linux-kernel - Re: [PATCH v2 6/6] drm/meson: add support for MIPI-DSI transceiver

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Message-ID: <CAMty3ZBvbPvKgUpNW1LVho5_S9kwzNioE0SxvX_E8bmgw-+fXw@mail.gmail.com>
Date:   Thu, 20 Jan 2022 19:54:55 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     dri-devel@...ts.freedesktop.org,
        martin.blumenstingl@...glemail.com,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 6/6] drm/meson: add support for MIPI-DSI transceiver

On Thu, Jan 20, 2022 at 2:04 PM Neil Armstrong <narmstrong@...libre.com> wrote:
>
> The Amlogic G12A/G12B/SM1 SoCs embeds a Synopsys DW-MIPI-DSI transceiver (ver 1.21a),
> with a custom glue managing the IP resets, clock and data input similar to the DW-HDMI
> Glue on other Amlogic SoCs.
>
> This adds support for the Glue managing the transceiver, mimicing the init flow provided
> by Amlogic to setup the ENCL encoder, the glue, the transceiver, the digital D-PHY and the
> Analog PHY in the proper way.
>
> An optional "MEAS" clock can be enabled to measure the delay between each vsync feeding the
> DW-MIPI-DSI transceiver.
>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  drivers/gpu/drm/meson/Kconfig             |   7 +
>  drivers/gpu/drm/meson/Makefile            |   1 +
>  drivers/gpu/drm/meson/meson_dw_mipi_dsi.c | 357 ++++++++++++++++++++++
>  drivers/gpu/drm/meson/meson_dw_mipi_dsi.h | 160 ++++++++++
>  4 files changed, 525 insertions(+)
>  create mode 100644 drivers/gpu/drm/meson/meson_dw_mipi_dsi.c
>  create mode 100644 drivers/gpu/drm/meson/meson_dw_mipi_dsi.h
>
> diff --git a/drivers/gpu/drm/meson/Kconfig b/drivers/gpu/drm/meson/Kconfig
> index 6c70fc3214af..71a1364b51e1 100644
> --- a/drivers/gpu/drm/meson/Kconfig
> +++ b/drivers/gpu/drm/meson/Kconfig
> @@ -17,3 +17,10 @@ config DRM_MESON_DW_HDMI
>         default y if DRM_MESON
>         select DRM_DW_HDMI
>         imply DRM_DW_HDMI_I2S_AUDIO
> +
> +config DRM_MESON_DW_MIPI_DSI
> +       tristate "MIPI DSI Synopsys Controller support for Amlogic Meson Display"
> +       depends on DRM_MESON
> +       default y if DRM_MESON
> +       select DRM_DW_MIPI_DSI
> +       select GENERIC_PHY_MIPI_DPHY
> diff --git a/drivers/gpu/drm/meson/Makefile b/drivers/gpu/drm/meson/Makefile
> index 833e18c20603..43071bdbd4b9 100644
> --- a/drivers/gpu/drm/meson/Makefile
> +++ b/drivers/gpu/drm/meson/Makefile
> @@ -6,3 +6,4 @@ meson-drm-y += meson_encoder_hdmi.o meson_encoder_dsi.o
>
>  obj-$(CONFIG_DRM_MESON) += meson-drm.o
>  obj-$(CONFIG_DRM_MESON_DW_HDMI) += meson_dw_hdmi.o
> +obj-$(CONFIG_DRM_MESON_DW_MIPI_DSI) += meson_dw_mipi_dsi.o

Can the naming convention prefix with dw-mipi-dsi like other glue
drivers follow?

Jagan.