Re: [PATCH V2 1/2] media: i2c: imx219: Split common registers from mode tables

From: Adam Ford
Date: Tue Jun 21 2022 - 11:59:29 EST

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In reply to: Dave Stevenson: "Re: [PATCH V2 1/2] media: i2c: imx219: Split common registers from mode tables"
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On Tue, Jun 21, 2022 at 10:46 AM Dave Stevenson
<dave.stevenson@xxxxxxxxxxxxxxx> wrote:
>
> Hi Adam
>
> Thanks for the patch, and sorry it's taken me a few days to get to it.
>
> On Thu, 16 Jun 2022 at 13:31, Adam Ford <aford173@xxxxxxxxx> wrote:
> >
> > There are four modes, and each mode has a table of registers.
> > Some of the registers are common to all modes, so create new
> > tables for these common registers to reduce duplicate code.
> >
> > Signed-off-by: Adam Ford <aford173@xxxxxxxxx>
> > ---
> > V2: Merge the PLL table into the common table instead of having
> > two separate, common tables.
> >
> > diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
> > index e10af3f74b38..a43eed143999 100644
> > --- a/drivers/media/i2c/imx219.c
> > +++ b/drivers/media/i2c/imx219.c
> > @@ -145,23 +145,60 @@ struct imx219_mode {
> > struct imx219_reg_list reg_list;
> > };
> >
> > -/*
> > - * Register sets lifted off the i2C interface from the Raspberry Pi firmware
> > - * driver.
> > - * 3280x2464 = mode 2, 1920x1080 = mode 1, 1640x1232 = mode 4, 640x480 = mode 7.
> > - */
> > -static const struct imx219_reg mode_3280x2464_regs[] = {
> > - {0x0100, 0x00},
> > +/* To Access Addresses 3000-5fff, send the following commands */
> > +static const struct imx219_reg imx219_common_regs[] = {
> > + {0x0100, 0x00}, /* Mode Select */
> > +
> > + /* Access Command Sequence */
> > {0x30eb, 0x0c},
> > {0x30eb, 0x05},
> > {0x300a, 0xff},
> > {0x300b, 0xff},
> > {0x30eb, 0x05},
> > {0x30eb, 0x09},
> > - {0x0114, 0x01},
> > - {0x0128, 0x00},
> > - {0x012a, 0x18},
> > +
> > + /* PLL Clock Table */
> > + {0x0301, 0x05}, /* VTPXCK_DIV */
> > + {0x0303, 0x01}, /* VTSYSCK_DIV */
> > + {0x0304, 0x03}, /* PREPLLCK_VT_DIV 0x03 = AUTO set */
> > + {0x0305, 0x03}, /* PREPLLCK_OP_DIV 0x03 = AUTO set */
> > + {0x0306, 0x00}, /* PLL_VT_MPY */
> > + {0x0307, 0x39},
> > + {0x030b, 0x01}, /* OP_SYS_CLK_DIV */
> > + {0x030c, 0x00}, /* PLL_OP_MPY */
> > + {0x030d, 0x72},
> > +
> > + /* Undocumented registers */
> > + {0x455e, 0x00},
> > + {0x471e, 0x4b},
> > + {0x4767, 0x0f},
> > + {0x4750, 0x14},
> > + {0x4540, 0x00},
> > + {0x47b4, 0x14},
> > + {0x4713, 0x30},
> > + {0x478b, 0x10},
> > + {0x478f, 0x10},
> > + {0x4793, 0x10},
> > + {0x4797, 0x0e},
> > + {0x479b, 0x0e},
> > +
> > + /* Frame Bank Register Group "A" */
> > + {0x0162, 0x0d}, /* Line_Length_A */
> > + {0x0163, 0x78},
>
> Registers 0x0170 and 0x171 for X_ODD_INC_A and Y_ODD_INC_A are also
> common to all modes as 0x01. You could have modes with skipping, but
> currently there are none.
>
> > +
> > + /* Output setup registers */
> > + {0x0114, 0x01}, /* CSI 2-Lane Mode */
> > + {0x0128, 0x00}, /* DPHY Auto Mode */
> > + {0x012a, 0x18}, /* EXCK_Freq */
> > {0x012b, 0x00},
> > +};
> > +
> > +/*
> > + * Register sets lifted off the i2C interface from the Raspberry Pi firmware
> > + * driver.
> > + * 3280x2464 = mode 2, 1920x1080 = mode 1, 1640x1232 = mode 4, 640x480 = mode 7.
> > + */
> > +static const struct imx219_reg mode_3280x2464_regs[] = {
> > {0x0164, 0x00},
> > {0x0165, 0x00},
> > {0x0166, 0x0c},
> > @@ -176,51 +213,15 @@ static const struct imx219_reg mode_3280x2464_regs[] = {
> > {0x016f, 0xa0},
> > {0x0170, 0x01},
> > {0x0171, 0x01},
> > - {0x0174, 0x00},
> > + {0x0174, 0x00}, /* No-Binning */
> > {0x0175, 0x00},
> > - {0x0301, 0x05},
> > - {0x0303, 0x01},
> > - {0x0304, 0x03},
> > - {0x0305, 0x03},
> > - {0x0306, 0x00},
> > - {0x0307, 0x39},
> > - {0x030b, 0x01},
> > - {0x030c, 0x00},
> > - {0x030d, 0x72},
> > {0x0624, 0x0c},
> > {0x0625, 0xd0},
> > {0x0626, 0x09},
> > {0x0627, 0xa0},
> > - {0x455e, 0x00},
> > - {0x471e, 0x4b},
> > - {0x4767, 0x0f},
> > - {0x4750, 0x14},
> > - {0x4540, 0x00},
> > - {0x47b4, 0x14},
> > - {0x4713, 0x30},
> > - {0x478b, 0x10},
> > - {0x478f, 0x10},
> > - {0x4793, 0x10},
> > - {0x4797, 0x0e},
> > - {0x479b, 0x0e},
> > - {0x0162, 0x0d},
> > - {0x0163, 0x78},
> > };
> >
> > static const struct imx219_reg mode_1920_1080_regs[] = {
> > - {0x0100, 0x00},
> > - {0x30eb, 0x05},
> > - {0x30eb, 0x0c},
> > - {0x300a, 0xff},
> > - {0x300b, 0xff},
> > - {0x30eb, 0x05},
> > - {0x30eb, 0x09},
> > - {0x0114, 0x01},
> > - {0x0128, 0x00},
> > - {0x012a, 0x18},
> > - {0x012b, 0x00},
> > - {0x0162, 0x0d},
> > - {0x0163, 0x78},
> > {0x0164, 0x02},
> > {0x0165, 0xa8},
> > {0x0166, 0x0a},
> > @@ -235,47 +236,15 @@ static const struct imx219_reg mode_1920_1080_regs[] = {
> > {0x016f, 0x38},
> > {0x0170, 0x01},
> > {0x0171, 0x01},
> > - {0x0174, 0x00},
> > + {0x0174, 0x00}, /* No-Binning */
> > {0x0175, 0x00},
> > - {0x0301, 0x05},
> > - {0x0303, 0x01},
> > - {0x0304, 0x03},
> > - {0x0305, 0x03},
> > - {0x0306, 0x00},
> > - {0x0307, 0x39},
> > - {0x030b, 0x01},
> > - {0x030c, 0x00},
> > - {0x030d, 0x72},
> > {0x0624, 0x07},
> > {0x0625, 0x80},
> > {0x0626, 0x04},
> > {0x0627, 0x38},
> > - {0x455e, 0x00},
> > - {0x471e, 0x4b},
> > - {0x4767, 0x0f},
> > - {0x4750, 0x14},
> > - {0x4540, 0x00},
> > - {0x47b4, 0x14},
> > - {0x4713, 0x30},
> > - {0x478b, 0x10},
> > - {0x478f, 0x10},
> > - {0x4793, 0x10},
> > - {0x4797, 0x0e},
> > - {0x479b, 0x0e},
> > };
> >
> > static const struct imx219_reg mode_1640_1232_regs[] = {
> > - {0x0100, 0x00},
> > - {0x30eb, 0x0c},
> > - {0x30eb, 0x05},
> > - {0x300a, 0xff},
> > - {0x300b, 0xff},
> > - {0x30eb, 0x05},
> > - {0x30eb, 0x09},
> > - {0x0114, 0x01},
> > - {0x0128, 0x00},
> > - {0x012a, 0x18},
> > - {0x012b, 0x00},
> > {0x0164, 0x00},
> > {0x0165, 0x00},
> > {0x0166, 0x0c},
> > @@ -290,51 +259,15 @@ static const struct imx219_reg mode_1640_1232_regs[] = {
> > {0x016f, 0xd0},
> > {0x0170, 0x01},
> > {0x0171, 0x01},
> > - {0x0174, 0x01},
> > + {0x0174, 0x01}, /* x2-Binning */
> > {0x0175, 0x01},
> > - {0x0301, 0x05},
> > - {0x0303, 0x01},
> > - {0x0304, 0x03},
> > - {0x0305, 0x03},
> > - {0x0306, 0x00},
> > - {0x0307, 0x39},
> > - {0x030b, 0x01},
> > - {0x030c, 0x00},
> > - {0x030d, 0x72},
> > {0x0624, 0x06},
> > {0x0625, 0x68},
> > {0x0626, 0x04},
> > {0x0627, 0xd0},
> > - {0x455e, 0x00},
> > - {0x471e, 0x4b},
> > - {0x4767, 0x0f},
> > - {0x4750, 0x14},
> > - {0x4540, 0x00},
> > - {0x47b4, 0x14},
> > - {0x4713, 0x30},
> > - {0x478b, 0x10},
> > - {0x478f, 0x10},
> > - {0x4793, 0x10},
> > - {0x4797, 0x0e},
> > - {0x479b, 0x0e},
> > - {0x0162, 0x0d},
> > - {0x0163, 0x78},
> > };
> >
> > static const struct imx219_reg mode_640_480_regs[] = {
> > - {0x0100, 0x00},
> > - {0x30eb, 0x05},
> > - {0x30eb, 0x0c},
> > - {0x300a, 0xff},
> > - {0x300b, 0xff},
> > - {0x30eb, 0x05},
> > - {0x30eb, 0x09},
> > - {0x0114, 0x01},
> > - {0x0128, 0x00},
> > - {0x012a, 0x18},
> > - {0x012b, 0x00},
> > - {0x0162, 0x0d},
> > - {0x0163, 0x78},
> > {0x0164, 0x03},
> > {0x0165, 0xe8},
> > {0x0166, 0x08},
> > @@ -349,33 +282,12 @@ static const struct imx219_reg mode_640_480_regs[] = {
> > {0x016f, 0xe0},
> > {0x0170, 0x01},
> > {0x0171, 0x01},
> > - {0x0174, 0x03},
> > + {0x0174, 0x03}, /* x2-analog binning */
> > {0x0175, 0x03},
> > - {0x0301, 0x05},
> > - {0x0303, 0x01},
> > - {0x0304, 0x03},
> > - {0x0305, 0x03},
> > - {0x0306, 0x00},
> > - {0x0307, 0x39},
> > - {0x030b, 0x01},
> > - {0x030c, 0x00},
> > - {0x030d, 0x72},
> > {0x0624, 0x06},
> > {0x0625, 0x68},
> > {0x0626, 0x04},
> > {0x0627, 0xd0},
> > - {0x455e, 0x00},
> > - {0x471e, 0x4b},
> > - {0x4767, 0x0f},
> > - {0x4750, 0x14},
> > - {0x4540, 0x00},
> > - {0x47b4, 0x14},
> > - {0x4713, 0x30},
> > - {0x478b, 0x10},
> > - {0x478f, 0x10},
> > - {0x4793, 0x10},
> > - {0x4797, 0x0e},
> > - {0x479b, 0x0e},
> > };
> >
> > static const struct imx219_reg raw8_framefmt_regs[] = {
> > @@ -1041,6 +953,13 @@ static int imx219_start_streaming(struct imx219 *imx219)
> > if (ret < 0)
> > return ret;
> >
> > + /* Send the Manufacturing Header common to all modes */
>
> It's a table of common settings, not a manufacturing header.
> s/Send the Manufacturing Header/Send all registers that are

I used that term because the data sheet shows the following sequence:

{0x30eb, 0x0c},
{0x30eb, 0x05},
{0x300a, 0xff},
{0x300b, 0xff},
{0x30eb, 0x05},
{0x30eb, 0x09},

It's listed as "Manufacturer Specific Registers" to access
0x3000-5fff, the specific sequence as specified in 3-4. The entire
table is common, but I tried to put comments into the sections to
explain what they do.

>
> Dave
>
> > + ret = imx219_write_regs(imx219, imx219_common_regs, ARRAY_SIZE(imx219_common_regs));
> > + if (ret) {
> > + dev_err(&client->dev, "%s failed to send mfg header\n", __func__);
> > + goto err_rpm_put;
> > + }
> > +
> > /* Apply default values of current mode */
> > reg_list = &imx219->mode->reg_list;
> > ret = imx219_write_regs(imx219, reg_list->regs, reg_list->num_of_regs);
> > --
> > 2.34.1
> >

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In reply to: Dave Stevenson: "Re: [PATCH V2 1/2] media: i2c: imx219: Split common registers from mode tables"
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