From: Sakari Ailus <sakari.ailus@iki.fi>
To: Dave Stevenson <dave.stevenson@raspberrypi.com>
Cc: paul.j.murphy@intel.com, daniele.alessandrelli@intel.com,
linux-media@vger.kernel.org
Subject: Re: [PATCH 08/16] media: i2c: ov9282: Add selection for CSI2 clock mode
Date: Wed, 26 Oct 2022 10:21:50 +0300 [thread overview]
Message-ID: <Y1jgDsmgXZYx0rZf@valkosipuli.retiisi.eu> (raw)
In-Reply-To: <20221005152809.3785786-9-dave.stevenson@raspberrypi.com>
Hi Dave,
On Wed, Oct 05, 2022 at 04:28:01PM +0100, Dave Stevenson wrote:
> The sensor supports either having the CSI2 clock lane free
> running, or gated when there is no packet to transmit.
> The driver only selected gated (non-continuous) clock mode.
>
> Add code to allow fwnode to configure whether the clock is
> gated or free running.
>
> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
> ---
> drivers/media/i2c/ov9282.c | 16 +++++++++++++++-
> 1 file changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/ov9282.c b/drivers/media/i2c/ov9282.c
> index abb1223c0260..334b31af34a4 100644
> --- a/drivers/media/i2c/ov9282.c
> +++ b/drivers/media/i2c/ov9282.c
> @@ -46,6 +46,9 @@
> /* Group hold register */
> #define OV9282_REG_HOLD 0x3308
>
> +#define OV9282_REG_MIPI_CTRL00 0x4800
> +#define OV9282_GATED_CLOCK BIT(5)
> +
> /* Input clock rate */
> #define OV9282_INCLK_RATE 24000000
>
> @@ -138,6 +141,7 @@ struct ov9282 {
> struct clk *inclk;
> struct regulator_bulk_data supplies[OV9282_NUM_SUPPLIES];
> struct v4l2_ctrl_handler ctrl_handler;
> + bool noncontinuous_clock;
> struct v4l2_ctrl *link_freq_ctrl;
> struct v4l2_ctrl *hblank_ctrl;
> struct v4l2_ctrl *vblank_ctrl;
> @@ -211,7 +215,6 @@ static const struct ov9282_reg common_regs[] = {
> {0x4601, 0x04},
> {0x470f, 0x00},
> {0x4f07, 0x00},
> - {0x4800, 0x20},
> {0x5000, 0x9f},
> {0x5001, 0x00},
> {0x5e00, 0x00},
> @@ -684,6 +687,14 @@ static int ov9282_start_streaming(struct ov9282 *ov9282)
> return ret;
> }
>
> + ret = ov9282_write_reg(ov9282, OV9282_REG_MIPI_CTRL00, 1,
> + ov9282->noncontinuous_clock ?
> + OV9282_GATED_CLOCK : 0);
Wouldn't this better fit for power on?
> + if (ret) {
> + dev_err(ov9282->dev, "fail to write MIPI_CTRL00");
> + return ret;
> + }
> +
> /* Write sensor mode registers */
> reg_list = &ov9282->cur_mode->reg_list;
> ret = ov9282_write_regs(ov9282, reg_list->regs, reg_list->num_of_regs);
> @@ -861,6 +872,9 @@ static int ov9282_parse_hw_config(struct ov9282 *ov9282)
> if (ret)
> return ret;
>
> + ov9282->noncontinuous_clock =
> + bus_cfg.bus.mipi_csi2.flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
> +
> if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV9282_NUM_DATA_LANES) {
> dev_err(ov9282->dev,
> "number of CSI2 data lanes %d is not supported",
--
Kind regards,
Sakari Ailus
next prev parent reply other threads:[~2022-10-26 7:21 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-05 15:27 [PATCH 00/16] Updates to ov9282 sensor driver Dave Stevenson
2022-10-05 15:27 ` [PATCH 01/16] media: i2c: ov9282: Remove duplication of registers Dave Stevenson
2022-10-06 9:14 ` Jacopo Mondi
2022-10-05 15:27 ` [PATCH 02/16] media: i2c: ov9282: Split registers into common and mode specific Dave Stevenson
2022-10-06 9:15 ` Jacopo Mondi
2022-10-05 15:27 ` [PATCH 03/16] media: i2c: ov9282: Remove format code from the mode Dave Stevenson
2022-10-06 9:15 ` Jacopo Mondi
2022-10-05 15:27 ` [PATCH 04/16] media: i2c: ov9282: Remove pixel rate from mode definition Dave Stevenson
2022-10-06 9:17 ` Jacopo Mondi
2022-10-06 11:51 ` Dave Stevenson
2022-10-05 15:27 ` [PATCH 05/16] media: i2c: ov9281: Support more than 1 mode Dave Stevenson
2022-10-06 9:18 ` Jacopo Mondi
2022-10-26 7:22 ` Sakari Ailus
2022-10-05 15:27 ` [PATCH 06/16] media: i2c: ov9282: Correct HTS register for configured pixel rate Dave Stevenson
2022-10-06 9:23 ` Jacopo Mondi
2022-10-06 13:01 ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 07/16] media: i2c: ov9282: Reduce vblank_min values based on testing Dave Stevenson
2022-10-06 11:56 ` Jacopo Mondi
2022-10-06 13:02 ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 08/16] media: i2c: ov9282: Add selection for CSI2 clock mode Dave Stevenson
2022-10-06 9:24 ` Jacopo Mondi
2022-10-26 7:21 ` Sakari Ailus [this message]
2022-10-28 12:57 ` Dave Stevenson
2022-10-28 14:30 ` Sakari Ailus
2022-10-28 15:03 ` Dave Stevenson
2022-10-31 13:06 ` Sakari Ailus
2022-10-05 15:28 ` [PATCH 09/16] media: i2c: ov9282: Add the properties from fwnode Dave Stevenson
2022-10-06 11:57 ` Jacopo Mondi
2022-10-05 15:28 ` [PATCH 10/16] media: i2c: ov9282: Action CID_VBLANK when set Dave Stevenson
2022-10-06 9:29 ` Jacopo Mondi
2022-10-06 13:21 ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 11/16] media: i2c: ov9282: Add HFLIP and VFLIP support Dave Stevenson
2022-10-06 9:38 ` Jacopo Mondi
2022-10-06 14:21 ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 12/16] media: i2c: ov9282: Make V4L2_CID_HBLANK r/w Dave Stevenson
2022-10-06 9:41 ` Jacopo Mondi
2022-10-06 11:33 ` Dave Stevenson
2022-10-06 11:53 ` Jacopo Mondi
2022-10-05 15:28 ` [PATCH 13/16] media: i2c: ov9282: Add selection API calls for cropping info Dave Stevenson
2022-10-06 9:43 ` Jacopo Mondi
2022-10-06 11:39 ` Dave Stevenson
2022-10-06 11:54 ` Jacopo Mondi
2022-10-05 15:28 ` [PATCH 14/16] media: i2c: ov9282: Add support for 1280x800 and 640x400 modes Dave Stevenson
2022-10-06 9:48 ` Jacopo Mondi
2022-10-06 11:46 ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 15/16] media: i2c: ov9282: Add support for 8bit readout Dave Stevenson
2022-10-06 9:57 ` Jacopo Mondi
2022-10-06 12:20 ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 16/16] media: i2c: ov9282: Support event handlers Dave Stevenson
2022-10-06 9:59 ` Jacopo Mondi
2022-10-07 10:22 ` Dave Stevenson
2022-10-07 12:57 ` Jacopo Mondi
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