fmt->format);
> + } else {
> + fmt->format = ov8856->fmt;
> + ov8856_update_pad_format(ov8856->cur_mode, mbus_fmt);
> + mbus_fmt->code = ov8856->fmt.code;
> + }
>
> mutex_unlock(&ov8856->mutex);
>
> @@ -1009,11 +1569,12 @@ static int ov8856_enum_mbus_code(struct v4l2_subdev *sd,
> struct v4l2_subdev_pad_config *cfg,
> struct v4l2_subdev_mbus_code_enum *code)
> {
> - /* Only one bayer order GRBG is supported */
> + struct ov8856 *ov8856 = to_ov8856(sd);
> +
> if (code->index > 0)
> return -EINVAL;
>
> - code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
> + code->code = ov8856->fmt.code;
>
> return 0;
> }
> @@ -1089,6 +1650,20 @@ static int ov8856_identify_module(struct ov8856 *ov8856)
> return -ENXIO;
> }
>
> + /* check sensor hardware revision */
> + ret = ov8856_check_revision(ov8856);
The function is rather enabling reading OTP memory. Also disable streaming
when you're done. This would be ideally a separate patch.
> + if (ret) {
> + dev_err(&client->dev, "failed to check sensor revision");
> + return ret;
> + }
> +
> + ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION,
> + OV8856_REG_VALUE_08BIT, &val);
> + if (ret)
> + return ret;
> +
> + ov8856->is_1B_revision = val == OV8856_1B_MODULE;
> +
> return 0;
> }
>
> @@ -1110,7 +1685,7 @@ static int ov8856_check_hwcfg(struct device *dev)
> if (ret)
> return ret;
>
> - if (mclk != OV8856_MCLK) {
> + if (mclk != OV8856_XVCLK_19_2) {
The mclk is the external clock frequency. Both 19,2 and 24 MHz need to work
if you claim to support 24 MHz.
> dev_err(dev, "external clock %d is not supported", mclk);
> return -EINVAL;
> }
> @@ -1167,6 +1742,9 @@ static int ov8856_remove(struct i2c_client *client)
> media_entity_cleanup(&sd->entity);
> v4l2_ctrl_handler_free(sd->ctrl_handler);
> pm_runtime_disable(&client->dev);
> + if (!pm_runtime_status_suspended(&client->dev))
> + __ov8856_power_off(ov8856);
> + pm_runtime_set_suspended(&client->dev);
> mutex_destroy(&ov8856->mutex);
>
> return 0;
> @@ -1175,6 +1753,7 @@ static int ov8856_remove(struct i2c_client *client)
> static int ov8856_probe(struct i2c_client *client)
> {
> struct ov8856 *ov8856;
> + unsigned int i;
> int ret;
>
> ret = ov8856_check_hwcfg(&client->dev);
> @@ -1189,6 +1768,42 @@ static int ov8856_probe(struct i2c_client *client)
> return -ENOMEM;
>
> v4l2_i2c_subdev_init(&ov8856->sd, client, &ov8856_subdev_ops);
> + ov8856->fmt.code = MEDIA_BUS_FMT_SGRBG10_1X10;
> +
> + ov8856->xvclk = devm_clk_get(&client->dev, "xvclk");
> + if (IS_ERR(ov8856->xvclk)) {
> + dev_err(&client->dev, "failed to get xvclk\n");
> + return -EINVAL;
> + }
> +
> + ret = clk_set_rate(ov8856->xvclk, OV8856_XVCLK_24);
Use the specified clock frequency, not 24 MHz.
> + if (ret < 0) {
> + dev_err(&client->dev, "failed to set xvclk rate (24MHz)\n");
> + return ret;
> + }
> + if (clk_get_rate(ov8856->xvclk) != OV8856_XVCLK_24)
> + dev_warn(&client->dev,
> + "xvclk mismatched, modes are based on 24MHz\n");
> +
> + ov8856->n_shutdn_gpio = devm_gpiod_get(&client->dev, "reset",
> + GPIOD_OUT_LOW);
> + if (IS_ERR(ov8856->n_shutdn_gpio)) {
> + dev_err(&client->dev, "failed to get reset-gpios\n");
> + return -EINVAL;
> + }
> +
> + for (i = 0; i < OV8856_NUM_SUPPLIES; i++)
> + ov8856->supplies[i].supply = ov8856_supply_names[i];
> +
> + ret = devm_regulator_bulk_get(&client->dev, OV8856_NUM_SUPPLIES,
> + ov8856->supplies);
> + if (ret)
> + dev_warn(&client->dev, "failed to get regulators\n");
> +
> + ret = __ov8856_power_on(ov8856);
> + if (ret)
> + dev_warn(&client->dev, "failed to power on\n");
> +
> ret = ov8856_identify_module(ov8856);
> if (ret) {
> dev_err(&client->dev, "failed to find sensor: %d", ret);
> @@ -1241,8 +1856,29 @@ static int ov8856_probe(struct i2c_client *client)
> return ret;
> }
>
> +static int __maybe_unused ov8856_runtime_resume(struct device *dev)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct ov8856 *ov8856 = to_ov8856(sd);
> +
> + return __ov8856_power_on(ov8856);
> +}
> +
> +static int __maybe_unused ov8856_runtime_suspend(struct device *dev)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct v4l2_subdev *sd = i2c_get_clientdata(client);
> + struct ov8856 *ov8856 = to_ov8856(sd);
> +
> + __ov8856_power_off(ov8856);
Please merge this function with the caller. The same for
ov8856_runtime_resume().
> +
> + return 0;
> +}
> +
> static const struct dev_pm_ops ov8856_pm_ops = {
> SET_SYSTEM_SLEEP_PM_OPS(ov8856_suspend, ov8856_resume)
> + SET_RUNTIME_PM_OPS(ov8856_runtime_suspend, ov8856_runtime_resume, NULL)
> };
>
> #ifdef CONFIG_ACPI
> @@ -1254,11 +1890,18 @@ static const struct acpi_device_id ov8856_acpi_ids[] = {
> MODULE_DEVICE_TABLE(acpi, ov8856_acpi_ids);
> #endif
>
> +static const struct of_device_id ov8856_of_match[] = {
> + { .compatible = "ovti,ov8856" },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, ov8856_of_match);
> +
> static struct i2c_driver ov8856_i2c_driver = {
> .driver = {
> .name = "ov8856",
> .pm = &ov8856_pm_ops,
> .acpi_match_table = ACPI_PTR(ov8856_acpi_ids),
> + .of_match_table = ov8856_of_match,
> },
> .probe_new = ov8856_probe,
> .remove = ov8856_remove,
--
Regards,
Sakari Ailus
