Re: [PATCH v3 2/2] drm/bridge: imx: add driver for HDMI TX Parallel Video Interface

[Rob Herring <robh+dt@xxxxxxxxxx>]

On Wed, Sep 20, 2023 at 12:10 PM Lucas Stach <l.stach@xxxxxxxxxxxxxx> wrote:
>
> This IP block is found in the HDMI subsystem of the i.MX8MP SoC. It has a
> full timing generator and can switch between different video sources. On
> the i.MX8MP however the only supported source is the LCDIF. The block
> just needs to be powered up and told about the polarity of the video
> sync signals to act in bypass mode.
>
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Reviewed-by: Luca Ceresoli <luca.ceresoli@xxxxxxxxxxx> (v2)
> Tested-by: Marek Vasut <marex@xxxxxxx> (v1)
> Tested-by: Luca Ceresoli <luca.ceresoli@xxxxxxxxxxx> (v2)
> Tested-by: Richard Leitner <richard.leitner@xxxxxxxxxxx> (v2)
> Tested-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx> (v2)
> ---
>  drivers/gpu/drm/bridge/imx/Kconfig           |   7 +
>  drivers/gpu/drm/bridge/imx/Makefile          |   1 +
>  drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c | 206 +++++++++++++++++++
>  3 files changed, 214 insertions(+)
>  create mode 100644 drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c
>
> diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig
> index 9fae28db6aa7..3a4e663d922a 100644
> --- a/drivers/gpu/drm/bridge/imx/Kconfig
> +++ b/drivers/gpu/drm/bridge/imx/Kconfig
> @@ -3,6 +3,13 @@ if ARCH_MXC || COMPILE_TEST
>  config DRM_IMX_LDB_HELPER
>         tristate
>
> +config DRM_IMX8MP_HDMI_PVI
> +       tristate "Freescale i.MX8MP HDMI PVI bridge support"
> +       depends on OF
> +       help
> +         Choose this to enable support for the internal HDMI TX Parallel
> +         Video Interface found on the Freescale i.MX8MP SoC.
> +
>  config DRM_IMX8QM_LDB
>         tristate "Freescale i.MX8QM LVDS display bridge"
>         depends on OF
> diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile
> index 8e2ebf3399a1..be9b4f9adb50 100644
> --- a/drivers/gpu/drm/bridge/imx/Makefile
> +++ b/drivers/gpu/drm/bridge/imx/Makefile
> @@ -1,4 +1,5 @@
>  obj-$(CONFIG_DRM_IMX_LDB_HELPER) += imx-ldb-helper.o
> +obj-$(CONFIG_DRM_IMX8MP_HDMI_PVI) += imx8mp-hdmi-pvi.o
>  obj-$(CONFIG_DRM_IMX8QM_LDB) += imx8qm-ldb.o
>  obj-$(CONFIG_DRM_IMX8QXP_LDB) += imx8qxp-ldb.o
>  obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o
> diff --git a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c
> new file mode 100644
> index 000000000000..5ccd70c98187
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c
> @@ -0,0 +1,206 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +
> +/*
> + * Copyright (C) 2022 Pengutronix, Lucas Stach <kernel@xxxxxxxxxxxxxx>
> + */
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_crtc.h>
> +#include <linux/bitfield.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>

You probably don't need this header and the implicit includes it makes
are dropped now in linux-next. Please check what you actually need and
make them explicit.

Rob