[PATCH v2 09/13] drm/modes: parse_cmdline: Add support for specifying panel_orientation (v2)

[Maxime Ripard]

On Wed, Nov 13, 2019 at 05:44:30PM +0100, Hans de Goede wrote:
> Sometimes we want to override a connector's panel_orientation from the
> kernel commandline. Either for testing and for special cases, e.g. a kiosk
> like setup which uses a TV mounted in portrait mode.
>
> Users can already specify a "rotate" option through a video= kernel cmdline
> option. But that only supports 0/180 degrees (see drm_client_modeset TODO)
> and only works for in kernel modeset clients, not for userspace kms users.
>
> The "panel-orientation" connector property OTOH does support 90/270 degrees
> as it leaves dealing with the rotation up to userspace and this does work
> for userspace kms clients (at least those which support this property).
>
> Changes in v2:
> -Add missing ':' after @panel_orientation (reported by kbuild test robot)
>
> BugLink: https://gitlab.freedesktop.org/plymouth/plymouth/merge_requests/83
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>

Acked-by: Maxime Ripard <mripard at kernel.org>

Maxime
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