[PATCH] drm/bridge: ti-sn65dsi83: Implement .detach callback

[Robert Foss]

Applied to drm-misc-next

On Thu, 7 Oct 2021 at 21:51, Marek Vasut <marex at denx.de> wrote:
>
> On 10/6/21 11:47 AM, Robert Foss wrote:
> >>
> > On Tue, 7 Sept 2021 at 04:40, Marek Vasut <marex at denx.de> wrote:
> >>
> >> Move detach implementation from sn65dsi83_remove() to dedicated
> >   .detach callback. There is no functional change to the code, but
> >> that detach is now in the correct location.
> >>
> >> Signed-off-by: Marek Vasut <marex at denx.de>
> >> Cc: Jagan Teki <jagan at amarulasolutions.com>
> >> Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> >> Cc: Linus Walleij <linus.walleij at linaro.org>
> >> Cc: Robert Foss <robert.foss at linaro.org>
> >> Cc: Sam Ravnborg <sam at ravnborg.org>
> >> Cc: dri-devel at lists.freedesktop.org
> >> ---
> >>   drivers/gpu/drm/bridge/ti-sn65dsi83.c | 17 ++++++++++++++---
> >>   1 file changed, 14 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> >> index 4ea71d7f0bfbc..13ee313daba96 100644
> >> --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> >> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> >> @@ -288,6 +288,19 @@ static int sn65dsi83_attach(struct drm_bridge *bridge,
> >>          return ret;
> >>   }
> >>
> >> +static void sn65dsi83_detach(struct drm_bridge *bridge)
> >> +{
> >> +       struct sn65dsi83 *ctx = bridge_to_sn65dsi83(bridge);
> >> +
> >> +       if (!ctx->dsi)
> >> +               return;
> >> +
> >> +       mipi_dsi_detach(ctx->dsi);
> >> +       mipi_dsi_device_unregister(ctx->dsi);
> >> +       drm_bridge_remove(&ctx->bridge);
> >> +       ctx->dsi = NULL;
> >
> > Is this assignment necessary? I'm not seeing it in the other drivers.
> >
> > WIth this cleared up feel free to add my r-b.
> > Reviewed-by: Robert Foss <robert.foss at linaro.org>
>
> It works in tandem with the if (!ctx->dsi) return; at the beginning to
> prevent crash in case the detach callback was called multiple times for
> whatever reason.