[RFC PATCH V7 1/3] media: platform: mtk-isp: Add Mediatek sensor interface driver

[Chun-Kuang Hu]

Hi, Louis:

Louis Kuo <louis.kuo at mediatek.com> 於 2020年7月8日 週三 下午6:41寫道：
>
> This patch adds Mediatek's sensor interface driver. Sensor interface
> driver is a MIPI-CSI2 host driver, namely, a HW camera interface controller.
> It support a widely adopted, simple, high-speed protocol primarily intended
> for point-to-point image and video transmission between cameras and host
> devices. The mtk-isp directory will contain drivers for multiple IP blocks
> found in Mediatek ISP system. It will include ISP Pass 1 driver, sensor
> interface driver, DIP driver and face detection driver.
>
> Signed-off-by: Louis Kuo <louis.kuo at mediatek.com>
> ---
>  drivers/media/platform/Makefile               |    1 +
>  drivers/media/platform/mtk-isp/Kconfig        |   18 +
>  drivers/media/platform/mtk-isp/Makefile       |    3 +
>  .../media/platform/mtk-isp/seninf/Makefile    |    7 +
>  .../platform/mtk-isp/seninf/mtk_seninf.c      |  974 +++++++++++
>  .../platform/mtk-isp/seninf/mtk_seninf_dphy.c |  353 ++++

I think phy driver should be placed in drivers/phy/mediatek and
separate phy driver to an independent patch.

>  .../platform/mtk-isp/seninf/mtk_seninf_reg.h  | 1491 +++++++++++++++++
>  .../mtk-isp/seninf/mtk_seninf_rx_reg.h        |  515 ++++++
>  8 files changed, 3362 insertions(+)
>  create mode 100644 drivers/media/platform/mtk-isp/Kconfig
>  create mode 100644 drivers/media/platform/mtk-isp/Makefile
>  create mode 100644 drivers/media/platform/mtk-isp/seninf/Makefile
>  create mode 100644 drivers/media/platform/mtk-isp/seninf/mtk_seninf.c
>  create mode 100644 drivers/media/platform/mtk-isp/seninf/mtk_seninf_dphy.c
>  create mode 100644 drivers/media/platform/mtk-isp/seninf/mtk_seninf_reg.h
>  create mode 100644 drivers/media/platform/mtk-isp/seninf/mtk_seninf_rx_reg.h
>

[snip]

> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/of_graph.h>
> +#include <linux/of_irq.h>

No irq handler, so remove this.

> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/slab.h>
> +#include <linux/videodev2.h>
> +#include <media/v4l2-async.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-event.h>
> +#include <media/v4l2-fwnode.h>
> +#include <media/v4l2-subdev.h>
> +#include <linux/phy/phy.h>
> +#include "mtk_seninf_reg.h"
> +

[snip]

> +
> +static int seninf_set_ctrl(struct v4l2_ctrl *ctrl)
> +{
> +       struct mtk_seninf *priv = container_of(ctrl->handler,
> +                                            struct mtk_seninf, ctrl_handler);
> +
> +       switch (ctrl->id) {
> +       case V4L2_CID_TEST_PATTERN:
> +               if (ctrl->val == TEST_GEN_PATTERN)
> +                       return seninf_enable_test_pattern(priv);

Without this, this driver still works, so move this to an independent patch.

> +               else if (ctrl->val == TEST_DUMP_DEBUG_INFO)
> +                       return seninf_dump_debug_info(priv);

Ditto.

> +               else
> +                       return -EINVAL;
> +       }
> +
> +       return 0;
> +}
> +

[snip]

> +
> +#ifdef CONFIG_OF
> +static const struct of_device_id mtk_mipi_dphy_of_match[] = {
> +       {.compatible = "mediatek,mt8183-mipi_dphy"},

Where is the definition of "mediatek,mt8183-mipi_dphy"?

Regards,
Chun-Kuang.

> +       {},
> +};
> +MODULE_DEVICE_TABLE(of, mtk_mipi_dphy_of_match);
> +#endif
> +
> +static struct platform_driver mipi_dphy_pdrv = {
> +       .probe  = mipi_dphy_probe,
> +       .driver = {
> +               .name   = "mipi_dphy",
> +               .of_match_table = of_match_ptr(mtk_mipi_dphy_of_match),
> +       },
> +};
> +
> +module_platform_driver(mipi_dphy_pdrv);
> +