Re: [PATCH 00/11] drm: bridge: Add Samsung MIPI DSIM bridge

[Tim Harvey <tharvey@xxxxxxxxxxxxx>]

On Fri, Apr 8, 2022 at 9:22 AM Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> This series supports common bridge support for Samsung MIPI DSIM
> which is used in Exynos and i.MX8MM SoC's.
>
> Previous RFC can be available here [1].
>
> The final bridge supports both the Exynos and i.MX8MM DSI devices.
>
> On, summary this patch-set break the entire DSIM driver into
> - platform specific glue code for platform ops, component_ops.
> - common bridge driver which handle platform glue init and invoke.
>
> Patch 0000:     Samsung DSIM bridge
>
> Patch 0001:     platform init flag via driver_data
>
> Patch 0002/9:   bridge fixes, atomic API's
>
> Patch 0010:     document fsl,imx8mm-mipi-dsim
>
> Patch 0011:     add i.MX8MM DSIM support
>
> Tested in Engicam i.Core MX8M Mini SoM.
>
> Anyone interested, please have a look on this repo [2]
>
> [2] https://github.com/openedev/kernel/tree/imx8mm-dsi-v1
> [1] https://lore.kernel.org/linux-arm-kernel/YP2j9k5SrZ2%2Fo2%2F5@xxxxxxxxxxxx/T/
>
> Any inputs?
> Jagan.
>
> Jagan Teki (11):
>   drm: bridge: Add Samsung DSIM bridge driver
>   drm: bridge: samsung-dsim: Handle platform init via driver_data
>   drm: bridge: samsung-dsim: Mark PHY as optional
>   drm: bridge: samsung-dsim: Add DSI init in bridge pre_enable()
>   drm: bridge: samsung-dsim: Fix PLL_P (PMS_P) offset
>   drm: bridge: samsung-dsim: Add module init, exit
>   drm: bridge: samsung-dsim: Add atomic_check
>   drm: bridge: samsung-dsim: Add atomic_get_input_bus_fmts
>   drm: bridge: samsung-dsim: Add input_bus_flags
>   dt-bindings: display: exynos: dsim: Add NXP i.MX8MM support
>   drm: bridge: samsung-dsim: Add i.MX8MM support
>
>  .../bindings/display/exynos/exynos_dsim.txt   |    1 +
>  MAINTAINERS                                   |   12 +
>  drivers/gpu/drm/bridge/Kconfig                |   12 +
>  drivers/gpu/drm/bridge/Makefile               |    1 +
>  drivers/gpu/drm/bridge/samsung-dsim.c         | 1803 +++++++++++++++++
>  drivers/gpu/drm/exynos/Kconfig                |    1 +
>  drivers/gpu/drm/exynos/exynos_drm_dsi.c       | 1704 +---------------
>  include/drm/bridge/samsung-dsim.h             |   97 +
>  8 files changed, 1982 insertions(+), 1649 deletions(-)
>  create mode 100644 drivers/gpu/drm/bridge/samsung-dsim.c
>  create mode 100644 include/drm/bridge/samsung-dsim.h
>
> --
> 2.25.1
>

Jagan,

Thanks so much for continuing to work this through!

I've successfully tested this series on imx8mm-venice-gw73xx-0x using
the following:
- DFROBOT 7" raspberrypi touchscreen display (DFR0506) [1]
- the following defconfig:
CONFIG_REGULATOR_RASPBERRYPI_TOUCHSCREEN_ATTINY
CONFIG_DRM_PANEL_SIMPLE
CONFIG_DRM_PANEL_BRIDGE
CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN
CONFIG_DRM_TOSHIBA_TC358762
CONFIG_DRM_SAMSUNG_DSIM
CONFIG_DRM_MXSFB
- the following dt overlay:
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
 * Copyright 2022 Gateworks Corporation
 */

#include <dt-bindings/gpio/gpio.h>

#include "imx8mm-pinfunc.h"

/dts-v1/;
/plugin/;

&{/} {
        compatible = "gw,imx8mm-gw73xx-0x", "fsl,imx8mm";

        panel {
                compatible = "powertip,ph800480t013-idf02";
                power-supply = <&attiny>;
                backlight = <&attiny>;

                port {
                        panel_out_bridge: endpoint {
                                remote-endpoint = <&bridge_out_panel>;
                        };
                };
        };
};

&i2c3 {
        #address-cells = <1>;
        #size-cells = <0>;

        attiny: regulator@45 {
                compatible = "raspberrypi,7inch-touchscreen-panel-regulator";
                reg = <0x45>;
        };
};

&lcdif {
        status = "okay";
};

&dsi {
        #address-cells = <1>;
        #size-cells = <0>;
        status = "okay";

        bridge@0 {
                compatible = "toshiba,tc358762";
                reg = <0>;
                vddc-supply = <&attiny>;
                #address-cells = <1>;
                #size-cells = <0>;
                status = "okay";

                ports {
                        #address-cells = <1>;
                        #size-cells = <0>;

                        port@0 {
                                reg = <0>;
                                bridge_in_dsi: endpoint {
                                        remote-endpoint = <&dsi_out_bridge>;
                                        data-lanes = <0 1>;
                                };
                        };

                        port@1 {
                                reg = <1>;
                                bridge_out_panel: endpoint {
                                        remote-endpoint = <&panel_out_bridge>;
                                };
                        };
                };
        };

        ports {
                #address-cells = <1>;
                #size-cells = <0>;

                port@1 {
                        reg = <1>;

                        dsi_out_bridge: endpoint {
                                remote-endpoint = <&bridge_in_dsi>;
                        };
                };
        };
};

Tested-by: Tim Harvey <tharvey@xxxxxxxxxxxxx> #imx8mm-venice-gw73xx with DFR0506

I'll be happy to test any follow-on series as needed.

Best Regards,

Tim
[1] https://www.dfrobot.com/product-1655.html