[PATCH v4 02/12] drm: bridge: Add Samsung DSIM bridge driver

[Marek Szyprowski]

On 29.08.2022 20:40, Jagan Teki wrote:
> Samsung MIPI DSIM controller is common DSI IP that can be used in various
> SoCs like Exynos, i.MX8M Mini/Nano.
>
> In order to access this DSI controller between various platform SoCs,
> the ideal way to incorporate this in the drm stack is via the drm bridge
> driver.
>
> This patch is trying to differentiate platform-specific and bridge driver
> code and keep maintaining the exynos_drm_dsi.c code as platform-specific
> glue code and samsung-dsim.c as a common bridge driver code.
>
> - Exynos specific glue code is exynos specific te_irq, host_attach, and
>    detach code along with conventional component_ops.
>
> - Samsung DSIM is a bridge driver which is common across all platforms and
>    the respective platform-specific glue will initialize at the end of the
>    probe. The platform-specific operations and other glue calls will invoke
>    on associate code areas.
>
> v4:
> * include Inki Dae in MAINTAINERS
> * remove dsi_driver probe in exynos_drm_drv to support multi-arch build

This breaks Exynos DRM completely as the Exynos DRM driver is not able 
to wait until the DSI driver is probed and registered as component.

I will show how to rework this the way it is done in 
drivers/gpu/drm/exynos/exynos_dp.c and 
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c soon...

> v3:
> * restore gpio related fixes
> * restore proper bridge chain
> * rework initialization issue
> * fix header includes in proper way
>
> v2:
> * fixed exynos dsi driver conversion (Marek Szyprowski)
> * updated commit message
> * updated MAINTAINERS file
>
> v1:
> * don't maintain component_ops in bridge driver
> * don't maintain platform glue code in bridge driver
> * add platform-specific glue code and make a common bridge
>
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
> ---
>   MAINTAINERS                             |    9 +
>   drivers/gpu/drm/bridge/Kconfig          |   12 +
>   drivers/gpu/drm/bridge/Makefile         |    1 +
>   drivers/gpu/drm/bridge/samsung-dsim.c   | 1686 ++++++++++++++++++++++
>   drivers/gpu/drm/exynos/Kconfig          |    1 +
>   drivers/gpu/drm/exynos/exynos_drm_drv.c |    3 -
>   drivers/gpu/drm/exynos/exynos_drm_drv.h |    1 -
>   drivers/gpu/drm/exynos/exynos_drm_dsi.c | 1715 +----------------------
>   include/drm/bridge/samsung-dsim.h       |   99 ++
>   9 files changed, 1868 insertions(+), 1659 deletions(-)
>   create mode 100644 drivers/gpu/drm/bridge/samsung-dsim.c
>   create mode 100644 include/drm/bridge/samsung-dsim.h
>
> ...

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland